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W83L785R Winbond H/W Monitoring IC
W83L785R
WINBOND H/W MONITORING IC FOR NOTEBOOK
W83L785R Data Sheet Revision History
Pages 1 2 3 n.a. n.a. n.a 01/ Aug. 02/Apr 0.6 1.0 Dates Version Version on Web n.a. n.a. 1.0 All the version before 0.50 are for internal use. First publication. Change version and version on web site to 1.0 Main Contents
Please note that all data and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this data sheet belong to their respective owners. 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.
W83L785R
1. 2. 2.1 2.2 2.3 2.4 3. 4. 5. 6.
GENERAL DESCRIPTION.........................................................................................................................5 FEATURES....................................................................................................................................................6 MONITORING ITEMS .....................................................................................................................................6 ACTIONS ENABLING .....................................................................................................................................6 GENERAL......................................................................................................................................................6 PACKAGE......................................................................................................................................................6 KEY SPECIFICATIONS..............................................................................................................................7 PIN CONFIGURATION ..............................................................................................................................7 PIN DESCRIPTION......................................................................................................................................9 FUNCTIONAL DESCRIPTION................................................................................................................11
6.1 GENERAL DESCRIPTION..............................................................................................................................11 6.2 ACCESS INTERFACE ....................................................................................................................................11 6.2.1 The first serial bus access timing are shown as follow: ....................................................................11 6.3 MONITORING TIME .....................................................................................................................................12 6.4 ANALOG INPUTS .........................................................................................................................................13 6.4.1 Voltage Monitor input can not be over 2.048V : ...............................................................................13 6.5 TEMPERATURE MEASUREMENT MACHINE..................................................................................................14 6.5.1 Monitor temperature from thermistor: ..............................................................................................14 6.5.2 Monitor temperature from Pentium IITM thermal diode ....................................................................14 6.5.3 Over Temperature signal (OVT#)......................................................................................................15 6.5.4 Temperature Fault (Temp_fault #) ....................................................................................................16 6.6 FAN SPEED COUNT AND FAN SPEED CONTROL ........................................................................................17 6.6.1 Fan speed count.................................................................................................................................17 6.6.2 Fan speed control ..............................................................................................................................18 6.7 SMI# ..........................................................................................................................................................19 6.7.1 Temperature.......................................................................................................................................19 6.7.2 Voltage...............................................................................................................................................20 6.7.3 Fan.....................................................................................................................................................20 7. 7.1 7.2 7.3 7.4 7.5 7.6 7.7 CONTENT OF DATA REGISTERS.........................................................................................................22
CONFIGURATION REGISTER INDEX 40H .................................................................................................22 SMI# STATUS REGISTER 1 INDEX 41H ...................................................................................................22 RESERVED INDEX 42H ...........................................................................................................................23 SMI# MASK REGISTER 1 INDEX 43H .....................................................................................................23 RESERVED INDEX 44H ...........................................................................................................................23 REAL TIME HARDWARE STATUS REGISTER I -INDEX 45H ....................................................................................................... RESERVED -- INDEX 46H.............................................................................................................................24
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7.8 FAN DIVISOR REGISTER INDEX 47H .......................................................................................................24 7.9 FANIN1/GPO1, FANIN2/GPO2, SMI#/GPO7, AND OVT#/GPIO8 CONTROL REGISTER- INDEX 48H....25 7.10 TEMP_FAULT#/GPIO11, +2.5V/GPO14, +1.5V/GPO15, AND VCORE/GPO16 CONTROL REGISTERINDEX 49H..............................................................................................................................................................26 7.11 GPIO1/2, GPIO7/8, AND GPIO11/14/15/16 OUTPUT CONTROL REGISTER- INDEX 4AH...........................27 7.12 GPIO5, GPIO6, AND GPIO13 CONTROL REGISTER -- INDEX 4BH ............................................................28 7.13 WINBOND VENDOR ID (LOW BYTE) - INDEX 4CH .....................................................................................29 7.14 WINBOND VENDOR ID (HIGH BYTE) - INDEX 4DH ....................................................................................29 7.15 CHIP ID -- INDEX 4EH ................................................................................................................................29 7.16 RESERVED -- INDEX 4FH ............................................................................................................................29 7.17 OVT# PROPERTY SELECT - INDEX 50H ......................................................................................................29 7.18 SMI# PROPERTY SELECT -- INDEX 51H ......................................................................................................30 7.19 THERMAL SENSOR 1/2 TYPE REGISTER -- INDEX 52H.................................................................................31 7.20 TEMPERATURE SENSOR 1 FAULT LIMIT -- INDEX 53H ................................................................................32 7.21 TEMPERATURE SENSOR 2 FAULT LIMIT -- INDEX 54H ................................................................................32 7.22 RESERVED -- INDEX 55H ~ 7FH ..................................................................................................................32 7.23 PWM 1 PRE-SCALE REGISTER-- INDEX 80H ..............................................................................................32 7.24 PWM 1 DUTY CYCLE SELECT REGISTER-- 81H .........................................................................................33 7.25 PWM 2 PRE-SCALE REGISTER-- INDEX 82H ..............................................................................................33 7.26 PWM2 DUTY CYCLE SELECT REGISTER-- INDEX 83H ...............................................................................34 7.27 RESERVED REGISTER-- INDEX 84H .............................................................................................................34 7.28 TEMPERATURE SENSOR 1 (FOR ENVIRONMENT) OFFSET REGISTER - INDEX 85H .......................................34 7.29 TEMPERATURE SENSOR 2 (FOR CPU) OFFSET REGISTER - INDEX 86H .......................................................35 8. 8.1 9. 9.1 9.2 9.3 10. 11. 12. VALUE RAM AND LIMIT VALUE.........................................................................................................36 VALUE RAM INDEX 20H- 3FH OR 60H - 7FH ........................................................................................36 SPECIFICATIONS .....................................................................................................................................38 ABSOLUTE MAXIMUM RATINGS .................................................................................................................38 DC CHARACTERISTICS ...............................................................................................................................38 AC CHARACTERISTICS ...............................................................................................................................41 HOW TO READ THE TOP MARKING ..............................................................................................42 PACKAGE DRAWING AND DIMENSIONS......................................................................................43 W83L785R SCHEMATICS....................................................................................................................44
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1. GENERAL DESCRIPTION
W83L785R is a condensed product of W83L784R --- Winbond's most popular hardware monitoring IC for notebook. Specifically designed for the graphic cards and notebook systems, W83L785R 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. An 8-bit analog-to-digital converter (ADC) was built inside W83L785R. The W83L785R can monitor 4 analog voltage inputs, 2 fan tachometer inputs, 2 remote temperature sensors. The remote temperature sensing can be performed by thermistors, or connected from IntelTM Deschutes CPU thermal diode output. The W83L785R provides 2 PWM (pulse width modulation) outputs for the fan speed control. Also the W83L785R provides: SMI#, OVT#, Temp fault, GPIO signals for system protection events; I2CTM serial bus interface. W83L785R also provides 4 pure GPIO and 7 multifunctional GPIO pins, and powered by 3.3V. Through the application software or BIOS, the users can read all the monitored parameters of system from time to time. And a pop-up warning can be also activated when the monitored item was out of the proper/preset range. The application software could be Winbond's Hardware DoctorTM, or 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 to activate one programmable and maskable interrupts. For the spacing saving consideration of the Notebook system, W83L785R is in the package of 209mil 20pins-SSOP.
