W83L785TS-S

W 83L785TS-S W inbond H/W Monitoring IC W83L785TS-S Preliminary W83L785TS-S Data Sheet Revision History Pages 1 2 3 4 5 6 7 8 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. n.a. Dates Versio n Version on Web n.a. Main Contents All the version before 0.50 are for internal use. 2 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary TABLE OF CONTENTS 1. GENERAL DESCRIPTION.......................................................................... 5 2. FEATURES ................................................................................................... 5 3. KEY SPECIFICATIONS............................................................................... 5 4. PIN CONFIGURATION .............. ERROR! BOOKMARK NOT DEFINED.6 5. PIN DESCRIPTION ...................................................................................... 6 6.. FUNCTIONAL DESCRIPTION................................................................... 7 6.1 6.2 6.2.1 6.3 6.3.1 6.3.2 6.4 6.5 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 8.1 9.1 9.2 9.3 General Description......................................................... Error! Bookmark not defined. Access Interface................................................................................................................ 7 The first serial bus access timing are shown as follow:................................................... 7 Analog Inputs ................................................................................................................... 8 Temperature Measurement Machine ............................................................................. 8 Monitor temperature from thermal diode ....................................................................... 8 OFFSET and Temperature Fault Limit (FAULT_LIMIT) Setting ................................... 9 TEMP_FAULT# ............................................................................................................ 10 Configuration Register  Index 40h ............................................................................. 11 Reserved --Index 41h~4Bh ............................................................................................. 11 Winbond Vendor ID (Low Byte) - Index 4Ch (Auto Increase)....................................... 11 Winbond Vendor ID (High Byte) - Index 4Dh (No Auto Increase)................................ 11 Chip ID -- Index 4Eh...................................................................................................... 12 Reserved -- Index 4Fh~51h ............................................................................................ 12 Thermal Sensor 1/2 Type Register -- Index 52h............................................................. 12 Temperature 1 Fault Limit -- Index 53h......................................................................... 12 Reserved --Index 54h~84h) ............................................................................................ 13 Temperature 1 OFFSET Register-- Index 85h............................................................... 13 Value RAM  Index 20h- 3Fh....................................................................................... 13 Absolute Maximum Ratings............................................................................................ 14 DC Characteristics......................................................................................................... 14 AC Characteristics ......................................................................................................... 16 7. CONTENT OF DATA REGISTERS .......................................................... 11 8. VALUE RAM AND LIMIT VALUE ........................................................... 13 9. SPECIFICATIONS..................................................................................... 14 10. HOW TO READ THE TOP MARKING................................................... 17 11. PACKAGE DRAWING AND DIMENSIONS .......................................... 18 3 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 12. W83L785TR SCHEMATICS..................................................................... 