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W83L786NR W83L786NG Winbond H/W Monitoring IC
W83L786NR/ W83L786NG
W83L786NR Data Sheet Revision History
PAGES DATES VERSION VERSION ON WEB MAIN CONTENTS
Pin 10: from Vram_SEN to VTIN1 Pin 11: from Vcore_SEN to D1 P.13 10/15/04 0.6 N/A Pin 13: from Vref to Vcore_SEN Pin 14: from D- to Vram_SEN Pin 15: from D1+ to Vref 2 3 4 5 Please note that all data and specifications are subject to change without notice. All the trademarks of products and companies mentioned in this data sheet belong to their respective owners. P.14, P.18, P.51, P.55 P.1, P.3, P.5, P.9 N.A. 11/15/04 07/04/05 03/31/06 0.7 0.8 0.9 N/A N/A N/A Add pin function description, functional description, electrical characteristics and top marking explanation Correct temp. sensor measurement method Add Pb-free package version; remove application circuit
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
Table of Contents1. 2. GENERAL DESCRIPTION ......................................................................................................... 1 FEATURES ................................................................................................................................. 2 2.1 Monitoring Items .............................................................................................................. 2
2.1.1 2.1.2 2.1.3 Temperature.....................................................................................................................2 Voltage .............................................................................................................................2 Fan ...................................................................................................................................2
2.2 2.3 2.4 3. 4. 5. 6. 7.
Actions Enabling .............................................................................................................. 2 General ............................................................................................................................ 2 Package ........................................................................................................................... 2
KEY SPECIFICATIONS .............................................................................................................. 3 BLOCK DIAGRAM ...................................................................................................................... 3 PIN CONFIGURATION ............................................................................................................... 4 PIN DESCRIPTION..................................................................................................................... 5 FUNCTIONAL DESCRIPTION.................................................................................................... 8 7.1 7.2 7.3 7.4 General Description ......................................................................................................... 8 Access Interface .............................................................................................................. 8 The First Serial Bus Access Timing................................................................................. 8 Analog Inputs ................................................................................................................... 9
7.4.1 7.4.2 Voltage Input can not be over 2.048V ............................................................................10 Voltage Fault (VOLTAGE_FAULT #)..............................................................................10 Monitor Temperature from Thermistor............................................................................11 Monitor Temperature from Thermal Diode .....................................................................11 Temperature Fault (TEMP_FAULT #) ............................................................................12 Fan Speed Count ...........................................................................................................12 Fan Speed Control .........................................................................................................14 SMART FANTM I Control ...............................................................................................16 SMART FANTM II Control ..............................................................................................17 Fan Fault (FAN_FAULT #) .............................................................................................19 Temperature...................................................................................................................19 Voltage ...........................................................................................................................21 Fan .................................................................................................................................21
7.5
Temperature Measurement Machine............................................................................. 11
7.5.1 7.5.2 7.5.3
7.6
FAN Speed Count and FAN Speed Control .................................................................. 12
7.6.1 7.6.2 7.6.3 7.6.4 7.6.5
7.7
Fault Signal--INT#......................................................................................................... 19
7.7.1 7.7.2 7.7.3
8.
CONTROL AND STATUS REGISTER ..................................................................................... 22
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W83L786NR/ W83L786NG
8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.11 8.12 8.13 8.14 8.15 8.16 8.17 8.18 8.19 8.20 8.21 8.22 8.23 8.24 8.25 8.26 8.27 8.28 8.29 8.30 8.31 8.32 Configuration Register - Index 40h ................................................................................ 22 INT# Status Register 1 - Index 41h ............................................................................... 22 INT# Status Register 2 - Index 42h ............................................................................... 23 INT# Mask Register 1 - Index 43h ................................................................................. 23 INT# Mask Register 2 - Index 44h ................................................................................. 23 Register - Index 45h....................................................................................................... 24 Register - Index 46h....................................................................................................... 24 GPIO/GPO Function Enable Control Register - Index 47h............................................ 24 Register - Index 48h....................................................................................................... 24 GPIO1-2 & 5-7 I/O Mode Control Register - Index 49h ................................................. 25 GPO3-4 Output Data Register - Index 4Ah ................................................................... 25 GPIO1-2 & 5-7 Data Register - Index 4Bh..................................................................... 26 Winbond Vendor ID (Low Byte) - Index 4Ch.................................................................. 26 Winbond Vendor ID (High Byte) - Index 4Dh................................................................. 26 Chip ID - Index 4Eh........................................................................................................ 26 Register - Index 4Fh ...................................................................................................... 27 Register - Index 50h....................................................................................................... 27 GPIO1-2 & 5-7 Output Mode Control Register - Index 51h ........................................... 27 INT# Property Select - Index 52h .................................................................................. 28 Thermal Sensor 1/2 Type Register - Index 53h............................................................. 28 Fan Divisor Register - Index 54h ................................................................................... 29 Reserved - Index 55h ~ 5Fh .......................................................................................... 29 FAN Configuration Register - Index 80h........................................................................ 30 DC FAN1 Output Voltage Level Control Register (Manual Mode) / FAN1 Output Voltage Table (SMART FANTM II Mode) - Index 81h ................................................................. 30 FAN1 Output Voltage Table (SMART FANTM II Mode) - Index 82h ............................. 31 TEMP0 (D+_D-) Target Temperature Register (Thermal Cruise Mode) / TEMP_POINT1 for FAN1 (SMART FANTM II Mode) - Index 83h............................................................. 31 TEMP_POINT2 for FAN1 (SMART FANTM II Mode) - Index 84h................................. 31 FAN 1 Speed Low Limit Rate Control Register (Thermal Cruise Mode) / TEMP_POINT3 for FAN1 (SMART FANTM II Mode) - Index 85h................................... 32 TEMP_POINT4 for FAN1 (SMART FANTM II Mode) - Index 86h................................. 32 DC FAN2 Output Voltage Level Control Register (Manual Mode)/ FAN2 Output Voltage Table (SMART FANTM II Mode) - 87h ............................................................................ 32 FAN2 Output Voltage Table (SMART FANTM II Mode) - Index 88h ............................. 33 TEMP1 (VTIN1) Target Temperature Register (Thermal Cruise Mode) / TEMP_POINT1 for FAN2 (SMART FANTM II Mode) - Index 89h................................... 33
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
8.33 8.34 8.35 8.36 8.37 8.38 8.39 8.40 8.41 8.42 8.43 8.44 8.45 8.46 8.47 9. 9.1 9.2 9.3 TEMP_POINT2 for FAN2 (SMART FANTM II Mode) - Index 8Ah ................................ 33 FAN 2 Speed Low Limit Rate Control Register/ TEMP_POINT3 for FAN2 SMART FANTM II Mode) - Index 8Bh........................................................................................... 34 TEMP_POINT4 for FAN2 (SMART FANTM II Mode) - Index 8Ch ................................ 34 Tolerance of Temperature Register - Index 8Dh ........................................................... 34 FAN 2D/3D state Control Register - Index 8Eh ............................................................. 35 FAN Pre-Scale Register - Index 8Fh ............................................................................. 35 FAN Initial Output Value - Index90h ............................................................................. 36 Fan Step down Time Register - Index 91h .................................................................... 36 Fan Step up Time Register - Index 92h......................................................................... 36 Temperature Sensor 0 (D+_D-) Offset Register - Index 93h......................................... 37 Temperature Sensor 1 (VTIN1) Offset Register - Index 94h ........................................ 37 Register - Index 95h....................................................................................................... 37 Register - Index 96h....................................................................................................... 38 Register - Index 97h....................................................................................................... 38 Value RAM - Index 20h- 3Fh or 60h - 7Fh..................................................................... 38 Absolute Maximum Ratings ........................................................................................... 40 DC Characteristics ......................................................................................................... 40 AC Characteristics ......................................................................................................... 42
9.3.1 9.3.2 Serial Bus Timing Diagram.............................................................................................42 VID Input Skew...............................................................................................................42
ELECTRICAL CHARACTERISTICS......................................................................................... 40
10. 11.