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2. FEATURES
2.1 Monitoring Items
* 2 thermal inputs from remote thermistors or PentiumTM II (Deschutes) thermal diode output * 4 voltage inputs --- typical for Vcore, +3.3V (Power), +2.5V, +1.5V * 2 sets of PWM fan speed control * WATCHDOG comparison of all monitored values * Programmable hysteresis and setting points (alarm thresholds) for all monitored items
2.2 Actions Enabling
* 2 PWM (pulse width modulation) outputs for fan speed control --- Total up to 2 sets of fan speed monitoring and controlling * Issue temperature fault signal as the temperature of the system/CPU exceeds its limit. * Issue SMI#, OVT#, GPIO and Temp. Fault signals to activate system protection * Warning signal pop-up in application software
2.3 General
* I2CTM serial bus interface * IntelTM LDCM (DMI driver 2.0) support * Winbond hardware monitoring application software (Hardware DoctorTM ) support, for both Windows 95/98 and Windows NT 4.0/5.0 * Meet WfM 2.0 (Wired for Management) spec. * 3.3V VCC operation
2.4 Package
* 20-pin SSOP (209mil)
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3. KEY SPECIFICATIONS
* Voltage monitoring accuracy * Monitoring Temperature Range and Accuracy - 40C to +120C * Supply Voltage * Operating Supply Current * Power Down Supply Current * ADC Resolution 3C(Max) 2.7V ~ 5.5V 2 mA typ. 10 uA typ. 8 Bits 1% (Max)
4. PIN CONFIGURATION
FANIN1/GPIO1 FANIN2/GPIO2 PWMOUT1 PWMOUT2 GPIO5 GPIO6 SMI#/GPIO7 OVT#/GPIO8 SCL SDA 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC CPUT1/PII1 CPUT2/PII2 VREF VCORE/GPIO16 +1.5V/GPIO15 +2.5VIN/GPIO14 GPIO13 GND TEMP_FAULT/GPIO11
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5. PIN DESCRIPTION
I/O12t I/O12ts OUT12 AOUT OD12 INt INts AIN - TTL level bi-directional pin with 12 mA source-sink capability,open drain output - TTL level and schmitt trigger - Output pin with 12 mA source-sink capability - Output pin(Analog) - Open-drain output pin with 12 mA sink capability - TTL level input pin - TTL level input pin and schmitt trigger - Input pin(Analog)
PIN NAME FANIN1 / GPIO1 FANIN2 / GPIO2 PWMOUT1 PWMOUT2 GPIO5 GPIO6 SMI#/ GPIO7 OVT#/ GPIO8 SCL SDA TEMP_FAULT GPIO11
PIN NO. 1
TYPE IN t s / I/OD12ts IN t s / OUT1 2 OD12 OD12 I/OD12ts I/OD12ts OD12 I/OD12ts OD12 I/OD12ts INt s I/OD12 OD1 2 I/OD12ts
2
3 4 5 6 7
DESCRIPTION 0V to +3.3V amplitude fan tachometer input.(Default) / General purpose I/O function. This multi-functional pin is programmable. 0V to +3.3V amplitude fan tachometer input. (Default) / General purpose I/O function. This multi-functional pin is programmable. Fan speed control PWM output. This pin is open-drain Fan speed control PWM output. This pin is open-drain General purpose I/O function. General purpose I/O function. System Management Interrupt. General purpose I/O function. This multi-functional pin is programmable. Over temperature Shutdown Output. General purpose I/O function. This multi-functional pin is programmable. Serial Bus Clock. Serial Bus bi-directional Data. Active-Low output. This pin will be a logic LOW when the temperature of the system or CPU exceeds its limit. (Default) / General purpose I/O function. This multi-functional pin is programmable. Ground.
8
9 10 11
GND
12
Ground
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Pin Discription, continued
PIN NAME GPIO13 +2.5V/ GPIO14
PIN NO. 13 14
TYPE I/OD12ts AIN I/OD12ts
DESCRIPTION General purpose I/O function. Default Open drain. 0V to 2.048V FSR Analog Inputs. (This pin is connected to the +2.5V). General purpose I/O function. This multi-functional pin is programmable. 0V to 2.048V FSR Analog Inputs. (This pin is connected to the +1.5V). General purpose I/O function. This multi-functional pin is programmable. 0V to 2.048V FSR Analog Inputs. (This pin connected to VCORE) General purpose I/O function. This multi-functional pin is programmable. Reference Voltage. Thermistor terminal input.(Default) / PentiumTM II diode input. This multi-functional pin is programmable.
+1.5V/ GPIO15 VCORE/ GPIO16
15
AIN I/OD12ts
16
AIN I/OD12ts
VREF CPUT2 / PII2 CPUT1 / PII1 VCC
17 18
AOUT AIN
19
AIN
Thermistor terminal input.(Default) / PentiumTM II diode input. This multi-functional pin is programmable.
20
POWER
+3.3 VCC power supply input.
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6. FUNCTIONAL DESCRIPTION
6.1 General Description
The W83L785R provides most 4 analog positive inputs, 2 fan speed monitors, 2 sets for fan PWM (Pulse Width Modulation) control, 2 remote thermal inputs from remote thermistors or 2N3904 transistors or PentiumTM II (Deschutes) thermal diode outputs. W83L785R also provides software power down this chip to save power, but I2C interface is still working. When W83L785 starts the monitor function on the chip, the Watch Dog machine monitor every function and store the value to registers. If the monitor value exceeds the limit value, the interrupt status will be set to 1.
6.2 Access Interface
The W83L785R provides I2C Serial Bus to read/write internal registers. In the W83L785R, the I2C address defined value is 0101101.