19 4 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 1. GENERAL DESCRIPTION The W83L785TS-S a low-cost, fully integrated temperature sensor issues an alert signal when the monitoring temperature exceeds the threshold. The W83L785TS-S provides 1 remote temperature sensing connected to CPU thermal diode. There is one dedicated OFFSET/ FAULT_LIMIT pin to compensate inaccuracy of CPU temperature measurement by adjusting external two serial resistors and set up temperature fault threshold. When W83L785TS-S begins monitoring, the Watch Dog machine monitors every function and store the value to registers. If the monitored value exceeds the limit value, the interrupt status will be set to 1.The W83L785TS-S communicates over a two-wire serial interface compatible with SMBus standards. 2. FEATURES • • • • • • • Low Cost 1 thermal inputs for remote CPU thermal diode WATCHDOG comparison of all monitored values Auto Protection When Over Temperature I2CTM serial bus interface 2.7~5.5V Supply 8-pin SOP (150mil) 3. KEY SPECIFICATIONS • Monitoring Temperature Range and Accuracy - 40°C to +120°C • Supply Voltage • Operating Supply Current • ADC Resolution ± 3°C(Max) 2.7V ~ 5.5V 2 mA typ. 8 Bits 5 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 4. PIN CONFIGURATION VDD CPUT VREF OFFSET/FAULT_LIMIT 1 2 3 4 785TS-S 8 7 6 5 SCL SDA TEMP_FAULT# GND 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 VDD CPUT VREF OFFSET/ FAULT_LIMIT GND TEMP_FAULT# SDA SCL PIN NO. 1 2 3 4 TYPE POWER AIN AOUT VIN DESCRIPTION +3.3 VDD (or 3.3VSB) power supply input. CPU thermal diode input. Reference Voltage. This pin can be used to change CPUT offset value and set up the temperature_fault limit.by adjusting two external serial resistors. Ground. Active-Low output. This pin will be a logic LOW when CPU temperature exceeds limit. Serial Bus bi-directional Data. Serial Bus Clock. 5 6 7 8 Ground OD12 I/OD12 INt s 6 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 6. FUNCTIONAL DESCRIPTION 6.1 General Description The W83L785TS-S a low-cost, fully integrated temperature sensor issues an alert signal when the monitoring temperature exceeds the threshold. The W83L785TS-S provides 1 remote temperature sensing connected to CPU thermal diode. There is 1 dedicated OFFSET/ FAULT_LIMIT pin to compensate inaccuracy of CPU temperature by adjusting external two serial resistors and set up temperature fault threshold. When W83L785TS-S 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 W83L785TS-S provides I2C Serial Bus to read/write internal registers. In the W83L785TS-S, the I2C address defined value is 0101110. 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 1 0 R/W Ack by 785TR D7 D6 D5 D4 D3 D2 D1 D0 Ack by 785TR 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 785TR Stop by Master Frame 3 Data Byte Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte 7 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary (b) Serial bus read form internal address register followed by the data byte SCL SDA 0 7 8 0 7 8 0 1 0 1 1 1 0 R/W ack by 785TR D7 D6 D5 D4 D3 D2 D1 D0 ack by 785TR Frame 1 Serial Bus Address Byte 0 SCL(Continued) SDA(Continued) 0 Repeat start by Master 1 0 1 1 1 1 2 3 4 5 Frame 2 Internal Index Register Byte 7 8 0 1 2 3 4 5 6 6 7 8 0 R/W ack by 785TR D7 D6 D5 D4 D3 D2 by D1 D0 784R Ack Nack Stop by Master by Master Frame 3 Serial Bus Byte Frame 4 Data Byte from 785TR Figure 2. Serial Bus read from Internal Address Register followed by the Data Byte 6.3 Analog Inputs 6.3.1 Temperature measurement machine The W83L785TS-S provides a best solution to prevent CPU from being damaged. The temperature data format is 8-bit two-complement for thermal sensor. The 8-bit temperature data can be obtained by reading the register. The format of the temperature data is show in Table 1. Temperature +125°C +25°C +2°C +1°C +0°C -1°C -2°C -25°C -55°C Table 1: The format of the temperature data 8-Bit Digital Output 8-Bit Binary 8-Bit Hex 0111,1101 7Dh 0001,1001 19h 0000,0010 02h 0000,0001 01h 0000,0000 00h 1111,1111 FFh 1111,1110 FEh 1110,0111 E7h 1100,1001 C9h 8 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 6.3.2 Monitor temperature from thermal diode : The W83L785TS-S can monitor the temperature from the thermal diode and issue temperature