THE TOP MARKING................................................................................................................. 43 PACKAGE SPECIFICATION .................................................................................................... 44
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W83L786NR/ W83L786NG
1. GENERAL DESCRIPTION
W83L786NR/NG is an evolving product of W83L785R -- Winbond's most popular hardware monitoring IC, and intelligent fan controlling IC. Specifically designed for the graphic cards and barebone /mini systems, W83L786NR/NG can be used to monitor several critical hardware parameters of the system, including voltages, fan speeds, and temperatures, which are very important for the system to work stably and properly. W83L786NR/NG can monitor up to 3 analog voltage inputs, 2 fan tachometer inputs, and 2 remote temperature sensors. One of the temperature inputs is connected to CPU/GPU thermal diode sensor, and the other remote temperature sensor could be performed by either thermal diode or thermistor. Power-on fan_set configuration offers the function to choose one of the four duty cycles, 100%, 81%, 62%, 43%, as initial fan speed. 2 sets of PWM (Pulse Width Modulation) / DC (Direct Current) fan output for SMART FANTM control - "Thermal CruiseTM" mode and "SMART FANTM II "mode. Under "Thermal CruiseTM "mode, temperatures of GPU and the system can be maintained within specific programmable ranges under the hardware control. Under "SMART FANTM II" mode, the fan could be operated at the lowest possible speed for minimum acoustic noise, and the dynamic intelligent fan management could create the most quiet system environment and stable working performance. An 8bit analog-to-digital converter (ADC) is built inside W83L786NR/NG. As for warning mechanism, W83L786NR/NG provides four pure hardware event pins for independent warning signals: VOLTAGE_FAULT#, FAN_FAULT#, TEMP_FAULT#, and INT#. All threshold values could be set for system protection without any timing delay. One bit power-on address selection is used to decide the address of the W83L786NR/NG over I2C serial bus interface. W83L786NR/NG also provides up to 7 optional multifunctional GPIO. W83L786NR/NG is powered by 3.3V. Through the application software or BIOS, the users can read all the monitored parameters of system from time to time. A pop-up warning can also be activated when the monitored item is out of the proper / preset range. The application software could be Winbond's Hardware DoctorTM, IntelTM LDCM (LanDesk Client Management), or other management application software. Also the users can set up the upper and lower limits (alarm thresholds) of these monitored parameters and activate one programmable interrupts. For the spacing saving consideration of the Graphic cards and Notebook system, W83L786NR/NG is 20-pin SSOP package.
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
2. FEATURES
2.1
2.1.1
Monitoring Items
Temperature Measure the temperature with high accuracy. One thermal diode sensor (current mode) connected to CPU/GPU and one remote sensor either by thermal diode (current mode) or thermistor. Programmable hysteresis and setting points (alarm thresholds) for all monitored items. Voltage 3 voltage sensor inputs. --- Typically for Vcore, RAM, etc. Fan 3D/2D application being used and transferring fan set to the most appropriate fan speed control. Fan set: power on configuration for fan speed at four rotation rate levels at 43%, 62%, 81%, and 100% duty cycle. Two DC/PWM fan output control. SMART FANTM function compliant.
2.1.2 2.1.3
2.2
Actions Enabling
Total up to 2 sets of fan speed monitoring and controlling. Issue FAN_FAULT#, VOLTAGE_FAULT#, TEMP_FAULT#, and INT# signals to activate system protection. Warning signal pop-up in application software.
2.3
General
Interface: IC / SMBus control. 1 bit I2C address selection. Up to 7 GPIOs. Winbond hardware monitoring application software (Hardware DoctorTM) support Windows 95 / 98 / 2000 / XP and Windows NT 4.0 / 5.0. 3.3V VCC operation.
2.4
Package
20-pin SSOP (209mil).
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W83L786NR/ W83L786NG
3. KEY SPECIFICATIONS
Voltage monitoring accuracy Monitoring temperature range and accuracy Supply voltage Operating supply current Power down supply current ADC resolution 3% (typ.) 0C to +160C; 3C (max.) 3.3V10% 2 mA (typ.) 10 uA (typ.) 8 Bits
4. BLOCK DIAGRAM
V c o re
DDR RAM OR O T H E R D E V IC E POW ER PW M D-
GPU D+
R e m o te T h e r m is t o r
V T IN 1
VREF
G P U D IO D E SENSOR G P IO G P IO
THERM AL SENSOR
IN T # FAN _FAU LT# VO LTAG E_FAU LT# TEM P_FAU LT# FAN CONTROL F a u lt D e t e c t o r
C O N T R O L L O G IC & R E G IS T E R
I2 C VO LTAG E SENSOR
FAN _SET ( IN IO U T _ G P O ) V CC
GND
F A N IN 1 F A N IN 2 V c o re _ S E N
SDA SCL ADDR
FANOUT1 FAN 1 FAN 2 FANOUT2
V RAM _S E N
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
5. PIN CONFIGURATION
FAN_FAULT/GPIO1 TEMP_FAULT#/GPIO2 SCL SDA Vcc ADDR/GPO3 FAN_SET/GPO4 FANIN1 FANIN2/GPIO5 VTIN1
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VOLTAGE_FAULT#/GPIO7 INT# PWM/DC_OUT2/GPIO6 PWM/DC_OUT1 GND VREF VRAM_SEN VCORE_SEN D+ D-
W83L786NR
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W83L786NR/ W83L786NG
6. PIN DESCRIPTION
PIN TYPE PIN ATTRIBUTE
I/O12t I/O12ts I/O8ts I/O6ts I/OD12ts OUT12 OD12 AOUT INt INts AIN
TTL level bi-directional pin with 12 mA source-sink capability TTL level and schmitt trigger with 12 mA source-sink capability TTL level and schmitt trigger with 8 mA source-sink capability TTL level and schmitt trigger with 6 mA source-sink capability TTL level and schmitt trigger open drain output with 12 mA sink capability Output pin with 12 mA source-sink capability Open-drain output pin with 12 mA sink capability Output pin (Analog) TTL level input pin TTL level input pin and schmitt trigger Input pin(Analog)
PIN NAME
NO
PIN TYPE
DESCRIPTION
FAN_FAULT# 1 GPIO1
OD12
Active-Low output. This pin will be a logic LOW when the fan1 or fan2 is abnormally stopped. (Default) General purpose I/O function. This multi-functional pin is programmable. Active-Low output. This pin will be a logic LOW when the
I/OD12TS
TEMP_FAULT# 2 GPIO2 SCL 3
OD12
temperature of the system or CPU exceeds its limit. (Default)
I/OD12TS INt s
General purpose I/O function. This multi-functional pin is programmable. Digital Input. SMBus serial clock input. Requires SMBus pull-up. Digital I/O (Open drain). SMBus bidirectional serial data. Requires SMBus pull-up. Power supply input.
SDA Vcc
4 5
I/OD12 POWER
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W83L786NR/ W83L786NG
Continued
PIN NAME
NO
PIN TYPE
DESCRIPTION
ADDR 6 GPO3 INTS/OUT12
Determines the SMBus device address. General purpose Output function. This multi-functional pin is programmable. Determines the FAN initial speed. Power on configuration for fan speed at four rotation rate levels at 43%, 62%, 81%, and 100%. General purpose Output function. This multi-functional pin is programmable. 0V to +3.3V amplitude fan tachometer input. (Default) 0V to +3.3V amplitude fan tachometer input. (Default) General purpose I/O function. This multi-functional pin is programmable. Analog Input. Connect to either diode sensor (current
FAN_SET 7 GPO4 FANIN1 FANIN2 9 GPIO5 8
AIN
OUT12 INTS INTS OUT12TS
VTIN1
10
AIN
mode) or thermistor. Anode to VTIN1 if VTIN1 is connected to diode sensor (current mode). Thermistor 2 terminal input (Default) / Cathode to CPU Thermal Diode. Also cathode to VTIN1 if VTIN1 is connected to diode sensor (current mode). Please connect this pin to the ground, see page 15, figure 5. Thermistor 1 terminal input (Default) / Anode to CPU Thermal Diode. Analog Input. Monitors CPU core voltage (0V-3V).
D-
11
AIN
D+
12
AIN
V CORE _SEN
13
AIN
V RAM _SEN
14
AIN
Analog Input. Monitors RAM's voltage.
VREF
15
AOUT
Reference voltage.
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W83L786NR/ W83L786NG
Continued
PIN NAME
NO
PIN TYPE
DESCRIPTION
GND
16
GROUND
Ground pin for the W83L786NR Fan speed control output. This pin is default DC output level. It can be programmed as PWM output. Fan speed control output. This pin is default DC output level. It can be programmed as PWM output. General purpose I/O function. This multi-functional pin is programmable. System Interrupt. Active-Low output. This pin will be a logic LOW when the voltage exceeds its high/low limit. (Default) General purpose I/O function. This multi-functional pin is programmable..
