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Freescale Semiconductor Advance Information
Document Number: MC33904_5 Rev. 3.0, 2/2010
System Basis Chip Gen2 with High Speed CAN and LIN Interface
The 33904/5 is the second generation family of System Basis Chips which combine several features and enhance present module designs. The device works as an advanced power management unit for the MCU and additional integrated circuits such as sensors, CAN transceivers. It has a built-in enhanced high speed CAN interface (ISO11898-2 and -5), with local and bus failure diagnostics, protection, and fail safe operation mode. The SBC may include one or two LIN 2.1 interfaces with LIN output pin switches. It includes up to 4 wake-up input pins than can also be configured as output drivers for flexibility. This device implements multiple Low Power modes, with very lowcurrent consumption. In addition, the device is part of a family concept where pin compatibility, among the various devices with and without LIN interfaces, add versatility to module design. The 33904/5 also implements an innovative and advanced fail-safe state machine and concept solution.
33904 33904/5 33905
SBC CAN GEN2
EK SUFFIX (PB-FREE) 98ASA10556D 32-PIN SOIC EP
EK SUFFIX (PB-FREE) 98ASA10506D 54-PIN SOIC EP
Features
* Protected 5.0V or 3.3V regulators for MCU (part number selectable) and additional ICs (SPI configurable) with optional external PNP usage to increase current capability for MCU. * Fully-protected embedded 5.0 V regulator for the CAN driver * Extremely low quiescent current in low power modes * Multiple under-voltage detections to address various MCU specifications and system operation modes (i.e. cranking) * Multiple wake-up sources in low power modes: CAN or LIN bus, I/O transition, automatic timer, SPI message, and VDD over-current detection. * Voltage, current and temperature protection with enhanced diagnostics that can be monitored by system via MUX output * ISO11898-5 high speed CAN interface compatibility for baud rates of 40 kb/s to 1.0 Mb/s. LIN 2.1 and J2602 LIN interface compatibility * Pb-free packaging designated by suffix code EK
VBAT D1
ORDERING INFORMATION
Device PCZ33905D3EK/R2 MCZ33905D5EK/R2 PCZ33905S3EK/R2 MCZ33905S5EK/R2 PCZ33904A3EK/R2 MCZ33904A5EK/R2 -40C to 125C 32 SOIC EP Temperature Range (TA) Package
54 SOIC EP
33905D
(5.0 V/3.3 V)
* = Optional
Q2 Q1*
VBAUX VCAUX VSUP1 VAUX VE VB VDD VSUP2 SAFE DBG GND VSENSE I/O-0 RST INT MOSI SCLK MISO CS MUX-OUT 5V-CAN TXD RXD TXD-L1 RXD-L1 TXD-L2 RXD-L2
VDD
SPI
A/D
MCU
I/O-1 CANH SPLIT
CAN Bus LIN Bus LIN Bus
CANL LIN-TERM 1 LIN-1 LIN-TERM 2 LIN-2
Figure 1. 33905D Simplified Application Diagram
* This document contains certain information on a new product. Specifications and information herein are subject to change without notice.
(c) Freescale Semiconductor, Inc., 2010. All rights reserved.
VBAT D1
33905S
(5.0 V/3.3 V)
* = Optional
Q2 Q1*
VBAUX VCAUX VSUP1 VAUX VE VB VDD VSUP2 SAFE DBG GND VSENSE I/O-0 RST INT MOSI SCLK MISO CS MUX-OUT 5V-CAN TXD RXD TXD-L RXD-L
VDD
SPI
A/D
MCU
I/O-1 CANH SPLIT
CAN Bus
VBAT
CANL LIN-T LIN I/O-3
LIN Bus
Figure 2. 33905S Simplified Application Diagram
VBAT D1
33904A
(5.0 V/3.3 V)
* = Optional
Q2 Q1*
VBAUX VCAUX VSUP1 VAUX VE VB VDD VSUP2 SAFE DBG GND VSENSE I/O-0 RST INT MOSI SCLK MISO CS MUX-OUT 5V-CAN TXD RXD
VDD
SPI
A/D
MCU
I/O-1 CANH
VBAT
SPLIT
CAN Bus
CANL I/O-2
I/O-3
Figure 3. 33904A Simplified Application Diagram
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DEVICE VARIATIONS
DEVICE VARIATIONS
Table 1. Device Variations
Freescale Part No. PCZ33905D3EK/R2 MCZ33905D5EK/R2 Vdd output voltage 3.3V 5V 1 2 CAN interface LIN interface(s) Wake up input / LIN master termination 2 wake up + 2 LIN terms or 3 wake up + 1 LIN terms or 4 wake up + no LIN terms PCZ33905S3EK/R2 MCZ33905S5EK/R2 PCZ33904A3EK/R2 MCZ33904A5EK/R2 3.3V 5V 3.3V 1 5V no 4 wake up 1 1 3 wake up + 1 LIN terms or 4 wake up + no LIN terms SOIC 32pins exposed pad SOIC 32pins exposed pad SOIC 54 pins exposed pad Package
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TABLE OF CONTENTS
TABLE OF CONTENTS
Internal Block Diagram .............................................................................................................................. 5 Pin Connections ........................................................................................................................................ 8 Electrical Characteristics ......................................................................................................................... 12 Maximum Ratings ................................................................................................................................. 12 Static Electrical Characteristics ............................................................................................................ 14 Dynamic Electrical Characteristics ....................................................................................................... 21 Timing Diagrams .................................................................................................................................. 24 Functional Description ............................................................................................................................. 28 Introduction ........................................................................................................................................... 28 Functional Pin Description .................................................................................................................... 28 Functional Device Operation ................................................................................................................... 32 Mode and State Description ................................................................................................................. 32 Low Power Modes ................................................................................................................................ 33 State Diagram ....................................................................................................................................... 34 Mode Change ....................................................................................................................................... 35 Watchdog Operation ............................................................................................................................. 35 Functional Block Operation Versus Mode ............................................................................................ 37 Illustration of Device Mode Transitions. ................................................................................................ 37 Cyclic Sense Operation During LP Modes ........................................................................................... 39 Behavior at Power Up and Power Down .............................................................................................. 40 Fail Safe Operation ................................................................................................................................. 42 CAN Interface ....................................................................................................................................... 46 CAN Interface Description .................................................................................................................... 46 CAN Bus Fault Diagnostic .................................................................................................................... 50 LIN Block ................................................................................................................................................. 53 LIN Interface Description ...................................................................................................................... 53 LIN Operational Modes ......................................................................................................................... 53 Serial Peripheral Interface ....................................................................................................................... 55 High Level Overview ............................................................................................................................. 55 Detail Operation .................................................................................................................................... 56 Detail of Control Bits And Register Mapping ........................................................................................ 59 Flags ..................................................................................................................................................... 75 Typical Applications ................................................................................................................................ 80 Packaging ............................................................................................................................................... 84
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INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VBAUX VCAUX VAUX
VSUP1
VE VB
VSUP2
5 V Auxiliary Regulator
VS2-INT
VDD Regulator
VDD
SAFE
RST
Fail-safe
DBG GND VSENSE
INT MOSI
Power Management
Oscillator
State Machine SPI
SCLK MISO CS
Analog Monitoring Signals Condition & Analog MUX
MUX-OUT
I/O-0 I/O-1 CANH SPLIT CANL VS2-INT
VS2-INT
Configurable Input-Output
5 V-CAN Regulator
5V-CAN
Enhanced High-speed CAN Physical Interface
TXD RXD TXD-L1
LIN-TERM1 LIN-1 LIN-TERM2 LIN-2 VS2-INT
LIN 2.1 Interface - #1
RXD-L1 TXD-L2
LIN 2.1 Interface - #2
RXD-L2
Figure 4. 33905D Internal Block Diagram
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5
INTERNAL BLOCK DIAGRAM
VBAUX VCAUX VAUX
VSUP1
VE VB
VSUP2
5 V Auxiliary Regulator
VS2-INT
VDD Regulator
VDD
SAFE
RST
Fail-safe
DBG GND VSENSE
INT MOSI
Power Management
Oscillator
State Machine SPI
SCLK MISO CS
Analog Monitoring Signals Condition & Analog MUX
MUX-OUT
I/O-0 I/O-1 I/O-3 CANH SPLIT CANL VS2-INT LIN-T LIN
VS2-INT
Configurable Input-Output
5 V-CAN Regulator
5V-CAN
Enhanced High-speed CAN Physical Interface
TXD RXD
LIN Term #1
TXD-L
LIN 2.1 Interface - #1
RXD-L
Figure 5. 33905S Internal Block Diagram
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INTERNAL BLOCK DIAGRAM
VBAUX VCAUX VAUX
VSUP1
VE VB
VSUP2
5 V Auxiliary Regulator
VS2-INT
VDD Regulator
VDD
SAFE
RST
Fail Safe
DBG GND VSENSE
INT MOSI
Power Management
Oscillator
State Machine SPI
SCLK MISO CS
Analog Monitoring Signals Condition & Analog MUX
MUX-OUT
I/O-0 I/O-1 I/O-2 I/O-3 CANH SPLIT CANL
Configurable Input-Output
VS2-INT
5V-CAN Regulator
5V-CAN
Enhanced High Speed CAN Physical Interface
TxD RXD
Figure 6. 33904A Internal Block Diagram
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PIN CONNECTIONS
PIN CONNECTIONS
MC33905D
NC NC NC VSUP1 VSUP2 LIN-T2 LIN-T1 SAFE 5V-CAN CANH CANL GND CAN SPLIT V-BAUX V-CAUX V-AUX MUX-OUT I/O-0 DBG NC NC NC TXDL2 GND RXDL2 LIN-2 NC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 54 53 52 51 50 49 48 47 46 45 44 43
MC33905S
MC33904A
GND SEE NOTE 1
42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
1 1 32 32 VB VB NC VSUP1 VSUP1 2 31 2 31 VE VE NC VSUP2 VSUP2 3 30 3 30 RXD RXD I/O-3 I/O-3 NC 4 29 4 29 LIN-T I/O-2 VB TXD TXD 5 28 5 28 SAFE SAFE VDD VDD VE 6 27 6 27 5V-CAN 5V-CAN RXD MISO MISO 7 26 7 26 CANH CANH TXD MOSI MOSI GND GND 8 25 8 25 CANL CANL SEE VDD SCLK SCLK SEE NOTE 1 24 NOTE 1 9 24 9 GND CAN GND CAN MISO CS CS 10 23 10 23 SPLIT SPLIT MOSI INT INT 11 22 11 22 V-BAUX V-BAUX SCLK RST RST V-CAUX V-CAUX 12 12 21 21 I/O-1 I/O-1 CS 13 20 13 20 V-AUX V-AUX INT VSENSE VSENSE 14 19 14 19 MUX-OUT RXD-L MUX-OUT NC RST 15 18 15 18 I/O-0 I/O-0 TXD-L NC I/O-1 16 17 16 17 DBG DBG LIN NC VSENSE RXD-L1 GND - LEAD FRAME GND - LEAD FRAME TXD-L1 LIN-1 32 pins exposed package 32 pins exposed package NC NC NC NC GND NC NC NC
54 pins exposed package
Note 1: Exposed pad should be connected to electrical ground.
Figure 7. 33904/5 Pin Connections Table 2. 33904/5 Pin Definitions A functional description of each pin can be found in the Functional Pin Description section beginning on page 28.
Pin # Pin # Pin # 33905D 33905S 33904A 1-3,2022,2730,3235,52-54 4 5 N/A 17, 18, 19 Pin Name N/C Pin Function No Connect Formal Name No Connection Definition
1 2
1 2
VSUP1 VSUP2
Power Power
Battery Voltage Supply 1 Battery Voltage Supply 2
Supply input for the device internal supplies, power on reset circuitry and the VDD regulator. Supply input for 5 V-CAN regulator, VAUX regulator, I/O and LIN Terminals.
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PIN CONNECTIONS
Table 2. 33904/5 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on page 28.
Pin # Pin # Pin # 33905D 33905S 33904A 6 3 3 Pin Name LIN-T2 or I/O-3 Pin Function Output or Input/Output Formal Name LIN Termination 2 or Input/Output 3 Definition 33905D, Output pin for the LIN2 master node termination resistor. or 33904A/33905S, Configurable pin as an input or high side output, for connection to external circuitry (switched or small load). The input can be used as a programmable wake-up input in Low Power mode. When used as a high side, no overtemperature protection is implemented. A basic short to GND protection function, based on switch drain-source overvoltage detection, is available. 33905D, Output pin for the LIN1 master node termination resistor. or 33905S, 33905D, Configurable pin as an input or high side output, for connection to external circuitry (switched or small load). The input can be used as a programmable wake-up input in Low Power mode. When used as a high side, no overtemperature protection is implemented. A basic short to GND protection function, based on switch drain-source overvoltage detection, is available. 33904, Configurable terminal as input or high side output, for connection to external circuitry (switched or small load). Input can be used as a programmable wake-up input from Low Power Mode. When used as high side, no over-temperature protection is implemented. A basic short to GND protection function based on switch drain-source over-voltage detection is available. Output of the safe circuitry. The pin is asserted LOW in case of a safe condition is detected (e.g.: software watchdog is not triggered, VDD low, issue on reset pin etc.). Open drain structure. Output voltage for the embedded CAN interface. A capacitor must be connected to this pin. CAN high output. CAN low output. Power GND of the embedded CAN interface Output pin for connection to the middle point of the split CAN termination Output pin for external path PNP transistor base Output pin for external path PNP transistor collector Output pin for the auxiliary voltage. Multiplexed output to be connected to an MCU A/D input. Selection of the analog parameter available at MUX-OUT is done via the SPI. A switchable internal pull-down resistor is integrated for VDD current sense measurements.
7
4
4
LIN-T1 or LIN-T
Output or Input/Output
LIN Termination 1 or Input/Output 2
I/O-2
I/O-2
8
5
5
SAFE
Output
Safe Output (Active LOW)
9 10 11 12 13 14 15 16 17
6 7 8 9 10 11 12 13 14
6 7 8 9 10 11 12 13 14
5 V-CAN CANH CANL GND-CAN SPLIT VBAUX VCAUX VAUX MUX-OUT
Output Output Output Ground Output Output Output Output Output
5V-CAN CAN High CAN Low GND-CAN SPLIT Output VB Auxiliary VCOLLECTOR Auxiliary VOUT Auxiliary Multiplex Output
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PIN CONNECTIONS
Table 2. 33904/5 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on page 28.
Pin # Pin # Pin # 33905D 33905S 33904A 18 15 15 Pin Name I/O-0 Pin Function Input/Output Formal Name Input/Output 0 Definition Configurable pin as an input or output, for connection to external circuitry (switched or small load). The voltage level can be read by the SPI and via the MUX output pin. The input can be used as a programmable wake-up input in Low Power Mode. In low power, when used as an output, the high side or low side can be activated for a cyclic sense function. Input to activate the Debug Mode. In Debug Mode, no watchdog refresh is necessary. Outside of Debug Mode, connection of a resistor between DBG and GND allows the selection of Safe Mode functionality. LIN bus transmit data input. Includes an internal pull-up resistor to VDD. Ground of the IC. LIN bus receive data output. LIN bus input output connected to the LIN bus. LIN bus input output connected to the LIN bus.
19
16
16
DBG
Input
Debug
23 24,31 25 26 36
N/A N/A N/A N/A 17
N/A N/A N/A N/A 17
TXD-L2 GND RXD-L2 LIN2 33905D LIN-1 33905S LIN
Input Ground Output Input/Output Input/Output
LIN Transmit Data 2 Ground LIN Receive Data LIN bus LIN bus
37
18
18
33905D TXD-L1 33905S TXD-L
Input
LIN Transmit Data LIN Receive Data Sense input Input Output 1
LIN bus transmit data input. Includes an internal pull-up resistor to VDD. LIN bus receive data output.
38
19
19
33905D RXD-L1 33905S RXD-L
Output
39 40
20 21
20 21
VSENSE I/O-1
Input Input/Output
Direct battery voltage input sense. A serial resistor is required to limit the input current during high voltage transients. Configurable pin as an input or output, for connection to external circuitry (switched or small load). The voltage level can be read by the SPI and via the MUX output pin. The input can be used as a programmable wake-up input in Low Power Mode. Can be used in association with I/O-0 for a cyclic sense function in Low Power Mode. This is the device reset output whose main function is to reset the MCU. This pin has an internal pull-up to VDD. The reset input voltage is also monitored in order to detect external reset and safe conditions. This output is asserted low when an enabled interrupt condition occurs. The output is a push-pull structure. Chip select pin for the SPI. When the CS is low, the device is selected. In Low Power Mode with VDD ON, a transition on CS is a wake-up condition
41
22
22
RST
Output
Reset Output (Active LOW)
42 43
23 24
23 24
INT CS
Output Input
Interrupt Output (Active LOW) Chip Select (Active LOW)
44 45 46 47
25 26 27 28
25 26 27 28
SCLK MOSI MISO VDD
Input Output Input Output
Serial Data Clock Clock input for the Serial Peripheral Interface (SPI) of the device Master Out / Slave In Master In / Slave Out Voltage Digital Drain SPI data received by the device SPI data sent to the MCU. When the CS is high, MISO is highimpedance 5.0 V or 3.3 V output pin of the main regulator for the Microcontroller supply.
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PIN CONNECTIONS
Table 2. 33904/5 Pin Definitions (continued) A functional description of each pin can be found in the Functional Pin Description section beginning on page 28.
Pin # Pin # Pin # 33905D 33905S 33904A 48 49 50 51 29 30 31 32 29 30 31 32 Pin Name TXD RXD VE VB GND Output Ground Pin Function Input Output Formal Name Transmit Data Receive Data Voltage Emitter Voltage Base Ground Definition CAN bus transmit data input. Internal pull-up to VDD CAN bus receive data output Connection to the external PNP path transistor. This is an intermediate current supply source for the VDD regulator Base output pin for connection to the external PNP pass transistor Ground
EX PAD EX PAD EX PAD
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ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 3. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device.
Ratings ELECTRICAL RATINGS(2) Supply Voltage at VSUP1and VSUP2 Normal Operation (DC) Transient Conditions (Load Dump) DC voltage on LIN, LIN1 and LIN2 Normal Operation (DC) Transient Conditions (Load Dump) DC voltage on CANL, CANH, SPLIT Normal Operation (DC) Transient Conditions (Load Dump) DC Voltage at SAFE Normal Operation (DC) Transient Conditions (Load Dump) DC Voltage at I/O-0, I/O-1, I/O-2, I/O-3 (LIN-Terminal Pins) Normal Operation (DC) Transient Conditions (Load Dump) DC voltage on TXDL1 TXDL2, RXDL2, RXDL2 DC voltage on TXD, RXD DC Voltage at INT DC Voltage at RST DC Voltage at MOSI, MSIO, SCLK and CS DC Voltage at MUXOUT DC Voltage at DBG Continuous current on CANH and CANL VI/O VI/OTR VDIGLIN VDIG VINT VRST VRST VMUX VDBG ILH -0.3 to 27 -0.3 to 40 -0.3 to VDD +0.3 -0.3 to VDD +0.3 -0.3 to 10 -0.3 to VDD +0.3 -0.3 to VDD +0.3 -0.3 to VDD +0.3 -0.3 to 10 200 V V V V V V V mA VSAFE VSAFETR -0.3 to 27 -0.3 to 40 V VBUS VBUSTR -32 to 27 -32 to 40 V VBUSLIN VBUSLINTR -27 to 27 -27 to 40 V VSUP1/2 VSUP1/2TR -0.3 to 27 -0.3 to 40 V V Symbol Value Unit
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ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS
Table 3. Maximum Ratings (continued) All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device.
Ratings ESD Capability * AECQ100(1) Human Body Model - JESD22/A114 (CZAP = 100 pF, RZAP = 1500 ) CANH and CANL. LIN1 and LIN2, Pins versus all GND pins all other Pins including CANH and CANL Charge Device Model - JESD22/C101 (CZAP = 4.0 pF) Corner Pins (Pins 1, 16, 17, and 32) All other Pins (Pins 2-15, 18-31) * According to IEC 61000-4-2 (CZAP = 150 pF, RZAP = 330 ) device unpowered, CANH and CANL pin without capacitor, versus GND device unpowered, LIN pin, versus GND device unpowered, VS1/VS2 (100 nF to GND), versus GND * According to "OEM_HW_Requirements_For_CAN_LIN_FR-Interfaces_V1 0_20081210.pdf" CANH, CANL without bus filter LIN with and without bus filter I/O with external components (22k - 10nF) THERMAL RATINGS Junction temperature Ambient temperature Storage temperature THERMAL RESISTANCE Thermal resistance junction to ambient Peak Package Reflow Temperature During Reflow
(2), (3)
Symbol
Value
Unit V
VESD1-1 VESD1-2 VESD2-1 VESD2-2 VESD3-1 VESD3-2 VESD3-3
8000 2000 750 500 15000 15000 15000
VESD4-1 VESD4-2 VESD4-3
9000 12000 7000
TJ TA TST
150 -40 to 125 -55 to 165
C C C
RJA TPPRT
50(4) Note 3
C/W C
Notes 1. ESD testing is performed in accordance with the Human Body Model (HBM) (CZAP = 100 pF, RZAP = 1500 ) and the Charge Device Model (CDM), Robotic (CZAP = 4.0 pF). 2. The voltage on non-Vsup pins should never exceed the Vsup voltage at any time or permanent damage to the device may occur.Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device. Freescale's Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow Temperature and Moisture Sensitivity Levels (MSL), Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics. This parameter was measured according to Figure 8 below:
3.
4.
