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w83l785ts-s winbond h/w monitoring ic
w83l785ts-s prel iminary w83l785ts-s data sheet revision history pages dates versio n version on web main contents 1 n.a. n.a. all the version before 0.50 are for internal use. 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. publication release date: apri l 2002 revision 0.5 2
w83l785ts-s prel iminary table of contents 1 . general description.......................................................................... 5 2. features ................................................................................................... 5 3. key specifications............................................................................... 5 4. pin configuration .............. error! bookmark not defined. 6 5. pin de scription ...................................................................................... 6 6.. functional description................................................................... 7 6.1 general description......................................................... error! bookmark not defined. 6.2 access interface........................................................................................................... ..... 7 6.2.1 the first serial bus access timing are shown as follow:................................................... 7 6.3 analog inputs .............................................................................................................. ..... 8 6.3.1 temperature measurement machine ............................................................................. 8 6.3.2 monitor temperature from thermal diode ....................................................................... 8 6.4 offset and temperature fault limit (fault_limit) setting ................................... 9 6.5 temp_fault# ............................................................................................................ 10 7. content of data regis ters .......................................................... 11 7.1 configuration register ? index 40h ............................................................................. 11 7.2 reserved --index 41h~4bh ............................................................................................. 11 7.3 winbond vendor id (low byte) - index 4ch (auto increase)....................................... 11 7.4 winbond vendor id (high byte) - index 4dh (no auto increase)................................ 11 7.5 chip id -- index 4eh...................................................................................................... 12 7.6 reserved -- index 4fh~51h ............................................................................................ 12 7.7 thermal sensor 1/2 type register -- index 52h............................................................. 12 7.8 temperature 1 fault limit -- index 53h......................................................................... 12 7.9 reserved --index 54h~84h) ............................................................................................ 13 7.10 temperature 1 offset register-- index 85h............................................................... 13 8. value ram and limit value ........................................................... 13 8.1 value ram ? index 20h- 3fh....................................................................................... 13 9. speci fications..................................................................................... 14 9.1 absolute maximum ratings............................................................................................ 14 9.2 dc characteristics......................................................................................................... 14 9.3 ac characteristics ......................................................................................................... 16 10. how to read the top marking................................................... 17 11. package drawin g and dime nsions .......................................... 18 publication release date: apri l 2002 revision 0.5 3
w83l785ts-s prel iminary 12. w83l785tr schemati cs..................................................................... 19 publication release date: apri l 2002 revision 0.5 4
w83l785ts-s prel iminary 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 st ore 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 ? i 2 c tm 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 3 c(max) ? supply voltage 2.7v ~ 5.5v ? operating supply current 2 ma typ. ? adc resolution 8 bits publication release date: apri l 2002 revision 0.5 5
