w83l784r

Manufacturer Part Numberw83l784r
DescriptionWinbond H/w Monitoring Ic
ManufacturerWinbond Electronics Corp America
w83l784r datasheet
 


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W83L784R
Winbond H/W
Monitoring IC

w83l784r Summary of contents

  • Page 1

    ... W83L784R Winbond H/W Monitoring IC ...

  • Page 2

    ... Main Contents on Web n.a. All the version before 0.50 are for internal use. n.a. First publication. n.a. Schematics updated n.a. Corrected the length (D) from 10.2mm to 7.2mm in the package outline table. n.a. Updated V0.5 schematics adding pull-high resistors for RESET# (pin15 W83L784R Preliminary Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 3

    ... RAM.......................................................................................................................27 7 ONFIGURATION EGISTER 7 NTERRUPT TATUS EGISTER Confidential, For Beta-site Only ...........................................................................................................10 follow:.................................................................10 ......................................................................................................15 ...........................................................................................................16 M ..............................................................................................17 ACHINE thermistor:..........................................................................................17 TM thermal diode or bipolar transistor 2N3904 C .....................................................................................20 PEED ONTROL I 40 ..............................................................................................27 NDEX ........................................................................................27 NDEX W83L784R Preliminary ........................11 ...................18 Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 4

    ... I 8E ......................................................................................43 NDEX H 8F ............................................................................................44 NDEX HERMAL IODE FFSET EGISTER FFSET EGISTER NDEX FFSET EGISTER NDEX W83L784R Preliminary ) EGISTER DDRESS H R --I 4B .........31 DDRESS EGISTER NDEX H ......................................................32 )................................................ ............................34 NDXE ......................41 EGISTER NDEX ...

  • Page 5

    ... EGISTER NDEX ................................................................48 EGISTER NDEX TEMPERATURE EGISTER NDEX H REGISTERS.................................................................... ............................................................49 EGISTER NDEX .........................................................49 EGISTER NDEX ................................................................49 EGISTER NDEX TEMPERATURE EGISTER NDEX H .............................................................................................................50 MARKING..........................................................................................53 .................................................................................. W83L784R Preliminary ...................................................48 ...................................................49 Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 6

    ... Battery low which could issue the hardware warning signals when the fan speed or battery voltage drop out of the preset range. Also the W83L784R provides: power good reset for 3V and 5V; power down mode for power saving; fault pin for necessary H/W shutdown control ...

  • Page 7

    ... ADM (DMI driver 2.0) support Winbond hardware monitoring application software (Hardware Doctor Windows 95/98 Meet WfM 2.0 (Wired for Management) spec. 5V Vcc operation 2.5 Package 20-pin SSOP (209mil) Confidential, For Beta-site Only TM ) support, for both Publication Release Date: Sep W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 8

    ... SDA Confidential, For Beta-site Only 1% (Max) 3 C(Max typ typ. 8 Bits 20 VCC CPUT1/PII1 3 18 CPUT2/PII2 4 VREF 17 5 VIN1 16 6 RESET VIN2(+3.3VIN VIN3(VBAT) SCL 9 12 GND 10 11 BATFAULT#/GPO4 -7 - W83L784R Preliminary Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 9

    ... Serial Bus bi-directional Data. 12 Active-Low output. This pin will be a logic LOW when Battery 1 2 abnormally drops below the low limit or above the high limit. (Default) / General purpose output . This multi-functional pin is programmable. Ground W83L784R Preliminary DESCRIPTION Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 10

    ... Thermistor terminal input.(Default Pentium II diode input. This multi-functional pin is programmable. AIN Thermistor terminal input.(Default Pentium II diode input. This multi-functional pin is programmable. +5VCC power supply input W83L784R Preliminary DESCRIPTION RESET# remains LOW while the Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 11

    ... FUNCTIONAL DESCRIPTION 6.1 General Description The W83L784R provides at most 4 analog positive inputs, 2 fan speed monitors, 2 sets for fan PWM (Pulse Width Modulation) Smart Fan Control , 2 remote thermal inputs from remote thermistors or 2N3904 transistors or Pentium thermal detection. W83L784R also provides the power good (reset) output for 3V and 5V power detection and two fault output pins issuing hardware warning if battery and fans become abnormal ...

  • Page 12

    ... Frame 2 by 784R Internal Index Register Byte ... ... 1 R Ack Ack by Frame 2 by Master 784R MSB Data Byte -11 - W83L784R Preliminary Ack Stop by by Master 784R Ack Stop by by Master Master ) HYST 0 7 ...

  • Page 13

    ... A0 R Ack Frame 4 by 784R MSB Data Byte R Ack Frame 2 by 782D Data Byte -12 - W83L784R Preliminary , HYST Ack by 784R ... ... Ack No Ack Stop by Frame Master Master Master ...