PWM / DC OUT1
17
OD12
PWM / DC OUT2 18 GPIO6
OD12
I/OD12TS
INT#
19
OD12
VOLTAGE_FAULT# 20 GPIO7
OD12
I/OD12TS
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
7. FUNCTIONAL DESCRIPTION
7.1 General Description
The W83L786NR/NG provides 3 analog voltage inputs, 2 fan speed inputs and outputs which support both PWM (Pulse Width Modulation) fan control and DC (Direct Current) fan control, all of them being implemented with SMART FANTM I and SMART FANTM II, and 2 sets of thermal inputs for CPU/GPU thermal diode sensor or remote temperature sensor. W83L786NR/NG is I2C / SMBus interface compatible. Furthermore, the Watch Dog Timer will monitor every function and store the values to registers for comparison with preset ranges. If the monitored value exceeds the limit value, the interrupt status will be set to 1 and W83L786NR/NG will issue interrupt signals such as INT# and IRQ if not masked. W83L786NR/NG also provides software and hardware Watch Dog Timer to avoid system hang on.
7.2
Access Interface
The W83L786NR/NG provides I2C Serial Bus for microprocessor to read/write internal registers, and the I2C address default value is 01011110b (Pin 6 pull high). If Pin 6 pulls low, the I2C address value is 01011100b.
7.3
The First Serial Bus Access Timing
0 SCL SDA
Start By Master
(a) Serial bus writes to internal address register followed by the data byte
7 8 0 7 8
0
1
0
1
1
0
1
R/W
Ack by 792D
D7
D6
D5
D4
D3
D2
D1
D0
Ack by 792D
Frame 1 Serial Bus Address Byte 0
Frame 2 Internal Index Register Byte 7 8
SCL (Continued) SDA (Continued) D7 D6 D5 D4 D3 D2 D1 D0
Ack by 792D 784R Stop by Master
Frame 3 Data Byte
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
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W83L786NR/ W83L786NG
(b) Serial bus read from a register
0 SCL SDA
Start By Master
7
8
0
7
8
0
1
0
1
1
0
1
R/W
Ack by 792D
D7
D6
D5
D4
D3
D2
D1
D0
Ack by 792D
Frame 1 Serial Bus Address Byte 0
Frame 2 Internal Index Register Byte
0
7
8
0
7
8
0
Repeat start by Master
1
0
1
1
0
1
R/W
Ack by 792D
D7
D6
D5
D4
D3
D2
D1
D0
Nak by Master Stop by Master
Frame 3 Serial Bus Address Byte 0
Frame 4 Data Byte
Figure 2. Serial Bus Read from Internal Address Register
7.4
Analog Inputs
The maximum input voltage of the analog pin is 2.048V because the 8-bit ADC has the 8mV LSB. Actually, the application of the voltage monitoring would most often be connected to power suppliers. The input voltage lower than 2.048V could directly connect to the analog inputs. The inputs voltage higher than 2.048V should be reduced by external resistors so as to meet the input range. This is shown in Figure 3.
VCORE(M ax2.048V) Pin 13 Positive Inputs R1 +2.5V VRAM (M ax2.048V) Pin 14 R2 100K, 1% 8-bit ADC with 8mV LSB
100K, 1%
10K, 1% Typical Therm ister Connection R THM **The connections of D+ is same as VTIN1 10K, 25 C VTIN1
VREF
Pin 15 Pin 10
Figure 3
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
7.4.1 Voltage Input can not be over 2.048V
The input voltage Vcore, and Vram can be expressed as following equation:
VRAM = V+ 2.5V x
R2 R1 + R2
. V+2.5V is +2.5V inputs.
The value of R1 and R2 can be selected to 100K Ohms and 100K Ohms, respectively, when the input voltage is 2.5V. The node voltage of VRAM can be subject to less than 2.048V for the maximum input range of the 8-bit ADC. The pin 5 is connected to the power supply VCC with +3.3V. There are two functions in this pin with 3.3V: the first function is to supply internal analog power of the W83L786NR/NG and the second function is to connect this pin to internal serial resistors to monitor the +3.3V voltage. The values of two serial resistors are 20K ohms and 40K ohms so that input voltage to ADC is 1.1V which is less than 2.048V of ADC maximum input voltage. The express equation can represent as follows.
Vin = VCC x
20 K 1.1V 20 K + 40 K
where VCC is set to 3.3V.
7.4.2
Voltage Fault (VOLTAGE_FAULT #)
W83L786NR/NG provides a good protection for voltage. Set Pin 20 (VOLTAGE_FAULT#) to monitor voltage. When Vcore (Pin13), Vram (Pin14), or VCC (Pin5) voltage exceeds high or low voltage limit in VR2B ~ VR34, Pin 20 VOLTAGE_FAULT# will be asserted (Figure 4).
V o lta g e H ig h lim it
V o lta g e L o w lim it
VOLTAGE_FAULT#
F ig u re 4 . V o lta g e F au lt
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W83L786NR/ W83L786NG
7.5 Temperature Measurement Machine
The temperature data format is 8-bit unsigned for thermal sensor. The 8-bit temperature data can be obtained by reading the VR [25h] or VR [26h]. The format of the temperature data is shown in Table 1.
TEMPERATURE 8-BIT BINARY 8-BIT DIGITAL OUTPUT 8-BIT HEX
+160C +25C +2C +1C +0C
1010,0000 0001,1001 0000,0010 0000,0001 0000,0000 Table 1
A0h 19h 02h 01h 00h
7.5.1
Monitor Temperature from Thermistor
The W83L786NR/NG can connect one thermistor and one thermal diode sensor to measure two different environment temperatures. The specification of thermistor should be considered to (1) value is 3435 K, and (2) resistor value is 10K ohms at 25C. In the Figure 3, the themistor is connected by a serial resistor with 10K Ohms, and then connect to VREF (pin 15).
7.5.2
Monitor Temperature from Thermal Diode
The W83L786NR/NG can alternate the thermistor to thermal diode interface and the circuit connection is shown as Figure 5. The pin of D- is connected to power supply ground (GND) and the pin D+ is connected to pin D+ or VTIN1 in the W83L786NR/NG. The bypass capacitor C=2200pF should be added to filter the high frequency noise.
CPU or G PU T h e r m in a l D io d e
D+
D+ C=2200pF D-
D-
W 83L 786N R
B ip o la r T r a n s is to r T e m p e r a tu r e s e n s o r C=2200pF
V T IN 1
2N 3904
Figure 5
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
7.5.3 Temperature Fault (TEMP_FAULT #)
W83L786NR/NG provides a good protection for temperature fault. Set Pin 2 (TEMP_FAULT#) to monitor temperature. When D+-D- (Pin12, 11), or VTIN1 (Pin10) temperature exceeds temperature fault limit in VR35 or VR37, Pin 2 TEMP_FAULT# will be asserted (Figure 6).
TEM P_FA U LT
lim it
TEM P_FA U LT#
F ig u re 6 . T E M P _ F A U L T
7.6
7.6.1
FAN Speed Count and FAN Speed Control
Fan Speed Count
Inputs are provided by the signals from fans equipped with tachometer outputs. The level of these signals should be set to TTL level, and maximum input voltage cannot be over VCC. If the input signals from the tachometer outputs are over the VCC, the external trimming circuit should be added to reduce the voltage to obtain the input specification. The normal circuit and trimming circuits are shown in Figure 7. Determine the fan counter according to:
Count =
135 x 106 . RPM x Divisor
In other words, the fan speed counter has been read from register VR28 or VR29, and the fan speed can be evaluated by the following equation.
135 x 10 6 . RPM = Count x Divisor
The default divisor is 2 and defined at CR54.bit0~2, bit4~6 which are three bits for divisor. That provides very low speed fan counter such as power supply fan. Table 2 is an example for the relation of divisor, RPM, and count.