w83l785ts-s prel iminary 4. pin configuration 8 7 6 5 1 2 3 4 scl sda gnd temp_fault# offset/fault_limit vref cput vdd 785ts-s 5. pin description i/o - ttl level bi-directional pin with 12 ma source-sink capability ,open drain output 12t i/o 12ts - ttl level and schmitt trigger out 12 - output pin with 12 ma source-sink capability aout - output pin(analog) od - open-drain output pin with 12 ma sink capability 12 in t - ttl level input pin in ts - ttl level input pin and schmitt trigger ain - input pin(analog) pin name pin no. type description vdd 1 power +3.3 vdd (or 3.3vsb) power supply input. cput 2 ain cpu thermal diode input. vref 3 aout reference voltage. offset/ fault_limit 4 vin this pin can be used to change cput offset value and set up the temperature_fault limit.by adjusting two external serial resistors. gnd 5 ground ground. temp_fault# 6 od 12 active-low output. this pin will be a logic low when cpu temperature exceeds limit. sda 7 i/od 12 serial bus bi-directional data. scl 8 in ts serial bus clock. publication release date: apri l 2002 revision 0.5 6
w83l785ts-s prel iminary 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 i 2 c 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 start by master 01011 1 d7 d6 d5 d4 d3 d2 d1 d0 ack by 785tr r/w ack by 785tr scl sda d7 d6 d5 d4 d3 d2 d1 d0 ack by 785tr stop by master scl sda (continued) 780 78 0 78 frame 2 internal index register byte (continued) frame 3 data byte frame 1 serial bus address byte figure 1. serial bus write to internal address register followed by the data byte 0 publication release date: apri l 2002 revision 0.5 7
w83l785ts-s prel iminary (b) serial bus read form internal address register followed by the data byte 0 repeat start by master 01011 0 1 d7 d6 d5 d4 d3 d2 d1 d0 ack by 785tr r/w ack by 785tr d7 d6 d5 d4 d3 d2 d1 d0 ack by 784r stop by master 780 78 frame 2 internal index register byte frame 4 data byte from 785tr frame 1 serial bus address byte figure 2. serial bus read from internal address register followed by the data byte 01234567801 345 26 7 1 01 1 00 1 r/w 8 nack by master frame 3 serial bus byte ack by 785tr scl sda scl(continued) sda(continued) 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. table 1: the format of the temperature data temperature 8-bit digital output 8-bit binary 8-bit hex +125c 0111,1101 7dh +25 c 0001,1001 19h +2 c 0000,0010 02h +1 c 0000,0001 01h +0 c 0000,0000 00h -1 c 1111,1111 ffh -2 c 1111,1110 feh -25 c 1110,0111 e7h -55 c 1100,1001 c9h publication release date: apri l 2002 revision 0.5 8
w83l785ts-s prel iminary 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 pr otection 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 r=15k, 1% c=3300pf vref cput1 w83l785ts-s d+ d- therminal diode microprocessor 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 85,90 o c. as for the application circuit and corresponding resistors value, please see the figure and table as below. r1 r2 offset vref figure 4: offset setting publication release date: apri l 2002 revision 0.5 9
w83l785ts-s prel iminary 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 fo r 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: 90 o c) in cr26, or cr27, pin6 temp_fault# will be asserted. as figure 5 shows. figure 5. temp_fault# temp_fault limit temp_fault# 90 deg 60 deg publication release date: apri l 2002 revision 0.5 10
w83l785ts-s prel iminary 7. content of data registers 7.1 configuration register ? index 40h power on default [7:0] = 0010,1101 b bit name read/write description 7 initialization read/write 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. 6 reserved read/write reserved 5 reserved read/write reserved 4 soft_pwdn read/write software power down. if setting to 1,this chip will power down, but i2c interface is still working. 3 reserved read/write reserved 2 en _temp _fault read/write 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. 1 int_ clear read/write the device will stop monitoring. it will resume upon clearing of this bit. 0 start read/write a one enables startup of monitored activities, a zero puts the part in standby mode. 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 publication release date: apri l 2002 revision 0.5 11
w83l785ts-s prel iminary 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 reserved read/write reserved. 1-0 t1_type[1:0] read/write temperature sensor 2 (environment) type. 0x - thermistor (10k @ 25 c, =3435) o 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. r1 r2 fault_limit vref 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 publication release date: apri l 2002 revision 0.5 12