6.2.1 The first serial bus access timing are shown as follow: (a) Serial bus write to internal address register followed by the data byte
0 SCL SDA
Start By Master
7
8
0
7
8
0
1
0
1
1
0
1
R/W
Ack by 785R
D7
D6
D5
D4
D3
D2
D1
D0
Ack by 785R
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 by 784R 785R 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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(b) Serial bus read form internal address register followed by the data byte
SCL SDA Start By Master 0 7 8 0 7 8
0
1
0
1
1
0
1
R/W ack by 785R
D7
D6
D5
D4
D3
D2
D1
D0 ack by 785R
Frame 1 Serial Bus Address Byte 0 1 2 3 4 5
Frame 2 Internal Index Register Byte 7 8 0 1 2 3 4 5
6
6
7
8
SCL(Continued) SDA(Continued) 0 1 0 1 1 0 1 D7 ack by 785R D6 D5 D4 D3 D2 by Frame 4 Data Byte D1 D0 784R Ack Stop by ack by Master 785R
R/W
Frame 3 Serial Bus Byte
Figure 2. Serial Bus read from Internal Address Register followed by the Data Byte
6.3 Monitoring Time
The W83L785R's monitoring time include temperature's conversion time, voltage's conversion time, and fan's count time. The W83L785R sample rate is 22.5KHz. The temperature's conversion time need 24 cycles (worst case). The voltage's ADC conversion time need 16 cycles (worst case). The fan conversion cycle is divisor * count cycles. The W83L785R has 4 sets voltage, 2 sets temperature, 2 sets fans. 2 sets temperature monitor time : 2 * 24*0.044mS= 2.112 mS 4 sets voltage : 4 * 16 * 0.044 = 2.816 mS
EX : fan=4000RPM Divisor =2 , count=169 Fan transform time=0.044*2*169=14.872mS 2 Fan transform time= 14.872 mS * 2 = 29.744 mS Total monitor time = 2.8+2.1+29.7= 34.6 mS
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6.4 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 +1.5V voltage can directly connected to these analog inputs. The +2.5V and CPU VOCRE, the inputs higher than 2.048V, should be reduced a factor with external resistors so as to obtain the input range. As Figure 3 shows.
VIN0(VCORE)(Max2.048V) Positive Inputs VIN2 +1.5V VIN3 VCC R1
Pin 16 Pin 15 Pin 20
+2.5Vin
VIN1(Max2.048V) Pin 14 R2 100K, 1% 8-bit ADC with 8mV LSB
100K, 1%
R Typical Thermister Connection
10K, 1% CPUT1
VREF
Pin 17 Pin 19
**The connections of CPUT2 is same as CPUT1
R THM 10K, 25 C
Figure. 3.
6.4.1 Voltage Monitor input can not be over 2.048V : The input voltage VIN1 or Vcore can be expressed as following equation:
VIN1 = 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 VIN3 can be subject to less than 2.048V for the maximum input range of the 8-bit ADC. The pin 20 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 W83L785R and the second function is that this voltage with 3.3V is connected to internal serial resistors to monitor the +3.3V voltage. The value 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.
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Vin = VCC x
20 K 1.1V 20 K + 40 K
where VCC is set to 3.3V.
6.5 Temperature Measurement Machine
The temperature data format is 8-bit two-complement for thermal sensor. The 8-bit temperature data can be obtained by reading the CR[26h] or CR[27h]. The format of the temperature data is show in Table 1. Temperature 8-Bit Binary +125C +25C +2C +1C +0C -1C -2C -25C -55C 0111,1101 0001,1001 0000,0010 0000,0001 0000,0000 1111,1111 1111,1110 1110,0111 1100,1001 Table 1. 8-Bit Digital Output 8-Bit Hex 7Dh 19h 02h 01h 00h FFh FEh E7h C9h
6.5.1 Monitor temperature from thermistor: The W83L785R can connect two thermistors to measure three different environment temperature or remote temperature. The specification of thermistor should be considered to (1) value is 3435K, (2) resistor value is 10K ohms at 25C. In the Figure 3, the themistor is connected by a serial resistor with 10K Ohms, then connect to VREF (pin 17).
6.5.2 Monitor temperature from Pentium IITM thermal diode The W83L785R can alternate the thermistor to Pentium IITM (Deschutes) thermal diode interface and the circuit connection is shown as Figure 4. The pin of Pentium IITM D- is connected to power
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supply ground (GND) and the pin D+ is connected to pin PIIx in the W83L785R. The resistor R=15K ohms should be connected to VREF to supply the diode bias current and the bypass capacitor C=3300pF should be added to filter the high frequency noise.
VREF R=15K, 1% Pentium II/III CPU Therminal Diode D+
PIITDx C=3300pF
D-
W83L785R
R=15K, 1%
Pentium II/III CPU Therminal Diode
D+ C=3300pF D-
PIITDx
Figure 4.
6.5.3 Over Temperature signal (OVT#) W83L785R provides two external thermal sensors to detect temperature. When detected temperature exceeds the over-temperature value, pin OVT# will be asserted until the temperature goes below the hysteresis temperature. Pin OVT# has 2 operating modes: 6.5.3.1 Comparator Mode : At this mode, temperature exceeding TO causes the OVT# output activated until the temperature is less than THYST. ( Figure 5) 6.5.3.2 Interrupt Mode: At this mode, temperature exceeding TO causes the OVT# output activated indefinitely until reset by reading interrupt status register. Temperature exceeding TO , then OVT# asserted, and then temperature going below THYST will also cause the OVT# activated indefinitely until reset by reading temperature sensor1 or sensor2 registers. Once the OVT# is activated by exceeding TO , then reset, if the temperature remains above THYST , the OVT# will not be activated again.( Figure 5)
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To
T HYST (Comparator Mode; default) OVT# (Interrupt Mode) OVT#
* * * *
*Interrupt Reset when Interrupt Status Register is read
Figure 5.
6.5.4 Temperature Fault (Temp_fault #) W83L785R provides a good protection for temperature. Set pin11(TEMP_FAULT#) to monitor temperature and enable TEMP_FAULT# function. When VTIN1(Pin19) or VTIN(Pin18) temperature exceeds Temperature fault limit in CR53,or R54 pin11 TEMP_FAULT# will be asserted(Figure 6).
TEMP_FAULT limit
TEMP_FAULT#
Figure 6. TEMP_FAULT
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6.6 FAN Speed Count and FAN Speed Control
6.6.1 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 as 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 CR28 or CR29, 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 CR47.bit0~2, bit4~6 which are three bits for divisor. That provides very low speed fan counter such as power supply fan. The followed table is an example for the relation of divisor, RPM, and count.
Divisor 1 2 (default) 4 8 16 32 64 128
Nominal RPM 8800 4400 2200 1100 550 275 137 68
Time per Revolution 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.