PCB 100mm x 100mm
Top side, 300 sq. mm (20mmx15mm)
Bottom side 20mm x 40mm
Bottom view
Figure 8. PCB with Top and Bottom Layer Dissipation Area (Dual Layer)
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic POWER INPUT Nominal DC Voltage Range(5) Extended DC Low Voltage Range(6) Under-voltage Detector Thresholds, at VSUP1 pin, Low threshold (VSUP1 ramp down) High threshold (VSUP1 ramp up) Hysteresis Note: function not active in Low Power modes Under-voltage Detector Thresholds, at VSUP2 pin: Low threshold (VSUP2 ramp down) High threshold (VSUP2 ramp up) Hysteresis Note: function not active in Low Power modes VSUP Over-voltage Detector Thresholds, at VSUP1 pin: Not active in Low Power modes Battery loss detection threshold, at VSUP1 pin. Vsup 1 to turn Vdd ON, Vsup1 rising Vsup 1 to turn Vdd ON, hysteresis (guaranteed by design) Supply current(7) - from VSUP1 - from VSUP2, (5V-CAN Vaux, I/O OFF) Supply current, ISUP1 + ISUP2, Normal Mode, VDD ON - 5 V-CAN OFF, VAUX OFF - 5 V-CAN ON, CAN interface in Low Power VDD OFF Mode, VAUX OFF - 5 V-CAN OFF, Vaux ON - 5 V-CAN ON, CAN interface in TxRx Mode, VAUX OFF, I/O-x disable Low Power Mode VDD off. Wake-up from CAN, I/Ox inputs VSUP =< 18 V, -40 to 25C VSUP =18 V, 125C Low Power Mode VDD ON (5.0 V) with VDD under-voltage and VDD over-current monitoring, wake-up from CAN, I/Ox inputs VSUP =< 18 V, -40 to 25C, IDD = 1.0A VSUP =< 18 V, -40 to 25C, IDD = 100 A (20% of IDD load) VSUP =18 V, 125C, IDD = 100 A Low Power Mode, additional current for oscillator (used for: cyclic sense, forced wake-up, and in Low Power VDD ON Mode cyclic interruption and watchdog) VSUP =<18 V, -40C to 125C IOSC 5.0 9 ILPM_ON 20 40 65 85 A ILPM_OFF 15 35 50 A ISUP1+2 N1 2.8 4.5 5.0 5.5 8.0 A BATFAIL Vsup-th1 Vsup-th1hyst ISUP1 2.0 0.05 4.0 0.85 mA 2 150 2.8 4.1 180 4 4.5 V V mV mA VS_HIGH 16.5 17 18.5 V VS2_LOW 5.5 0.22 6.0 0.35 6.5 6.6 0.5 V VSUP1/VSUP2 VSUP1/VSUP2 VS1_LOW 5.5 0.22 6.0 0.35 6.5 6.6 0.5 5.5 4.0 27 5.5 V V V Symbol Min Typ Max Unit
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic Notes 5. All parameters in spec (ex: VDD regulator tolerance). 6. 7. Device functional, some parameters could be out of spec. VDD is active, device is not in Reset Mode if the lowest VDD under-voltage reset threshold is selected (approx. 3.4 V). CAN and I/Os are not operational. In Run Mode, CAN interface in Sleep Mode, 5 V-CAN and VAUX turned off. IOUT at VDD < 50 mA. Ballast: turned off or not connected. Symbol Min Typ Max Unit
VDD VOLTAGE REGULATOR, PIN VDD Output Voltage VSUP 5.5 to 27 V, IOUT 0 to 100 mA VSUP 5.5 to 27 V, IOUT 100 to 150 mA VSUP 5.5 to 27 V, IOUT 0 to 150 mA Drop voltage without external PNP pass transistor IOUT = 100 mA IOUT = 150 mA Drop voltage with external transistor IOUT = 200 mA (I_BALLAST + I_INTERNAL) External ballast versus internal current ratio (I_BALLAST = K x Internal current) Output Current limitation, without external transistor Temperature prewarning (guaranteed by design) Thermal shutdown (guaranteed by design) Range of decoupling capacitor (guaranteed by design) Low Power Mode VDD ON, output voltage -5.0 V, IOUT 50 mA (time limited) 5.6 V VSUP 27 V Low Power Mode VDD ON, dynamic output current capability (Limited duration. Ref to device description). Low Power VDD ON Mode: - Over-current wake-up threshold. - Hysteresis Low Power Mode VDD ON, drop voltage, at IOUT =30 mA (Limited duration. Ref to device description). Low Power Mode VDD ON, min VSUP operation (Below this value, a VDD, under-voltage reset may occur) VDD when Vsup < Vsup-th1, at I_VDD <= 10uA (guaranteed by design) VDD when Vsup >= Vsup-th1, at I_VDD <= 40mA (guaranteed with parameter Vsup-th1 LP-VDROP LP-MINVS VDD_off VDD_start up 3.0 LP-IOUTDC LP-ITH 1.0 0.1 5.5 3.0 1.0 200 400 0.3 mV V V V K ILIM TPW TSD CEXT VDDLP5 4.75 5.0 5.25 50 mA mA VDROP-B 1.5 150 160 4.7 350 2.0 350 140 500 2.5 550 100 mA C C F V VDROP 330 450 500 mV VOUT-5 4.9 4.9 5.0 5.0 5.0 5.1 5.1 mV V
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic VOLTAGE REGULATOR FOR CAN INTERFACE SUPPLY, PIN 5 V-CAN Output voltage, VSUP2 = 5.5 to 40 V IOUT 0 to 80 mA IOUT 80 to 200 mA Output Current limitation Under-voltage threshold Thermal shutdown (guaranteed by design) External capacitance (guaranteed by design)
(10) (8)
Symbol
Min
Typ
Max
Unit
5V-C OUT 4.75 4.75 5V-C ILIM 5V-C UV 5V-C TS CEXT-CAN 160 4.1 160 1.0 5.0 5.0 280 4.5 5.25 5.25 4.7 100
V
mA V C F
V AUXILIARY OUTPUT, 5 V AND 3.3 V SELECTABLE PIN VB-AUX, VC-AUX, VAUX(9) VAUX output voltage, VSUP = VSUP2 5.5 to 40 V, IOUT 0 to 150 mA VAUX output voltage, VSUP = VSUP2 5.5 to 40 V, IOUT 0 to 150 mA VAUX under-voltage detector (5.0 V) - Low Threshold - Hysteresis VAUX under-voltage detector (5 and 3.3V versions) VAUX over-current threshold detector Vaux set to 3.3V Vaux set t 5.0V External capacitance (guaranteed by design) UNDERVOLTAGE RESET AND RESET FUNCTION, RST PIN VDD under-voltage threshold down - 90% VDD (VDD 5.0 V)(11), (13) VDD under-voltage threshold up - 90% VDD (VDD 5.0 V) VDD under-voltage reset threshold down - 70% VDD (VDD 5.0 V)(12), (13) Hysteresis for threshold 90% VDD, 5.0 V device for threshold 70% VDD, 5.0 V device VDD under-voltage reset threshold down - Low Power VDD ON Mode (note: device change to Normal Request Mode). Reset VOL @ 1.5 mA, VSUP 2.5 to 40 V Current limitation, Reset activated, VRESET = 0.9 x VDD Pull-up resistor (to VDD pin) VSUP to guaranteed reset low level(14) Notes 8. 9. 10. 11. 12. 13. 14. VOL IRESET LOW IPULL-UP VSUP-RSTL 2.5 8.0 2.5 300 7.0 11 500 10 15 mV mA k V RST-LP RST-TH2-5 RST-HYST 20 10 4.0 4.5 150 150 4.85 V RST-TH1-5 4.5 2.95 4.65 3.2 4.85 4.90 3.45 V mV V Vaux cap VAUX-UVTH3 VAUX-ILIM 250 230 2.2 360 330 450 430 100 F VAUX5 VAUX3 VAUX-UVTH5 4.2 0.06 2.75 4.5 3.0 4.70 0.12 3.2 V mA 4.75 3.2 5.0 3.3 5.25 3.4 V V V
The regulator is stable without external capacitor. Usage of external capacitor recommended for AC performance. No external capacitor required for stability. External capacitor might be used to improve AC transient response. Current limitation will report into a flag. Generate a reset or an INT. SPI programmable Generate a reset In Run Mode Reset must be maintained low
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic Symbol Min Typ Max Unit
UNDERVOLTAGE RESET AND RESET FUNCTION, RST PIN (CONTINUED) Reset input threshold Low threshold High threshold Reset input hysteresis I/O PINS WHEN FUNCTION SELECTED IS OUTPUT I/O-0 high side switch drop @ I = -12 mA, VSUP = 10.5 V I/O-2 and I/O-3 high side switch drop @ I = -20 mA, VSUP = 10.5 V I/O-1, high side switch drop @ I = -400 A, VSUP = 10.5 V I/O-0, I/O-1 low side switch drop @ I = 400 A, VSUP = 10.5 V Leakage current I/O PINS WHEN FUNCTION SELECTED IS INPUT Negative threshold Positive threshold Hysteresis Input current I/O-0 and I/O-1 input resistor. /O_0 (or I/O-1) selected in MUX register, 2.0 V < Vi/o_x <16 V (guaranteed by design). VSENSE INPUT VSENSE under-voltage threshold (Not active in Low Power Modes) - Low Threshold - High threshold - Hysteresis Input resistor to GND. In all modes except in Low Power modes. (guaranteed by design). ANALOG MUX OUTPUT Output Voltage Range, with external resistor to GND >2.0 k Internal pull-down resistor for regulator output current sense External capacitor at MUX OUTPUT(15) (guaranteed by design) Chip temperature sensor coeff (guaranteed by design and device characterization) Chip temperature: MUX-OUT voltage at TA = 25C, guaranteed by design and characterization. Chip temperature: MUX-OUT voltage at TA = 125C Gain for VSENSE, with external 1.0 k 1% resistor Offset for VSENSE, with external 1.0 k 1% resistor Divider ratio for VSUP1 Divider ratio for I/O-0 and I/O-1 actual voltage - with attenuation selected (MUX-OUT register bit 3 set to 1); VSUP= 16V VSUP= 27V - with gain selected (MUX-OUT register bit 3 set to 0) Notes 15. When C is higher than CMUX, a serial resistor must be inserted 3.8 3.75 4.0 3.95 2.0 4.2 4.15 VOUT_MAX RMI CMUX TEMP-COEFF VTEMP VTEMP VSENSE GAIN VSENSE OFFSET VSUP1 RATIO VI/O RATIO 0.0 0.8 20 1.5 3.6 5.13 -20 5.335 1.9 21 1.65 3.75 5.48 5.5 VDD - 0.5 2.8 1.0 22 1.8 3.9 5.67 20 5.665 mV V k nF mv/C V V VSENSE_R VSENSE_TH 8.1 0.1 8.6 0.25 125 9.0 9.1 0.5 k V I/O-NTH I/O-PTH I/O-HYST I/O-IN RI/O-X 1.4 2.1 0.2 -5.0 2.0 3.0 1.0 1.0 100 2.9 3.8 1.4 5.0 V V V A k I/O-0 HSDRP I/O-2-3 HSDRP I/O-1 HSDRP I/O-0-1 LSDRP I/O-LEAK 0.5 0.5 0.4 0.4 0.1 1.4 1.4 1.4 1.4 3.0 V V V V A HYST RST-VTH 1.5 2.5 0.5 1.9 3.0 1.0 2.2 3.5 1.5 V V
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic ANALOG MUX OUTPUT (CONTINUED) Internal reference voltage Current ratio between VDD output & IOUT at MUX-OUT (IOUT at MUX-OUT = IDD out / IDD_RATIO) - At IOUT = 50 mA - I_OUT from 25 mA to 150 mA SAFE OUTPUT SAFE low level, at I = 500 A Safe leakage current (VDD low, or device unpowered). VSAFE 0 to 27 V. INTERRUPT Output low voltage, IOUT = 1.5 mA Pull-up resistor Output high level in Low Power VDD ON Mode (guaranteed by design) Leakage current INT voltage = 10 V (to allow high-voltage on MCU INT pin) Sink current, VINT > 5.0 V, INT low state MISO, MOSI, SCLK, CS PINS Output low-voltage, IOUT = 1.5 mA (MISO) Output high-voltage, IOUT = -0.25 mA (MISO) Input low voltage (MOSI, SCLK,CS) Input high-voltage (MOSI, SCLK,CS) Tri-state leakage current (MISO) Pull-up current (CS) CAN LOGIC INPUT PINS (TXD) High Level Input Voltage Low Level Input Voltage Pull-up Current, TXD, VIN = 0 V CAN DATA OUTPUT PINS (RXD) Low Level Output Voltage IRXD = 5.0 mA High Level Output Voltage IRXD = -3.0 mA High Level Output Current VRXD = VDD - 0.4 V Low Level Input Current VRXD = 0.4 V IOUTLOW 2.5 5.0 9.0 mA IOUTHIGH 2.5 5.0 9.0 mA VOUTHIGH 0.7 x VDD VDD V VOUTLOW 0.0 0.3 x VDD V VIH VIL IPDWN 0.7 x VDD -0.3 -850 -650 VDD + 0.3 0.3 x VDD -200 V V A VOL VOH VIL VIH IHZ IPU VDD -0.9 0.7 x VDD -2.0 200 370 0.3 x VDD 2.0 500 1.0 V V V V A A VOL RPU
VOH-LPVddon
Symbol
Min
Typ
Max
Unit
VREF IDD_RATIO
2.425
2.5
2.575
V
80 62.5
97 97
115 117
VOL VSAFE-IN
0.0 -
0.2 0.0
1.0 1.0
V A
6.5 3.9 2.5
0.2 10 4.3 35 6.0
1.0 14
V k V
VMAX I SINK
100 10
A
mA
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic CAN OUTPUT PINS (CANH, CANL) Bus pins common mode voltage for full functionality Differential input voltage threshold Differential input hysteresis Input resistance Differential input resistance Input resistance matching CANH output voltage (45 < RBUS < 65 ) TX dominant state TX recessive state CANL output voltage (45 < RBUS < 65 ) TX dominant state TX recessive state Differential output voltage (45 < RBUS < 65 ) TX dominant state TX recessive state CAN H output current capability - Dominant state CAN L output current capability - Dominant state CANL over-current detection - Error reported in register CANH over-current detection - Error reported in register CANH, CANL input resistance to gnd, device supplied, CAN in Sleep Mode, V_CANH, V_CANL from 0 to 5.0 V CANL, CANH output voltage in Low Power VDD OFF and Low Power VDD ON Modes CANH, CANL input current, VCANH, VCANL = 0 to 5V, device not supplied (Vsup, Vdd, 5V-CAN: open, direct connection to gnd, connect to gnd via 47k resistor). CANH, CANL input current, VCANH, VCANL = -2 to 7V, device not supplied (Vsup, Vdd, 5V-CAN: open, direct connection to gnd, connect to gnd via 47k resistor). Differential voltage for recessive bit detection in LP mode(16) Differential voltage for dominant bit detection in LP mode(16) CANH AND CANL DIAGNOSTIC INFORMATION CANL to GND detection threshold CANH to GND detection threshold CANL to VBAT detection threshold, VSUP1 and VSUP2 > 8.0 V CANH to VBAT detection threshold, VSUP1 and VSUP2 > 8.0 V CANL to VDD detection threshold CANH to VDD detection threshold Notes 16. Guaranteed by design and device characterization. VLG VHG VLVB VHVB VL5 VH5 1.6 1.6 4.0 4.0 1.75 1.75 VSUP -2.0 VSUP -2.0 VDD -0.43 VDD -0.43 2.0 2.0 V V V V V V ICANH ICANL ICANL-OC ICANH-OC RINSLEEP VCANLP ICAN-UN_SUP1 VOH-VOL 1.5 -0.5 30 75 -195 5.0 -0.1 2.0 0.0 120 -120 0.0 3.0 3.0 0.05 -30 195 -75 50 0.1 10 mA mA mA mA k V A VCANL 0.5 2.0 1.5 2.5 2.25 3.0 V VCOM VCANH-VCANL VDIFF-HYST RIN RIN-DIFF RIN-MATCH VCANH 2.75 2.0 3.5 2.5 4.5 3.0 V -12 500 50 5.0 10 -3.0 0.0 12 900 50 100 3.0 V mV mV k k % V Symbol Min Typ Max Unit
ICAN-UN_SUP2
-
-
250
A
VDIFF-R-LP VDIFF-D-LP
1.15
-
0.4 -
V V
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic SPLIT Output voltage Loaded condition ISPLIT = 500 A Unloaded condition Rmeasure > 1.0 M Leakage current -12 V < VSPLIT < +12 V -22 to -12 V < VSPLIT < +12 to +35 V LIN TERM1, LIN TERM2 LIN-T1, LIN-T2, high side switch drop @ I = -20 mA, VSUP > 10.5 V Operating Voltage Range Supply Voltage Range Current Limitation for Driver Dominant State Driver ON, VBUS = 18 V Input Leakage Current at the receiver Driver off; VBUS = 0V; VBAT = 12 V Leakage Output Current to GND Driver Off; 8.0 V < VBAT < 18 V; 8.0 V < VBUS < 18 V; VBUS VBAT Control unit disconnected from ground (Loss of local ground must not affect communication in the residual network) GNDDEVICE = VSUP; VBAT = 12 V; 0 < VBUS < 18 V (guaranteed by design) VBAT Disconnected; VSUP_DEVICE = GND; 0 < VBUS < 18 V (Node has to sustain the current that can flow under this condition. Bus must remain operational under this condition) Receiver Dominant State Receiver Recessive State Receiver Threshold Center (VTH_DOM + VTH_REC)/2 Receiver Threshold Hysteresis (VTH_REC - VTH_DOM) LIN Wake-up threshold from Low Power VDD ON or Low Power VDD OFF Mode LIN Pull-up Resistor to VSUP Over-temperature Shutdown (guaranteed by design) Over-temperature Shutdown Hysteresis (guaranteed by design) VBUSWU RSLAVE TLINSD TLINSD_HYS VHYS 20 140 5.3 30 160 10 0.175 5.8 60 180 V k C C IBUSNO_BAT VBUSDOM VBUSREC 0.6 VBUS_CNT 0.475 0.5 0.525 VSUP VSUP 0.4 VSUP 100 VSUP A IBUS_NO_GND -1.0 1.0 IBUS_PAS_REC 20 mA IBUS_PAS_DOM -1.0 A LT_HSDRP 1.0 1.4 V LIN1 AND LIN 2 MC33905D PIN - LIN1 MC33905S PIN (Parameters guaranteed for VSUP1, VSUP2 7 V VSUP 18 V) VBAT VSUP IBUS_LIM 40 90 200 mA 8.0 7.0 18 18 V V mA ILSPLIT 0.0 5.0 200 VSPLIT 0.3 x VDD 0.45 x VDD 0.5 x VDD 0.5 x VDD 0.7 x VDD 0.55 x VDD A V Symbol Min Typ Max Unit
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, GND = 0 V, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic SPI TIMING SPI operation frequency (MISO cap = 50 pF) SCLK Clock Period SCLK Clock High Time SCLK Clock Low Time Falling Edge of CS to Rising Edge of SCLK Falling Edge of SCLK to Rising Edge of CS MOSI to Falling Edge of SCLK Falling Edge of SCLK to MOSI MISO Rise Time (CL = 50 pF) MISO Fall Time (CL = 50 pF) Time from Falling to MISO Low-impedance Time from Rising to MISO High-impedance Time from Rising Edge of SCLK to MISO Data Valid Delay between rising and falling edge on CS CS low timeout detection SUPPLY, VOLTAGE REGULATOR, RESET VSUP under-voltage detector threshold deglitcher Rise time at turn ON. VDD from 1.0 to 4.5 V. 2.2 F at VDD pin. Deglitcher time to set reset pin low RESET PULSE DURATION VDD under-voltage (SPI selectable) short, default at power on when BATFAIL bit set medium medium long long Watchdog reset VSENSE INPUT Under-voltage deglitcher time INTERRUPT INT pulse duration (refer to SPI for selection. Guaranteed by design) short long INT-PULSE 20 90 25 100 35 130 s BFT 30 100 s RST-WD RST-PULSE 0.9 4.0 8.5 17 0.9 1.0 5.0 10 20 1.0 1.4 6 12 24 1.4 ms ms VS_LOW1/
2_DGLT
Symbol
Min
Typ
Max
Unit
FREQ tPCLK tWSCLKH tWSCLKL tLEAD tLAG tSISU tSIH tRSO tFSO tSOEN tSODIS tVALID D2CS CS-TO
0.25 250 125 125 30 30 30 30 1.0 2.5
-
4.0 N/A N/A N/A N/A N/A N/A N/A 30 30 30 30 30 -
MHz ns ns ns ns ns ns ns ns ns ns
ns s ms
30 50 20
50 250 30
100 800 40
s s s
tRISE-ON RST-DGLT
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, GND = 0 V, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic STATE DIGRAM TIMINGS Delay for SPI Timer A, Timer B or Timer C write command after entering Normal Mode (No command should occur within Td_nm. TD_NM delay definition: from CS rising edge of "Go to Normal Mode" command to CS falling edge of "Timer write" command) Tolerance for: W/D period in all modes, FWU delay, Cyclic sense period and active time, Cyclic Interrupt period, LP mode over current (unless otherwise noted)(20) CAN DYNAMIC CHARACTERISTICS TXD Dominant State Timeout Bus dominant clamping detection Propagation loop delay TXD to RXD, recessive to dominant (Fast slew rate) Propagation delay TXD to CAN, recessive to dominant Propagation delay CAN to RXD, recessive to dominant Propagation loop delay TXD to RXD, dominant to recessive (Fast slew rate) Propagation delay TXD to CAN, dominant to recessive Propagation delay CAN to RXD, dominant to recessive Loop time TXD to RXD, Medium Slew rate (Selected by SPI) Rec to Dom Dom to Rec Loop time TXD to RXD, Slow Slew rate (Selected by SPI) Rec to Dom Dom to Rec CAN wake up filter time, single dominant pulse (See Figure 29) CAN wake up filter time, 3 dominant pulses detection(18) CAN wake up filter time, 3 dominant pulses detection time (See Figure 30) Notes 17. No wake up for single pulse shorter than tCAN-WU1 min. Wake up for single pulse longer than tCAN-WU1 max. 18. 19. 20. Each pulse should be greater than tCAN-WU3-F min. Guaranteed by design, and device characterization. The 3 pulses should occur within tCAN-WU3-TO. Guaranteed by design, and device characterization. Guaranteed by design. out(19) tCAN-WU3-F tCAN-WU3-TO 300 120 ns s detection(17) tCAN-WU1 tLOOP-SSL 0.5 300 300 2.0 5.0 s tDOUT tDOM tLRD tTRD tRRD tLDR tTDR tRDR tLOOP-MSL 200 200 ns 300 300 60 100 600 600 120 70 45 120 75 50 1000 1000 210 110 140 200 150 140 s s ns ns ns ns ns ns ns tTIMING-ACC -10 10 % tD_NM 60 s Symbol Min Typ Max Unit
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 5.5 V VSUP 27 V, - 40C TA 125C, GND = 0 V, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25C under nominal conditions, unless otherwise noted.