w83l785ts-s prel iminary 7.9 reserved --index 54h~84h 7.10 temperature 1 offset register-- index 85h power on trapping adcval<7> == fault_limit1; adcval<6:4> == offset1 fault_limit offset temperature adc value r1 r2 85 0 0000_xxxx x 10k 85 22 0001_xxxx 91k 9.1k 85 24 0010_xxxx 30k 5.6k 85 26 0011_xxxx 20k 5.6k 85 28 0100_xxxx 13k 5.1k 85 30 0101_xxxx 91k 4.7k 85 32 0110_xxxx 68k 4.7k 85 34 0111_xxxx 18k 16k 90 0 1000_xxxx 16k 18k 90 22 1001_xxxx 5.1k 7.5k 90 24 1010_xxxx 4.7k 9.1k 90 26 1011_xxxx 4.7k 12k 90 28 1100_xxxx 5.1k 18k 90 30 1101_xxxx 3k 16k 90 32 1110_xxxx 9.1k 91k 90 34 1111_xxxx 10k x 8. value ram and limit value 8.1 value ram ? index 20h- 3fh index a7-a0 description 20-26h reserved 27h temperature 1 reading 28-3fh reserved publication release date: apri l 2002 revision 0.5 13
w83l785ts-s prel iminary 9. specifications 9.1 absolute maximum ratings parameter rating unit power supply voltage -0.5 to 7.0 v input voltage 3.3 to 5.5 v operating temperature 0 to +70 c storage temperature -55 to +150 c note: exposure to conditions beyond those listed under absolute ma ximum ratings may adversely affect the life and reliability of the device. 9.2 dc characteristics (ta = 0 c to 70 c, v dd = 3.3~5v, v ss = 0v) parameter sym . min . typ. max. unit conditions i/o 12t - ttl level bi-directional pin with source-sink capability of 12 ma input low voltage vil 0.8 v input high voltage vih 2.0 v output low voltage vol 0.4 v i ol = 12 ma output high voltage voh 2.4 v i oh = - 12 ma input high leakage ilih +10 a vin = vdd input low leakage ilil -10 a vin = 0v i/o 12ts - ttl level bi-directional pin with source-sink ca pability of 12 ma and schmitt-trigger level input input low threshold voltage vt- 0.5 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 vol 0.4 v i ol = 12 ma output high voltage voh 2.4 v i oh = - 12 ma input high leakage ilih +10 a vin = vdd input low leakage ilil -10 a vin = 0v publication release date: apri l 2002 revision 0.5 14
w83l785ts-s prel iminary 9.2 dc characteristics, continued parameter sy m. min. typ. max. uni t conditions out 12t - ttl level output pin with source-sink capability of 12 ma output low voltage vol 0.4 v i ol = 12 ma output high voltage voh 2.4 v i oh = -12 ma od 8 - open-drain output pin with sink capability of 8 ma output low voltage vol 0.4 v i ol = 8 ma od 12 - open-drain output pin with sink capability of 12 ma output low voltage vol 0.4 v i ol = 12 ma od 48 - open-drain output pin with sink capability of 48 ma output low voltage vol 0.4 v i ol = 48 ma in t - ttl level input pin input low voltage vil 0.8 v input high voltage vih 2.0 v input high leakage ilih +10 a vin = vdd input low leakage ilil -10 a vin = 0 v in ts - ttl level schmitt-triggered input pin input low threshold voltage vt- 0.5 0.8 1.1 v vcc = 5 v input high threshold voltage vt+ 1.6 2.0 2.4 v vcc = 5 v hysteresis vth 0.5 1.2 v vcc = 5 v input high leakage ilih +10 a vin = vcc input low leakage ilil -10 a vin = 0 v publication release date: apri l 2002 revision 0.5 15
w83l785ts-s prel iminary 9.3 ac characteristics valid data scl sda in sda out t hd;sda t scl t hd;dat t su;sto t su;dat serial bus timing diagram serial bus timing parameter symbol min. max. unit scl clock period t - scl 10 us start condition hold time t hd;sda 4.7 us stop condition setup-up time t su;sto 4.7 us data to scl setup time t su;dat 120 ns data to scl hold time t hd;dat 5 ns scl and sda rise time t r 1.0 us scl and sda fall time t f 300 ns publication release date: apri l 2002 revision 0.5 16
w83l785ts-s prel iminary 10. how to read the top marking the top marking of w83l785ts-s w 83l78 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 publication release date: apri l 2002 revision 0.5 17
w83l785ts-s prel iminary 11. package and dimensions e 1 8 5 4 control demensions are in milmeters . e 8l sop-150mil publication release date: apri l 2002 revision 0.5 18
w83l785ts-s prel iminary publication release date: apri l 2002 revision 0.5 19
prel iminary publication release date: apri l 2002 revision 0.5 20 r1 30 temp_fault 1101xxxx 22 30k 16k 68k 7.5k 24 temp_fault 1000xxxx 85 4.7k 5.1k r8 15k 1% 0101xxxx 1111xxxx ver 0.4 w83l785tr_s change to w83l785ts_s r3 4.7k r4 4.7k c3 3300p temp 90 t rt1 thermistor 10k 1% 0010xxxx 16k d+ 85 34 0 0001xxxx vref 20k 16k 1011xxxx 18k 34 0111xxxx 0 9.1k 0011xxxx 1110xxxx r5 4.7k 85 10k 1100xxxx 4.7k winbond electronics corp. sda 90 10k 1010xxxx 9.1k 9.1k 85 offset 26 vcc temp w83l785ts.sch 0.4 w83l785ts_s application circuit b 11 wednesday, february 27, 2002 title size document number rev date: sheet of 90 13k 5.6k temperature sensoring circuit 24 r1 32 4.7k 12k 91k vref r6 33 90 22 5.1k i2c address 0x5ch u1 w83l785ts_s 1 2 3 4 5 6 7 8 vdd cput vref offset/fault_limit gnd temp_fault# sda scl 5.1k 85 26 { 1001xxxx 90 4.7k c2 0.1u 28 r7 33 32 temp r9 10k 1% offset/fault_limit 0110xxxx 18k 0000xxxx 91k x 90 18k c1 10u/16v 85 85 90 5.6k scl 30 vcc 3k r2 ver 0.3 pin6 temp_fault# change to temp_fault 0100xxxx 90 85 28 91k vref r2 x from cpu d- w83l785ts-s

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