Counts 153 153 153 153 153 153 153 153
70% RPM 6160 3080 1540 770 385 192 96 48
Time for 70% 9.74 ms 19.48 ms 38.96 ms 77.92 ms 155.84 ms 311.68 ms 623.36 ms 1246.72 ms
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+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 1 Pin 2 FAN Out GND > 1K
Fan Input
Pin 1 Pin 2
W83L785R
3.3V Zener
FAN Connector
W83L785R
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 1 Pin 2 FAN Out GND > 1K
Fan Input
Pin 1 Pin 2
W83L785R
3.3V Zener
FAN Connector
W83L785R
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
6.6.2 Fan speed control The W83L785R provides four sets for fan PWM speed control. The duty cycle of PWM can be programmed by a 8-bit register which are defined in the CR81h and CR83h. The default duty cycle is set to 100%, that is, the default 8-bit registers is set to FFh. The expression of duty can be represented as follows.
Duty - cycle(%) =
Programmed 8 - bit Register Value x 100% 255
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+12V
+5V
R1 R2 G D NMOS S + C FAN PWM Clock Input PNP Transistor G
R1 R2 D NMOS S + C FAN PNP Transistor
PWM Clock Input
Figure 8.
6.7 SMI#
6.7.1 Temperature Pin SMI# for temperature has 3 modes. 6.7.1.1 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 9-1) 6.7.1.2 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 9-2 ) 6.7.1.3 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 9-3)
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T OI
T OI
T HYST
T HYST
SMI#
*
*
*
*
*
SMI#
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 9-1. Comparator Interrupt Mode
Figure 9-2. Two-Times Interrupt Mode
T OI
T HYST
SMI#
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 9-3. One-Time Interrupt Mode
6.7.2 Voltage SMI# 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 10-1) 6.7.3 Fan SMI# 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 10-2)
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Voltage High limit
Voltage Low limit
Fan Count limit
SMI#
*
*
*
*
SMI#
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 10-1. Voltage SMI# Mode
Figure 10-2. Fan SMI# Mode
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7. CONTENT OF DATA REGISTERS
7.1 Configuration Register Index 40h
Power on default [7:0] = 0000,0001 b Bit 7 Name INITIALIZATION Read/Write Read/Write Description A one restores power on default value to all registers except the Serial Bus Address register. This bit clears itself since the power on default is zero. Reserved Software Power Down. If set to 1 to power down this chip, but I2C interface is still working. Enable Temperature 2 Fault Function. When temperature 2 is out of the Temperature Fault Limit value (defined Index 54), the Pin 11 will go to low level. This function is wire-or with temperature 1 fault if temperature 1 fault function is enable. Enable Temperature 1 Fault Function. When temperature 1 is out of the Temperature Fault Limit value (defined Index 53), the Pin 11 will go to low level. This function is wire-or with temperature 2 fault if temperature 2 fault function is enable. A one disables the SMI# 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.
6-5 4 3
Reserved SOFT_PWDN EN_T2_FAULT
Read/Write Read/Write Read/Write
2
EN_T1_FAULT
Read/Write
1
INT_ CLEAR
Read/Write
0
START
Read/Write
7.2 SMI# Status Register 1 Index 41h
Power on default [7:0] = 0000,0000 b Bit 7 6 Name TEMP2 TEMP1 Read/Write Read Only Read Only Description A one indicates a High or Low limit has been exceeded from temperature sensor 2. (CPUT2/PII2) A one indicates a High or Low limit has been exceeded from temperature sensor 1. (CPUT1/PII1)
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5 4 3 2 1 0
FAN2 FAN1 VCC +1.5V +2.5V VCORE
Read Only Read Only Read Only Read Only Read Only Read Only
A one indicates the fan count limit has been exceeded. A one indicates the fan count limit has been exceeded. A one indicates a High or Low limit has been exceeded. ( VCC, +3.3V) A one indicates a High or Low limit has been exceeded. (+1.5V) A one indicates a High or Low limit has been exceeded. (+2.5V) A one indicates a High or Low limit has been exceeded. (Vcore A)
7.3 Reserved Index 42h
Reserved.
7.4 SMI# Mask Register 1 Index 43h
Power on default <7:0> = 0000,0000 b
Bit Name Read/Write Description
7 6 5 4 3 2 1 0
MSK_T2_SMI MSK_T1_SMI MSK_FAN2_SMI MSK_FAN1_SMI MSK_VCC_SMI MSK_+1.5V_SMI MSK_+2.5V_SMI MSK_VCORE_S MI
Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write
A one disables the corresponding interrupt status bit for SMI# interrupt. (Temperature 2) A one disables the corresponding interrupt status bit for SMI# interrupt. (Temperature 1) 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) 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. (+1.5V) A one disables the corresponding interrupt status bit for SMI# interrupt. (+2.5V) A one disables the corresponding interrupt status bit for SMI# interrupt. (Vcore)
7.5 Reserved Index 44h
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Read to return 00h.
7.6 Real Time Hardware Status Register I -- Index 45h
Power on - [7:0] = 0000,0000 b
Bit Name Read/Write Description
7
TEMP2_STS
Read Only
Temperature sensor 2 Status. Set 1, the voltage of temperature sensor is over the limit value. Set 0, the voltage of temperature sensor is during the limit range. Temperature sensor 1 Status. Set 1, the voltage of temperature sensor is over the limit value. Set 0, the voltage of temperature sensor is during the limit range. FAN 2 Status. Set 1, the fan speed counter is over the limit value. Set 0, the fan speed counter is in the limit range. FAN 1 Status. Set 1, the fan speed counter is over the limit value. Set 0, the fan speed counter is in the limit range. VCC (3+.3V) Voltage Status. Set 1, the voltage of VCC (+3.3V) is over the limit value. Set 0, the voltage of VCC (+3.3V) is in the limit range. +1.5V Voltage Status. Set 1, the voltage of +1.5V is over the limit value. Set 0, the voltage of +1.5V is in the limit range. +2.5V Voltage Status. Set 1, the voltage of +2.5V is over the limit value. Set 0, the voltage of +1.5V is in the limit range. VCORE Voltage Status. Set 1, the voltage of VCORE is over the limit value. Set 0, the voltage of VCORE is in the limit range.
6
TEMP1_STS
Read Only
5
FAN2_STS
Read Only
4
FAN1_STS
Read Only
3
VCC_STS
Read Only
2
+1.5V_STS
Read Only
1
+2.5V_STS
Read Only
0
VCORE_STS
Read Only
7.7 Reserved -- Index 46h
Read to return 00h.
7.8 Fan Divisor Register Index 47h
Power on default [7:0] = 0001,0001 b
Bit Name Read/Write Description
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7 6-4
Reserved F2_SP_CRTL[2:0]
Read/write Read/Write
Reserved. FAN2 Speed Control. 000 - divide by 1; 001 - divide by 2; 010 - divide by 4; 011 - divide by 8. 100 - divide by 16. 101 - divide by 32. 110 - divide by 64. 111 - divide by 128.