Characteristic Symbol Min Typ Max Unit
LIN 1 AND LIN 2 PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR NORMAL SLEW RATE - 20.0 KBIT/SEC ACCORDING TO LIN PHYSICAL LAYER SPECIFICATION Bus load RBUS and CBUS 1.0 nF / 1.0 k, 6.8 nF / 660 , 10 nF / 500 . See Figure 13, page 25. Duty Cycle 1: THREC(max) = 0.744 * VSUP THDOM(max) = 0.581 * VSUP D1 = tBUS_REC(MIN)/(2 x tBIT), tBIT = 50 s, 7.0 V VSUP 18 V Duty Cycle 2: THREC(MIN) = 0.422 * VSUP THDOM(MIN) = 0.284 * VSUP D2 = tBUS_REC(MAX)/(2 x tBIT), tBIT = 50 s, 7.6 V VSUP 18 V 0.581 0.396 -
D1
D2
LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR SLOW SLEW RATE - 10.4 KBIT/SEC ACCORDING TO LIN PHYSICAL LAYER SPECIFICATION Bus load RBUS and CBUS 1.0 nF / 1.0 k, 6.8 nF / 660 , 10 nF / 500 . Measurement thresholds. See Figure 14, page 26. Duty Cycle 3: THREC(MAX) = 0.778 * VSUP THDOM(MAX) = 0.616 * VSUP D3 = tBUS_REC(MIN)/(2 x tBIT), tBIT = 96 s, 7.0 V VSUP 18 V Duty Cycle 4: THREC(MIN) = 0.389 * VSUP THDOM(MIN) = 0.251 * VSUP D4 = tBUS_REC(MAX)/(2 x tBIT), tBIT = 96 s, 7.6 V VSUP 18 V LIN PHYSICAL LAYER: DRIVER CHARACTERISTICS FOR FAST SLEW RATE LIN Fast Slew Rate (Programming Mode) SRFAST 20 V / s 0.590 0.417 -
D3
D4
LIN PHYSICAL LAYER: CHARACTERISTICS AND WAKE-UP TIMINGS VSUP from 7.0 to 18 V, bus load RBUS and CBUS 1.0 nF / 1.0 k, 6.8 nF / 660 , 10 nF / 500 . See Figure 13, page 25. Propagation Delay and Symmetry (See Figure 13, page 25 and Figure 14, page 26) Propagation Delay of Receiver, tREC_PD=MAX (tREC_PDR, tREC_PDF) Symmetry of Receiver Propagation Delay, tREC_PDF - tREC_PDR Bus Wake-Up Deglitcher (Low Power VDD OFF and Low Power VDD ON Modes) (See Figure 15, page 25 for Low Power VDD OFF Mode and Figure 16, page 26 for Low Power Mode) Bus Wake-up Event Reported From Low Power VDD OFF Mode From Low Power VDD ON Mode s s
t REC_PD t REC_SYM t PROPWL
- 2.0
4.2 -
6.0 2.0 s
42
70
95
t WAKE_LPVDD
OFF
1.0
-
1500 12
t WAKE_LPVDD
ON
TXD Permanent Dominant State Delay (guaranteed by design)
t TXDDOM
0.65
1.0
1.35
s
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ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS
TIMING DIAGRAMS
TPCLK
CS
TLEAD TWCLKH TLAG
SCLK
TWCLKL TSISU TSIH
MOSI
Undefined
TVALID TSOEN
Di 0
Don't Care
Di n
Don't Care
TSODIS
MISO
Do 0
Do n
Figure 9. SPI Timings
TXD 0.3 x VDD RXD
TLRD 0.7 x VDD TLDR 0.7 x VDD 0.3 x VDD
Figure 10. CAN Signal Propagation Loop Delay TXD to RXD
TXD 0.3 x VDD VDIFF
TTRD 0.7 x VDD TTDR 0.9V TRRD 0.5V TRDR 0.7 x VDD 0.3 x VDD
RXD
Figure 11. CAN Signal Propagation Delays TXD to CAN and CAN to RXD
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ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS
.
12 V 10 F VSUP VDD 100 nF 2.2 F
33905
CANH Signal generator TXD CANL RXD 15 pF GND SPLIT
RBUS 60
CBus 100 pF
All pins are not shown
Figure 12. Test Circuit for CAN Timing Characteristics
TXD tBIT tBIT
VLIN_REC
THREC(MAX) THDOM(MAX) 74.4% VSUP 58.1% VSUP
tBUS_DOM(MAX)
tBUS_REC(MIN) Thresholds of receiving node 1
LIN
THREC(MIN) THDOM(MIN) 42.2% VSUP 28.4% VSUP
Thresholds of receiving node 2
tBUS_DOM(MIN)
tBUS_REC(MAX)
RXD
Output of receiving Node 1 tREC_PDF(1) tREC_PDR(1)
RXD
Output of receiving Node 2 tREC_PDR(2) tREC_PDF(2)
Figure 13. LIN Timing Measurements for Normal Slew Rate
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ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS
TXD tBIT tBIT
VLIN_REC
THREC(MAX) THDOM(MAX) 77.8% VSUP 61.6% VSUP
tBUS_DOM(MAX)
tBUS_REC(MIN) Thresholds of receiving node 1
LIN
THREC(MIN) THDOM(MIN) 38.9% VSUP 25.1% VSUP
Thresholds of receiving node 2
tBUS_DOM(MIN)
tBUS_REC(MAX)
RXD
Output of receiving Node 1 tREC_PDF(1) tREC_PDR(1)
RXD
Output of receiving Node 2 tREC_PDR(2) tREC_PDF(2)
Figure 14. LIN Timing Measurements for Slow Slew Rate
V REC
LI N
0. V SU P 4
V BU S W U
D om i nantl evel
VD D
3V
T PR O PW L
T W AKE
Figure 15. LIN Wake-up Low Power VDD OFF Mode Timing
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Analog Integrated Circuit Device Data Freescale Semiconductor
ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS
V LI _REC N
LI N
0. V SU P 4
V BU S W U
D om i nantl evel
IQ R
T PROPWL
T W AKE
I Q st l untlSPIr R ays ow i eadi com m and ng
Figure 16. LIN Wake-up Low Power VDD ON Mode Timing
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FUNCTIONAL DESCRIPTION INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The MC33904_5 is the second generation of System Basis Chip, combining: - Advanced power management unit for the MCU, the integrated CAN interface and for additional ICs such as sensors, CAN transceiver. - Built in enhanced high speed CAN interface (ISO118982 and -5), with local and bus failure diagnostic, protection and fail safe operation mode. - Built in LIN interface, compliant to LIN 2.1 and J2602-2 specification, with local and bus failure diagnostic and protection. - Innovative and hardware configurable fail safe state machine solution. - Multiple low power modes, with low current consumption. - Family concept; with and without LIN interface devices with pin compatibility.
FUNCTIONAL PIN DESCRIPTION POWER SUPPLY (VSUP1 AND VSUP2)
VSUP1 pin is the input pin for the device internal supply and the VDD regulator. VSUP2 is the input pin for the 5VCAN regulator, LINs interfaces and I/O functions. The VSUP block includes over and under-voltage detections which can generate interrupt. The device includes a loss of battery detector connected to VSUP1. Loss of battery is reported through a bit (called BATFAIL). This generates a POR (Power On Reset).
EXTERNAL TRANSISTOR Q1 (VE AND VB)
The device has a dedicated circuit to allow usage of an external P type transistor, with the objective to share the power dissipation between the internal transistor of the VDD regulator and the external transistor. The bipolar PNP recommended transistor are MJD42C or BCP52-16. When the external PNP is connected, the current is shared between the internal path transistor and the external PNP, with the following typical ratio: 1/3 in the internal transistor and 2/3 in the external PNP. The PNP activation and control is done by SPI. The device is able to operate without an external transistor. In this case the VEM and VB pins must remain open.
VDD VOLTAGE REGULATOR (VDD)
The regulator has two main modes of operation (Normal Mode and Low Power Mode). It can operate with or without an external PNP transistor. In Normal Mode, without external PNP, the max DC capability is 150mA. Current limitation, temperature pre warning flag and over temperature shutdown features are included. When VDD is turned ON, rise time from 0 to 5.0V is controlled. Output voltage is 5.0V. A 3.3V option is available via dedicated part number. If current higher than 150mA is required, an external PNP transistor must be connected to VEM (PNP emitter) and VB (PNP base) terminals, in order to increase total current capability and share the power dissipation between internal VDD transistor and the external transistor. See External Transistor Q1 (VE and VB). The PNP can be used even if current is less than 150mA, depending upon ambient temperature, maximum supply and thermal resistance. Typically, above 100-200mA, an external ballast transistor is recommended.
VOLTAGE REGULATOR FOR CAN INTERFACE SUPPLY (5V-CAN)
This regulator is supplied from the VSUP2 pin. A capacitor is required at 5V-CAN terminal. Analog MUX and part of the LIN interfaces are supplied from 5V-CAN. 5V-CAN regulator is OFF by default and must be turn ON by SPI. In Debug mode 5V-CAN is ON be default.
V AUXILIARY OUTPUT, 5V AND 3.3V SELECTABLE (VB-AUX, VC-AUX, AND VCAUX) - Q2
The VAUX block is used to provide an auxiliary voltage output, 5 or 3.3V, selectable by the SPI. It uses an external PNP pass transistor for flexibility and power dissipation constraints. The external recommended bipolar transistors are MJD42C or BCP52-16. An over-current and under voltage detectors are provided. VAUX is controlled via the SPI, and can be turned ON or OFF. VAUX low threshold detection and over-current information will disable Vaux, and flags are reported in the SPI and can generate INT. Vaux is OFF by default and must be turned ON by SPI.
VDD REGULATOR IN LOW POWER MODE
When the device is set in Low Power VDD ON Mode, the VDD regulator is able to supply the MCU with a DC current below typ 1.5mA (LP-ITH). Transient current can also be supplied up to tenth of mA. Current in excess of 1.5mA is detected, and this event is managed by the device logic (wake-up detection, timer start for over current duration monitoring or watchdog refresh).
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FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION
UNDER-VOLTAGE RESET AND RESET FUNCTION (RST)
The RESET pin is an open drain structure with an internal pull-up current source. The low side driver has limited current capability when asserted low, in order to tolerate a short to 5.0V.The Reset terminal voltage is monitored in order to detect failure (e.g. RESET pin shorted to 5.0V or GND). The RESET pin reports to the MCU under -voltage condition at the VDD pin, as well as failure in watchdog refresh operation. VDD under-voltage reset operate also in Low Power VDD ON Mode. Two VDD under-voltage threshold are included. The upper on (typ 4.65V, RST-TH1-5) can lead to a Reset or an Interrupt. This is selected by the SPI. When "RST-TH2-5"is selected, in Normal Mode, an INT is asserted when VDD falls below "RSTTH1-5". This will allow the MCU to operate in a degraded mode, for example, with 4.0V VDD.
capacitor to gnd. It incorporates a threshold detector to sense the battery voltage and provide a battery early warning. It also includes a resistor divider to measure the VSENSE voltage via the MUX OUT pin.
MUX OUTPUT (MUXOUT)
The MUX-OUT terminal (Figures 17) delivers an analog voltage to the MCU A/D input. The voltage to be delivered to MUX-OUT is selected via the SPI, from one of the following functions: Vsup1, Vsense, I/O-0, I/O-1, Internal 2.5V reference, die temperature sensor, VDD current copy. Voltage divider or amplifier are inserted in the chain, as shown in Figures 17. For the VDD current copy, a resistor must be added to the MUX OUT pin, to convert current into voltage. Device includes an internal 2k resistor selectable by SPI. Voltage range at MUX_OUT is from gnd to VDD. It is automatically limited to VDD (max 3.3V for 3.3V part numbers). The MUX-OUT buffer is supplied from 5V-CAN regulator, so the 5V-CAN regulator must be ON in order to have: 1) MUX-OUT functionality and 2) SPI selection of the analog function. If 5V-CAN is OFF, MUX-OUT voltage is near gnd and the SPI command that selects one of the analog input is ignored. Delay must be respected between SPI commands for 5VCAN turn ON and SPI to select MUX-OUT function. The delay depends mainly upon the 5V-CAN capacitor and load on 5V-CAN. The delay can be estimated using the following formula: delay = C(5V-CAN) x U (5V) / I_lim 5V-CAN. C = cap at 5V-CAN regulator, U = 5V, I_lim 5V-CAN = min current limit of 5V-CAN regulator (parameter 5V-C ILIM).
I/O PINS (I/O-1: I/O-3)
I/O s are configurable input output pins. They can be used for small load or to drive external transistors. When used as output drivers, the I/Os are high side or low side type. They can also be set to high-impedance. I/Os are controlled by SPIn and at power on, the I/Os are set as inputs. They include over load protection by temperature or excess of drop voltage. In Low Power Mode, state of the I/O can be turned on or off, with extremely low extra consumption (except load). Protection is disabled in low power mode. When cyclic sense is used, I/O-0 is the high side/low side switch, I/O-1, 2 and 3 and the wake inputs. I/O-2 and I/O-3 terminals share also the LIN Master terminal function.
VSENSE INPUT (VSENSE)
This pin can be connected to the battery line (before the reverse battery protection diode), via a serial resistor and a
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FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION
VBAT D1
VSUP_1 VSENSE
RSENSE 1k
S_in Multiplexer S_in S_iddc
VDD-I_COPY
5V-CAN
5V-CAN
MCU MUX-OUT A/D in RMI S_ir RM(*) (*)Optional
I/O-0
S_in
buffer S_g3.3
S-i/o_att
I/O-1
S_g5
S_in Temp Vref: 2.5V S-i/o_att
All swicthes and resistor are configured and controlled via the SPI. RM: internal resistor connected when VREG current monitor is used. S_g3.3 and S_g5 for 5.0V or 3.3V MCU. S_iddc to select VDD regulator current copy. S_in1 for Low Power Mode resistor bridge disconnection. S_ir to switch on/off of the internal RMI resistor.
Figure 17. Analog Multiplexer Block Diagram
DGB (DGB) AND DEBUG MODE
The DBG pin has 2 functions: Primary function: It is an output used to set the device in Debug Mode. This is achieved by applying a voltage between 8V and 10V, at the debug terminal, and then powering up the device (ref to state diagram). When device leaves the INIT reset mode and enter in INIT mode, device detects that voltage at debug terminal is within the 8-10V range, and activate the debug mode. When debug mode is detected, no watchdog SPI refresh commands is necessary. This allow easy debug of the hardware and software routines (i.e SPI commands). Device is in debug mode is reported by SPI flag. While in de bug mode, when voltage at DBG terminal falls below the 8-10V range, the debug mode is left, and device start W/D operation, and expect proper W/D refresh.Debug mode can be left by SPI. Such command is recommended to avoid staying in debug mode in case of unwanted debug mode selection (pin FMEA). SPI command to leave debug has higher priority than providing 8-10V at debug pin. Secondary function: The resistor connected between DBG pin and gnd selects the Fail Safe Mode operation. DBG pin can also be connected directly to gnd (this prevent usage of debug mode).
Flexibility is provided to the user to select SAFE output operation via a resistor at the DBG pin or via SPI command. The SPI command has higher priority than the hardware selection via Debug resistor. When the Debug mode is selected, the SAFE modes can not be configured via the resistor connected at DBG pin.
SAFE
Safe output terminal This pin is an output which is asserted low in case a fault event occurs. The objective is to drive electrical safe circuitry and set the ECU in a know sate independent of the MCU and SBC, once a failure has been detected. The SAFE output structure is an open drain, without a pullup. No current flow is allowed when SAFE is forced externally to a high-voltage (< 40V).
INTERRUPT (INT)
The INT output is asserted low or generate a low pulse when an interrupt condition occurs. The INT condition is enabled in the INT register. The selection of low level or pulse as well as pulse duration are selected by SPI. No current will flow inside the INT structure when VDD is low, in Low Power VDD OFF Mode. This allows the connection of an external pull resistor, and connection of an INT pin from other ICs without extra consumption in unpowered mode.
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FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION
INT has internal pull up structure to VDD. In Low Power VDD ON Mode, a diode is inserted in series with the pull up, so the high level is slightly lower than in other modes.
CANH, CANL, SPLIT, RXD, TXD
These are the terminals of the high speed CAN physical interface, between the CAN bus and the micro controller. A detail description is provided in the document.
LIN, TXDL, RXDL AND LINTERM
These are the terminals of the Local Interconnect Network physical interface. Device contains zero, one or two LIN interfaces.
MC33904 has no LIN interface. MC33905S (S as Single) and MC33905D (D as Dual) contain respectively 1 and 2 LIN interfaces. LIN 1 and LIN 2 terminals are the connection to the LIN sub buses. LIN interfaces are connected to the MCU via the TxDL1 (TxDL2) and RxDL1 (RxDL2) terminals. The device also include one or two high side switches to Vsup2 terminal which can be used as a LIN master termination switch. Pins LINT-1 and LINT-2 are the same as I/O-2 and I/O-3. A detail description is provided in the document
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FUNCTIONAL DEVICE OPERATION MODE AND STATE DESCRIPTION
FUNCTIONAL DEVICE OPERATION
MODE AND STATE DESCRIPTION
The device has several operation modes. The transitions and conditions to enter or leave each modes are illustrated in the state diagram. 256ms when Normal Request mode is entered after RESET mode. Different duration can be selected by SPI for the case when normal request is entered from LP VDD ON mode. If the W/D refresh SPI command does not occur within the 256ms (or the shorter user defined time out), then the device will enter into RESET mode, for a duration of typ 1ms. note: in init reset, init, reset and normal request modes as well as in low power modes, the VDD external PNP is disabled.
INIT RESET
This mode is automatically entered after device "power on". In this mode, the RSTb pin is asserted low, for a duration of typ 1ms. Control bits and flags are "set" to their default reset condition. The BATFAIL is set to indicated that the device is coming from an unpowered condition, and that all previous device configuration are lost and "reset" the default value. The duration of the INIT reset is typ 1ms. INIT reset mode is also entered from INIT mode in case the expected SPI command does not occur in due time (ref. INIT mode), and if device is not in debug mode.
NORMAL
In this mode, all device functions are available. This mode is entered by a SPI W/D refresh command from Normal Request mode, or from INIT mode. During Normal mode, the device Watchdog function is operating, and a periodic W/D refresh must occurs. In case of incorrect or missing W/D refresh command device will enter into Reset mode. From Normal mode, the device can be set by SPI command into Low Power modes (Low Power VDD ON or Low Power VDD OFF Modes). Dedicated secured SPI commands must be used to enter from Normal mode in RESET mode, INIT mode or FLASH mode.
INIT
This mode is automatically entered from "INIT reset" mode. In this mode, the device must be configured via SPI within a time of 256ms max. Four registers called INIT Wdog, INIT REG, INIT LIN I/O and INIT MISC must be and can only be configured during INIT mode. Other registers can be written in this mode, however they can be also written in other modes. Once the INIT registers configuration is done, a SPI Watchdog Refresh command must be send in order to set the device into Normal mode. If the SPI W/D refresh does not occur within the 256ms period, the device will return into INIT reset mode for typ 1ms, and then re enter into INIT mode. Register read operation is allowed in INIT mode to collect device status or to read back the INIT register configuration When INIT mode is left by a SPI W/D refresh command, it is only possible to re enter the INIT mode using a secured SPI command.
FLASH
In this mode, the software watchdog period is extended up to typ 32 seconds. This allow programming of the MCU flash memory while minimizing the software over head to refresh the W/D. The flash mode is entered by Secured SPI command and is left by SPI command. Device will enter into RESET mode. In case of incorrect or missing W/D refresh command device will enter into Reset mode. An INT can be generated at 50% of the W/D period. CAN interface operates in Flash mode to allow flash via CAN bus, inside the vehicle.
RESET
In this mode, the RSTb pin is asserted low. Reset mode is entered from Normal mode, Normal Request mode, LP VDD on mode and from Flash mode, when the W/D is not triggered, or if a VDD low condition is detected. The duration of reset is typ 1ms by default. The user can defined a longer Reset pulse activation only for the case the reset mode is entered following a VDD low condition. Reset pulse is always 1ms, in case Reset mode in entered due to wrong W/D refresh command. Reset mode can be entered via secured SPI command.
DEBUG
Debug is a special operation mode of the device which allows system easy software and hardware debugging. The debug operation is detected after power up if the DBG pin is set in the 8.0-10V range. When debug is detected, all the software watchdog operations are disabled: 256ms of INIT mode, W/D refresh of Normal mode and Flash mode, Normal Request time out (256ms or user defined value) are not operating and will not lead to transition into INIT reset or Reset mode. When device is in Debug, SPI command can be send without any time constraints with respect to W/D operation, MCU program can be "halted" or "paused" to verify proper operation. Debug can be left by removing 8-10V from debug pin, or by SPI command (ref to MODE register). 5V-CAN regulator is ON by default in debug mode.