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W83L786NR/ W83L786NG
TIME PER REVOLUTION
DIVISOR
NOMINAL RPM
COUNTS
70% RPM
TIME FOR 70%
1 2 (default) 4 8 16 32 64 128
8800 4400 2200 1100 550 275 137 68
6.82 ms 13.64 ms 27.27 ms 54.54 ms 109.08 ms 218.16 ms 436.32 ms 872.64 ms Table 2
153 153 153 153 153 153 153 153
6160 3080 1540 770 385 192 96 48
9.74 ms 19.48 ms 38.96 ms 77.92 ms 155.84 ms 311.68 ms 623.36 ms 1246.72 ms
+12V Pull-up resister 4.7K Ohms
+12V
Pull-up resister < 1K or totem-pole output +12V FAN Out GND 10K 22K~30K Fan Input +12V Pin 8 Pin 9 FAN Out GND > 1K
Fan Input
Pin 8 Pin 9
W83L786NR
3.3V Zener
FAN Connector
W83L786NR
Figure 7-1. Fan with Tach Pull-Up to +12V, or Totern-Pole Output and Register Attenuator
Figure 7-2. Fan with Tach Pull-Up to +12V, or Totem-Pole Putput and Zener Clamp
+5V Pull-up resister 4.7K Ohms
+5V
Pull-up resister < 1K or totem-pole output +5V FAN Out GND 10K 1K~2.7K Fan Input +5V Pin 8 Pin 9 FAN Out GND > 1K
Fan Input
Pin 8 Pin 9
W83L786NR
3.3V Zener
FAN Connector
W83L786NR
Figure 7-3. Fan with Tach Pull-Up to +5V, or Totern-Pole Output and Register Attenuator
Figure 7-4. Fan with Tach Pull-Up to +5V, or Totem-Pole Putput and Zener Clamp
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
7.6.2 Fan Speed Control
The W83L786NR/NG provides two sets for PWM/DC fan speed control. The duty cycle of PWM or the output voltage of DC can be programmed by a 4-bit register. There are four mode to control fan speed which are set by programming CR80 [3:2] and CR [5:4], and default are FAN_SET mode. 7.6.2.1. Default Fan Speed Setting There is a pin to set the default value for fan speed control by adjusting external serial resistors. After power up, the default value will be stored in CR90 (FAN_SET mode). The figure and table are shown below.
VCC Ra FA N _SET Rb
SECTION
FAN SPEED RATE
RA
RB
3 2 1 0
100 81 62 43 Figure 8 OFFSET Setting
9.1K 4.7K 9.1K x
x 9.1K 4.7K 9.1K
7.6.2.2. PWM Mode
Duty - cycle(%) =
Programmed 4 - bit Register Value x 100% 16
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W83L786NR/ W83L786NG
+12V +5V
R1 R2 G D NMOS S PWM Clock Input + C FAN PNP Transistor G
R1 R2 D NMOS S + PNP Transis
PWM Clock Input
C
FAN
Figure 9 7.6.2.3. DC Mode W83L786NR/NG has a 4-bit DAC, which produces 0 to 3.3 voltages DC output that provides maximum 2 sets for fan speed control. The analog output can be programmed in the CR 81, and CR 87 (manual mode). The expression of output voltage can be represented as follows,
OUTPUT Voltage = VCC x
The application circuit is shown as follows,
Programmed 4 - bit Register Value 16
IO+12V
IO+12V
Q1 R1
FANOUT 0 3 2 NPN 4 + LM358 1
C1
0.1U
Tachometer ou
11 IO-12V
R3
47K FAN
3 2 1
R4
33K
Figure 10 Be careful when choosing the OP-AMP and the transistor. The OP-AMP is used for amplify the 5V range of the DC output up to 12V. The transistor should has a suitable
value to avoid its base
current pulling down the OP-AMP 's output and gain the common current to operate the fan at fully
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W83L786NR/ W83L786NG
speed. (For more cost and effort efficient solution please refer to W83391TS/QS - the DC fan predriver that could provide up to 24V gate voltage for external N-channel MOSFET driving)
7.6.3
SMART FANTM I Control
W83L786NR/NG supports two sets SMART FANTM I function and mapping to D+,D- (PWM/DC_OUT1), VTIN1 (PWM/DC_OUT2) . If CR80 [3:2] or CR80 [5:4] set to 2'b10, Fan1 or Fan2 will enable SMART FANTM I function. At this mode, W83L786NR/NG provides the SMART FANTM system to automatically control fan speed to keep the temperatures of CPU and the system within specific range. At first a wanted temperature and interval must be set (ex. 55 C 3 C) by BIOS and the fan speed will be lowered as long as the current temperature remains below the setting value. Once the temperature exceeds the high limit (58C), the fan will be turned on with a specific speed set by BIOS (ex: 80% duty cycle) and automatically controlled its PWM duty cycle with the temperature varying. Three conditions may occur: (1) If the temperature still exceeds the high limit (ex: 58C), PWM duty cycle will increase slowly. If the fan has been operating in its full speed but the temperature still exceeds the high limit (ex: 58C), a warning message will be issued to protect the system. (2) If the temperature goes below the high limit (ex: 58C), but still above the low limit (ex: 52C), the fan speed will be fixed at the current speed because the temperature is in the target range (ex: 52 C ~ 58C). (3) If the temperature goes below the low limit (ex: 52C), PWM duty cycle will decrease slowly to 0 or a preset stop value until the temperature exceeds the low limit. Figure 11-1, 11-2 gives an illustration of Thermal Cruise Mode.
A 58C 55C 52C 100 50 0
B
C
D
PWM Duty Cycle
Fan Start = 20%
Figure 11-1
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W83L786NR/ W83L786NG
D
A 58C 55C 52C PWM 100 Fan Start = 20% Duty Cycle 50 0
B
C
Fan Stop = 10%
Fan Start = 20%
Figure 11-2 Of course, SMART FANTM control system can be disabled and the fan speed control algorithm can be programmed by BIOS or application software.
7.6.4
SMART FANTM II Control
W83786NR/NG provides 4 temperature points each can automatically control PWM or DC fan mode. Each temperature maps different fan out level, the relationship is shown as follows:
Fan Duty Cycle Temp. Tolerance
Fan Duty Cycle 100% Fan Duty Cycle Level 3 Fan Duty Cycle Level 2 Fan Duty Cycle Level 1 Non-Stop Duty Cycle
Temp. 1
Temp.2
Temp.3
Temp.4
Temperature
Figure 12 SMART FANTM II
behaviors
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W83L786NR/ W83L786NG
The SMART FANTM II, a new innovation of Winbond, is specifically designed to operate fans at the lowest possible speed so as to minimize acoustic noise. As the figure shown above, it is clear that SMART FANTM II describes a relationship between Fan PWM Duty Cycle/DC Level and temperature. Users can program CR [80h] to enable SMART FANTM II mode. SMART FANTM II registers allow users to define suitable fan output levels to improve acoustic noise, power consumption and reliability issues regarding to specific fan. Each fan has 4 duty cycle registers and 4 temperature point registers to setup the relation between fan output and temperature. Tolerance registers CR [8Dh] is used to postpone the response of fan output and avoid fan output throttles at each temperature point because fan throttling might produce some undesired noise. The mechanism of SMART FANTM II is described as follows: (1) At first, the fan speed operates at Non-Stop Duty Cycle, and keeps constant while temperature rises. When rising temperature hits critical Temp.1, fan speed remains unchanged. If the temperature keeps on rising and finally hits the upper edge of Temp. Tolerance of Temp.1, it triggers the fan speed change mechanism and fan speed jumps from Non-Stop Duty Cycle to Fan Duty Cycle Level 1. (2) Fan speed remains constant at Fan Duty Cycle Level 1 even though the monitored temperature hits Temp.2. (3) Fan speed will directly jump from Fan Duty Cycle Level 1 to Fan Duty Cycle Level 2 while the monitored temperature hits the upper edge of Temp. Tolerance of Temp.2. (4) Same mechanism happens between Temp.3 and Temp.4. (5) If the monitored temperature between Temp.3 and Temp.4, for example, begins to fall, the fan will keep its speed at Fan Duty Cycle Level 3, which is a constant. (6) If the monitored temperature keeps on falling, the fan speed still remains the same unless the temperature hits the lower edge of Temp. Tolerance of Temp.3. (7) Once the monitored temperature hits the lower edge of Temp. Tolerance of Temp.3, the fan speed reduces directly from Fan Duty Cycle Level 3 to Fan Duty Cycle Level 2, and keeps the same speed until the temperature hits the next lower edge of Temp. Tolerance.
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W83L786NR/ W83L786NG
REGISTER D+, D- - FAN1 VTIN1 - FAN2
Non-Stop Duty Cycle Duty Level 1 Duty Level 2 Duty Level 3 Temp Point 1 Temp Point 2 Temp Point 3 Temp Point 4 Tolerance
CR[81h] b3:b0 CR[81h] b7:b4 CR[82h] b3:b0 CR[82h] b7:b4 CR[83h] b7:b0 CR[84h] b7:b0 CR[85h] b7:b0 CR[86h] b7:b0 CR[8Dh] b3:b0
CR[87h] b3:b0 CR[87h] b7:b4 CR[88h] b3:b0 CR[88h] b7:b4 CR[89h] b7:b0 CR[8Ah] b7:b0 CR[8Bh] b7:b0 CR[8Ch] b7:b0 CR[8Dh] b7:b4
7.6.5
Fan Fault (FAN_FAULT #)
W83L786NR/NG provides a good protection for fan speed. Set Pin 1 (FAN_FAULT#) to monitor fan speed. When FANIN1 (Pin8) or FANIN2 (Pin9) exceeds fan count high limit in VR3B or VR3C. Pin1 FAN_FAULT# will be asserted (Figure 13).