3 2-0
Reserved F1_SP_CTRL[2:0]
Read/write Read/Write
Reserved. FAN1 Speed Control. 000 - divide by 1; 001 - divide by 2; 010 - divide by 4; 011 - divide by 8. 100 - divide by 16. 101 - divide by 32. 110 - divide by 64. 111 - divide by 128.
7.9 FANIN1/GPO1, FANIN2/GPO2, SMI#/GPO7, and OVT#/GPIO8 Control RegisterIndex 48h
Power on default [7:0] = 0000,0000 b
Bit Name Read/Write Description
7
GPIO8_VAL
Read/Write
GPIO8 Output Value. GPIO8 output value if EN_GPIO8 is set to 1. Write 1, then pin 8 (GPIO8) always generate logic high signal. Write 0, pin 8 (GPIO8) always generates logic low signal. This bit default 0. Enable GPIO8 Function. Which enable multiple function pin 8, named OVT#/GPIO8, GPIO8 function. Set to 0 (default), pin 8 (OVT#/GPIO8) acts as OVT#. Set to 1, this pin 8 acts as GPIO8 control function and the output value of GPIO8 is programmed by this register bit 7.
6
EN_GPIO8
Read/Write
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5
GPIO7_VAL
Read/Write
GPIO7 Output Value. GPIO7 output value if EN_GPIO7 is set to 1. Write 1, then pin 7 (GPIO7) always generate logic high signal. Write 0, pin 7 (GPIO7) always generates logic low signal. This bit default 0. Enable GPIO7 Function. Which enable multiple function pin 7, named SMI#/GPIO7, GPIO7 function. Set to 0 (default), pin 7 (SMI# /GPIO7) acts as SMI# which is fan count out of the limit value. Set to 1, this pin 7 acts as GPIO7 control function and the output value of GPIO7 is programmed by this register bit 5. GPIO2 Output Value. GPIO2 output value if EN_GPIO2 is set to 1. Write 1, then pin 2 (GPIO2) always generate logic high signal. Write 0, pin 2 (GPIO2) always generates logic low signal. This bit default 0. Enable GPIO2 Function. Which enable multiple function pin 2, named FANIN2/GPIO2, GPIO2 function. Set to 0 (default), pin 2 (FANIN2/GPIO2) acts as FANIN2 which is fan clock input. Set to 1, this pin 2 acts as GPIO2 control function and the output value of GPIO2 is programmed by this register bit 3. This output pin GPIO2 can connect to power PMOS gate to control FAN ON/OFF. GPIO1 Output Value. GPIO1 output value if EN_GPIO1 is set to 1. Write 1, then pin 1 (GPIO1) always generate logic high signal. Write 0, pin 1 (GPIO1) always generates logic low signal. This bit default 0. Enable GPIO1 Function. Which enable multiple function pin 1, named FANIN1/GPIO1, GPIO1 function. Set to 0 (default), pin 1 (FANIN1/GPIO1) acts as FANIN1 which is fan clock input. Set to 1, this pin 1 acts as GPIO1 control function and the output value of GPO1 is programmed by this register bit 1. This output pin GPIO1 can connect to power PMOS gate to control FAN ON/OFF.
4
EN_GPIO7
Read/Write
3
GPIO2_VAL
Read/Write
2
EN_GPIO2
Read/Write
1
GPIO1_VAL
Read/Write
0
EN_GPIO1
Read/Write
7.10 TEMP_FAULT#/GPIO11, +2.5V/GPO14, +1.5V/GPO15, and VCORE/GPO16 Control Register- Index 49h
Power on default [7:0] = 0000,0000 b
Bit Name Read/Write Description
7
GPIO16_VAL
Read/Write
GPIO16 Output Value. GPIO16 output value if EN_GPIO16 is set to 1. Write 1, then pin 16 (GPIO16) always generate logic high signal. Write 0, pin 16 (GPIO16) always generates logic low signal. This bit default 0. Read this register will return this pin value.
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6
EN_GPIO16
Read/Write
Enable GPIO16 Function. Which enable multiple function pin 16, named VCORE/GPIO16, GPIO16 function. Set to 0 (default), pin 16 (VCORE /GPIO16) acts as VCORE. Set to 1, this pin 16 acts as GPIO16 control function and the output value of GPIO16 is programmed by this register bit 7. GPIO15 Output Value. GPIO15 output value if EN_GPIO15 is set to 1. Write 1, then pin 15 (GPIO15) always generate logic high signal. Write 0, pin 15 (GPIO15) always generates logic low signal. This bit default 0. Read this register will return this pin value. Enable GPIO14 Function. Which enable multiple function pin 15, named +1.5V/GPIO15, GPIO15 function. Set to 0 (default), pin 15 (FANIN2/GPO2) acts as +1.5V which is monitor voltage input. Set to 1, this pin 15 acts as GPIO15 control function and the output value of GPIO15 is programmed by this register bit 5. GPIO14 Output Value. GPIO14 output value if EN_GPIO14 is set to 1. Write 1, then pin 14 (GPIO14) always generate logic high signal. Write 0, pin 14 (GPO14) always generates logic low signal. This bit default 0. Read this register will return this pin value. Enable GPIO14 Function. Which enable multiple function pin 14, named +2.5V/GPIO14, GPIO14 function. Set to 0 (default), pin 14 (+2.5V/GPIO14) acts as +2.5V. Set to 1, this pin 1 acts as GPIO14 control function and the output value of GPIO14 is programmed by this register bit 3. GPIO11 Output Value. GPIO11 output value if EN_GPIO11 is set to 1. Write 1, then pin11 (GPIO11) always generate logic high signal. Write 0, pin 11 (GPIO11) always generates logic low signal. This bit default 0. Read this register will return this pin value. Enable GPIO11 Function. Which enable multiple function pin 11, named TEMP_FAULT#/GPIO11, GPIO11 function. Set to 0 (default), pin 11 (TEMP_FAULT# /GPIO11) acts as TEMP_FAULT#. Set to 1, this pin 11 acts as GPIO11 control function and the output value of GPIO11 is programmed by this register bit 1.
5
GPO15_VAL
Read/Write
4
EN_GPIO15
Read/Write
3
GPIO14_VAL
Read/Write
2
EN_GPIO14
Read/Write
1
GPIO11_VAL
Read/Write
0
EN_GPIO11
Read/Write
7.11 GPIO1/2, GPIO7/8, and GPIO11/14/15/16 Output Control Register- Index 4Ah
Power on default [7:0] = 0000,0000 b
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Bit
Name
Read/Write
Description
7 6 5 4 3 2 1 0
EN_GP16OUT EN_GP15OUT EN_GP14OUT EN_GP11OUT EN_GP8OUT EN_GP7OUT EN_GP2OUT EN_GP1OUT
Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write Read/Write
Enable GPIO16 (Pin 16) output function if set Otherwise, this pin serves as input. (Default is input) Enable GPIO15 (Pin 15) output function if set Otherwise, this pin serves as input. (Default is input) Enable GPIO14 (Pin 14) output function if set Otherwise, this pin serves as input. (Default is input) Enable GPIO11 (Pin 11) output function if set Otherwise, this pin serves as input. (Default is input)
to 1. to 1. to 1. to 1.