NORMAL REQUEST
This mode is automatically entered after RESET mode, or after a wake up from Low Power VDD ON Mode. A W/D refresh SPI command is necessary to transition to NORMAL mode. The duration of the Normal request mode is
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FUNCTIONAL DEVICE OPERATION LOW POWER MODES
LOW POWER MODES
The device has two main Low Power Modes: Low Power Mode with VDD off, and Low Power Mode with VDD on. note: Prior to enter in Low Power mode, I/O and CAN wake up flags must be cleared (ref to Mode register). The same wake-up events as in LP Vdd off mode (CAN, LIN, I/O, timer, cyclic sense) are available in LP Vdd on mode. In addition, two additional wake up conditions are available. * Dedicated SPI command. When device is in LP Vdd ON mode, the wake up by SPI command uses a write to "Normal Request Mode", 0x5C10. * Output current from Vdd exceeding typ 1.5mA threshold. In Low Power VDD ON Mode, the device is able to source several tenth of mA DC. The current source capability can be time limited, by a selectable internal timer. Timer duration is up to 32ms, and is triggered when the output current exceed the output current threshold typ 1.5mA. This allow for instance a periodic activation of the MCU, while the device remains in LP VDD on mode. If the duration exceed the selected time (ex 32ms), the device will detect a wake up. Wake up event are reported to the MCU via a low level pulse at INT pulse. The MCU will detect the INT pulse and resume operation. Watchdog function in LP VDD ON mode It is possible to enable the W/D function in Low Power VDD ON Mode. In this case, the principle is time out. Refresh of the W/D is done either by: * a dedicated SPI command (different from any other SPI command or simple CSb activation which would wake up - ref to above paragraph) * or by a temporary (less than 32ms max) Vdd over current wake-up (Idd > 1.5mA typ). As long as the W/D refresh occurs, the device remains in LP Vdd on mode. MODE transition mode transition are either done automatically (i.e after time out expired or voltage conditions), or via SPI command, or by external event such as wake up. Some mode change are performed via "secured" SPI commands.
LOW POWER - VDD OFF
In this mode, VDD is turned off and the MCU connected to VDD is unsupplied. This mode is entered by the SPI. It can also be entered by automatic transition due to fail safe management. 5V-CAN and Vaux regulators are also turned OFF. When the device is in Low Power VDD OFF Mode, it monitors external events to wake up and leave the LP mode. The wake up events can occurs from: * CAN * LIN interface, depending upon device part number * Expiration of an internal timer * I/O-0, and I/O-inputs, and depending upon device part number and configuration, I/O-2 and/or 3 input * Cyclic sense of I/O-1 input, associated by I/O-0 activation, and depending upon device part number and configuration, cyclic sense of I/O-2 and 3 input, associated by I/O-0 activation When a wake up event is detected, the device enters into reset mode and then into Normal Request mode. The wake up source are reported into the device SPI registers. In summary, a wake up event from LP Vdd off, lead to Vdd regulator turn ON, and MCU operation restart.
LOW POWER - VDD ON
In this mode, the voltage at the VDD terminal remains at 5.0V (or 3.3V, depending upon device part number). The objective is to maintain the MCU powered, with reduced consumption. In such mode, the DC output current is expected to be limited to few 100uA or few mA, as the ECU is in reduced power operation mode.
During this mode, the 5V-CAN and VAUX regulators are OFF.
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FUNCTIONAL DEVICE OPERATION STATE DIAGRAM
STATE DIAGRAM
VSUP fall
VSUP1 rise > VSUP-TH1 & VDD > VDD_UVTH
POWER DOWN
T_INIT expired or VDDINIT Reset
start T_IR (T_IR=1ms)
Debug Mode detection
VSUP fall
T_IR expired
FLASH
start T_WDF (config) Ext reset SPI secured or T_WDF expired or VDDINIT
start T_INIT (T_INIT=256ms)
SPI secured (3)
SPI write (0x5A00) (W/D refresh)
RESET
start T_R (1ms or config) Wake-up T_NR expired T_R expired & VDD>VDD_UVTH VDDNORMAL (4)
start T_WDN (T_WDN=config)
W/D refresh by SPI
SPI write (0x5A00) (W/D refresh)
NORMAL REQUEST
start T_NR (256ms or config) T_OC expired or Wake up Wake up (5)
SPI if enable W/D refresh by SPI
LOW POWER VDD ON
start T_WDL (2) I-DDLP VDDON IDD > 1.5mA
VDDI-DD>IOC (1.5mA)
T_WDL expired or VDDSPI
LOW POWER VDD OFF
(1) W/D refresh in closed window or enhanced W/D refresh failure (2) If enable by SPI, prior to enter LP VDD ON mode (3) Ref to "SPI secure" description (4) Vdd external PNP is disable in all mode except Normal and Flash modes. (5) Wake up from LP Vdd ON mode by SPI command is done by a SPI mode change: 0X5C10 FAIL SAFE DETECTED
Figure 18. State Diagram
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FUNCTIONAL DEVICE OPERATION MODE CHANGE
MODE CHANGE "SECURED SPI" DESCRIPTION:
A request is done by a SPI command, the device provide on MISO an unpredictable "random code". Software must perform a logical change on the code and return it to the device with the new SPI command to perform the desired action. The "random code" is different at every exercise of the secured procedure and can be read back at any time. The secured SPI uses the Special MODE register for the following transitions: - from Normal mode to INT mode - from Normal mode to FLASH mode - from Normal mode to RESET mode (reset request). "Random code" is also used when the "advance watchdog" is selected.
CHANGING OF DEVICE CRITICAL PARAMETERS
Some critical parameters are configured one time at device power on only, while the batfail flag is set in the INIT Mode. If a change is required while device is no longer in INIT mode, device must be set back in INIT mode using the "SPI secure" procedure.
WATCHDOG OPERATION IN NORMAL REQUEST MODE
In Normal Request Mode, the device expects to receive a watchdog configuration before the end of the normal request time out period. This period is reset to a long (256ms) after power on and when BATFAIL is set. The device can be configured to a different (shorter) time out period which can be used after wake-up from LP Vdd on mode. After a software watchdog reset, the value is restored to 256ms, in order to allow for a complete software initialization, similar to a device power up. In Normal Request Mode the watchdog operation is "timeout" only and can be triggered/served any time within the period. Watchdog in Debug Mode When the device is in Debug Mode (entered via the DBG pin), the watchdog continues to operate but does not affect the device operation by asserting a reset. For the user, operation appears without the watchdog. When debug is left by software (SPI mode reg) the watchdog period starts at the end of the SPI command. When debug mode is left by hardware (DBG pin below 810V), the device enters into Reset Mode. Watchdog in Flash Mode During flash mode operation, the watchdog can be set to a long time out period. Watchdog is timeout only and an INT pulse can be generated at 50% of the time window. Advance Watchdog Operation When the Advance watchdog is selected (at INIT Mode), the refresh of the watchdog must be done using a random number and with 1, 2, or 4 SPI commands. The number for the SPI command is selected in INIT mode. The software must read a random byte from the device, and then must return the random byte inverted to clear the watchdog. The random byte write can be performed in 1, 2, or 4 different SPI commands. If 1 command is selected, all 8 bits are written at once. If 2 commands are selected, first write command must include 4 of the 8 bits of the inverted random byte. The second command must include the next 4 bits. This complete the watchdog refresh. If 4 commands are selected, the first write command must include 2 of the 8 bits of the inverted random byte. The second command must include the next 2 bits, the 3rd command the next 2, and the last command, the last 2. This complete the watchdog refresh. When multiple writes are used, the most significant bits are send first. The latest SPI command needs to be done inside the open window time frame, if window watchdog is selected.
WATCHDOG TYPE SELECTION
Two different watchdog modes are implemented: Window or Advance. The selection of "Window" or "Advance" is done in INIT Mode, after device power up when the Batfail flag is set. Configuration is done via the SPI. Then the watchdog mode selection content is locked and can be changed only via a secured SPI procedure. Window Watchdog Operation The window watchdog is available in Normal Mode only. The watchdog period selection can be kept (SPI is selectable in INIT Mode), while the device enters into Low Power VDD ON Mode. The watchdog period is reset to the default long period after BATFAIL. The period and the refresh of watchdog is done by the SPI. A refresh must be done in the open window of the period, which starts at 50% of the selected period and ends at the end of the period. If the watchdog is triggered before 50%, or not triggered before end of period, a reset has occurred. The device enters into Reset Mode.
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FUNCTIONAL DEVICE OPERATION WATCHDOG OPERATION
DETAIL SPI OPERATION AND SPI COMMANDS FOR ALL WATCHDOG TYPES.
In INIT mode, the W/D type (window, time out, advance and number of SPI commands) is selected using register Init W/D, bits 1, 2 and 3. The W/D period is selected via TIM_A register. The W/D period selection can also be done in Normal mode or in Normal Request mode. Transition from INIT mode to Normal Mode or from Normal Request mode to Normal mode is done via a single W/D refresh command (SPI 0x 5A00). While in Normal mode, the W/D refresh command depends upon the W/D type selected in INIT mode. They are detailed in the paragraph below: Simple W/D: refresh commands is 0x5A00. It can be send any time within the W/D period if the time out W/D operation is selected (INIT-W/D register, bit 1 WD N/Win =0). It must be send in the open window (second half of the period) if the Window Watchdog operation was selected (INIT-W/D register, bit 1 WD N/Win =1). Advance Watchdog: The first time device enters in Normal mode (entry on Normal mode using the 0x5A00 command), RND code must be read using SPI command 0x1B00. Device returns on MISO second byte the RND code. The full 16 bits MISO is called 0x XXRD. RD is the complement of the RD byte. Advance Watchdog, refresh by 1 SPI command: The refresh command is 0x5ARD. During each refresh command device returns on MISO a new Random Code. This new random code must be inverted and send along with the next refresh command and so on. It must be done in the open window if the Window operation was selected.
Advance Watchdog, refresh by 2 SPI commands: The refresh command is splitted in 2 SPI commands. The first partial refresh command is 0x5Aw1, and the second is 0x5Aw2. Byte w1 contains the first 4 inverted bits of the RD byte plus the last 4 bits equal to zero. Byte w2 contains 4 bits equal to zero plus the last 4 inverted bits of the RD byte. During this second refresh command device return on MISO a new Random Code. This new random code must be inverted and send along with the next 2 refresh commands and so on. The second command must be done in the open window if the Window operation was selected. Advance Watchdog, refresh by 4SPI commands: The refresh command is splitted in 4 SPI commands. The first partial refresh command is 0x5Aw1, the second is 0x5Aw2, the third is 0x5Aw3 and the last is 0x5Aw4. Byte w1 contains the first 2inverted bits of the RD byte plus the last 6 bits equal to zero. Byte w2 contains 2 bits equal to zero plus the next 2 inverted bits of the RD byte plus 4 bits equal to zero. Byte w3 contains 4bits equal to zero plus the next 2 inverted bits of the RD byte plus 2 bits equal to zero. Byte w4 contains 6bits equal to zero plus the next 2 inverted bits of the RD byte. During this fourth refresh command device return on MISO a new Random Code. This new random code must be inverted and send along with the next 4 refresh commands. The fourth command must be done in the open window if the Window operation was selected.
PROPER RESPONSE TO INT
A device detect, that upon an INT, the software handles the INT in a timely manner: Access of the INT register is done within 2 watchdog periods. Such feature must be enabled by SPI via the INIT WD register bit 7
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FUNCTIONAL DEVICE OPERATION FUNCTIONAL BLOCK OPERATION VERSUS MODE
FUNCTIONAL BLOCK OPERATION VERSUS MODE
Table 6. Device Block Operation for Each State
State Power down Init Reset VDD OFF ON 5V-CAN OFF OFF I/Ox / WU OFF HS/LS off Wake up disable VAUX OFF OFF CAN High-impedance OFF: CAN termination 25k to gnd Transmitter / receiver /wake-up OFF OFF OFF OFF SPI config OFF + wake-up en/dis OFF + wake-up en/dis OFF + wake-up enable LIN1/2 High-impedance OFF: internal 30k pull up active. Transmitter: receiver / wake up OFF. LIN term OFF OFF OFF OFF SPI config OFF + wake-up en/dis OFF + wake-up en/dis OFF + wake-up enable
INIT Reset Normal Request Normal Low power VDD OFF Low power VDD ON SAFE output low: Safe case A
ON ON ON ON OFF ON(21) safe case A:ON safe case B: OFF ON
OFF Keep SPI config Keep SPI config SPI config OFF OFF
SPI config WU disable HS/LS off WU disable HS/LS off WU disable SPI config WU SPI config user defined WU SPI config user defined WU SPI config
OFF OFF OFF SPI config OFF OFF OFF
A: Keep SPI HS/LS off config, B: OFF wake-up by change state SPI config SPI config
FLASH
SPI config
SPI config
OFF
Notes 21. With limited current capability 22. 5V-CAN is ON in Debug mode.
The 5V-CAN default is ON when the device is powered-up and set in Debug Mode. It is fully controllable via the SPI command.
ILLUSTRATION OF DEVICE MODE TRANSITIONS.
A Power up to Normal Mode B B Normal to Low Power VDD OFF Mode C B Normal to Low Power VDD ON Mode D
VSUP
>4V Vdd-uv (4.5V typ)
VSUP Vdd-uv
VSUP
VDD 5V-CAN VAUX
VDD 5V-CAN
VDD 5V-CAN VAUX
VAUX
RST INT SPI MODE BATFAIL s_1: go to Normal Mode s_11: write INT registers legend: Series of SPI Single SPI
RST INT s_1 SPI NORMAL
RST INT s_2 SPI
s_12
s_11
s_13
RESET
INIT
NORMAL LP VDD Off s_2: go to Low Power VDD OFF Mode s_12: Low Power Mode configuration
NORMAL
s_3 LP VDD On
s_3: go to Low Power Mode s_13: Low Power Mode configuration
Figure 19. Power Up Normal and Low Power Modes
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FUNCTIONAL DEVICE OPERATION ILLUSTRATION OF DEVICE MODE TRANSITIONS.
C
Wake-up from Low Power VDD OFF Mode
D
Wake-up from Low Power VDD ON Mode
VSUP VDD-UV (4.5V typ)
VSUP
VDD 5V-CAN VAUX
VDD 5V-CAN VAUX Based on reg configuration Based on reg configuration
Based on reg configuration Based on reg configuration
RST INT SPI MODE LP VDD_OFF RESET
RST INT s_4 SPI MODE
s_14
s_14 LP VDD ON
NORMAL REQUEST
NORMAL
NORMAL REQUEST
s_4 NORMAL
Available wake up events (exclusive)
CAN bus CAN wake-up pattern
CAN bus CAN wake-up pattern
LIN Bus
LIN Bus
LIN wake-up filter
LIN wake-up filter
I/O x toggle
I/O x toggle
FWU timer Start . FWU timer duration (50-8192ms) SPI selectable Wake up detected
FWU timer Start Stop FWU timer duration (50-8192ms) SPI selectable IDD current IDD-OC (3mA typ) IDD OC deglitcher or timer (100us typ, 3 -32ms) SPI Wake up detected
Figure 20. Wake-up from Low Power Modes
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FUNCTIONAL DEVICE OPERATION CYCLIC SENSE OPERATION DURING LP MODES
CYCLIC SENSE OPERATION DURING LP MODES
This function can be used in both Low Power modes (LP Vdd off and LP Vdd on). Cyclic sense is the periodic activation of I/O-0, to allow biasing of external contact swicthes. The contact switch state can be detected via I/O-1, 2 and 3, and device can wake up from LP mode. Cyclic sense is optimized and designed primarily for closed contact switch, in order to minimize consumption via the contact pull up resistor. Principle: A dedicated timer allows to select a cyclic sense period from 3 to 512ms (selection in timer B). At end of the period, the I/O-0 will be activated for a duration of T_cson (SPI selectable in INIT register, to 200us,
I/O-0 high side active in Normal mode
400us, 800us or 1.6ms). The I/O-0 high side transistor or low side transistor can be activated. The selection is done by the state of I/O-0 prior to enter in low power mode. During the T-cson duration, the I/O-x are monitored. If one of them is high, the device will detect a wake up. (Figure 21). Cyclic sense period is selected by SPI configuration prior to enter in device low power mode. Upon entering LP mode, I/ O-0 should be activated. The level of I/O-1 is sense during the I/O-0 active time, and is deglitched for a duration of typ 30us. This mean that I/ O-1 should be in the expected state for a duration longer than the deglitcher time. The diagram below (Figure 21) illustrates the cyclic sense operation, with I/O-0 high side active and I/O-1 wake up in case of high level.
I/O-0 high side active during cyclic sense active time
I/O-0 S1 I/O-1 I/O-0 I/O-1 high => wake up Cyclic sense period state of I/O-1 low => no wake up Cyclic sense active time I/O-1 I/O-1 deglitcher time (typ 30us) S1 closed S1 open Zoom Cyclic sense active time (ex 200us)
NORMAL MODE
LOW POWER MODE
RESET or NORMAL REQUEST MODE
Wake up event detected
Wake up detected. R R R R R R
I/O-0 I/O-1
S1 S1
I/O-0 I/O-1
I/O-2
S2 S2
I/O-2
S3
I/O-3
S3
I/O-3
Upon entering in LP mode, all 3 contact switches are closed.
In LP mode, 1 contact switch is open. High level is detected on I/O-x, and device wakes up.
Figure 21. Cyclic Sense operation - switch to gnd, wake up by open switch
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FUNCTIONAL DEVICE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
BEHAVIOR AT POWER UP AND POWER DOWN DEVICE POWER UP:
This section describe the device behavior during ramp up, and ramp down of Vsup1, and the flexibility offered mainly by the Crank bit and the 2 Vdd undervoltage reset thresholds. The figures below illustrate the device behavior during Vsup1 ramp up. As the Crank bit is by default set to 0, Vdd is enable when Vsup1 is above Vsup th 1 parameters.
Vsup_nominal (ex 12V)
Vsup slew rate
Vdd nominal (ex 5V) VDD_UV TH (typ 4.65V)
VBAT D1
VSUP1 MC33905 I_VDD
VSUP1
VDD
Vsup_th1 VDD_start up 90% VDD_start up
Gnd
VDD RESET
10% VDD_start up VDD_off
1ms
Figure 22. Vdd start up versus Vsup1 tramp
DEVICE POWER DOWN
The figures below illustrate the device behavior during Vsup1 ramp down, based on Crank bit configuration, and Vdd undervoltage reset selection. Crank bit reset (INIT W/D register, bit 0 =0): Bit 0 = 0 is the default state for this bit. During Vsup ramp down, Vdd remain ON until device enters in Reset mode due to Vdd Under Voltage condition
(Vdd < 4.6V or Vdd < 3.2V typ, threshold selected by SPI). When device is in Reset, if Vsup is below "Vsup_th1", Vdd is turned OFF. Crank bit set (INIT W/D register, bit 0 =1): The bit 0 is set by SPI write. During Vsup ramp down, Vdd remains ON until device detects a POR and set BATfail. This occurs for a Vsup approx 3V.
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FUNCTIONAL DEVICE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
Vbat Vsup_nominal (ex 12V) VSUP1
Vbat Vsup_nominal (ex 12V) VSUP1
Vdd (5V) VDD_UV TH (typ 4.65V)
Vsup_th1 (4.1V)
Vdd (5V) VDD_UV TH (typ 4.65V) minVsup (3V)
VDD
VDD
RESET
RESET
Case 1: "Vdd UV th 4.6V", with bit Crank =0 (default value)
Case 2: "Vdd UV 4.6V", with bit Crank =1
Vbat Vsup_nominal (ex 12V) VSUP1
Vbat Vsup_nominal (ex 12V) VSUP1
Vsup_th1 (4.1V) Vdd (5V) VDD_UV TH (typ 4.65V) Vdd (5V) VDD_UV TH (typ 4.65V) minVsup (3V)
VDD VDD_UV TH2 (typ 3.2V) (2) INT RESET (1) (1) reset then (2) Vdd turn OFF
VDD VDD_UV TH2 (typ 3.2V)
INT RESET
Case 3: "Vdd UV th 3.2V", with bit Crank =0 (default value)
Case 2: "Vdd UV th 3.2V", with bit Crank =1
Figure 23. Vdd Behavior During Vsup1 Ramp Down
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FAIL SAFE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
FAIL SAFE OPERATION
OVERVIEW
Fail safe mode is entered when specific fail conditions occur. The "Safe state" condition is defined by the resistor connected at the DGB pin. Safe Mode is entered after additional event or conditions are met: time out for CAN communication and state at I/O-1 pin. Exit of the safe state is always possible by a wake-up event: in the safe state the device is automatically wakeable CAN and I/O (if configured as inputs). Upon wake-up, the device operation is resumed: enter in Reset Mode. modes B1, B2 and B3: Upon SAFE activation, the system continues to monitor external event, and disable the MCU supply (turn Vdd off). The external events monitored are: CAN traffic, I/O-1 low level or both of them. 3 sub cases exist, B1, B2 and B3. Note: no CAN traffic indicates that the ECU of the vehicle are no longer active, thus that the car is being parked and stopped. The I/O low level detection can also indicate that the vehicle is being shutdown, if the I/O-1 terminal is connected for instance to a switched battery signal (ignition key on/off signal). The selection of the monitored events is done by hardware, via the resistor connected at DBG pin, but can be over write by software, via a specific SPI command. By default, after power up the device detect the resistor value at DBG pin (upon transition from INIT to Normal mode), and, if no specific SPI command related to Debug resistor change is send, operates according to the detected resistor. The INIT MISC register allow to verify and change the device behaviour, to either confirm or change the hardware selected behaviour. Device will then operate according to the SAFE mode configured by SPI. Table below (Table 7) illustrates the complete options available:
FAIL SAFE FUNCTIONALITY
Upon dedicated event or issue detected at a device pin (i.e RESET), the Safe mode can be entered. In this mode, the SAFE terminal is active low. Description Upon activation of the SAFE terminal, and if the failure condition that make the SAFE pin activated have not recovered, the device can help to reduce ECU consumption, assuming that the MCU is not able to set the whole ECU in low power mode. Two main cases are available: mode A: Upon SAFE activation, the MCU remains powered (Vdd stays ON), until the failure condition recovers (i.e S/W is able to properly control the device and properly refresh the W/D). Table 7. Fail Safe Options
Resistor at DBG pin SPI coding - register INIT MISC bits [2,1,0] (higher priority that Resistor coding)
Safe mode code A B1 B2 B3
Vdd status
<6k typ 15k typ 33k typ 68k
bits [2,1,0) = [111]: verification enable: resistor at DBG terminal is typ 0kohms (RA) - Selection of SAFE mode A bits [2,1,0) = [110]: verification enable: resistor at DBG terminal is typ 15kohms (RB1) - Selection of SAFE mode B1 bits [2,1,0) = [101]: verification enable: resistor at DBG terminal is typ 33kohms (RB2 - Selection of SAFE mode B2 bits [2,1,0) = [100]: verification enable: resistor at DBG terminal is typ 68kohms (RB3) - Selection of SAFE mode B3
remains ON Turn OFF 8s after CAN traffic bus idle detection. Turn OFF when I/O-1 low level detected. Turn OFF 8s after CAN traffic bus idle detection AND when I/O-1 low level detected.