F a n c o u n t lim it
FA N _FA U LT#
F ig u re 1 3 . F A N _ F A U L T
7.7
7.7.1
Fault Signal--INT#
Temperature
Pin INT# for temperature has 3 modes. 7.7.1.1. Comparator Interrupt Mode Temperature exceeding TO causes an interrupt and this interrupt will be reset when reading all of the Interrupt Status Registers. Once an interrupt event has occurred by exceeding TO, then reset, if the temperature remains above the THYST, the interrupt will occur again when the next conversion has completed. If an interrupt event has occurred by exceeding TO and not reset, the interrupts will not occur again. The interrupts will continue to occur in this manner until the temperature goes below THYST. (Figure 14-1)
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7.7.1.2. Two-Times Interrupt Mode Temperature exceeding TO causes an interrupt and then temperature going below THYST will also cause an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. Once an interrupt event has occurred by exceeding TO, then reset, if the temperature remains above the THYST, the interrupt will not occur. (Figure 14-2) 7.7.1.3. One-Time Interrupt Mode Temperature exceeding TO causes an interrupt and then temperature going below THYST will not cause an interrupt. Once an interrupt event has occurred by exceeding TO, then going below THYST, an interrupt will not occur again until the temperature exceeding TO. (Figure 14-3)
T OI
T OI
T HYST
T HYST
SMI#
*
*
*
*
*
SMI#
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 14-1. Comparator Interrupt Mode
Figure 14-2. Two-Times Interrupt Mode
TO
I
TH
YST
S M I#
*
*
* In te rru p t R e s e t w h e n In te rru p t S ta tu s R e g is te rs a re re a d
F ig u re 1 4 -3 . O n e -T im e In te rru p t M o d e
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W83L786NR/ W83L786NG
7.7.2 Voltage
INT# interrupt for voltage is Two-Times Interrupt Mode. Voltage exceeding high limit or going below low limit will causes an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. (Figure 15-1)
7.7.3
Fan
INT# interrupt for fan is Two-Times Interrupt Mode. Fan count exceeding the limit, or exceeding and then going below the limit (set at value ram index 3Bh and 3Ch), will causes an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. (Figure 15-2)
Voltage High limit
Voltage Low limit
Fan Count limit
SMI#
*
*
*
*
SMI#
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 15-1. Voltage SMI# Mode
Figure 15-2. Fan SMI# Mode
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W83L786NR/ W83L786NG
8. CONTROL AND STATUS REGISTER
8.1
BIT
Configuration Register - Index 40h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0001b A one restores power on default value to all registers except the Serial Bus Address register. This bit is itself clear when it is set. Reserved Software Power Down. Set to 1 to power down this chip, but I2C interface is still working. Reserved Reserved A one disables the INT# outputs without affecting the contents of Interrupt Status Registers. The device will stop monitoring. It will resume upon clearing of this bit. A one enables startup of monitoring operations; a zero puts the part in standby mode. Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this location after an interrupt has occurred unlike "INT_Clear'' bit.
7 6-5 4 3 2 1
Software Reset Reserved SOFT_PWDN Reserved Reserved INT# Main Mask
Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write
0
START
Read/Write
8.2
BIT
INT# Status Register 1 - Index 41h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0000 b 7 6 Reserved TEMP1_STS Read Only Read Only Reserved A one indicates a High or Low limit has been exceeded from temperature sensor 1 (VTIN1). This bit is cleared when this register is read. A one indicates a High or Low limit has been exceeded from temperature sensor 0 (D+_D-). This bit is cleared when this register is read. Reserved A one indicates a High or Low limit has been exceeded. (VCC, +3.3V) This bit is cleared when this register is read. A one indicates a High or Low limit has been exceeded. (VRAM) This bit is cleared when this register is read. A one indicates a High or Low limit has been exceeded. (VCORE) This bit is cleared when this register is read.
5 4-3
TEMP0_STS Reserved
Read Only Read Only
2 1 0
VCC_STS VRAM_STS VCORE_STS
Read Only Read Only Read Only
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W83L786NR/ W83L786NG
8.3
BIT
INT# Status Register 2 - Index 42h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0000 b 7-2 1 Reserved FAN2_STS Read Only Read Only Reserved. A one indicates the fan count limit has been exceeded. This bit is cleared when this register is read. A one indicates the fan count limit has been exceeded. This bit is cleared when this register is read.
0
FAN1_STS
Read Only
8.4
BIT
INT# Mask Register 1 - Index 43h
NAME READ/WRITE DESCRIPTION
Power on default <7:0> = 1101, 1110 b 7 6 5 4-3 2 1 0 Reserved MSK_T1_INT MSK_T0_INT Reserved MSK_VCC_INT MSK_VRAM_INT MSK_VCORE_I NT Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Reserved A one disables the corresponding interrupt status bit for SMI# interrupt. (Temperature 1) A one disables the corresponding interrupt status bit for SMI# interrupt. (Temperature 0) Reserved A one disables the corresponding interrupt status bit for SMI# interrupt. (VCC, +3.3V) A one disables the corresponding interrupt status bit for SMI# interrupt. (VRAM) A one disables the corresponding interrupt status bit for SMI# interrupt. (VCORE)
8.5
BIT
INT# Mask Register 2 - Index 44h
NAME READ/WRITE DESCRIPTION
Power on default <7:0> = 1111, 1110 b 7-2 1 0 Reserved MSK_FAN2_INT MSK_FAN1_INT Read/Write Read/Write Read/Write Reserved. A one disables the corresponding interrupt status bit for SMI# interrupt. (Fan 2 speed counter) A one disables the corresponding interrupt status bit for SMI# interrupt. (Fan 1 speed counter)
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8.6
BIT
Register - Index 45h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0000 b 7-0 Reserved Read/write Reserved.
8.7
BIT
Register - Index 46h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0000 b 7-0 Reserved Read/write Reserved
8.8
BIT
GPIO/GPO Function Enable Control Register - Index 47h
NAME READ/WRITE DESCRIPTION
Power on default [7:0] = 0000, 0000 b Pin 2 Function Select. 7 EN_GPIO2 Read/Write <0> - Function of Pin 2 is TEMP_FAULT#. <1> - Function of Pin 2 is GPIO2. Pin 1 Function Select. 6 EN_GPIO1 Read/Write <0> - Function of Pin 1 is FAN_FAULT#. <1> - Function of Pin 1 is GPIO1. Pin 20 Function Select. 5 4-3 2 EN_GPIO7 Reserved EN_GPIO6 Read/Write Read/Write Read/Write <0> - Function of Pin 20 is VOLTAGE_FAULT#. <1> - Function of Pin 20 is GPIO7. Reserved Pin 18 Function Select. <0> - Function of Pin 18 is PWM/DC_OUT2. <1> - Function of Pin 18 is GPIO6. Pin 9 Function Select. 1 EN_GPIO5 Read/Write <0> - Function of Pin 9 is FANIN2. <1> - Function of Pin 9 is GPIO5. 0 EN_GPO3 &4 Enable GPO3 & GPO4 Function of Pin 6 & Pin7. Read/Write <0> - Functions of GPO3 & GPO4 are disabled. <1> - Functions of GPO3 & GPO4 are enabling.
8.9
Register - Index 48h
Reserved - 24 -
W83L786NR/ W83L786NG
8.10 GPIO1-2 & 5-7 I/O Mode Control Register - Index 49h
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7
Reserved
Read/write
Reserved. GPIO2 I/O Mode Select. (Only for GPIO function of Pin 2 is enabled.) <0> - GPIO2 is an input port. <1> - GPIO2 is an output port. GPIO1 I/O Mode Select. (Only for GPIO function of Pin 1 is enabled.) <0> - GPIO1 is an input port. <1> - GPIO1 is an output port. GPIO7 I/O Mode Select. (Only for GPIO function of Pin 20 is enabled.) <0> - GPIO7 is an input port. <1> - GPIO7 is an output port. Reserved GPIO6 I/O Mode Select. (Only for GPIO function of Pin 18 is enabled.) <0> - GPIO6 is an input port. <1> - GPIO6 is an output port. GPIO5 I/O Mode Select. (Only for GPIO function of Pin 9 is enabled.) <0> - GPIO5 is an input port. <1> - GPIO5 is an output port.