Enable GPIO8 (Pin 8) output function if set to 1. Otherwise, this pin serves as input. (Default is input) Enable GPIO7 (Pin 7) output function if set to 1. Otherwise, this pin serves as input. (Default is input) Enable GPIO2 (Pin 2) output function if set to 1. Otherwise, this pin serves as input. (Default is input) Enable GPIO1 (Pin 1) output function if set to 1. Otherwise, this pin serves as input. (Default is input)
7.12 GPIO5, GPIO6, and GPIO13 Control Register -- Index 4Bh
Power on default [7:0] = 0000,0000 b
Bit Name Read/Write Description
6,7 5 4
Reserved EN_GP13OUT GPIO13_VAL
Read/Write Read/Write Read/Write
Reserved Enable GPIO13 (Pin 13) output function if set to 1. Otherwise, this pin serves as input. (Default is input) GPIO13 Output Value. GPIO13 output value if EN_GP13OUT is set to 1. Write 1, then pin 13 (GPIO13) always generate logic high signal. Write 0, pin 13 (GPIO13) always generates logic low signal. This bit default 0. Read will return this pin value Enable GPIO6 (Pin 6) output function if set to 1. Otherwise, this pin serves as input. (Default is input) GPIO6 Output Value. GPIO6 output value if EN_GP6OUT is set to 1. Write 1, then pin 6 (GPIO6) always generate logic high signal. Write 0, pin 6 (GPIO6) always generates logic low signal. This bit default 0. Read will return this pin value
3 2
EN_GP6OUT GPIO6_VAL
Read/Write Read/Write
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1 0
EN_GP5OUT GPIO5_VAL
Read/Write Read/Write
Enable GPIO5 (Pin 5) output function if set to 1. Otherwise, this pin serves as input. (Default is input) GPIO5 Output Value. GPIO5 output value if EN_GP5OUT is set to 1. Write 1, then pin 5 (GPIO5) always generate logic high signal. Write 0, pin 5 (GPIO5) always generates logic low signal. This bit default 0. Read will return this pin value
7.13 Winbond Vendor ID (Low Byte) - Index 4Ch
Power-on default [7:0] = 1010,0011 b (A3h)
Bit Name Read/Write Description
7:0
VIDL[7:0]
Read Only
Vendor ID Low Byte. Default A3h.
7.14 Winbond Vendor ID (High Byte) - Index 4Dh
Power-on default [7:0] = 0101,1100 b (5Ch)
Bit Name Read/Write Description
7:0
VIDH[7:0]
Read Only
Vendor ID High Byte. Default 5Ch
7.15 Chip ID -- Index 4Eh
Power on default [7:0] = 0101,0000 b
Bit Name Read/Write Description
7-0
CHIPID[7:0]
Read Only
Winbond Chip ID number. Read this register will return 60h for W83L785R.
7.16 Reserved -- Index 4Fh
Reserved.
7.17 OVT# Property Select - Index 50h
Power on default [7:0] = 0000,0000 b
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Bit
Name
Read/Write
Description
7-5 4
Reserved OVT_MD
Read/Write Read/Write
Reserved. OVT# Mode Select. There are two OVT# signal output type. <0> - Comparator Mode: (Default) Temperature exceeding TO causes the OVT# output activated until the temperature is less than THYST. <1> - Interrupt Mode: Setting temperature exceeding TO causes the OVT# output activated indefinitely until reset reading temperature sensor 1/2 registers. Temperature exceeding TO, then OVT# reset, and then temperature going below THYST will also cause the OVT# activated indefinitely until reset by reading temperature sensor 1/2. Once the OVT# will not be activated by exceeding TO, then reset, if the temperature remains above THYST, the OVT# will not be active again.
3 2
Reserved EN_OVT2
Read/Write Read/Write
Reserved Enable temperature sensor 2 over-temperature (OVT) output if set to 1. Default 0, disable OVT2 output through pin OVT#. The pin OVT# is wire OR with OVT1. Default disable temperature 2 OVT# function. Enable temperature sensor 1 over-temperature (OVT) output if set to 1. Default 0, disable OVT1 output through pin OVT#. The pin OVT# is wire OR with OVT2. Default disable temperature 1 OVT# function. Over-Temperature Polarity. Write 1, OVT# active high. Write 0, OVT# active low. Default 0.
1
EN_OVT1
Read/Write
0
OVTPOL
Read/Write
7.18 SMI# Property Select -- Index 51h
Power on - <7:0> --0000,0100 b
Bit Name Read/Write Description
7-4
Reserved
Read/Write
Reserved.
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3-2
TEMP_SMI_MD[1:0]
Read/Write
Temperature SMI Mode Select. <00> - Comparator Interrupt Mode: Temperature 1/2 exceeds TO (Over-temperature) limit causes and interrupt and this interrupt will be reset by reading all the Interrupt Status. <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 all 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.
1 0
EN_SMI# SMIPOL
Read/Write Read/Write
Enable SMI# Output. A one enables the SMI# Interrupt output. SMI# Polarity. Write 1, SMI# active high. Write 0, SMI# active low. Default 0.
7.19 Thermal Sensor 1/2 Type Register -- Index 52h
Power on default [7:0] = 0000-0000 b
Bit Name Read/Write Description
7-4 3-2
Reserved T2_TYPE[1:0]
Read/Write Read/Write
Reserved. Temperature sensor 2 (CPU) type. 0x - Thermistor (10K @ 25 degree C, B=3435). 11 - Intel thermal diode.
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1-0
T1_TYPE[1:0]
Read/Write
Temperature sensor 2 (environment) type. 0x - Thermistor (10K @ 25 degree C, B=3435) 11 - Intel thermal diode.
7.20 Temperature Sensor 1 Fault Limit -- Index 53h
Power on default [7:0] = 0111-1111 b
Bit Name Read/Write Description
7-0
TEMP1_LM
Read/Write
Temperature sensor 1 Limit Value.
7.21 Temperature Sensor 2 Fault Limit -- Index 54h
Power on default [7:0] = 0111-1111 b
Bit Name Read/Write Description
7-0
TEMP2_LM
Read/Write
Temperature sensor 2 Limit Value.
7.22 Reserved -- Index 55h ~ 7Fh
Reserved.