Exit of Safe Mode Exit of the safe state with Vdd off is always possible by a wake-up event: in this safe state the device is automatically wakeable by CAN and I/O (if I/O wake up was enable by SPI
prior to enter in SAFE mode). Upon wake-up, the device operation is resumed, and device enters in reset mode. The SAFE terminal remains active, until a proper read and clear of the SPI flags reporting the SAFE conditions.
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FAIL SAFE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
.
SAFE operation flow chart
Legend: Failure events Device state:
RESET RESET
(6) SAFE low - SAFE low - Vdd ON - Reset: 1ms periodic pulse - SAFE low - Vdd ON - Reset low
NR
bit 4, INIT W/D = 1 (1)
SAFE high SAFE low
Reset: 1ms pulse Reset: 1ms pulse
detection of 2nd consecutive W/D failure
bit 4, INIT W/D = 0 (1)
8 consecutive W/D failure (5) State A: Rdbg<6k AND W/D failure State A: Rdbg<6k AND (Vdd low or Rst s/c gnd) failure State B1: Rdbg=15k AND Bus idle time out expired safe state B State B2: Rdbg=33k AND I/O-1 low State B3: Rdbg=47k AND I/O-1 low AND Bus idle time out expired
SAFE pin release (SAFE high)
W/D failure
SPI (3)
a) Evaluation of Resistor detected at DBG pin during power up, or SPI register content - Reset low - SAFE low - Vdd ON b) ECU external signal monitoring (7): - bus idle time out - I/O-1 monitoring
Vdd low: VDDINIT, Normal Request Normal, FLASH
Rst s/c gnd: Rst <2.5V, t>100ms
safe state A
- SAFE low - Reset low - Vdd OFF
RESET
Wake up (2), Vdd ON, SAFE pin remains low failure recovery, SAFE pin remains low
1) bit 4 of INIT Watchdog register 2) Wake up event: CAN, LIN or I/O-1 high level (if I/O-1 wake up previously enabled) 3) SPI commands: 0xDD00 or 0xDD80 to release SAFE pin 4) Recovery: reset low condition released, Vdd low condition released, correct SPI W/D refresh 5) detection of 8 consecutive W/D failures: no correct SPI W/D refresh command occurred for duration of 8 x 256ms. 6) Dynamic behavior: 1ms reset pulse every 256ms, due to no W/D refresh SPI command, and device state transition between RESET and NORMAL REQUEST mode, or INIT RESET and INIT modes. 7) 8 second timer for bus idle time out. I/O-1 high to low transition.
Figure 24. Safe Operation Flow Chart Conditions to set SAFE pin active low: Watchdog refresh issue: SAFE activated at 1st reset pulse or at the second consecutive reset pulse (selected by bit 4, INIT W/D register). Vdd low: Vdd < RST-TH. SAFE pin is set low at same time as Reset pin is set low. The RESET pin is monitored to verify that reset is not clamped to a low level preventing the MCU to operate. If this is the case, the Safe Mode is entered.
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FAIL SAFE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
SAFE Mode A Illustration: The figure below illustrate the event, and consequences when SAFE Mode A is selected via the appropriate debug resistor or SPI configuration.
Behavior illustration for safe state A (Rdg <6kOhms), or selection by SPI step 1: Failure illustration step 2: Consequence on Vdd, RSTb and SAFE
Vdd failure event, i.e W/D 1st RSTb SAFE OFF state ON state 2nd 8th
Vdd
RSTb SAFE
8 x 256ms delay time to enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events
failure event, Vdd low
Vdd gnd RSTb SAFE
Vdd_UV th gnd
Vdd RSTb SAFE
Vdd < Vdd_UVth
OFF state ON state 100ms
100ms delay time to enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events
failure event, Reset s/c gnd Vdd RSTb SAFE OFF state 100ms 100ms deglitcher time to activate SAFE and enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events 2.5V ON state Vdd RSTb SAFE
Figure 25. SAFE Mode A Behavior Illustration
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FAIL SAFE OPERATION BEHAVIOR AT POWER UP AND POWER DOWN
SAFE mode B1, B2 and B3 illustration: The figure below illustrates the event, and consequences when SAFE Mode B1, B2 or B3 is selected via the appropriate debug resistor or SPI configuration.
Behavior illustration for safe state B (Rdg > 10kOhms)
CAN bus DBG resistor => safe state B1
step 2: Exclusive detection of ECU external event to disable Vdd based on Rdbg resistor or SPI configuration
CAN bus idle time
I/O-1 DBG resistor => safe state B2 I/O-1 high to low transition
CAN bus DBG resistor => safe state B3 I/O-1 I/O-1 high to low transition CAN bus idle time
step 1: Failure illustration
Vdd failure event, i.e W/D 1st RSTb SAFE OFF state ON state 2nd 8th
step 3: Consequences for Vdd
Vdd
RSTb SAFE
8 x 256ms delay time to enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events failure event, Vdd low If Vdd failure recovered
Vdd gnd RSTb SAFE
Vdd_UV th gnd
Vdd
Vdd < Vdd_UVth
Vdd OFF
RSTb OFF state ON state 100ms SAFE
100ms delay time to enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events failure event, Reset s/c gnd Vdd RSTb SAFE OFF state 100ms 2.5V ON state Vdd RSTb SAFE
E m CU et e => xte Vd rna d lc di o sa nd bl iti e on
If Reset s/c gnd recovered
Vdd OFF
100ms deglitcher time to activate SAFE and enter in SAFE mode to evaluate resistor at DBG pin and monitor ECU external events
Figure 26. SAFE Modes B1, B2 or B3 Behavior Illustration
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ak
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CAN INTERFACE CAN INTERFACE DESCRIPTION
CAN INTERFACE
CAN INTERFACE DESCRIPTION
The figure below is a high level schematic of the CAN interface. It consist in a low side driver between CANL and gnd, and high side driver from CANH to 5V-CAN. Two differential receivers are connected between CANH and CANL, to detect bus state and to wake up from CAN Sleep Mode. An internal 2.5V reference provide the 2.5V recessive level via the matched Rin resistors. The resistors can be switched to gnd in CAN Sleep Mode. A dedicated split buffer provide a low impedance 2.5V to the Split terminal, for recessive level stabilization.
VSUP
SPI & State machine 5V-CAN
Pattern Detection
Wake-up Receiver
Driver 2.5 V RIN
QH
CANH Differential Receiver RIN CANL
RXD
5V-CAN Driver Thermal QL
TXD SPI & State machine
5V-CAN Buffer SPLIT
SPI & State machine
Failure Detection & Management
Figure 27. CAN Interface Block Diagram CAN INTERFACE SUPPLY The supply voltage for the CAN driver is the 5V-CAN pin. The CAN interface also has a supply pass from the battery line, through the VSUP pin. This pass is used in CAN Sleep Mode to allow wake-up detection. During CAN communication (transmission and reception), the CAN interface current is sourced from the 5V-CAN pin. During CAN Low Power Mode, the current is sourced from the Vsup2 pin. TX RX MODE In Tx/Rx Mode, both the CAN driver and the receiver are ON. In this mode, the CAN lines are controlled by the TXD pin level, and the CAN bus state is reported on the RXD pin. The 5V-CAN regulator must be ON. It supplies the CAN driver and receiver.The SPLIT pin is active and a 2.5V biasing is provided on the SPLIT output pin. RECEIVE ONLY MODE This mode is used to disable the CAN driver, but leave the CAN receiver active. In this mode, the device is only able to report the CAN state on the RXD pin. The TXD pin has no effect on CAN bus lines. The 5V-CAN regulator must be ON. The SPLIT pin is active and a 2.5V biasing is provided on the SPLIT output pin. OPERATION in TX/RX Mode The CAN driver will be enable as soon as the device is in Normal Mode and the TXD pin is recessive.
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CAN INTERFACE CAN INTERFACE DESCRIPTION
When the CAN interface is in Normal Mode, the driver has two states: recessive or dominant. The driver state is controlled by the TXD pin. The bus state is reported through the RXD pin. When TXD is high, the driver is set in the recessive state, and CANH and CANL lines are biased to the voltage set with 5V-CAN divided by 2, or approx. 2.5V. When TXD is low, the bus is set into the dominant state, and CANL and CANH drivers are active. CANL is pulled low and CANH is pulled high. The RXD pin reports the bus state: CANH minus the CANL voltage is compared versus an internal threshold (a few hundred mV). If "CANH minus CANL" is below the threshold, the bus is recessive and RXD is set high. If "CANH minus CANL" is above the threshold, the bus is dominant and RXD is set low. The SPLIT pin is active and provide a 2.5V biasing to the SPLIT output. Tx/Rx Mode and Slew Rate Selection The CAN signal slew rate selection is done via the SPI. By default and if no SPI is used, the device is in the fastest slew rate. Three slew rates are available. The slew rate controls the recessive to dominant, and dominant to recessive transitions. This also affects the delay time from the TXD pin
. TXD
to the bus, and from the bus to the RXD. The loop time is thus affected by the slew rate selection. Minimum Baud rate The minimum baud is determined by the shortest TXD permanent dominant timing detection. The maximum number of consecutive dominant bits in a frame is 12 (6 bits of active error flag and its echo error flag). The shortest TXD dominant detection time of 300s lead to a single bit time of: 300s / 12 = 25s. So the minimum Baud rate is 1 / 25s = 40kBaud. SLEEP MODE Sleep Mode is a reduced current consumption mode. CANH and CANL driver are disabled and CANH and CANL lines are terminated to GND via the Rin resistor, the SPLIT pin is high-impedance. In order to monitor bus activities, the CAN wake-up receiver can be enabled. It is supplied internally from Vsup2. Wake-up events occurring on the CAN bus pin are reporting by dedicated flags in SPI and by INT pulse, and results in a device wake up if device was in Low Power Mode. When the device is set back into Normal Mode, CANH and CANL are set back into the recessive level. This is illustrated in Figure 28.
Dominant state CANH-DOM
Recessive state
CANH 2.5V CANL
CANL/CANH-REC CANH-CANL CANL-DOM
High ohmic termination (50kohms) to GND
RXD SPLIT 2.5V Bus Driver Receiver (bus dominant set by other IC) Normal or Listen Only Mode High- impedance Go to sleep, Sleep or Stand-by Mode Normal or Listen Only Mode
Figure 28. Bus Signal in Tx/Rx and Low Power Mode Wake-up When the CAN interface is in Sleep Mode with wake-up enabled, the CAN bus traffic is detected. The CAN bus wakeup is a pattern wake-up. The wake-up by the CAN is enabled or disabled via the SPI.
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CAN INTERFACE CAN INTERFACE DESCRIPTION
CAN bus
CANH Dominant Pulse # 1 CANL Internal differential wake-up receiver signal Dominant Pulse # 2
Internal wake-up signal Tcan wu1-f Can wake up detected
Figure 29. Single Dominant Pulse Wake-up Pattern Wake-up In order to wake-up the CAN interface, the wake-up receiver must receive a series of 3 consecutive valid dominant pulses, by default when the CANWU bit is low. CANWU bit can be set high by SPI and the wake-up will occur after a single pulse duration of 2s (typ).
. CAN bus CANH Dominant Pulse # 1 CANL Dominant Pulse # 2 Dominant Pulse # 3 Dominant Pulse # 4
A valid dominant pulse should be longer than 500ns. The 3 pulses should occur in a time frame of 120s, to be considered valid. When 3 pulses meet these conditions, the wake signal is detected. This is illustrated by the following figure.
Internal differential wake-up receiver signal
Internal wake-up signal
Tcan wu3-f
Tcan wu3-f Tcan wu3-to
Tcan wu3-f
Can wake up detected
Dominant Pulse # n: duration 1 or multiple dominant bits
Figure 30. Pattern Wake-up - Multiple Dominant Detection
BUS TERMINATION
The device supports the two main types of bus terminations: * Differential termination resistors between CANH and CANL lines.
* SPLIT termination concept, with the mid point of the differential termination connected to GND through a capacitor and to the SPLIT pin. * In application, device can also be used without termination.
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CAN INTERFACE CAN INTERFACE DESCRIPTION
* The figure below illustrate some of the most common terminations. Supported CAN Terminations
SPLIT termination CANH 60 SPLIT 60 CANL C5 ECU connector Termination outside ECU CANH C6 CANL C5 CAN bus SPLIT No connect 60 CAN bus SPLIT No connect CAN bus C4 Standard termination CANH C4 CANH No termination C4
CANL C5
C4 CAN bus 30
SPLIT C6 CANL C5 ECU connector Termination 30
Figure 31. Typical Application and Bus Termination Options
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CAN INTERFACE CAN BUS FAULT DIAGNOSTIC
CAN BUS FAULT DIAGNOSTIC
The device includes diagnostic of bus short-circuit to GND, VBAT, and internal ECU 5.0 V. Several comparators are implemented on CANH and CANL lines. These comparators
H5 Hb TX Diag Lg Vrg Lb L5 Vrvb Vr5 CANL Hg Vr5 VBAT (12-14V) Vrvb VDD VRVB (VSUP-2.0V) CANH VDD (5.0V) VR5 (VDD-.43V) CANH dominant level (3.6V) Recessive level (2.5V) VRG (1.75V) CANL dominant level (1.4V) GND (0.0V)
monitor the bus level in the recessive and dominant states. The information is then managed by a logic circuitry to properly determine the failure and report it.
Vrg
Logic
Figure 32. CAN Bus Simplified Structure Truth Table for Failure Detection The following table indicates the state of the comparators in case of a bus failure, and depending upon the driver state. Table 8. Failure Detection Truth Table
Failure Description No failure CANL to GND CANH to GND No failure CANL to VBAT CANH to VBAT No failure CANL to 5.0V CANH to 5.0V Driver Recessive State Lg (threshold 1.75V) 1 0 0 Lb (threshold VSUP -2.0V) 0 1 1 L5 (threshold VDD -0.43V) 0 1 1 Hg (threshold 1.75V) 1 0 0 Hb (threshold VSUP -2.0V) 0 1 1 H5 (threshold VDD -0.43V) 0 1 1 0 0 0 Lb (threshold VSUP -2.0V) 0 1 0 L5 (threshold VDD -0.43V) 0 1 0 Driver Dominant State Lg (threshold 1.75V) Hg (threshold 1.75V) 1 1 0 Hb (threshold VSUP -2.0V) 0 1 1 H5 (threshold VDD -0.43V) 0 1 1
DETECTION PRINCIPLE
In the recessive state, if one of the two bus lines are shorted to GND, VDD (5V), or VBAT, the voltage at the other line follows the shorted line, due to the bus termination resistance. For example: if CANL is shorted to GND, the CANL voltage is zero, the CANH voltage measured by the Hg comparator is also close to zero. In the recessive state, the failure detection to GND or VBAT is possible. However, it is not possible with the above implementation to distinguish which of the CANL or CANH lines are shorted to GND or VBAT. A complete diagnostic is possible once the driver is turned on, and in the dominant state. Number of Samples for Proper Failure Detection The failure detector requires at least one cycle of the recessive and dominant states to properly recognize the bus failure. The error will be fully detected after 5 cycles of the recessive-dominant states. As long as the failure detection
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circuitry has not detected the same error for 5 recessivedominant cycles, the error is not reported.
BUS CLAMPING DETECTION
If the bus is detected to be in dominant for a time longer than (TDOM), the bus failure flag is set and the error is reported in the SPI. Such condition could occur in case the CANH line is shorted to a high-voltage. In this case current will flow from the high-voltage short circuit through the bus termination resistors (60) and then in the SPLIT pin (if used) and in the device CANH and CANL input resistors, which are terminated to internal 2.5V biasing or to GND (Sleep Mode). Depending upon the high-voltage short-circuit, the number of nodes, usage of the SPLIT pin, RIN actual resistor and Mode state (Sleep or Active) the voltage across the bus termination can be sufficient to create a positive dominant voltage between CANH and CANL, and RXD pin will be low. This would prevent start of any CAN communication, and
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Analog Integrated Circuit Device Data Freescale Semiconductor
CAN INTERFACE CAN BUS FAULT DIAGNOSTIC
thus a proper failure identification (requires 5 pulses on TXD). The bus dominant clamp circuit will help to determine such failure situation.
RX PERMANENT RECESSIVE FAILURE
The aim of this detection, is to diagnose an external hardware failure at the RX output pin and ensure that a
TXD Diag Logic TX driver Diff output VDD/2 VDD RXD RX driver Diff CANL Rxsense VDD CANH 60 RX flag Prop delay RXD output CANL&H
permanent failure at RX does not disturb the network communication. If RX is shorted to a logic high signal, the CAN protocol module within the MCU will not recognize any incoming message. In addition it will not be able to easily distinguish the bus idle state and can start communication at any time. In order to prevent this, an RX failure detection is necessary.
Sampling
Sampling
RX short to VDD RX flag latched
The RX flag is not the RXPR bit in the LPC register, and neither is the CANF in the INTR register.
Figure 33. RX Path Simplified Schematic, RX Short to VDD Detection Implementation for Detection The implementation sense the RXD output voltage at each low to high transition of the differential receiver. Excluding the internal propagation delay, the RXD output should be low when the differential receiver is low. In case of an external short to VDD at the RXD output, RXD will be tied to a high level and can be detected at the next low to high transition of the differential receiver.
CANL&H
As soon as the RXD permanent recessive is detected, the RXD driver is deactivated. Once the error is detected the driver is disabled and the error is reported via SPI in CAN register. Recovery Condition The internal recovery is done by sampling a correct low level at TXD as shown in the following illustration.
Diff output Sampling Sampling RXD output Rx short to VDD RX no longer shorted to VDD
RX flag latched RX flag
The RX flag is not the RXPR bit in the LPC register, and neither is the CANF in the INTR register.
Figure 34. RX Path Simplified Schematic, Rx Short to VDD Detection
TXD PERMANENT DOMINANT
Principle If the TXD is set to a permanent low level, the CAN bus is set into dominant level, and no communication is possible. The device has a TXD permanent time out detector. After the timeout, the bus driver is disabled and the bus is released into a recessive state. The TXD permanent flag is set.
Recovery The TXD permanent dominant is used and activated also in case of a TXD short to RXD. The recovery condition for a TXD permanent dominant (recovery means the re-activation of the CAN drivers) is done by entering into a Normal Mode controlled by the MCU or when TXD is recessive while RXD change from recessive to dominant.
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CAN INTERFACE CAN BUS FAULT DIAGNOSTIC
TXD TO RXD SHORT CIRCUIT:
Principle In case TXD is shorted to RXD during incoming dominant information, RXD is set low. Consequently, the TXD pin is low and drives CANH and CANL into a dominant state. Thus the bus is stuck in dominant. No further communication is possible. Detection and Recovery The TXD permanent dominant timeout will be activated and release the CANL and CANH drivers. However, at the next
incoming dominant bit, the bus will then be stuck in dominant again. The recovery condition is same as the TXD dominant failure
IMPORTANT INFORMATION FOR BUS DRIVER REACTIVATION
The driver stays disabled until the failure is/are removed (Tx and/or RX is no longer permanent dominant or recessive state or shorted) and the failure flags cleared (read). The CAN driver must be set by SPI in TxRx mode in order to re enable the CAN bus driver.
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LIN BLOCK LIN INTERFACE DESCRIPTION
LIN BLOCK
LIN INTERFACE DESCRIPTION
The physical interface is dedicated to automotive LIN subbus applications. The interface has 20kbps and 10kbps baud rates, and includes as well as a fast baud rate for test and programming modes. It has excellent ESD robustness and immunity against disturbance, and radiated emission performance. It has safe behavior in case of a LIN bus short-to-ground, or a LIN bus leakage during low power mode. Digital inputs are related to device Vdd terminal. The LIN pin exhibits no reverse current from the LIN bus line to VSUP, even in the event of a GND shift or VSUP disconnection. The transmitter has a 20 kbps, 10 kbps and fast baud rate, which are selected by SPI. Receiver Characteristics The receiver thresholds are ratiometric with the device Vsup2 voltage. If the Vsup2 voltage goes below typ 6.1V, the LIN bus enters into a recessive state even if communication is sent on TXD. If LIN driver temperature reached over temperature threshold, the transceiver and receiver are disabled. When the temperature falls below the over temperature threshold, LIN driver and receiver will be automatically enabled.
POWER SUPPLY PIN (VSUP)
The VSUP-2 terminal is the supply pin for the LIN interface. To avoid a false bus message, an under-voltage on VSUP disables the transmission path (from TXD to LIN) when VSUP falls below 6.1 V.
GROUND PIN (GND)
In case of a ground disconnection at the module level, the LIN interface do not have significant current consumption on the LIN bus pin when in the recessive state.
DATA INPUT PIN (TXDL1, TXDL2)
The TXDl1 (TXDL2) input pin is the MCU interface to control the state of the LIN output. When TXDL is LOW (dominant), LIN output is LOW. When TXDL is HIGH (recessive), the LIN output transistor is turned OFF. This pin has an internal pull-up current source to Vdd to force the recessive state if the input pin is left floating. If the pin stays low (dominant sate) more than t TXDDOM, the LIN transmitter goes automatically in recessive state. This is reported by flag in LIN register.
LIN BUS PIN (LIN1, LIN2)
The LIN terminal represents the single-wire bus transmitter and receiver. It is suited for automotive bus systems, and is compliant to the LIN bus specification 2.1 and SAEJ2602-2. The LIN interface is only active during Normal mode. Driver Characteristics The LIN driver is a low side MOSFET with internal overcurrent thermal shutdown. An internal pull-up resistor with a serial diode structure is integrated so no external pull-up components are required for the application in a slave node. An additional pull-up resistor of 1.0 k must be added when the device is used in the master node. The 1.0 k pull resistor can connected to LIN term or to ECU battery supply.