6
GPIO2_MODE
Read/Write
5
GPIO1_MODE
Read/Write
4
GPIO7_MODE
Read/Write
3-2
Reserved
Read/Write
1
GPIO6_MODE
Read/Write
0
GPIO5_MODE
Read/Write
8.11 GPO3-4 Output Data Register - Index 4Ah
Power on default [7:0] = 000P, PPPP b (P: power on trapping)
BIT NAME READ/WRITE DESCRIPTION
7 6 5 4-0
Reserved GPO4_VAL GPO3_VAL Reserved
Read/write Read/Write Read/Write Read/Write
Reserved. GPO4 Value. Set the output value of GPO4 pin. GPO3 Value. Set the output value of GPO3 pin. Reserved
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W83L786NR/ W83L786NG
8.12 GPIO1-2 & 5-7 Data Register - Index 4Bh
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7 6 5 4 3-2 1 0
Reserved GPIO2_VAL GPIO1_VAL GPIO7_VAL Reserved GPIO6_VAL GPIO5_VAL
Read/write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write
Reserved. GPIO2 Value. Set the output value of GPIO2 pin. Reading this bit will return the value of pin 2. GPIO1 Value. Set the output value of GPIO1 pin. Reading this bit will return the value of pin 1. GPIO7 Value. Set the output value of GPIO7 pin. Reading this bit will return the value of pin 20. Reserved GPIO6 Value. Set the output value of GPIO6 pin. Reading this bit will return the value of pin 18. GPIO5 Value. Set the output value of GPIO5 pin. Reading this bit will return the value of pin 9.
8.13 Winbond Vendor ID (Low Byte) - Index 4Ch
Power-on default [7:0] = 1010, 0011 b (0xA3h)
BIT NAME READ/WRITE DESCRIPTION
7:0
VIDL[7:0]
Read Only
Vendor ID Low Byte. Default A3h.
8.14 Winbond Vendor ID (High Byte) - Index 4Dh
Power-on default [7:0] = 0101, 1100 b (0x5Ch)
BIT NAME READ/WRITE DESCRIPTION
7:0
VIDH[7:0]
Read Only
Vendor ID High Byte. Default 5Ch
8.15 Chip ID - Index 4Eh
Power on default [7:0] = 1000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0
CHIPID[7:0]
Read Only
Winbond Chip ID number. Read this register will return 0x80h for W83L786NR/NG.
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8.16 Register - Index 4Fh
Reserved
8.17 Register - Index 50h
Reserved
8.18 GPIO1-2 & 5-7 Output Mode Control Register - Index 51h
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7 6
Reserved GPIO2_OB
Read/write Read/write
5
GPIO1_OB
Read/write
4 3-2 1
GPIO7_OB Reserved GPIO6_OB
Read/write Read/write Read/write
0
GPIO5_OB
Read/write
Reserved. Enable GPIO2 as Output Buffer. Set to <1> GPIO2 can drive logical high or logical low. <0> GPIO2 is open-drain. Enable GPIO1 as Output Buffer. Set to <1> GPIO1 can drive logical high or logical low. <0> GPIO1 is open-drain. Enable GPIO7 as Output Buffer. Set to <1> GPIO7 can drive logical high or logical low. <0> GPIO7 is open-drain. Reserved Enable GPI6 as Output Buffer. Set to <1> GPIO6 can drive logical high or logical low. <0> GPIO6 is open-drain. Enable GPIO5 as Output Buffer. Set to <1> GPIO5 can drive logical high or logical low. <0>GPIO5 is open-drain.
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W83L786NR/ W83L786NG
8.19 INT# Property Select - Index 52h
Power on - <7:0> --0000, 0100 b
BIT NAME READ/WRITE DESCRIPTION
7-4
Reserved
Read/Write
3-2
TEMP_INT_MD [1:0]
Read/Write
1 0
EN_INT# Reserved
Read/Write Read/Write
Reserved. Temperature INT Mode Select. <00> - Comparator Interrupt Mode: Temperature 1/2 exceeds TO (Overtemperature) limit causes an interrupt. Reading the Interrupt Status will reset this interrupt. <01> - Two Time Interrupt Mode:(Default) This bit use in temperature sensor 1/2 interrupt mode with hysteresis and TO type. Temperature exceeding TO, causes an interrupt and then temperature going below THYST will also cause another interrupt if the previous interrupt has been reset by reading the interrupt Status Register. Once an interrupt event has occurred by exceeding TO, then reset, if the temperature remains above the THYST. <10> - One Time Interrupt Mode: This bit use in temperature sensor 1/2 interrupt mode with hysteresis type. Temperature exceeding TO (Over-temperature) causes an interrupt and then temperature going below THYST (Hysteresis temperature) will not cause an interrupt. Once an interrupt event has occurred by exceeding TO, then going below THYST, and interrupt will not occur again until the temperature exceeding TO. Enable INT# Output. A one enables the INT# Interrupt output. Reserved.
8.20 Thermal Sensor 1/2 Type Register - Index 53h
Power on default [7:0] = 0100, 0001 b
BIT NAME READ/WRITE DESCRIPTION
7-2 1
Reserved T1_TYPE
Read/Write Read/Write
0
T0_TYPE
Read/Write
Reserved. Temperature sensor 1 type. <0> - Thermistor (10K @ 25 degree C, B=3435). <1> - thermal diode. Temperature sensor 0 (GPU) type. <0> - Thermistor (10K @ 25 degree C, B=3435) <1> - thermal diode.
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W83L786NR/ W83L786NG
8.21 Fan Divisor Register - Index 54h
Power on default [7:0] = 0001, 0001 b
BIT NAME READ/WRITE DESCRIPTION
7
Reserved
Read/write
Reserved. FAN2 Divisor Select. <000> - divide by 1; <001> - divide by 2; <010> - divide by 4;
6-4
FAN2_DIV_SEL[2:0]
Read/Write
<011> - divide by 8. <100> - divide by 16. <101> - divide by 32. <110> - divide by 64. <111> - divide by 128.
3
Reserved
Read/write
Reserved. FAN1 Divisor Select. <000> - divide by 1; <001> - divide by 2; <010> - divide by 4;
2-0
FAN1_DIV_SEL[2:0]
Read/Write
<011> - divide by 8. <100> - divide by 16. <101> - divide by 32. <110> - divide by 64. <111> - divide by 128.
8.22 Reserved - Index 55h ~ 5Fh
Reserved
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W83L786NR/ W83L786NG
8.23 FAN Configuration Register - Index 80h
Power on default [7:0] = 0011, 1100 b
BIT NAME READ/WRITE DESCRIPTION
FAN2 Control Mode 7 EN_PWM2 Read/Write <1> - PWM FAN Control Mode <0> - DC FAN Control Mode FAN1 Control Mode 6 EN_PWM1 Read/Write <1> - PWM FAN Control Mode <0> - DC FAN Control Mode FAN2 Control Mode. <00> - Manual Control Mode. (Default) 5-4 FAN2_MODE Read/Write <01> - Thermal Cruise mode. <10> - SMART FANTM II Mode. <11> - FAN_SET. FAN 1 Control Mode. <00> - Manual Control Mode. (Default) 3-2 FAN1_MODE Read/Write <01> - Thermal Cruise mode. <10> - SMART FANTM II Mode. <11> - FAN_SET. 1-0 Reserved Read/Write Reserved.
8.24 DC FAN1 Output Voltage Level Control Register (Manual Mode) / FAN1 Output Voltage Table (SMART FANTM II Mode) - Index 81h
Power on default [7:0] 1111, 1111 b For Manual Mode
BIT NAME READ/WRITE DESCRIPTION
7-4
Reserved
Read/Write
Reserved. DC FAN1 Output Level. Only for Thermal Manual Mode while CR80h bit3-2 is 00. This 3-bit register determines the DC FAN driving voltage.
3-0
FAN1_DC [3:0]
Read/Write
<0x0h> - DC output is 0V. <0xFh> - DC output is 3.3V. <0xXh> - DC output levels are from 0V to 3.3v and they are separated into 16 levels equally.
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W83L786NR/ W83L786NG
For SMART FANTM II Mode
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
FAN1_TAB2[3:0] FAN1_TAB1[3:0]
Read/Write Read/Write
FAN1 Output Level 2 for SMART FANTM II Mode. FAN1 Output Level 1 for SMART FANTM II Mode.
8.25 FAN1 Output Voltage Table (SMART FANTM II Mode) - Index 82h
Power on default [7:0] 1111, 1111 b
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
FAN1_TAB4[3:0] FAN1_TAB3[3:0]
Read/Write Read/Write
FAN1 Output Level 4 for SMART FANTM II Mode. FAN1 Output Level 3 for SMART FANTM II Mode.