7.23 PWM 1 Pre-Scale Register-- Index 80h
Power on default [7:0] = 0000-0001 b
Bit Name Read/Write Description
7
PWM_CLK_SEL1
Read/Write
PWM 1 Input Clock Select. This bit select PWM 1 input clock. 0: 1 MHz 1: 125 KHz
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6-0
PRE_SCALE1[6:0]
Read/Write
PWM 1 Input Clock Pre-Scale. The divider of input clock is the number defined by pre-scale. Thus, writing 0 transfers the input clock directly to counter. The maximum divider is 128 (7Fh). 00h : divider is bypass 01h : divider is 1 02h : divider is 2 : :
PWM output frequency is (Pre-scale frequency) / 256 .
125KHz
For example, if setting this register 81h, the pin FANOUT0 output frequency =
256
1 = 488 Hz
7.24 PWM 1 Duty Cycle Select Register-- 81h
Power on default [7:0] 1111,1111 b
Bit Name Read/Write Description
7-0
PWM1_DC[7:0]
Read/Write
PWM 1 Duty Cycle. This 8-bit register determines the number of input clock cycles, out of 256-cycle period, during which the PWM output is high. 00h: PWM output is always logical Low. FFh: PWM output is always logical High. XXh: PWM output logical High (XX/256*100%) during one cycle. percentage is
7.25 PWM 2 Pre-Scale Register-- Index 82h
Power on default [7:0] = 0000,0001 b
Bit Name Read/Write Description
7
PWM_CLK_SEL2
Read/Write
PWM 2 Input Clock Select. This bit select PWM 2 input clock. 0: 1 MHz 1: 125 KHz
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6-0
PRE_SCALE2[6:0]
Read/Write
PWM 2 Input Clock Pre-Scale. The divider of input clock is the number defined by pre-scale. Thus, writing 0 transfers the input clock directly to counter. The maximum divider is 128 (7Fh). 00h : divider is 1 01h : divider is 2 02h : divider is 3 : :
7.26 PWM2 Duty Cycle Select Register-- Index 83h
Power on default [7:0] = 1111,1111 b
Bit Name Read/Write Description
7-0
PWM2_DC[7:0]
Read/Write
PWM 2 Duty Cycle. This 8-bit register determines the number of input clock cycles, out of 256-cycle period, during which the PWM output is high. 00h: PWM output is always logical Low. FFh: PWM output is always logical High. XXh: PWM output logical High XX/256*100% during one cycle. percentage is
7.27 Reserved Register-- Index 84h
Power on default [7:0] = 0000,0000 b
7.28 Temperature Sensor 1 (for Environment) Offset Register - Index 85h
Power-on default [7:0] = 0000,0000 b
Bit Name Read/Write Description
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7-0
OFFSET1[7:0]
Read/Write
Temperature 1 base temperature. The temperature is added by both monitor value and offset value. 0111,1111 => +127 degree C 0111,1110 => +126 degree C : 0000,0001 => +1 degree C 0000,0000 => +0 degree C 1111,1111 => -1 degree C 1111,1110 => -2 degree C : 1000,0000 => -128 degree
7.29 Temperature Sensor 2 (for CPU) Offset Register - Index 86h
Power-on default [7:0] = 0000,0000 b
Bit Name Read/Write Description
7-0
OFFSET2[7:0]
Read/Write
Temperature 2 base temperature. The temperature is added by both monitor value and offset value. 0111,1111 => +127 degree C 0111,1110 => +126 degree C : 0000,0001 => +1 degree C 0000,0000 => +0 degree C 1111,1111 => -1 degree C 1111,1110 => -2 degree C : 1000,0000 => -128 degree
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8. VALUE RAM AND LIMIT VALUE
8.1 Value RAM Index 20h- 3Fh or 60h - 7Fh
Index A7-A0 20h 21h 22h 23h 24h 25h 26h 27h 28h VCORE reading +2.5V reading +1.5V reading VCC reading (internal divisor 3) Reserved Reserved Temperature 2 reading Temperature 1 reading FAN1 reading Note: This location stores the number of counts of the internal clock per revolution. 29h FAN2 reading Note: This location stores the number of counts of the internal clock per revolution. 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh 30h 31h 32h 33h 34h 35h Reserved VCORE High Limit. (0xff) VCORE Low Limit. (0x00) +2.5V High Limit. (0xff) +2.5V Low Limit. (0x00) +1.5V High Limit. (0xff) +1.5V Low Limit. (0x00) VCC High Limit. (0xff) VCC Low Limit. (0x00) Reserved Reserved Reserved Description
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36h 37h 38h 39h 3Ah 3Bh
Reserved Over Temperature 2 Limit (High). (0x50) Temperature 2 Hysteresis Limit (Low). (0x4b) Over Temperature 1 Limit (High). (0x50) Temperature 1 Hysteresis Limit (Low). (0x4b) FAN1 Fan Count Limit. (0xff) Note: It is the number of counts of the internal clock for the Low Limit of the fan speed.
3Ch
FAN2 Fan Count Limit. (0xff) Note: It is the number of counts of the internal clock for the Low Limit of the fan speed.
3Dh 3E- 3Fh
Reserved Reserved
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9. SPECIFICATIONS
9.1 Absolute Maximum Ratings
PARAMETER Power Supply Voltage Input Voltage Operating Temperature Storage Temperature RATING -0.5 to 7.0 -0.5 to VCC+0.5 0 to +70 -55 to +150 UNIT 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
(Ta = 0 C to 70 C, VDD = 5V 10%, VSS = 0V) PARAMETER Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage SYM. VIL VIH VOL VOH ILIH ILIL 2.4 +10 -10 2.0 0.4 MIN. TYP. MAX. 0.8 UNIT V V V V A A IOL = 12 mA IOH = - 12 mA VIN = VDD VIN = 0V CONDITIONS I/O12t - TTL level bi-directional pin with source-sink capability of 12 mA
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 VtVt+ VTH VOL VOH 2.4 0.5 1.6 0.5 0.8 2.0 1.2 0.4 1.1 2.4 V V V V V VDD = 5 V VDD = 5 V VDD = 5 V IOL = 12 mA IOH = - 12 mA
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Input High Leakage Input Low Leakage
ILIH ILIL
+10 -10
A A
VIN = VDD VIN = 0V
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9.2 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 Output Low Voltage Output Low Voltage Output Low Voltage INt - TTL level input pin Input Low Voltage Input High Voltage Input High Leakage Input Low Leakage INts VIL VIH ILIH ILIL VtVt+ VTH ILIH ILIL 0.5 1.6 0.5 2.0 +10 -10 0.8 2.0 1.2 +10 -10 0.8 V V A A 1.1 2.4 VIN = VDD VIN = 0 V V V V A A VCC = 5 V VCC = 5 V VCC = 5 V VIN = VCC VIN = 0 V VOL VOH VOL VOL VOL 2.4 0.4 0.4 0.4 0.4 V V V V V IOL = 12 mA IOH = -12 mA IOL = 8 mA IOL = 12 mA IOL = 48 mA
OD8 - Open-drain output pin with sink capability of 8 mA OD12 - Open-drain output pin with sink capability of 12 mA OD48 - Open-drain output pin with sink capability of 48 mA
- TTL level Schmitt-triggered input pin
Input Low Threshold Voltage Input High Threshold Voltage Hysteresis Input High Leakage Input Low Leakage
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9.3 AC Characteristics
t SCL
SCL
t HD;SDA
t HD;DAT t SU;STO
SDA IN
VALID DATA
t SU;DAT
SDA OUT Serial Bus Timing Diagram
Serial Bus Timing PARAMETER 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 SYMBOL t SCL tHD;SDA tSU;STO tSU;DAT tHD;DAT tR tF
-
MIN. 10 4.7 4.7 120 5
MAX.