DATA OUTPUT PIN (RXDL1, RXDL2)
The RXDl output pin is the MCU interface, which reports the state of the LIN bus voltage. LIN HIGH (recessive) is reported by a high voltage on RXD, LIN LOW (dominant) is reported by a low voltage on RXD.
LIN OPERATIONAL MODES
The LIN interface have two operational modes, Transmit receiver and LIN disable modes. When the fast baud rate is selected, the slew rate and timing are much faster than the above specification and allow fast data transition.
TRANSMIT RECEIVE
In the TxRx mode, the LIN bus can transmit and receive information. When the 20kbps baud rate is selected, the slew rate and timing are compatible with LIN protocol specification 2.1. When the 10kbps baud rate is selected, the slew rate and timing are compatible with J2602-2.
SLEEP MODE
This mode is selected by SPI, and the transmission path is disabled. Supply current for LIN block from VSUP2 is very low (typ 3uA). LIN bus is monitor to detect wake-up event. In the Sleep Mode, the internal 725 kOhm pull-up resistor is connected and the 30 kOhm disconnected.
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LIN BLOCK LIN OPERATIONAL MODES
The LIN block can be awakened from Sleep Mode by detection of LIN bus activity. LIN Bus Activity Detection The LIN bus wake-up is recognized by a recessive to dominant transition, followed by a dominant level with a duration greater than 70 s, followed by a dominant to recessive transition. This is illustrated in Figures 15 on page 26 and Figures 16 on page 27. Once the wake-up is Table 9. LIN Block Failure
FAULT FUNCTIONNAL MODE CONDITION
detected, the event is reported to the device state machine. An INT is generated if device is in LP Vdd ON mode, or Vdd will restart if device was in LP Vdd off mode. The wake up can be enable or disable by SPI. Fail-Safe Features The table below describes the LIN block behavior in case of failure.
CONSEQUENCE LIN transmitter in recessive State LIN transmitter in recessive State LIN transmitter and receiver disabled High Side turned off
RECOVERY
LIN supply undervoltage Tx Rx TXD Pin Permanent Dominant Tx Rx LIN Thermal Shutdown
LIN supply voltage < 6V (typ) TXD pin low for more than t TXDDOM
Condition gone Condition gone
LIN driver temperature > 160C (typ)
Condition gone
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SERIAL PERIPHERAL INTERFACE HIGH LEVEL OVERVIEW
SERIAL PERIPHERAL INTERFACE
HIGH LEVEL OVERVIEW
The device is using a 16 bits SPI, with the following arrangement: MOSI, Master Out Slave In bits: * bits 15 and 14 (called C1 and C0) are control bits to select the SPI operation mode (write control bit to device register, read back of the control bits, read of device flag). * bit 13 to 9 (A4 to A0) to select the register address. * bit 8 (P/N) has two functions: parity bit in write mode (optional, = 0 if not used), Next bit (=1) in read mode. * bit7 to 0 (D7 to D0): control bits MISO, Master IN Slave Out bits: * bits 15 to 8 (S15 to S8) are device status bits * bits 7 to 0(Do7 to Do0) are either extended device status bits, device internal control register content or device flags. Figure 35 is an overview of the SPI implementation.
Bit 7 Bit 6 D7 D6 Bit 5 D5 Bit 4 Bit 3 D4 D3 Bit 2 D2 Bit 1 D1 Bit 0 D0
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9
Bit 8 P/N
MOSI
C1
C0
A4
A3
A2
A1
A0
control bits
register address
Parity (optional) or Next bit =1
S9 S8 Do7 Do6
data
MISO
S15
S14
S13
S12
S11
S10
Do5 Do4
Do3
Do2
Do1
Do0
Device Status
Extended Device Status, Register Control bits or Device Flags
CSb active low. Must rise at end of 16 clocks, for write commands, MOSI bits [15, 14] = [0 1]. SCLK signal is low outside of CSB active
CSb SCLK MOSI Don't care MISO Tri state
C1 S15 C0 S14 D0 Do0
Don't care
Tri state
MOSI and MISO data changed at SCLK rising edge and sampled at falling edge. Msb first. MISO tri state outside of CSB active
SPI wave form, and signals polarity
Figure 35. Device SPI Overview
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SERIAL PERIPHERAL INTERFACE DETAIL OPERATION
DETAIL OPERATION BITS 15,14 AND 8 FUNCTIONS
Table 10 summarizes the various SPI operation, depending upon bit 15, 14 and 8. Table 10. SPI Operations (bits 8, 14 & 15)
Control bits MOSI[15-14], C1-C0 Type of Command Parity/Next MOSI[8] P/N Note for Bit 8 P/N
00 01
Read back of register content Write to register address, to control device operation Reserved Read of device flags form a register address
1 0
Bit 8 must be set to 1, independently of the parity function selected or not selected. If bit 8 is set to "0": means parity not selected OR parity is selected AND parity = 0
1 10 11
if bit 8 is set to "1": means parity is selected AND parity = 1
1
Bit 8 must be set to 1, independently of the parity function selected or not selected.
BITS 13-9 FUNCTIONS
The device contains several registers. Their address is coded on 5 bits (bits 13 to 9). Each register controls or reports part of the device function. Data can be written to the register, to control the device operation or set default value or behavior. Every register can also be read back in order to ensure that its content (default setting or value previously written) is correct.
In addition some of the registers are used to report device flags. Device status on MISO When a write operation is performed to store data or control bit into the device, MISO pin reports a 16 bits fixed device status composed of 2 bytes: Device Fixed Status (bits 15 to 8) + extended Device Status (bits 7 to 0). In a read operation, MISO will report the Fixed device status (bits 15 to 8) and the next 8 bits will be the content of the selected register.
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SERIAL PERIPHERAL INTERFACE DETAIL OPERATION
REGISTER ADRESS TABLE
Table 11 is the list of device registers and their associated address, coded with bits 13 to 9. Table 11. Device Registers with Corresponding Address
Address MOSI[13-9] A4...A0 0_0000 Description Analog Multiplexer Quick Ref. Name MUX Functionality 1) Write "device control bits" to register address. 2) Read back register "control bits" 1) Write "data byte" to register address. 2) Read back "data byte" from register address
0_0001 0_0010 0_0011 0_0100 0_0101 0_0110 0_0111 0_1000 0_1001
Memory byte A Memory byte B Memory byte C Memory byte D Initialization Regulators Initialization Watchdog Initialization LIN and I/O Initialization Miscellaneous functions Specific Modes
RAM_A RAM_B RAM_C RAM_D Init REG Init W/D Init LIN I/O Init MISC SPE_MODE
1) Write "device initialization control bits" to register address. 2) Read back "initialization control bits" from register address
1) Write to register to select device Specific Mode, using "Inverted Random Code". 2) Read "Random Code" 1) Write "timing values" to register address. 2) Read back register "timing values"
0_1010 0_1011 0_1100 0_1101 0_1110
Timer_A: W/D & Low Power MCU consumption Timer_B: Cyclic Sense & Cyclic Interrupt Timer_C: W/D Low Power & Forced Wake-up Watchdog Refresh Mode register
TIM_A TIM_B TIM_C W/D MODE
Watchdog Refresh Commands 1) Write to register to select Low Power Mode, with optional "Inverted Random code" and select wake-up functionality 2) Read operations: Read back device "Current Mode" Read "Random Code", Leave "Debug Mode" 1) Write "device control bits" to register address, to select device operation. 2) Read back register "control bits". 3) Read device flags from each of the register addresses.
0_1111 1_0000 1_0001 1_0010
Regulator Control CAN interface control Input Output control Interrupt Control
REG CAN I/O Interrupt
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SERIAL PERIPHERAL INTERFACE DETAIL OPERATION
COMPLETE SPI OPERATION
Table 12 is a compiled view of all the SPI capabilities and options. Both MOSI and MISO information are described. Table 12. SPI Capabilities with Options
Type of Command Read back of "device control bits" (MOSI bit 7 = 0) OR Read specific device information (MOSI bit 7 = 1) MOSI/ MISO MOSI MISO MOSI MISO Write device control bit to address selected by bits (13-9). MISO return 16 bits device status Reserved MOSI MISO MOSI MISO Read device flags and wake-up flags, from register address (bit 13-9), and sub address (bit 7). MISO return fixed device status (bit 15-8) + flags from the selected address and sub-address. MISO MOSI MISO MOSI 11 address Reserved Control bits [15-14] 00 Address [13-9] address Parity/Next bits [8] 1 Bit 7 0 Bits [6-0] 000 0000 Register control bits content 1 000 0000 Device ID and I/Os state Control bits Device Extended Status (8 bits) Reserved Reserved 0 Read of device flags form a register address, and sub address LOW (bit 7) Flags 1 Read of device flags form a register address, and sub address HIGH (bit 7) Flags
Device Fixed Status (8 bits) 00 address 1
Device Fixed Status (8 bits) 01 address (note)
Device Fixed Status (8 bits) 10
Device Fixed Status (8 bits) 11 address 1
Device Fixed Status (8 bits)
Note: P = 0 if parity bit is not selected or parity = 0. P = 1 if parity is selected and parity = 1.
Thus the Exact command will then be: MOSI [bit 15-0]= 01 00 011 0 01101001 Examples 2: MOSI [bit 15-0]= 01 00 011 P 0100 0000, P should be 1, because the command contains 4 bits with logic 1. Thus the Exact command will then be: MOSI [bit 15-0]= 01 00 011 1 0100 0000 Parity function selection: The parity function is optional. It is selected by bit 6 in INIT MISC register. If parity function is not selected (bit 6 of INIT MISC =0), then Parity bits in all SPI commands (bit 8) must be "0".
PARITY BIT 8
Calculation The parity is used for write to register command (bit 15,14 = 01). It is calculated based on the number of logic one contained in bits 15-9,7-0 sequence (this is the whole 16 bits of the write command except bit 8). Bit 8 must be set to 0 if the number of 1 is odd. Bit 8 must be set to 1if the number of 1 is even. Examples 1: MOSI [bit 15-0]= 01 00 011 P 01101001, P should be 0, because the command contains 7 bits with logic 1.
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SERIAL PERIPHERAL INTERFACE DETAIL OF CONTROL BITS AND REGISTER MAPPING
DETAIL OF CONTROL BITS AND REGISTER MAPPING
The following tables contain register bit meaning arranged by register address, from address 0_000 to address 1_0100
MUX AND RAM REGISTERS
Table 13. MUX Register
MOSI First Byte [15-8] [b_15 b_14] 0_0000 [P/N] 01 00 _ 000 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 MUX_2 0 bit 6 MUX_1 0 bit 5 MUX_0 0 bit 4 Int 2K N/A bit 3 I/O-att 0 POR bit 2 X bit 1 X bit 0 X
POR, 5V-CAN off, any mode different from Normal Description
Bits b7 b6 b5 000 001 010 011 100 101 110 111 b4 0 1 b3 0 1
MUX_2, MUX_1, MUX_0 - Selection of external input signal or internal signal to be measured at MUX-OUT terminal All functions disable. No output voltage at MUX-OUT terminal VDD regulator current recopy. Ratio is approx 1/97. Requires an external resistor or selection of Internal 2K (bit 3) Device internal voltage reference (approx 2.5V) Device internal temperature sensor voltage Voltage at I/O-0. Attenuation or gain is selected by bit 3. Voltage at I/O-1. Attenuation or gain is selected by bit 3. Voltage at VSUP_1 terminal. Refer to electrical table for attenuation ratio (approx 5) Voltage at VSENSE terminal. Refer to electrical table for attenuation ratio (approx 5) INT 2k - Select device internal 2kohm resistor between AMUX and GND. This resistor allows the measurement of a voltage proportional to the VDD output current. Internal 2 kohm resistor disable. An external resistor must be connected between AMUX and GND. Internal 2 kohm resistor enable. I/O-att - When I/O-0 (or I/O-1) is selected with b7,b6,b5=100 (or 101), b3 selects attenuation or gain between I/O-0 (or I/O-1) and MUX-OUT terminal Gain is approx 2 for device with VDD =5V (Ref to electrical table for exact gain value) Gain is approx 1.3 for device with VDD =3.3V (Ref to electrical table for exact gain value) Attenuation is approx 6 for device with VDD =5V (Ref to electrical table for exact attenuation value) Attenuation is approx 4 for device with VDD =3.3V (Ref to electrical table for exact attenuation value)
Table 14. Internal Memory Registers A, B, C and D, RAM_A, RAM_B, RAM_C and RAM_D
MOSI First Byte [15-8] [b_15 b_14] 0_0xxx [P/N] 01 00 _ 001 P Default state Condition for default 01 00 _ 010 P Default state Condition for default 01 00 _ 011 P Default state Condition for default 01 00 _ 100 P Default state Condition for default Ram d7 0 Ram d6 0 Ram d5 0 Ram d4 0 POR Ram c7 0 Ram c6 0 Ram c5 0 Ram c4 0 POR Ram d3 0 Ram d2 0 Ram d1 0 Ram d0 0 Ram b7 0 Ram b6 0 Ram b5 0 Ram b4 0 POR Ram c3 0 Ram c2 0 Ram c1 0 Ram c0 0 MOSI Second Byte, bits 7-0 Bit 7 Ram a7 0 Bit 6 Ram a6 0 Bit 5 Ram a5 0 Bit 4 Ram a4 0 POR Ram b3 0 Ram b2 0 Ram b1 0 Ram b0 0 Bit 3 Ram a3 0 Bit 2 Ram a2 0 Bit 1 Ram a1 0 Bit 0 Ram a0 0
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INIT REGISTERS
Note: these registers can be written only in INIT mode Table 15. Initialization Regulator Registers, INIT REG (note: register can be written only in INIT mode)
MOSI First Byte [15-8] [b_15 b_14] 0_0101 [P/N] 01 00 _ 101 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 I/Ox sync 1 bit 6 VDDL rst[1] 0 bit 5 VDDL rst[0] 0 bit 4 VDD rstD[1] 0 POR bit 3 VDD rstD[0] 0 bit 2 VAUX5/3 0 bit 1 Cyclic on[1] 0 bit 0 Cyclic on[0] 0
Bit
b7 0 1 b6, b5 00 01 10 11 b4, b3 00 01 10 11
Description
I/Ox sync - Determine if I/O-1 is sensed during I/O-0 activation, when cyclic sense function is selected I/O-1 sense anytime I/O-1 sense during I/O-0 activation VDDL rst[1] VddL rst[0] - Select the VDD Under-voltage threshold, to activate Reset terminal and/or INT Reset at approx 0.9 VDD. INT at approx 0.9 VDD, Reset at approx 0.7 VDD Reset at approx 0.7 VDD Reset at approx 0.9 VDD. VDD rstD[1] VDD rstD[0] - Select the Reset terminal low lev duration, after VDD rises above the VDD under-voltage threshold 1ms 5ms 10ms 20ms
b2 0 1
[VAUX 5/3] - Select Vauxilary output voltage VAUX = 3.3V VAUX = 5
b1, b0 00 01 10 11
Cyclic on[1] Cyclic on[0] - Determine if I/O-1 activation time, when cyclic sense function is selected 200s (typical value. ref to dynamic parameters for exact value) 400s (typical value. ref to dynamic parameters for exact value) 800s (typical value. ref to dynamic parameters for exact value) 1600s (typical value. ref to dynamic parameters for exact value)
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Table 16. Initialization Watchdog Registers, INIT W/D (note: register can be written only in INIT mode)
MOSI First Byte [15-8] [b_15 b_14] 0_0110 [P/N] 01 00 _ 110 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 WD2INT 0 bit 6 MCU_OC 1 bit 5 OC-TIM 0 POR bit 4 WD Safe bit 3 WD_spi[1] 0 bit 2 WD_spi[0] 0 bit 1 WD N/Win 1 bit 0 Crank 0
Bit
b7 0 1
Description
WD2INT - Select the maximum time delay between INT occurrence and INT source read SPI command Function disable. No constraint between INT occurrence and INT source read. INT source read must occur before the remaining of the current W/D period plus 2 complete W/D periods.
b6, b5
MCU_OC, OC-TIM - In Low Power VDD ON, select watchdog refresh and VDD current monitoring functionality. VDD_OC_LP threshold is defined in device electrical parameters (approx 1.5mA) In low power mode, when W/D is not selected
no W/D + 00 no W/D + 01 no W/D + 10
In Low Power VDD ON Mode, VDD over-current has no effect In Low Power VDD ON Mode, VDD over-current has no effect In Low Power VDD ON Mode, VDD current > VDD_OC_LP threshold for a time > 100s (typ) is a wakeup event
no W/D + 11 In Low Power VDD ON Mode, VDD current > VDD_OC_LP threshold for a time > I_mcu_OC is a wake-up event. I_mcu_OC time is selected in Timer register (selection range from 3 to 32ms) In low power mode when W/D is selected W/D + 00 W/D + 01 W/D + 10 W/D + 11 In Low Power VDD ON Mode, VDD current > VDD_OC_LP threshold has no effect. W/D refresh must occur by SPI command. In Low Power VDD ON Mode, VDD current > VDD_OC_LP threshold has no effect. W/D refresh must occur by SPI command. In Low Power VDD ON Mode, VDD over-current for a time > 100s (typ) is a wake-up event. In Low Power VDD ON Mode, VDD current > VDD_OC_LP threshold for a time < I_mcu_OC is a W/D refresh condition. VDD current > VDD_OC_LP threshold for a time > I_mcu_OC is wake-up event. I_mcu_OC time is selected in Timer register (selection range from 3 to 32ms)
b4 0 1
WD Safe - Select the activation of the SAFE terminal low, at first or second consecutive RESET pulse SAFE terminal is set low at the time of the RESET terminal low activation SAFE terminal is set low at the second consecutive time RESET pulse
b3, b2 00 01 10 11
WD_spi[1] WD_spi[0] - Select the Watchdog (W/D) Operation Simple Watchdog selection: W/D refresh done by a 8bits or 16 bits SPI Enhanced 1: Refresh is done using the Random Code, and by a single 16 bits. Enhanced 2: Refresh is done using the Random Code, and by two 16 bits command. Enhanced 4: Refresh is done using the Random Code, and by four 16 bits command.
b1 0 1 b0 0 1
WD N/Win - Select the Watchdog (W/D) Window or Time out operation Watchdog operation is TIME OUT, W/D refresh can occur anytime in the period Watchdog operation is WINDOW, W/D refresh must occur in the open window (second half of period) Crank - Select the Vsup1 threshold to disable Vdd, while Vsup1 is falling toward gnd Vdd disable when Vsup1 is below typ 4V (parameter Vsup-th1), and device in Reset mode Vdd kept ON when Vsup1 is below typ4V (parameter Vsup_th1)
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Table 17. Initialization LIN and I/O registers, INIT LIN I/O (note: register can be written only in INIT mode)
MOSI First Byte [15-8] [b_15 b_14] 0_0111 [P/N] 01 00 _ 111 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 I/O-1 ovoff 0 bit 6 LIN_T1[1] 0 bit 5 LIN_T1[0] 0 POR bit 4 LIN_T0[1] bit 3 LIN_T0[0] 0 bit 2 I/O-1 out-en 0 bit 1 I/O-0 out-en 0 bit 0 Cyc_Inv 0
Bit
b7 0 1
Description
I/O-1 ovoff - Select the deactivation of I/O-1 in case VDD or VAUX over voltage condition is detected Disable I/O-1 turn off. Enable I/O-1 turn off, in case VDD or VAUX over-voltage condition is detected.
b6, b5 00 01 10 11
LIN_T1[1], LIN_T1[1] - Select Terminal operation as LIN Master Terminal switch or I/O Terminal is OFF Terminal operation as LIN Master Terminal switch Terminal operation as I/O: high side switch and wake-up input N/A
b4, b3 00 01 10 11
LIN_T0[1], LIN_T0[1] - Select Terminal operation as LIN Master Terminal switch or I/O Terminal is OFF Terminal operation as LIN Master Terminal switch Terminal operation as I/O: high side switch and wake-up input N/A
b2 0 1
I/O-1 out-en- Select the operation of the I/O-1 as output driver (high side, low side) Disable high side and low side drivers of terminal I/O-1. I/O-1 can only be used as input. Enable high side and low side drivers of terminal I/O-1. Terminal can be used as input and output driver.
b1 0 1
I/O-0 out-en - Select the operation of the I/O-0 as output driver (high side, low side) Disable high side and low side drivers of terminal I/O-0. I/O-0 can only be used as input. Enable high side and low side drivers of terminal I/O-0. Terminal can be used as input and output driver.
b0
Cyc_Inv - Select I/O-0 operation in device Low Power mode, when cyclic sense is selected During cyclic sense active time, I/O is set to the same state prior to enter in low power mode. During cyclic sense off time, I/O-0 is disable (high side and low side drivers OFF). During cyclic sense active time, I/O is set to the same state prior to enter in low power mode. During cyclic sense on time, I/O-0 is actively set to the opposite (High side or low side driver is turned on).