8.26 TEMP0 (D+_D-) Target Temperature Register (Thermal Cruise Mode) / TEMP_POINT1 for FAN1 (SMART FANTM II Mode) - Index 83h
Power on default [7:0] = 0000, 0000 b TEMP1 target temperature register for Thermal Cruise mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_TAR_T0[7:0]
Read/Write
TEMP0 Target Temperature. Only for Thermal Cruise Mode while CR84h bit3-2 is 01.
TEMP_POINT1 register for Smart FAN II Mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P1F1[7:0]
Read/Write
TEMP_POINT1 for FAN1 use Smart FAN II Mode.
8.27 TEMP_POINT2 for FAN1 (SMART FANTM II Mode) - Index 84h
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P2F1[7:0]
Read/Write
TEMP_POINT2 for FAN1 use SMART FANTM II Mode.
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W83L786NR/ W83L786NG
8.28 FAN 1 Speed Low Limit Rate Control Register (Thermal Cruise Mode) / TEMP_POINT3 for FAN1 (SMART FANTM II Mode) - Index 85h
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
Reserved FAN1_LL [3:0]
Read/Write Read/Write
Reserved. Low Limit Speed of FAN1. Only for Thermal Cruise mode.
TEMP_POINT3 register for Smart FAN II Mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P3F1[7:0]
Read/Write
TEMP_POINT3 for FAN1 use SMART FANTM II Mode.
8.29 TEMP_POINT4 for FAN1 (SMART FANTM II Mode) - Index 86h
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P4F1[7:0]
Read/Write
TEMP_POINT4 for FAN1 use SMART FANTM II Mode.
8.30 DC FAN2 Output Voltage Level Control Register (Manual Mode)/ FAN2 Output Voltage Table (SMART FANTM II Mode) - 87h
Power on default [7:0] 1111, 1111 b For Manual Mode
BIT NAME READ/WRITE DESCRIPTION
7-4
Reserved
Read/Write
Reserved. DC FAN2 Output Level. Only for Thermal Manual Mode while CR80h bit5-4 is 00. This 3-bit register determines the DC FAN driving voltage.
3-0
FAN2_DC [3:0]
Read/Write
<0x0h> - DC output is 0V. <0xFh> - DC output is 3.3V. <0xXh> - DC output levels are from 0V to 3.3v and they are separated into 16 levels equally.
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W83L786NR/ W83L786NG
For SMART FANTM II Mode
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
FAN2_TAB2[3:0] FAN2_TAB1[3:0]
Read/Write Read/Write
FAN2 Output Level 2 for SMART FANTM II Mode. FAN2 Output Level 1 for SMART FANTM II Mode.
8.31 FAN2 Output Voltage Table (SMART FANTM II Mode) - Index 88h
Power on default [7:0] 1111, 1111 b
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
FAN2_TAB4[3:0] FAN2_TAB3[3:0]
Read/Write Read/Write
FAN2 Output Level 4 for SMART FANTM II Mode. FAN2 Output Level 3 for SMART FANTM II Mode.
8.32 TEMP1 (VTIN1) Target Temperature Register (Thermal Cruise Mode) / TEMP_POINT1 for FAN2 (SMART FANTM II Mode) - Index 89h
Power on - [7:0] = 0000, 0000 b TEMP2 target temperature register for Thermal Cruise mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_TAR_T1[7:0]
Read/Write
TEMP1 Target Temperature. Only for Thermal Cruise Mode while CR84h bit5-4 is 01.
TEMP_POINT1 register for SMART FANTM II Mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P1F2[7:0]
Read/Write
TEMP_POINT1 for FAN2 use SMART FANTM II Mode.
8.33 TEMP_POINT2 for FAN2 (SMART FANTM II Mode) - Index 8Ah
Power on - [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P2F2[7:0]
Read/Write
TEMP_POINT2 for FAN2 use SMART FANTM II Mode.
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8.34 FAN 2 Speed Low Limit Rate Control Register/ TEMP_POINT3 for FAN2 SMART FANTM II Mode) - Index 8Bh
Power on default [7:0] =0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-5 4-1
Reserved FAN2_LL [3:0]
Read/Write Read/Write
Reserved. Low Limit Speed of FAN2. Only for Thermal Cruise mode.
TEMP_POINT3 register for SMART FANTM II Mode.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P3F2[7:0]
Read/Write
TEMP_POINT3 for FAN2 use SMART FANTM II Mode.
8.35 TEMP_POINT4 for FAN2 (SMART FANTM II Mode) - Index 8Ch
Power on default [7:0] = 0000, 0000 b.
BIT NAME READ/WRITE DESCRIPTION
7-0
TEMP_P4F2[7:0]
Read/Write
TEMP_POINT4 for FAN2 use SMART FANTM II Mode.
8.36 Tolerance of Temperature Register - Index 8Dh
Power on default [7:0] = 0011, 0011 b For Thermal Cruise mode
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
TOL_T1[3:0] TOL_T0[3:0]
Read/Write Read/Write
Tolerance of Fan 2 Target Temperatures (Temp1). Only for Thermal Cruise mode. Tolerance of Fan 1 Target Temperature (Temp0). Only for Thermal Cruise mode.
For Smart FAN II Mode
BIT NAME READ/WRITE DESCRIPTION
7-4 3-0
TOL_T1[3:0] TOL_T0[3:0]
Read/Write Read/Write
Tolerance of Fan 2 Temperatures (Temp1). Only for SMART FANTM II Mode. Tolerance of Fan 1 Temperature (Temp0). Only for SMART FANTM II Mode.
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W83L786NR/ W83L786NG
8.37 FAN 2D/3D state Control Register - Index 8Eh
At SMART FANTM II Mode, FAN will be controlled by 2D/3D mode after writing 2Dh/3Dh to CR8A
8.38 FAN Pre-Scale Register - Index 8Fh
Power on default [7:0] = 0010, 0010 b
BIT NAME READ/WRITE DESCRIPTION
7
PWM2_CLK_SEL
Read/Write
PWM Input Clock Select of Fan 2. This bit select FAN input clock to pre-scale divider. <0> - 1.44MHz <1> - 180KHz FAN 2 PWM Input Clock divider. <000> - divider is 1 <001> - divider is 2 <010> - divider is 4
6-4
PWM2_CLK_DIV [2:0]
Read/Write
<011> - divider is 8 <100> - divider is 16 <101> - divider is 32 <110> - divider is 64 <111> - divider is 128 PWM Input Clock Select of Fan 1. This bit select FAN input clock to pre-scale divider. <0h> - 1.44MHz <1h> - 180KHz FAN 1 PWM Input Clock divider. <000> - divider is 1 <001> - divider is 2 <010> - divider is 4
3
PWM1_CLK_SEL
Read/Write
2-0
PWM1_CLK_DIV [2:0]
Read/Write
<011> - divider is 8 <100> - divider is 16 <101> - divider is 32 <110> - divider is 64 <111> - divider is 128
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
8.39 FAN Initial Output Value - Index90h
Power on trapping
BIT NAME READ/WRITE DESCRIPTION
7 6-4
FAN_3DST Reserved
Read Read/Write
A one indicates FAN is working at 3D mode (for SMART FANTM II Mode). It can be programmed directly by I2C. Reserved. FAN Initial Speed.
VDD Ra FAN_SET Rb
3-0
FANINI [3:0]
Read/Write
Use two resistors to divide a four section to represent different initial FAN Speed. The table is shown as following. Section 3 2 1 0 FAN Speed rate 100 81 62 43 Ra 9.1K 4.7K 9.1K x Rb x 9.1K 4.7K 9.1K
8.40 Fan Step down Time Register - Index 91h
Power on default [7:0] = 0001, 0100 b
BIT NAME READ/WRITE DESCRIPTION
7-0
STEP_DOWN_T[7:0]
Read/Write
The time interval, which is 1-second unit, to decrease DC output level in SMART FANTM II Control mode.
8.41 Fan Step up Time Register - Index 92h
Power on default [7:0] = 0000, 1010 b
BIT NAME READ/WRITE DESCRIPTION
7-0
STEP_UP_T[7:0]
Read/Write
The time interval, which is 1-second unit, to increase DC output level in SMART FANTM II Control mode.