fault signal to activate system protection when temperature exceeds the threshold. The terminators of thermal diode are connected to power supply ground (GND) and the CPUT(pin2) in the W83L785TS-S. The resistor R=15K ohms should be connected to VREF to supply the diode bias current VREF R=15K, 1% Microprocessor Therminal Diode D+ W83L785TS-S CPUT1 D- C=3300pF Figure 3 6.4 OFFSET and Temperature Fault Limit (FAULT_LIMIT) Setting There is one dedicated pin to change the offset value and temperature fault limited value by adjusting external serial resistors. By adjusting external resistors, there are two sets of temperature fault limit to be chosen and they are 85,90oC. As for the application circuit and corresponding resistors value, please see the figure and table as below. VREF R1 OFFSET R2 Figure 4: OFFSET Setting 9 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary Table 2: The CPU OFFSET value and Temperature Fault Limited Value TFAULT_LIMIT OFFSET R1 R2 0000XXXX 85 0 X 10K 0001XXXX 85 22 91K 9.1K 0010XXXX 85 24 30K 5.6K 0011XXXX 85 26 20K 5.6K 0100XXXX 85 28 13K 5.1K 0101XXXX 85 30 91K 4.7K 0110XXXX 85 32 68K 4.7K 0111XXXX 85 34 18K 16K 1000XXXX 90 0 16K 18K 1001XXXX 90 22 5.1K 7.5K 1010XXXX 90 24 4.7K 9.1K 1011XXXX 90 26 4.7K 12K 1100XXXX 90 28 5.1K 18K 1101XXXX 90 30 3K 16K 1110XXXX 90 32 9.1K 91K 1111XXXX 90 34 10K X 6.5 TEMP_FAULT# The W83L785TS-S provides a good protection for temperature sensing. The W83L785TS-S will issue an alert signal when the monitoring temperature exceeds the threshold. Setting pin 6 (TEMP_FAULT#) to monitor temperature and enable TEMP_FAULT# function. When monitoring CPUT1 (Pin 2) temperature exceeds temperature fault limit (ex: 90oC) in CR26, or CR27, pin6 TEMP_FAULT# will be asserted. As figure 5 shows. TEMP_FAULT Limit 90 DEG 60 DEG TEMP_FAULT# Figure 5. TEMP_FAULT# 10 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 7. CONTENT OF DATA REGISTERS 7.1 Configuration Register  Index 40h Power on default [7:0] = 0010,1101 b Bit Name Read/Write 7 INITIALIZATION 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 Reserved Software Power Down. If setting to 1,this chip will power down, but I2C interface is still working. Reserved Enable Temperature Fault Function. When Temperature 1 is out of the Temperature1 Fault Limit value (defined in Index 85), the Pin 6 will go to low level. The device will stop monitoring. It will resume upon clearing of this bit. A one enables startup of monitored activities, a zero puts the part in standby mode. 6 5 4 3 2 Reserved Reserved SOFT_PWDN Reserved En _Temp _FAULT INT_ CLEAR START Read/Write Read/Write Read/Write Read/Write Read/Write 1 0 Read/Write Read/Write 7.2 Reserved --Index 41h~4Bh 7.3 Winbond Vendor ID (Low Byte) - Index 4Ch (Auto Increase) 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. 7.4 Winbond Vendor ID (High Byte) - Index 4Dh (No Auto Increase) 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 11 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 7.5 Chip ID -- Index 4Eh Power on default [7:0] = 0111,0000 b Bit Name Read/Write Description 7-0 CHIPID[7:0] Read Only Winbond Chip ID number. Read this register will return 70h for W83L785TS. 7.6 Reserved -- Index 4Fh~51h 7.7 Thermal Sensor 1/2 Type Register -- Index 52h Power on default [7:0] = 0000-0011 b Bit Name Read/Write Description 7-2 1-0 Reserved T1_TYPE[1:0] Read/Write Read/Write Reserved. Temperature sensor 2 (environment) type. 0x - Thermistor (10K @ 25 oC, β=3435) 11 - Thermal diode. 7.8 Temperature 1 Fault Limit -- Index 53h Power on trapping Bit Name Read/Write Description 7-0 TEMP1_LM Read/Write Temperature sensor 1 Limit Value. VREF R1 FAULT_LIMIT R2 Use two resistors to divide an four section to represent different temperature fault limit value and offset limit value. The table is shown as following. ADCVAL[7]: are represented as Fault Limit Value 12 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 7.9 Reserved --Index 54h~84h 7.10 Temperature 1 OFFSET Register-- Index 85h Power on trapping ADCVAL == FAULT_LIMIT1; ADCVAL == OFFSET1 FAULT_LIMIT Offset Temperature ADC Value R1 85 0000_xxxx X 0 85 22 0001_xxxx 91K 85 24 0010_xxxx 30K 85 26 0011_xxxx 20K 85 28 0100_xxxx 13K 85 30 0101_xxxx 91K 85 32 0110_xxxx 