UNIT uS uS uS nS nS
1.0 300
uS nS
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10. HOW TO READ THE TOP MARKING
The top marking of W83L785R
W83L785R
2826978Y
046OA
Left: Winbond logo 1st line: Type number W83L785R, R means SSOP (Thickness = 209mil). 2nd line: Tracking code 2 826978Y 2: wafers manufactured in Winbond FAB 2 826978Y: wafer production series lot number 3rd line: Tracking code 046 A A 046: packages made in 2000, week 46 O: assembly house ID; A means ASE, O means OSE, G means Greatek A: IC revision; A means version A, B means version B
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11. PACKAGE DRAWING AND DIMENSIONS
20 SSOP-209 mil
D
2
DTEAIL A
1.65
1.75
0.065
0.069
E
0.22 0.09
0.38 0.25
0.009 0.004
0.015 0.010
HE 0.65
1
0.55
0.75 1.25
0.95
0.021
0.0256 0.030 0.050
0.037
0.10
A2 A
SEATING PLANE
0.004
Y
L L1
e
b
A1
Headquarters
No. 4, Creation Rd. III Science-Based Industrial Park Hsinchu, Taiwan TEL: 886-35-770066 FAX: 886-35-789467 www: http://www.winbond.com.tw/
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II 123 Hoi Bun Rd., Kwun Tong Kowloon, Hong Kong TEL: 852-27516023-7 FAX: 852-27552064
Winbond Electronics (North America) Corp.
2730 Orchard Parkway San Jose, CA 95134 U.S.A. TEL: 1-408-9436666 FAX: 1-408-9436668
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd. Taipei, Taiwan TEL: 886-2-7190505 FAX: 886-2-7197502 TLX: 16485 WINTPE
Please note that all data and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this data sheet belong to their respective owners. 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 sale.
43
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Publication Release Date: Aug. 2001 Revision 1.0
12. W83L785R SCHEMATICS
Rev. 0.1:W83L785R
0.2:R29 30K
application
to 15K 1K change
circuit.
4.7K
VCC
VCC=3.3V
VCC
change
0.3:R44,R45,R46
to
VOLTAGE
C1 10u/16V C2 0.1u V1 R16 10K V2 R17
SENSORING
R
CIRCUIT
CPU_VCORE
(max
2.048V)
10K 1.5V
R1 4.7K
R2 4.7K U1 FANIN1 FANIN2 PWMOUT1 PWMOUT2 1 2 3 4 5 6 7 8 9 10 FANIN1/GPIO1 VCC FANIN2/GPIO2 VTIN1 PWMOUT1 VTIN2 PWMOUT2 VREF GPIO5 VCORE/GPIO16 GPIO6 +1.5V/GPIO15 SMI#/GPIO7 +2.5V/GPIO14 OVT#/GPIO8 GPIO13 SCL GND SDA TEMP_FAULT#/GPO11 W83785R 20 19 18 17 16 15 14 13 12 11 VTIN1 VTIN2 VREF V1 V2 V3 GP13 VCC
R18
100k
2.5V
V3 R11 10K
R19
100k
To
chipset
}
EXTSMI# THRM#
GPIO5 GPIO6
SMI# OVT# R13 4.7K
SCL SDA
TEMP_FAULT#
R14 4.7K
VCC
VCC R38 4.7k SDA VREF R29 15K 1% R44 4.7K R45 4.7K R46 4.7K From PII/PIII CPU R C4 CAP 3300p VTIN1 SCL R41 0 R40 0 R39 4.7k
VCC
TEMPERATURE
SENSORING
CIRCUIT
SMDAT SMCLK
{
PIID+ PIID-
GP5 GP6 GP13 VREF R34 10K 1% R RT1
T
VTIN2
10K 1%
THERMISTOR
NOTE:
ALL
GPIO
PIN
Must
add
pull-up
resistor
PWM1
Circuit
VCC
for
FAN1
speed
R20 4.7K 1K
Control
Fan5VCC
FOR
5V
FAN
PWM1
Circuit
VCC
for
FAN1
speed
R20 4.7K 1K
Control
+12V
FOR
12V
FAN
R21 4.7K
R22
Q1 3906 JP1 3 2 1
D1 1N4148
R24 4.7K R27 2K
R21 4.7K
R22
Q1 3906 JP1 3 2 1
D1 1N4148
R24 4.7K R27 27K
PWMOUT1 PWMOUT1 is open-drain default.
R26
100
Q2 MOSFET N 47u
C3
+
Signal Power GND
FANIN1 R28 10K
PWMOUT1 PWMOUT1 is open-drain default.
R26
100
Q2 MOSFET N 47u
C3
+
Signal Power GND
FANIN1 R28 10K
HEADER 3
HEADER 3
W83784R has SMARTFAN function
W83784R has SMARTFAN function
PWM2
Circuit
VCC
for
FAN2
speed
R30 R32 4.7K 1K
Control
Fan5VCC
FOR
5V
FAN
PWM2
Circuit
VCC
for
FAN2
speed
R30 R32 4.7K 1K
Control
+12V
FOR
12V
FAN
R31 4.7K
Q3 3906 JP2 3 2 1
D2 1N4148
R33 4.7K R36 2K
R31 4.7K
Q3 3906 JP2 3 2 1
D2 1N4148
R33 4.7K R36 27K
PWMOUT2
R35
100
Q4 MOSFET N
C5 47u
+
Signal Power GND
FANIN2 R37 10K
PWMOUT2
R35
100
Q4 MOSFET N
C5 47u
+
Signal Power GND
FANIN2 R37 10K
PWMOUT2 is open-drain default. W83784R has SMARTFAN function
HEADER 3
PWMOUT2 is open-drain default. W83784R has SMARTFAN function
HEADER 3
WINBOND ELECTRONICS CORP.
Title W83L785R Application Circuit Rev 0.3 Sheet 1
Size Document Number Custom 785.SCH Date: Monday, July 02, 2001
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