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W83L786NR/ W83L786NG
8.42 Temperature Sensor 0 (D+_D-) Offset Register - Index 93h
Power-on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
Temperature 0 base temperature. The real temperature is sum of both monitor value and offset value. 0111,1111 => +127/4 degree C 0111,1110 => +126/4 degree C : 7-0 OFFSET0[7:0] Read/Write 0000,0001 => +1/4 degree C 0000,0000 => +0 degree C 1111,1111 => -1/4 degree C 1111,1110 => -2/4 degree C : 1000,0000 => -128/4 degree
8.43 Temperature Sensor 1 (VTIN1) Offset Register - Index 94h
Power-on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
Temperature 1 base temperatures. The real temperature is sum of both monitor value and offset value. 0111,1111 => +127/4 degree C 0111,1110 => +126/4 degree C : 7-0 OFFSET1[7:0] Read/Write 0000,0001 => +1/4 degree C 0000,0000 => +0 degree C 1111,1111 => -1/4 degree C 1111,1110 => -2/4 degree C : 1000,0000 => -128/4 degree
8.44 Register - Index 95h
Power-on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0
Reserved
Read/Write
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
8.45 Register - Index 96h
Power-on default [7:0] = 0001, 1001 b
BIT NAME READ/WRITE DESCRIPTION
7-0
Reserved
Read/Write
8.46 Register - Index 97h
Power-on default [7:0] = 0001, 1001 b
BIT NAME READ/WRITE DESCRIPTION
7-0
Reserved
Read/Write
Value RAM and Limit Value
8.47 Value RAM - Index 20h- 3Fh or 60h - 7Fh
INDEX A7-A0 DESCRIPTION UNIT
20h 21h 22h 23h 24h 25h 26h 27h 28h
VCORE reading VRAM reading VCC reading Reserved Reserved Temperature 0 reading (D+_D-, 0 ~ 255) Temperature 1 reading (VTIN1, 0 ~ 255) Reserved FANIN1 reading Note: This location stores the number of counts of the internal clock per revolution. FANIN2 reading Note: This location stores the number of counts of the internal clock per revolution. Reserved VCORE High Limit. (0xff) VCORE Low Limit. (0x00) VRAM High Limit. (0xff) VRAM Low Limit. (0x00) VCC High Limit. (0xff) Count C C
29h 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh
Count
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W83L786NR/ W83L786NG
Value RAM - Index 20h- 3Fh or 60h - 7Fh, continued.
INDEX A7-A0
DESCRIPTION
UNIT
30h 31h 32h 33h 34h 35h 36h 37h 38h 39h 3Ah 3Bh
VCC Low Limit. (0x00) Reserved Reserved Reserved Reserved Over Temperature 0 Limit (High). (0x50) Temperature 0 Hysteresis Limit (Low). (0x4b) Over Temperature 1 Limit (High). (0x50) Temperature 1 Hysteresis Limit (Low). (0x4b) Reserved Reserved FAN1 Fan Count Limit. (0xff) Note: It is the number of counts of the internal clock for the Low Limit of the fan speed. FAN2 Fan Count Limit. (0xff) Note: It is the number of counts of the internal clock for the Low Limit of the fan speed. FAN1 Speed Control Output Level FAN2 Speed Control Output Level Reserved Count C C C C C C
3Ch 3Dh 3Eh 3Fh
Count
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
9. ELECTRICAL CHARACTERISTICS
9.1 Absolute Maximum Ratings
PARAMETER RATING UNIT
Power Supply Voltage Input Voltage Operating Temperature Storage Temperature
-0.5 to 7.0 -0.5 to VCC+0.5 0 to +70 -55 to +150
V V C C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
9.2
DC Characteristics
PARAMETER SYM. MIN. TYP. MAX. UNIT CONDITIONS
(Ta = 0 C to 70 C, VDD = 5V 10%, VSS = 0V) I/O12t - TTL level bi-directional pin with source-sink capability of 12 mA Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage VIL VIH VOL VOH ILIH ILIL 2.4 +10 -10 2.0 0.4 0.8 V V V V A A IOL = 12 mA IOH = - 12 mA VIN = VDD VIN = 0V
I/O12ts - TTL level bi-directional pin with source-sink capability of 12 mA and schmitt-trigger level input Input Low Threshold Voltage Input High Threshold Voltage Hysteresis Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage VtVt+ VTH VOL VOH ILIH ILIL 2.4 +10 -10 0.5 1.6 0.5 0.8 2.0 1.2 0.4 1.1 2.4 V V V V V A A VDD = 5 V VDD = 5 V VDD = 5 V IOL = 12 mA IOH = - 12 mA VIN = VDD VIN = 0V
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W83L786NR/ W83L786NG
DC Characteristics, continued
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
OUT12t - TTL level output pin with source-sink capability of 12 mA Output Low Voltage Output High Voltage VOL VOH 2.4 0.4 V V IOL = 12 mA IOH = -12 mA
OD8 - Open-drain output pin with sink capability of 8 mA Output Low Voltage VOL 0.4 V IOL = 8 mA
OD12 - Open-drain output pin with sink capability of 12 mA Output Low Voltage VOL 0.4 V IOL = 12 mA
OD48 - Open-drain output pin with sink capability of 48 mA Output Low Voltage VOL 0.4 V IOL = 48 mA
INt - TTL level input pin Input Low Voltage Input High Voltage Input High Leakage Input Low Leakage INts VIL VIH ILIH ILIL 2.0 +10 -10 0.8 V V A A VIN = VDD VIN = 0 V
- TTL level Schmitt-triggered input pin VtVt+ VTH ILIH ILIL 0.5 1.6 0.5 0.8 2.0 1.2 +10 -10 1.1 2.4 V V V A A VDD = 5 V VDD = 5 V VDD = 5 V VIN = VDD VIN = 0 V
Input Low Threshold Voltage Input High Threshold Voltage Hysteresis Input High Leakage Input Low Leakage
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
9.3
9.3.1
AC Characteristics
Serial Bus Timing Diagram
t SCL tR R
t
SCL
t HD;SDA
t SU;DAT t SU;STO
SDA IN
VALID DATA
t HD;DAT
SDA OUT Serial Bus Timing Diagram
Serial Bus Timing
PARAMETER SYMBOL MIN. MAX. UNIT
SCL clock period Start condition hold time Stop condition setup-up time DATA to SCL setup time DATA to SCL hold time SCL and SDA rise time SCL and SDA fall time
t SCL tHD;SDA tSU;STO tSU;DAT tHD;DAT tR tF
-
10 4.7 4.7 120 5 1.0 300
uS uS uS nS nS uS nS
9.3.2
VID Input Skew
t hold t skew
VIDA[5:0]/VIDB[5:0]
VALID VID
VALID VID
VID Input Timing
PARAMETER SYMBOL MIN. MAX. UNIT
VID Input Unstable Time VID Valid Input Hold Time
t-Skew t-hold 4
0.8
uS uS
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W83L786NR/ W83L786NG
10. THE TOP MARKING
The top marking of W83L786NR
W83L786NR 2826978Y-61 443OB
Left: Winbond logo 1st line: part number: W83L786NR 2nd line: Tracking code 2 826978Y-61 3rd line: Tracking code 443 O B 443: packages made in '04, week 43 O: assembly house ID; A means ASE, S means SPIL, O means OSE B: IC revision The top marking of W83L786NG
W83L786NG 2826978Y-61 443OB
Left: Winbond logo 1st line: part number: W83L786NG, G means Pb-free package 2nd line: Tracking code 2 826978Y-61 3rd line: Tracking code 443 O B 443: packages made in '04, week 43 O: assembly house ID; A means ASE, S means SPIL, O means OSE B: IC revision
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Publication Release Date: March 31, 2006 Revision 0.9
W83L786NR/ W83L786NG
11. PACKAGE SPECIFICATION
20L SSOP-209 mil
D 20 11
DTEAIL A
HE E
1
10
A2 A
SEATING PLANE
b
SEATING PLANE
Y
e
b
L L1
A1
DETAIL A
SYMBOL
DIMENSION IN MM DIMENSION IN INCH MIN. NOM MAX. MIN. NOM MAX.
A A1 A2 b c D E HE e L L1 Y
2.00 0.05 1.65 1.75 0.22 0.09 6.90 7.20 5.00 5.30 7.40 7.80 0.65 0.55 0.75 1.25 0 1.85 0.38 0.25 7.50 5.60 8.20 0.95 0.10 8 0.002 0.065 0.009 0.004 0.272 0.197 0.291
0.079 0.069 0.073 0.015 0.010 0.283 0.295 0.209 0.220 0.307 0.323
0.0256
0.021 0.030 0.037 0.050 0.004 0 8
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W83L786NR/ W83L786NG
Please note that all data and specifications are subject to change without notice. All the trademarks of products and companies mentioned in this data sheet belong to their respective owner.
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
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Publication Release Date: March 31, 2006 Revision 0.9

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