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Table 18. Initialization Miscellaneous Functions, INIT MISC (note: register can be written only in INIT mode)
MOSI First Byte [15-8] [b_15 b_14] 0_1000 [P/N] 01 01_ 000 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 LPM w RND 0 bit 6 SPI parity 0 bit 5 INT pulse 0 POR bit 4 INT width bit 3 INT flash 0 bit 2 Dbg Res[2] 0 bit 1 Dbg Res[1] 0 bit 0 Dbg Res[0] 0
Bit
b7 0 1
Description
LPM w RND - Select the functionality to change mode (enter in Low Power) using the device Random Code Function disable: the Low Power mode can be entered without usage of Random Code Function enabled: the Low Power mode is entered using the Random Code
b6 0 1
SPI parity - Select usage of the parity bit in SPI write operation Function disable: the parity is not used. The parity bit must always set to logic 0. Function enable: the parity is used, and parity must be calculated.
b5 0 1
INT pulse -Select INT terminal operation: low level pulse or low level INT terminal will assert a low level pulse, duration selected by bit [b4] INT terminal assert a permanent low level (no pulse)
b4 0 1
INT width - Select the INT pulse duration INT pulse duration is typ 100s. Ref to dynamic parameter table for exact value. INT pulse duration is typ 25s. Ref to dynamic parameter table for exact value.
b3
INT flash - Select INT pulse generation at 50% of the Watchdog Period in Flash mode Function disable Function enable: an INT pulse will occur at 50% of the Watchdog Period when device in flash mode.
b2, b1, b0 0xx 100 101 110 111
Dbg Res[2], Dbg Res[1], Dbg Res[0] - Allow verification of the external resistor connected at DBG terminal. Ref to parametric table for resistor range value. Function disable 100 verification enable: resistor at DBG terminal is typ 68kohms (RB3) - Selection of SAFE mode B3 101 verification enable: resistor at DBG terminal is typ 33kohms (RB2 - Selection of SAFE mode B2 110 verification enable: resistor at DBG terminal is typ 15kohms (RB1) - Selection of SAFE mode B1 111 verification enable: resistor at DBG terminal is typ 0kohms (RA) - Selection of SAFE mode A
Notes 23. Bits b2,1 and 0 allow the following operation: First, check the resistor device has detected at the Debug pin. If the resistor is different, bit 5 (Debug resistor) is set in INTerrupt register (ref to device flag table). Second, over write the resistor decoded by device, to set the SAFE mode operation by SPI. Once this function is selected by bit 2 =1, this selection has higher priority than "hardware", and device will behave according to b2,b1 and b0 setting
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.SPECIFIC MODE REGISTER
Table 19. Specific Mode Register, SPE_MODE
MOSI First Byte [15-8] [b_15 b_14] 01_001 [P/N] 01 01_ 001 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 Sel_Mod[1] 0 bit 6 Sel_Mod[0] 0 bit 5 Rnd_C5b 0 POR bit 4 Rnd_C4b bit 3 Rnd_C3b 0 bit 2 Rnd_C2b 0 bit 1 Rnd_C1b 0 bit 0 Rnd_C0b 0
Bit
b7, b6 00 01 10 11
Description
Sel_Mod[1], Sel_Mod[0] - Mode selection: these 2 bits are used to select which mode the device will enter upon a SPI command. RESET mode INIT mode FLASH mode N/A
b5....b0
[Rnd_C4b... Rnd_C0b] - Random Code inverted, these 6 bits are the inverted bits obtained from the SPE-MODE Register read command.
The SPE MODE register is used for the following operation: - Set the device in RESET mode, to exercise or test the RESET functions. - Go to INIT mode, using the Secure SPi command. - Go to FLASH mode (in this mode the watchdog timer can be extended up to 32s). - Activate the SAFE terminal by S/W. These mode (called Special Mode) are accessible via secured SPI command, which consist in 2 commands: 1) reading a random code and 2) then write the inverted random code plus mode selection or SAFE pin activation: Return to INIT mode is done as follow (this is done from Normal mode only): 1) Read random code: MOSI : 0001 0011 0000 0000 [Hex:0x 13 00] MISO report 16 bits, random code are bits (5-0) miso = xxxx xxxx xxR5 R4 R3 R2 R1 R0 (Rx= 6 bits random code)
2) Write INIT mode + random code inverted MOSI : 0101 0010 01 Ri5 Ri4 Ri3 Ri2 Ri1 Ri0 [Hex 0x 52 HH] (Rix= random code inverted) MISO : xxxx xxxx xxxx xxxx (don't care) SAFE pin activation: SAFE pin can be set low, only in INIT mode, with following commands: 1) Read random code: MOSI : 0001 0011 0000 0000 [Hex:0x 13 00] MISO report 16 bits, random code are bits (5-0) miso = xxxx xxxx xxR5 R4 R3 R2 R1 R0 (Rx= 6 bits random code) 2) Write INIT mode + random code bits 5:4 not inverted and random code bits 3:0 inverted MOSI : 0101 0010 01 R5 R4 Ri3 Ri2 Ri1 Ri0 [Hex 0x 52 HH] (Rix= random code inverted) MISO : xxxx xxxx xxxx xxxx (don't care) Return to RESET or FLASH mode is done similarly to the go to INIT mode, except that the b7, b6 are set according to table above (b7, b6 = 00 - go to reset, b7, b6 = 10 - go to FLASH).
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TIMER REGISTERS
Table 20. Timer Register A, Low Power Vdd over current & Watchdog Period Normal mode, TIM_A
MOSI First Byte [15-8] [b_15 b_14] 01_010 [P/N] 01 01_ 010 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 I_mcu[2] 0 bit 6 I_mcu[1] 0 bit 5 I_mcu[1] 0 bit 4 W/D Nor[4] 1 POR bit 3 W/D_N[4] 1 bit 2 W/D_Nor[3] 1 bit 1 W/D_N[2] 1 bit 0 W/D_Nor[0] 0
Low Power Vdd over current (ms)
b6, b5 b7 00 0 1 3 (def) 4 01 6 8 10 12 16 11 24 32
Watchdog Period in Device Normal Mode (ms)
b2, b1, b0 b4, b3 000 00 01 10 11 2.5 3 3.5 4 001 5 6 7 8 010 10 12 14 16 011 20 24 28 32 100 40 48 56 64 101 80 96 112 128 110 160 192 224 256 (def) 111 320 384 448 512
Table 21. Timer Register B, Cyclic Sense and Cyclic INT, in Device Low Power Mode, TIM_B
MOSI First Byte [15-8] [b_15 b_14] 01_011 [P/N] 01 01_ 011 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 Cyc-sen[3] 0 bit 6 Cyc-sen[2] 0 bit 5 Cyc-sen[1] 0 bit 4 Cyc-sen[0] 0 POR bit 3 Cyc-int[3] 0 bit 2 Cyc-int[2] 0 bit 1 Cyc-int[1] 0 bit 0 Cyc-int[0] 0
Cyclic sense (ms)
b6, b5, b4 b7 000 0 1 3 4 001 6 8 010 12 16 011 24 32 100 48 64 101 96 128 110 192 256 111 384 512
Cyclic Interrupt (ms)
b2, b1, b0 b3 000 0 1 6 (def) 8 001 12 16 010 24 32 011 48 64 100 96 128 101 192 258 110 384 512 111 768 1024
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Table 22. Timer Register C, Watchdog LP Mode or Flash Mode and Forced Wake-up Timer, TIM_C
MOSI First Byte [15-8] [b_15 b_14] 01_100 [P/N] 01 01_ 100 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 WD-LP-F[3] 0 bit 6 WD-LP-F[2] 0 bit 5 WD-LP-F[1] 0 bit 4 WD-LP-F[0] 0 POR bit 3 FWU[3] 0 bit 2 FWU[2] 0 bit 1 FWU[1] 0 bit 0 FWU[0] 0
Table 23. Typical Timing Values Watchdog in Low Power VDD ON Mode (in ms)
b6, b5, b4 b7 000 0 1 12 16 001 24 32 010 48 64 011 96 128 100 192 256 101 384 512 110 768 1024 111 1536 2048
Watchdog in Flash Mode (in ms)
b6, b5, b4 b7 000 0 1 48 (def) 256 001 96 512 010 192 1024 011 384 2048 100 768 4096 101 1536 8192 110 3072 16384 111 6144 32768
Forced Wake Up (in ms)
b2, b1, b0 b3 000 0 1 48 (def) 64 001 96 128 010 192 258 011 384 512 100 768 1024 101 1536 2048 110 3072 4096 111 6144 8192
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WATCHDOG AND MODE REGISTERS
Table 24. Watchdog refresh register, W/D
MOSI First Byte [15-8] [b_15 b_14] 01_101 [P/N] 01 01_ 101 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 0 0 bit 6 0 0 bit 5 0 0 bit 4 0 0 POR bit 3 0 0 bit 2 0 0 bit 1 0 0 bit 0 0 0
Notes 24. The Simple Watchdog Refresh command is in hexadecimal: 5A00. This command is used to refresh the W/D and also to transition from INIT mode to Normal Mode, and from Normal Request Mode to Normal mode (after a wake up of a reset)
. Table 25. MODE Register, MODE
MOSI First Byte [15-8] [b_15 b_14] 01_110 [P/N] 01 01_ 110 P Default state MOSI Second Byte, bits 7-0 bit 7 Mode[4] N/A bit 6 Mode[3] N/A bit 5 Mode[2] N/A bit 4 Mode[1] N/A bit 3 Mode[0] N/A bit 2 Rnd_b[2] N/A bit 1 Rnd_b[1] N/A bit 0 Rnd_b[0] N/A
Low Power Vdd OFF selection and FWU / Cyclic Sense selection
b7, b6, b5, b4, b3 0 1100 0 1101 0 1110 0 1111 FWU off off ON ON Cyclic Sense off ON off ON
Table 26. Low Power Vdd ON selection and operation mode
b7, b6, b5, b4, b3 1 0000 1 0001 1 0010 1 0011 1 0100 1 0101 1 0110 1 0111 1 1000 1 1001 1 1010 1 1011 1 1100 1 1101 1 1110 1 1111 b2, b1, b0 FWU off off off off off off off off ON ON ON ON ON ON ON ON Cyclic Sense off off off off ON ON ON ON off off off off ON ON ON ON Cyclic INT off off ON ON off off ON ON off off ON ON off off ON ON Watchdog off ON off ON off ON off ON off ON off ON off ON off ON
Random Code inverted, these 3bits are the inverted bits obtained from the previous SPI command.
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Prior to enter in LP Vdd ON or LP Vdd OFF, the wake up flags must be cleared or read. This is done by the following SPI commands: 0xE100 and oxE380 for CAN and I/O wake up respectively. Ref to table "Device Flag, I/O real time and Device Identification" for details. If wake up flags are not cleared, device will enter in selected LP mode but will wake up immediately. When the device is in LP Vdd ON mode, the wake up by SPI command uses a write to "Normal Request Mode", 0x5C10.
Mode Register Features The mode register include specific function and "global SPI command" that allow the following: - read device current mode - read device Debug status - read state of SAFE terminal - leave Debug state - release or turn off SAFE terminal These global commands are built using the MODE register adress bit [13-9], along with several combinations of bit [1514] and bit [7]. Note that bit [8] is always set to 1. The table below summarize these commands
Table 27. Device Modes
Global commands and effects Read device current Mode, Leave debug mode. Keep SAFE terminal as is. MOSI in hexadecimal: 1D 00 MOSI bits 15-14 00 MISO bits 13-9 01 110 bit 15-8 bit 8 1 bit 7-3 device current mode bit 8 1 bit 7-3 device current mode bit 8 1 bit 7-3 device current mode bit 8 1 bit 7-3 device current mode bit 7 1 bit 2 X bit 7 0 bit 2 X bit 7 1 bit 7 0 bits 6-0 000 0000 bit 2-0 Random code bits 6-0 000 0000 bit 2-0 Random code bits 6-0 000 0000 bit 1 SAFE bits 6-0 000 0000 bit 1 SAFE bit 0 DEBUG bit 0 DEBUG
Fix Status
Read device current mode Release SAFE terminal (turn OFF). MOSI in hexadecimal: 1D 80 MOSI bits 15-14 00 MISO bits 13-9 01 110 bit 15-8
Fix Status
Read device current Mode, Leave debug mode. Keep SAFE terminal as is. MOSI in hexadecimal: DD 00 MISO reports Debug and SAFE state (bits 1,0) MOSI bits 15-14 11 MISO bits 13-9 01 110 bit 15-8
Fix Status
Read device current mode, Keep DEBUG mode Release SAFE terminal (turn OFF). MOSI in hexadecimal: DD 80 MISO reports Debug and SAFE state (bits 1,0) MOSI bits 15-14 11 MISO bits 13-9 01 110 bit 15-8
Fix Status Tables below describe the meaning of MISO bits 7-0, that allow to decode the device current mode. Table 28. MISO bits 7-0
Device current mode, any of the above command b7, b6, b5, b4, b3 0 0000 0 0001 0 0010 0 0011 MODE INIT FLASH Normal Request Normal mode
Table below describes the SAFE and DEBUG bit decoding. Table 29. SAFE and DEBUG status
SAFE and DEBUG bits b1 0 1 b0 0 1 DEBUG mode OFF DEBUG mode Active description SAFE terminal OFF, not activated FLASH
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.REGULATOR, CAN, I/O, INT AND LIN REGISTERS
Table 30. (25)REGULATOR register, REG
MOSI First Byte [15-8] [b_15 b_14] 01_111 [P/N] 01 01_ 111 P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 VAUX[1] 0 POR bit 6 VAUX[0] 0 bit 5 N/A bit 4 5V-can[1] 0 POR bit 3 5V-can[0] 0 bit 2 VDD bal en N/A bit 1 VDD bal auto N/A bit 0 VDD off en N/A
Bits
b7 b6 00 01
Description VAUX[1], VAUX[0] - Vauxilary regulator control Regulator OFF Regulator ON. Under-voltage (UV) and Over-current (OC) monitoring flags not reported. VAUX disable in case UV or UV detected after 1.0ms blanking time. Regulator ON. Under-voltage (UV) and Over-current (OC) monitoring flags active. VAUX disable in case UV or UV detected after 1.0ms blanking time. Regulator ON. Under-voltage (UV) and Over-current (OC) monitoring flags active. VAUX disable in case UV or UV detected after 25s blanking time. 5V-can[1], 5V-can[0] - 5V-CAN regulator control Regulator OFF Regulator ON. Thermal protection active. Under-voltage (UV) and Over-current (OC) monitoring flags not reported. Regulator ON. Thermal protection active. Under-voltage (UV) and Over-current (OC) monitoring flags active. Regulator ON. Thermal protection active. Under-voltage (UV) and Over-current (OC) monitoring flags active. 5V-CAN disable in case UV or UV detected after 25s blanking time. VDD bal en - Control bit to Enable the VDD external ballast transistor External VDD ballast disable External VDD ballast Enable VDD bal auto - Control bit to automatically Enable the VDD external ballast transistor, if VDD is > typ 60mA Disable the automatic activation of the external ballast Enable the automatic activation of the external ballast, if VDD > typ 60mA VDD off en - Control bit to allow transition into Low Power VDD OFF Mode (to prevent VDD turn OFF) Disable Usage of Low Power VDD OFF Mode Enable Usage of Low Power VDD OFF Mode
10
11
b4 b3 00 01 10 11
b2 0 1 b1 0 1 b0 0 1
Notes 25. The first time the device is set in Normal mode, the CAN is in Sleep wake-up enable (10). The next time the device is set in Normal mode, the CAN state is controlled by the bit 7 and bit6 states.
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Table 31. CAN Register, CAN
MOSI First byte [15-8] [b_15 b_14] 10_000 [P/N] 01 10_ 000P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 CAN mod[1] 1 note bit 6 CAN mod[0] 0 bit 5 Slew[1] 0 POR bit 4 Slew[0] 0 bit 3 Wake up 1/3 0 POR bit 2 bit 1 bit 0 CAN int 0 POR
Bits b7 b6 00 01 10
Description
CAN mod[1], CAN mod[0] - CAN interface mode control, wake-up enable / disable CAN interface in Sleep Mode, CAN wake-up disable. CAN interface in receive only mode, CAN driver disable. CAN interface is in Sleep Mode, CAN wake-up enable. In device low power mode, CAN wake-up is reported by device wake-up. In device normal mode, CAN wake-up reported by INT. CAN interface in transmit and receive mode. Slew[1] Slew[0] - CAN driver slew rate selection FAST MEDIUM SLOW SLOW Wake-up 1/3 - Selection of CAN wake-up mechanism 3 dominant pulses wake-up mechanism Single dominant pulse wake-up mechanism CAN INT - Select the CAN failure detection reporting Select INT generation when a bus failure is fully identified and decoded (i.e after 5 dominant pulses on TxCAN) Select INT generation as soon as a bus failure is detected, event if not fully identified
11 b5 b4 00 01 10 11 b3 0 1 b0 0 1
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Table 32. I/O Register, I/O
MOSI First byte [15-8] [b_15 b_14] 10_001 [P/N] 01 10_ 001P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 I/O-3 [1] 0 bit 6 I/O-3 [0] 0 bit 5 I/O-2 [1] 0 bit 4 I/O-2 [0] 0 POR bit 3 I/O-1 [1] 0 bit 2 I/O-1 [0] 0 bit 1 I/O-0 [1] 0 bit 0 I/O-0 [0] 0
Bits b7 b6 00 01 10 11 b5 b4 00 01 10 11 b3 b2 00 01 10 11 b1 b0 00 01 10 11
Description
I/O-3 [1], I/O-3 [0] - I/O-3 terminal operation I/O-3 driver disable, Wake-up capability disable I/O-3 driver disable, Wake-up capability enable. I/O-3 High Side driver enable. I/O-3 High Side driver enable. I/O-2 [1], I/O-2 [0] - I/O-2 terminal operation I/O-2 driver disable, Wake-up capability disable I/O-2 driver disable, Wake-up capability enable. I/O-2 High Side driver enable. I/O-2 High Side driver enable. I/O-1 [1], I/O-1 [0] - I/O-1 terminal operation I/O-1 driver disable, Wake-up capability disable I/O-1 driver disable, Wake-up capability enable. I/O-1 Low Side driver enable. I/O-1 High Side driver enable. I/O-0 [1], I/O-0 [0] - I/O-0 terminal operation I/O-0 driver disable, Wake-up capability disable I/O-0 driver disable, Wake-up capability enable. I/O-0 Low Side driver enable. I/O-0 High Side driver enable.
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Table 33. INT Register, INT
MOSI First byte [15-8] [b_15 b_14] 10_010 [P/N] 01 10_ 010P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 CAN failure 0 bit 6 MCU req 0 bit 5 LIN1 fail 0 bit 4 LIN0fail 0 POR bit 3 I/O 0 bit 2 SAFE 0 bit 1 0 bit 0 Vmon 0
Bits b7 0 1 b6 0 1 b5 0 1 b4 0 1 b3 0 1 b2 0 1 b0
Description
CAN failure - control bit for CAN failure INT (CANH/L to GND, VDD or VSUP, CAN over-current, Driver Over Temp, TX-PD, RX-PR, RX2HIGH, and CANBUS Dominate clamp) INT disable INT enable. MCU req - Control bit to request an INT. INT will occur once when the bit is enable INT disable INT enable. not implemented in MC33904 INT disable INT enable. not implemented in MC33904 INT disable INT enable. I/O - Bit to control I/O interruption: I/O Wake-up INT disable INT enable. SAFE - description to be done INT disable INT enable. Vmon - enable interruption by voltage monitoring of one of the voltage regulator: VAUX, 5V-CAN, VDD (IDD Over-current, VDD_Temp_prewarning), VSUV, VSOV, VSENSElow, 5V-CAN low or thermal shutdown, VAUX low or VAUX over-current INT disable INT enable.
0 1
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Table 34. LIN 1 Register, LIN1
MOSI First byte [15-8] [b_15 b_14] 10_010 [P/N] 01 10_ 011P Default state Condition for default Bits b7 b6 00 01 10 11 Description MOSI Second Byte, bits 7-0 bit 7 LIN mode[1] 0 bit 6 LIN mode[0] 0 bit 5 Slew rate[1] 0 bit 4 Slew rate[0] 0 POR bit 3 0 bit 2 LIN T1 on 0 bit 1 0 bit 0 Vsup ext 0
LIN mode [1], LIN mode [0] - LIN 1 interface mode control, wake-up enable / disable LIN1 disable, wake-up capability disable not used LIN1 disable, wake-up capability enable LIN1 Transmit Receive mode
b5 b4 00 01 10 11
Slew rate[1], Slew rate[0] LIN 1 slew rate selection Slew rate for 20kbit/s baud rate Slew rate for 10kbit/s baud rate Slew rate for fast baud rate Slew rate for fast baud rate
b2 0 1
LIN T1 on LIN 1 termination OFF LIN 1 termination ON
b0 0 1
Vsup ext LIN goes recessive when device Vsup2 is below typ 6V. This is to meet J2602 specification LIN continues operation below Vsup2 6V, until 5V-CAN is disabled.
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Table 35. LIN 2 Register, LIN2
MOSI First byte [15-8] [b_15 b_14] 10_010 [P/N] 01 10_ 100P Default state Condition for default MOSI Second Byte, bits 7-0 bit 7 LIN mode[1] 0 bit 6 LIN mode[0] 0 bit 5 Slew rate[1] 0 bit 4 Slew rate[0] 0 POR bit 3 0 bit 2 LIN T2 on 0 bit 1 0 bit 0 Vsup ext 0
Bits b7 b6 00 01 10 11
Description
LIN mode [1], LIN mode [0] - LIN 2 interface mode control, wake-up enable / disable LIN2 disable, wake-up capability disable not used LIN2 disable, wake-up capability enable LIN2 Transmit Receive mode
b5 b4 00 01 10 11 b2 0 1 b0 0 1
Slew rate[1], Slew rate[0] LIN 2slew rate selection Slew rate for 20kbit/s baud rate Slew rate for 10kbit/s baud rate Slew rate for fast baud rate Slew rate for fast baud rate LIN T2 on LIN 2 temination OFF LIN 2 temination ON Vsup ext LIN goes recessive when device Vsup2 is below typ 6V. This is to meet J2602 specification LIN continues operation below Vsup2 6V, until 5V-CAN is disabled.
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FLAGS DESCRIPTION
The table below is the summary of the device flags, I/O real time level and device Identification. They are obtained using the following commands. This command is composed of the following: Table 36. Device Flag, I/O real time and Device Identification
Bits 15-14 13-9 8 7 6 5 4 3 2 1 0
bits 15 and 14: [1 1] for failure flags, or [0 0] for I/O real time status or device identification. * bit 13 to 9 are the register address from which the flags is to be read. * bit 8 = 1 (this is not parity bit function, as this is a read command).