68K 85 34 0111_xxxx 18K 90 0 1000_xxxx 16K 90 22 1001_xxxx 5.1K 90 24 1010_xxxx 4.7K 90 26 1011_xxxx 4.7K 90 28 1100_xxxx 5.1K 90 30 1101_xxxx 3K 90 32 1110_xxxx 9.1K 90 34 1111_xxxx 10K R2 10K 9.1K 5.6K 5.6K 5.1K 4.7K 4.7K 16K 18K 7.5K 9.1K 12K 18K 16K 91K X 8. VALUE RAM AND LIMIT VALUE 8.1 Value RAM  Index 20h- 3Fh Index A7-A0 20-26h 27h 28-3Fh Description Reserved Temperature 1 reading Reserved 13 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 9. SPECIFICATIONS 9.1 Absolute Maximum Ratings PARAMETER Power Supply Voltage Input Voltage Operating Temperature Storage Temperature RATING -0.5 to 7.0 3.3 to 5.5 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 = 3.3~5V, VSS = 0V) PARAMETER SYM . MIN . TYP. MAX. UNIT CONDITIONS I/O12t - TTL level bi-directional pin with source-sink capability of 12 mA Input Low Voltage VIL Input High Voltage VIH 2.0 0.8 0.4 Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage VOL VOH ILIH ILIL 2.4 V V V V µA µA IOL = 12 mA IOH = - 12 mA VIN = VDD VIN = 0V +10 -10 I/O12ts - TTL level bi-directional pin with source-sink capability of 12 mA and schmitt-trigger level input Input Low Threshold Voltage Vt0.5 0.8 1.1 V VDD = 5 V Input High Threshold Voltage Vt+ 1.6 2.0 2.4 V VDD = 5 V Hysteresis VTH 0.5 1.2 V VDD = 5 V Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage VOL VOH ILIH ILIL 2.4 0.4 V V µA µA IOL = 12 mA IOH = - 12 mA VIN = VDD VIN = 0V +10 -10 14 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 9.2 DC Characteristics, continued PARAMETER SY M. VOH MIN. TYP. MAX. 0.4 UNI T V V CONDITIONS OUT12t - TTL level output pin with source-sink capability of 12 mA Output Low Voltage VOL Output High Voltage 2.4 0.4 0.4 0.4 0.8 2.0 +10 -10 0.5 1.6 0.5 0.8 2.0 1.2 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 Output Low Voltage VOL OD12 - Open-drain output pin with sink capability of 12 mA Output Low Voltage VOL OD48 - Open-drain output pin with sink capability of 48 mA Output Low Voltage VOL INt - TTL level input pin Input Low Voltage V V V V V µA µA VIL VIH ILIH ILIL Input High Voltage Input High Leakage Input Low Leakage VIN = VDD VIN = 0 V V V V µA µA INts - TTL level Schmitt-triggered input pin Input Low Threshold Voltage VtInput High Threshold Voltage Vt+ Hysteresis VTH Input High Leakage ILIH 1.1 2.4 +10 -10 VCC = 5 V VCC = 5 V VCC = 5 V VIN = VCC VIN = 0 V Input Low Leakage ILIL 15 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 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 uS nS 1.0 300 16 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 10. HOW TO READ THE TOP MARKING The top marking of W83L785TS-S W83L78 5TS- S 212OA Left: Winbond logo 1st line and 2nd line: Type number W83L785TS-S, S means SOP (Thickness = 150mil). 3rd line: Date code 212 O A 2 12: packages made in 2002, week 12 O: assembly house ID; A means ASE, O means OSE, G means Greatek A: IC revision; A means version A, B means version B 17 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 11. PACKAGE AND DIMENSIONS 8 5 E 1 4 Control demensions are in milmeters . E θ 8L SOP-150mil 18 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary 19 Publication Release Date: April 2002 Revision 0.5 W83L785TS-S Preliminary I2C ADDRESS 0x5CH Ver 0.3 pin6 Temp_fault# change to Temp_fault Ver 0.4 W83L785TR_S change to W83L785TS_S VCC C1 10u/16V C2 0.1u VCC U1 R1 Temp VREF 1 2 3 4 VDD SCL CPUT SDA Vref Temp_fault# OFFSET/Fault_limit GND W83L785TS_S 8 7 6 5 R6 33 R3 4.7K R4 4.7K R5 4.7K R7 33 SCL SDA OFFSET/FAULT_LIMIT Temp_fault R2 TEMPERATURE SENSORING CIRCUIT VREF R8 15K 1% C3 3300P Temp From CPU { D- D+ 0000XXXX 0001XXXX 0010XXXX 0011XXXX 0100XXXX 0101XXXX 0110XXXX 0111XXXX 1000XXXX 1001XXXX 1010XXXX 1011XXXX 1100XXXX 1101XXXX 1110XXXX 1111XXXX TEMP_FAULT OFFSET 0 85 22 85 24 85 85 26 85 28 85 30 32 85 85 34 0 90 22 90 24 90 90 26 90 28 90 30 90 32 34 90 R1 X 91K 30K 20K 13K 91K 68K 18K 16K 5.1K 4.7K 4.7K 5.1K 3K 9.1K 10K R2 10K 9.1K 5.6K 5.6K 5.1K 4.7K 4.7K 16K 18K 7.5K 9.1K 12K 18K 16K 91K X VREF R9 10K 1% THERMISTOR T RT1 10K 1% Temp Title Size B Date: WINBOND ELECTRONICS CORP. W83L785TS_S Application Circuit Document Number W83L785TS.SCH Wednesday, February 27, 2002 Sheet 1 Rev 0.4 of 1 Publication Release Date: April 2002 20 Revision 0.5