MOSI bits 15-7 MOSI bits [15, 14] Address bit 8 [13-9] bit 7 Next 6 MOSI bits (bits 6.0) should be "000_0000"
MISO REG
8 Bits Device Fixed Status (bits 15...8) 11 0_1111 REG 1 0
MISO bits [7-0], device response on MISO terminal bit 7 VAUX_low bit 6 VAUX_overcurrent bit 5 5V-can_ Thermal shutdown bit 4 5V-can_ UV VDD_ Thermal shutdown bit 3 5V-can_ over-current bit 2 VSENSE_ low RST_low (<100ms) bit 1 VSUP_ Undervoltage VSUP_ batfail bit 0 IDD-OCNORMAL mode IDD-OC-LP Vddon mode
11
1
-
-
Hexa SPI commands to get Vreg Flags: MOSI Ox DF 00, and MOSI Ox DF 80 CAN 11 1_0000 CAN 1 0 CAN wake-up CAN_UF CAN Overtemp CANL to VBAT RxD low Rxd high TxD dom Bus Dom clamp CANH to VDD CAN Overcurrent CANH to GND
1
CAN_F
CANL to VDD
CANL to GND
CANH to VBAT
Hexa SPI commands to get CAN Flags: MOSI Ox E1 00, and MOSI Ox E1 80 I/O 11 1_0001 I/O 1 0 1 HS3 short to HS2 short to GND GND I/O-1-3 wake-up SPI parity error CSB low >2ms FWU VSUP2-UV INT service Timeout VSUP1-OV I/O-O thermal Low Power VDD OFF Reset request W/D flash mode 50% Hardware Leave Debug
I/O-0-2 wake- SPI wake-up up
Hexa SPI commands to get I/O Flags and I/O wake up: MOSI Ox E3 00, and MOSI Ox E3 80 00 1_0001 I/O 1 1 I/O-3 state I/O-2 state I/O-1 state I/O-0 state
Hexa SPI commands to get I/O real time level: MOSI Ox 23 00 INT 11 1_0010 Interrupt 1 0 1 INT request RST high DBG resistor VDD temp Prewarning VDD low >100ms VDD UV VDD low RST VDD Overvoltage RST low >100ms VAUX_overvoltage multiple Resets W/D refresh failure
Hexa SPI commands to get INT Flags: MOSI Ox E5 00, and MOSI Ox E5 80 00 1_0010 Interrupt 1 1 Vdd (5V or 3.3V) device p/n 1 device p/n 0 id4 id3 id2 id1 id0
Hexa SPI commands to get device Identification: MOSI Ox 25 10 MISO bit [7-0] = 1011 0001: MC33904, 5V version, silicon pass 3.0 MISO bit [7-0] = 1011 0010: MC33904, 5V version, silicon pass 3.1 LIN1 11 1_0011 LIN 1 1 0 LIN1 wake up LIN1 Term short to gnd LIN 1 Over-temp RxD1 low RxD1 high TxD1 dom LIN1 bus dom clamp
Hexa SPI commands to get LIN 2 Flags: MOSI Ox E7 00 LIN2 11 1_0100 LIN 2 1 0 LIN2 wake up LIN2 Term short to gnd LIN 2 Over-temp RxD2 low RxD2 high TxD2 dom LIN2 bus dom clamp
Hexa SPI commands to get LIN 2 Flags: MOSI Ox E9 00
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Table 37. Flag Descriptions
Flag Description
Vaux_low
Description Set / Reset condition
Reports that VAUX regulator output voltage is lower than the VAUX_UV threshold. Set: VAUX below threshold for t >100s typ. Reset: VAUX above threshold and flag read (SPI) Report that current out of VAUX regulator is above VAUX_OC threshold. Set: Current above threshold for t >100s. Reset: Current below threshold and flag read by SPI. Report that the 5V-can regulator has reached over temperature threshold. Set: 5V-can thermal sensor above threshold. Reset: thermal sensor below threshold and flag read (SPI) Reports that 5V-can regulator output voltage is lower than the 5V-can UV threshold. Set: 5V-can below 5V-can UV for t >100s typ. Reset: 5V-can > threshold and flag read (SPI) Report that the CAN driver output current is above threshold. Set: 5V-can current above threshold for t>100us. Reset: 5V-can current below threshold and flag read (SPI) Reports that Vsense terminal is lower than the Vsense low threshold. Set: Vsense below threshold for t >100s typ. Reset: Vsense above threshold and flag read (SPI) Reports that Vsup1 terminal is lower than the Vsup1 low resoled. Set: Vsup1 below threshold for t >100s typ. Reset: Vsup1 above threshold and flag read (SPI) Report that current out of Vdd pin is higher that Idd-oc threshold, while device is in Normal mode. Set: current above threshold for t>100us typ. Reset; current below threshold and flag read (SPI) Report that the Vdd has reached over temperature threshold, and was turned off. Set: Vdd off due to thermal condition. Reset: Vdd recover and flag read (SPI) Report that the Reset pin has detected a low level, shorter than 100ms Set: after detection of reset low pulse. Reset: Reset pulse terminated and flag read (SPI) Report that the device voltage at Vsup1 pin was below BATFAIL threshold. Set: Vsup1 below BATFAIL. Reset: Vsup1 above threshold, and flag read (SPI) Report that current out of Vdd pin is higher that Idd-oc threshold LP, while device is in Low Power VDD ON Mode. Set: current above threshold for t>100us typ. Reset; current below threshold and flag read (SPI) Report that wake up source is CAN Set: after CAN wake detected. Reset: Flag read (SPI) Report that the CAN interface has reach over temperature threshold. Set: CAN thermal sensor above threshold. Reset: thermal sensor below threshold and flag read (SPI) Report that Rx pin is shorted to gnd. Set: Rx low failure detected. Reset: failure recovered and flag read (SPI) Report that Rx pin is shorted to recessive voltage. Set: Rx high failure detected. Reset: failure recovered and flag read (SPI) Report that Tx pin is shorted to gnd. Set: Tx low failure detected. Reset: failure recovered and flag read (SPI) Report that the CAN bus is dominant for a time longer than tDOM Set: Bus dominant clamp failure detected. Reset: failure recovered and flag read (SPI)
Vaux_overcurrent 5V-can_ Thermal shutdown 5V-can_ UV 5V-can_ over-current VSENSE_ low VSUP_
Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description
Under-voltage Set / Reset condition IDD-OCNORMAL mode VDD_ Thermal shutdown RST_low (<100ms) VSUP_ batfail IDD-OC-LP Vddon mode Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition CAN wake-up CAN Overtemp RxD low Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Rxd high Description Set / Reset condition TxD dom Description Set / Reset condition Bus Dom clamp Description Set / Reset condition
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Table 37. Flag Descriptions
Flag Description
CAN Overcurrent CAN_UF
Description Set / Reset condition Description Set / Reset condition
Report that the CAN current is above CAN over current threshold. Set: CAN current above threshold. Reset: current below threshold and flag read (SPI) Report that the CAN failure detection has not yet identified the bus failure Set: bus failure pre detection. Reset: CAN bus failure recovered and flag read Report that the CAN failure detection has identified the bus failure Set: bus failure complete detetction.Reset: CAN bus failure recovered and flag read Report CAN L short to Vbat failure Set: failure detected. Reset failure recovered and flag read (SPI) Report CAN L short to gnd failure Set: failure detected. Reset failure recovered and flag read (SPI) Report CAN L short to Vbat failure Set: failure detected. Reset failure recovered and flag read (SPI) Report CAN H short to Vbat failure Set: failure detected. Reset failure recovered and flag read (SPI) Report CAN H short to gnd failure Set: failure detected. Reset failure recovered and flag read (SPI) Report CAN H short to Vbat failure Set: failure detected. Reset failure recovered and flag read (SPI) Report I/O-3 high side switch short to gnd failure Set: failure detected. Reset failure recovered and flag read (SPI) Report I/O-2 high side switch short to gnd failure Set: failure detected. Reset failure recovered and flag read (SPI) Report SPI parity error was detected. Set: failure detected. Reset: flag read (SPI) Report SPI CSB was low for a time longer than typ 2ms Set: failure detected. Reset: flag read (SPI) Report that VSUP2 is below VSUP2-UV threshold. Set VSUP2 below VSUP2-UV thresh. Reset VSUP2 > VSUPUV thresh and flag read (SPI) Report that VSUP1 is above VSUP1-OV threshold. Set VSUP1 above VSUP1-OV thresh. Reset VSUP1 < VSUPOV thresh and flag read (SPI) Report that the I/O-0 high side switch has reach over temperature threshold. Set: I/O-0 high side switch thermal sensor above threshold. Reset: thermal sensor below threshold and flag read (SPI) Report that the W/D period has reach 50% of its value, while device is in Flash mode. Set: W/D period > 50%. Reset: flag read Report that wake up source is I/O-1 or I/O-3 Set: after I/O-1 or I/O-3 wake detected. Reset: Flag read (SPI) Report that wake up source is I/O-0 or I/O-2 Set: after I/O-0 or I/O-2 wake detected. Reset: Flag read (SPI) Report that wake up source is SPI command, in Low Power VDD ON Mode. Set: after SPI Wake Up detected. Reset: Flag read (SPI)
CAN_F
Description Set / Reset condition
CANL to VBAT
Description Set / Reset condition
CANL to GND Description Set / Reset condition CANL to GND Description Set / Reset condition CANH to VBAT Description Set / Reset condition
CANH to GND Description Set / Reset condition CANH to GND Description Set / Reset condition HS3 short to GND HS2 short to GND SPI parity error Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition
CSB low >2ms Description Set / Reset condition
VSUP2-UV
Description Set / Reset condition
VSUP1-OV I/O-O thermal
Description Set / Reset condition Description Set / Reset condition
W/D flash mode 50% I/O-1-3 wakeup I/O-0-2 wakeup SPI wake-up
Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition
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SERIAL PERIPHERAL INTERFACE FLAGS
Table 37. Flag Descriptions
Flag Description
FWU
Description Set / Reset condition
Report that wake up source is Forced Wake Up Set: after Forced Wake Up detected. Reset: Flag read (SPI) Report that INT time out error detected. Set: INT service time out expired. Reset: flag read. Report that Low Power VDD OFF Mode was selected, prior wake up occurred. Set: Low Power VDD OFF selected. Reset: Flag read (SPI) Report that RST source is an request from a SPI command (go to RST mode). Set: After reset occurred due to SPI request. Reset: flag read (SPI) Report that the device left the Debug mode due to Hardware cause (voltage at DBG pin lower than typ 8V). Set: device leave debug mode due to Hardware cause. Reset: flag read. Report that INT source is an INT request from a SPI command. Set: INT occurred. Reset: flag read (SPI) Report that RST pin is shorted to high voltage. Set: RST failure detection. Reset: flag read. Report that the resistor at DBG pin is different from expected (different from SPI register content). Set: failure detected. Reset: correct resistor and flag read (SPI). Report that the Vdd has reached over temperature pre warning threshold. Set: Vdd thermal sensor above threshold. Reset: Vdd thermal sensor below threshold and flag read (SPI) Reports that VDD terminal is lower than the VDDUV threshold. Set: VDD below threshold for t >100s typ. Reset: VDD above threshold and flag read (SPI) Reports that VDD terminal is higher than the typ Vdd + 0.6V threshold. I/O-1 can be turned OFF if this function is selected in INIT register. Set: VDD above threshold for t >100s typ. Reset: VDD below threshold and flag read (SPI) Reports that Vaux terminal is higher than the typ Vaux + 0.6V threshold. I/O-1 can be turned OFF if this function is selected in INIT register. Set: Vaux above threshold for t >100s typ. Reset: Vaux below threshold and flag read (SPI) Reports that VDD terminal is lower than the VDDUV threshold for a time longer than 100ms Set: VDD below threshold for t >100ms typ. Reset: VDD above threshold and flag read (SPI) Report that Vdd is below Vdd undervoltage threshold. Set: Vdd below threshold. Reset: fag read (SPI) Report that the Reset pin has detected a low level, longer than 100ms (Reset permanent low) Set: after detection of reset low pulse. Reset: Reset pulse terminated and flag read (SPI) Report that the more than 8 consecutive reset pulses occurred, due to missing or wrong W/D refresh. Set: after detection of multiple reset pulses. Reset: flag read (SPI) Report that a wrong or missing W/D failure occurred. Set: failure detected. reset: flag read (SPI) Report that wake up source is LIN1 or LIN2 Set: after LIN1 or LIN 2 wake detected. Reset: Flag read (SPI) Report LIN term 1 or LIN term 2 short to gnd failure Set: failure detected. Reset failure recovered and flag read (SPI)
INT service Timeout Low Power VDD OFF Reset request
Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition
Hardware Leave Debug
Description Set / Reset condition
INT request
Description Set / Reset condition
RST high
Description Set / Reset condition
DBG resistor
Description Set / Reset condition
VDD temp Prewarning
Description Set / Reset condition Description Set / Reset condition
VDD UV
VDD Overvoltage
Description Set / Reset condition
VAUX_overvoltage
Description Set / Reset condition
VDD low >100ms VDD low
Description Set / Reset condition Description Set / Reset condition
RST low >100ms multiple Resets W/D refresh failure LIN1/2 wake up LIN1/2 Term short to gnd
Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition Description Set / Reset condition
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Table 37. Flag Descriptions
Flag Description
LIN 1 Over-temp RxD1 low
Description Set / Reset condition Description Set / Reset condition
Report that the LIN1 or LIN 2 interface has reach over temperature threshold. Set: LIN1 /LIN2 thermal sensor above threshold. Reset: sensor below threshold and flag read (SPI) Report that RxD1 / RxD2 pin is shorted to gnd. Set: Rx low failure detected. Reset: failure recovered and flag read (SPI) Report that RxD1 / RxD2 pin is shorted to recessive voltage. Set: Rx high failure detected. Reset: failure recovered and flag read (SPI) Report that TxD1 / RxD2 pin is shorted to gnd. Set: Tx low failure detected. Reset: failure recovered and flag read (SPI) Report that the LIN1 / LIN2 bus is dominant for a time longer than tDOM Set: Bus dominant clamp failure detected. Reset: failure recovered and flag read (SPI)
RxD1 high
Description Set / Reset condition
TxD1 dom
Description Set / Reset condition
LIN1 bus dom clamp
Description Set / Reset condition
FIX AND EXTENDED DEVICE STATUS
For every SPi command the device response on MISO is a fix status information. This information is either: two bytes Fix Status + Extended Status: when a device write command is used (MOSI bits 15-14, bits C1 C0 = 01) Table 38. status bits description
Bits MOSI 15 INT 14 WU 13 RST 12 CAN-G 11 LIN-G 10 I/O-G 9 8
one byte Fix Status: when a device read operation is performed (MOSI bits 15-14, bits C1 C0 = 00 or 11).
7 CANBUS
6 CANLOC
5 LIN1
4 LIN0
3 I/O-1
2 I/O-0
1
0
SAFE-G VREGG
VREG-1 VREG0
Bits
INT WU RST CAN-G I/O-G SAFE-G VREG-G CAN-LOC CAN-BUS I/O-1 I/I-0 VREG-1 VREG-0
Description Indicate that an INT has occurred and that INT flags are pending to be read. Indicate that an Wake Up has occurred and that Wake Up flags are pending to be read. Indicate that an Reset has occurred and that the flags that report the Reset source are pending to be read. The INT, or WU or RST source is CAN interface. CAN local or CAN bus source. The INT, or WU or RST source is I/O interfaces. The INT, or WU or RST source is from a SAFE condition The INT, or WU or RST source is from a Regulator event, or voltage monitoring event The INT, or WU or RST source is CAN interface. CAN local source. The INT, or WU or RST source is CAN interface. CAN bus source. The INT, or WU or RST source is I/O interface, flag from I/O sub adress Low (bit 7 =0) The INT, or WU or RST source is I/O interface, flag from I/O sub adress High (bit 7 =1) The INT, or WU or RST source is from a Regulator event, flag from REG register sub adress high (bit 7 =1) The INT, or WU or RST source is from a Regulator event, flag from REG register sub adress low (bit 7 =0)
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TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
* = Optional
Q2 <10k VBAT D1 VSUP 22uF
(26)
5.0 V (3.3 V) >2.2uF
VBAUX VCAUX VAUX VSUP2
VE
Q1*
RF module Switch Detection Interface eSwitch Safing Micro Controller CAN xcvr
100nF >1uF
VSUP1 DBG
VB VDD >4.7uF RST INT MUX MOSI SCLK MISO CS TXD RXD TXDL1 RXDL1 TXDL2 RXDL2 4.7k *
VDD RST INT A/D
VBAT
1k 22k
5V-CAN VSENSE I/O-0
100nF 100nF
VSUP
MCU
SPI
I/O-1 CANH 60 SPLIT CAN BUS VSUP1/2 1.0 k LIN BUS 1
option 1 option 2
CAN LIN1
60
4.7nF CANL LIN TERM1
LIN2
1.0 k LIN1
VSUP1/2 1.0 k LIN BUS 1
option 1 option 2
LIN TERM2 1.0 k LIN2 GND SAFE VSUP VSUP
Safe Circuitry Notes 26. Cap > 10uF required to pass EMC requirement according to "OEM_HW_Requirement-For CAN_LIN_FR-interface_V10_20081210" or newer
Figure 36. 33905D Typical Application Schematic
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TYPICAL APPLICATIONS
* = Optional
Q2 <10k VBAT D1 VSUP 22uF
(27)
5.0 V (3.3 V) >2.2uF
VBAUX VCAUX VAUX VSUP2 100nF >1uF VSUP1 DBG
Q1* VE VB
RF module Switch Detection Interface eSwitch Safing Micro Controller CAN xcvr
VDD >4.7uF RST INT MUX MOSI SCLK MISO CS TXD RXD TXDL1 RXDL1 4.7k *
VDD RST INT A/D
VBAT
1k 22k
5V-CAN VSENSE
100nF I/O-0 100nF I/O-1
VSUP
MCU
SPI
VSUP I/O-3 CANH 60 SPLIT 60 CAN BUS 4.7nF CANL LIN TERM1 1.0 k LIN BUS 1
option 1 option 2
CAN LIN1
VSUP1/2 1.0 k
LIN1 GND
SAFE
VSUP
VSUP
Safe Circuitry
Notes 27. Cap > 10uF required to pass EMC requirement according to "OEM_HW_Requirement-For CAN_LIN_FR-interface_V10_20081210" or newer
Figure 37. 33905S Typical Application Schematic
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TYPICAL APPLICATIONS
* = Optional
Q2 <10k VBAT D1 VSUP 22uF
(28)
5V (3.3 V) >2.2uF
VBAUX VCAUX VAUX VE VSUP2 VB VDD
Q1*
RF module Switch Detection Interface eSwitch Safing Micro Controller CAN xcvr
100nF
VSUP1 DBG 5V-CAN VSENSE I/O-0
VDD >4.7uF RST INT A/D 4.7k * SPI
VBAT
1k 22k
>1uF
RST INT MUX MOSI SCLK MISO CS TXD RXD
100nF
VSUP
1k 100nF
MCU
I/O-1 VBAT 22k VSUP 1k I/O-2 100nF I/O-3 CANH 60 60 CAN BUS 4.7nF SPLIT CANL GND
CAN
SAFE VSUP VSUP
OR function
Safe Circuitry
Notes 28. Cap > 10uF required to pass EMC requirement according to "OEM_HW_Requirement-For CAN_LIN_FR-interface_V10_20081210" or newer
Figure 38. 33904A Typical Application Schematic
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TYPICAL APPLICATIONS
The following figure illustrates the application case where 2 reverse battery diodes can be used for optimization of the filtering and buffering capacitor at the VDD pin. This allows using a minimum value capacitor at the VDD pin to guarantee reset free operation of the MCU during the Q2 5 V/3.3 V VBAT D1
VBAUX VCAUX VSUP2 VSUP1 VAUX
cranking pulse, and temporary (50 ms) loss of the VBAT supply. Applications without an external ballast on VDD and without using the VAUX regulator are illustrated as well.
VBAT D2 C2
Q2 5 V/3.3 V
VBAUX VCAUX VAUX VSUP2 VSUP1
Q1
VE VB VDD
D1 C1
Q1
VE VB VDD
Partial View
ex1: Single VSUP Supply
Partial View
ex2: Split VSUP Supply
Optimized solution for cranking pulses. C1 is sized for MCU power supply buffer only.
Q2 5 V/3.3 V VBAT D1
VBAUX VCAUX VAUX VSUP2 VSUP1 VE VB VDD
VBAT D1
VBAUX VCAUX VAUX VSUP2 VSUP1 VE VB VDD
Partial View
ex 3: No External Transistor, VDD ~100 mA Capability delivered by internal path transistor.
Partial View
ex 4: No External Transistor - No VAUX
Figure 39. Application Options
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PACKAGING SOIC 32 PACKAGE DIMENSIONS
PACKAGING
SOIC 32 PACKAGE DIMENSIONS
For the most current package revision, visit www.freescale.com and perform a keyword search using the "98A" listed below.
EK SUFFIX (PB-FREE) 32-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10556D REVISION D
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PACKAGING SOIC 32 PACKAGE DIMENSIONS
EK SUFFIX (PB-FREE) 32-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10556D REVISION D
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PACKAGING SOIC 32 PACKAGE DIMENSIONS
EK SUFFIX (PB-FREE) 32-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10556D REVISION D
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PACKAGING SOIC 54 PACKAGE DIMENSIONS
SOIC 54 PACKAGE DIMENSIONS
EK SUFFIX (PB-FREE) 54-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10506D REVISION D
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PACKAGING SOIC 54 PACKAGE DIMENSIONS
EK SUFFIX (PB-FREE) 54-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10506D REVISION D
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PACKAGING SOIC 54 PACKAGE DIMENSIONS
EK SUFFIX (PB-FREE) 54-PIN SOIC WIDE BODY EXPOSED PAD 98ASA10506D REVISION D
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REVISION HISTORY
REVISION HISTORY
REVISION 1.0 2.0
DATE 11/2009 1/2010
DESCRIPTION OF CHANGES * * * * * * * * Initial Release Updated LIN 2.0 to LIN 2.1 throughout document Changed Pin VC to VE Changed Pin VBASE to VB Added note to Simplified Application and Typical Application drawings for Q1 to be optional. Updated Parameters Tables.; Timing accuracy added, CAN wake and CANL/CANH input current. Changed default setting of: INIT Reg register, bit7, I/Ox sync - INIT W/D register, bit 6 MCU_OC and bit 1 W/D N/Win Re-arranged the order of the devices.
3.0
2/2010
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MC33904_5 Rev. 3.0 2/2010

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