  • Page 14

    ... MSB Data Byte R Ack by 784R Pointer Byte Frame 3 Configuration Data Byte Figure 8. Configuration Register Write -13 - W83L784R Preliminary ... ... Ack Frame 2 by 784R Pointer Byte Ack Stop by ...

  • Page 15

    ... Ack Frame 2 by 784R Pointer Byte Ack Frame 4 by 784R LSB Data Byte -14 - W83L784R Preliminary Ack by 784R Ack Stop by by 784R Master Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 16

    ... ADC. The pin 24 is connected to the power supply VCC with +5V. There are two functions in this pin with 5V. The first function is to supply internal analog power in the W83L784R and the second function is that this voltage with 5V is connected to internal serial resistors to monitor the +5V voltage ...

  • Page 17

    ... VCC is set to 5V and VCC(5V) both exceed the reset threshold, RESET V RST VCC 5 V RST RESET 0 Figure 11 -16 - W83L784R Preliminary V 1V. The time of voltage over 4V is less than tRST tRST Publication Release Date: Sep. 1999 Revision 0.54 RS ...

  • Page 18

    ... Battery Fault Alarm W83L784R provides a good protection for DC battery. Set VIN3 to monitor DC battery voltage and enable VBAT fault function. When VIN3(pin13) voltage exceeds high or low limit value, pin BATFAULT# will be asserted. 6.4 Temperature Measurement Machine The temperature data format is 8-bit two?-complement for internal sensor and 9-bit two -complement for sensor CPUT1 and CPUT2 ...

  • Page 19

    ... The W83L784R can alternate the thermistor to Pentium II transistor 2N3904 and the circuit connection is shown as Figure 12. The pin of Pentium II connected to power supply ground (GND) and the pin D+ is connected to pin PIIx in the W83L784R. The resistor R=30K 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 ...

  • Page 20

    ... OVT# activated indefinitely until reset by HYST , the OVT# will not be activated again.( HYST To T HYST OVT# OVT *Interrupt Reset when CPUT1/CPUT2 is read Figure 14. -19 - W83L784R Preliminary , then OVT# asserted, and Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 21

    ... Time per Counts Revolution 6.82 ms 153 153 13.64 ms 27.27 ms 153 54.54 ms 153 153 109.08 ms 153 218.16 ms 153 436.32 ms 153 872.64 ms Table 2. -20 - W83L784R Preliminary 70% RPM Time for 70% 6160 9.74 ms 3080 19.48 ms 1540 38.96 ms 770 77.92 ms 385 155.84 ms 192 311. 623. 1246.72 ms Publication Release Date: Sep. 1999 ...

  • Page 22

    ... Zener Clamp 6.5.2 Fan speed control The W83L784R 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 Bank0 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 ...

  • Page 23

    ... Smart Fan Control provides two mechanisms. One is Thermal Cruise mode and the other is Fan Speed Cruise mode. 6.5.3.1 Thermal Cruise mode At this mode, W83L784R provides the Smart Fan system which can control the fan speed automatically depend on current temperature to keep it with in a specific range. At first a wanted temperature and interval must be set (ex remains below the setting value, the fan will be off ...

  • Page 24

    ... Cycle 0 6.5.3.2 Fan Speed Cruise mode At this mode, W83L784R provides the Smart Fan system which can control the fan speed automatically depend on current fan spesed to keep it with in a specific range. A wanted fan speed count and interval must be set (ex. 160 range, PWM duty will keep the current value. If current fan speed count is higher than the high limit (ex ...

  • Page 25

    ... Of cource, Smart Fan control system can be disabled and the fan speed control algorithem can be progrmmed by BIOS or application software. 6.5.4 Fan Fault Alarm W83L784R can monitor fan speed by detecting fan speed counter value. When fan speed count is higher than high limit count value(CR58h less than low limit count value(CR59h), pin FANFAULT# is asserted. ...

  • Page 26

    ... Confidential, For Beta-site Only causes an interrupt and then temperature going below HYST SMI *Interrupt Reset when Interrupt Status Registers are read * -25 - W83L784R Preliminary will not HYST , then going below O . (Figure 19 Figure 19-2. Two-Times Interrupt Mode Publication Release Date: Sep. 1999 Revision 0 ...

  • Page 27

    ... Status Register. (Figure 20-2 ) High limit Low limit SMI# * Figure 20-1. Voltage SMI# Mode Confidential, For Beta-site Only Fan Count limit SMI *Interrupt Reset when Interrupt Status Registers are read -26 - W83L784R Preliminary * * Figure 20-2. Fan SMI# Mode Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 28

    ... CPUT2 sensor. A one indicates a High or Low limit has been exceeded from CPUT1 sensor. A one indicates a High or Low limit has been exceeded from W83L784R internal temperature sensor. Reserved A one indicates a High or Low limit has been exceeded. ( VCC, +5V) A one indicates a High or Low limit has been exceeded. ...

  • Page 29

    ... A one disables the corresponding interrupt status bit for interrupt. (internal thermal diode) Reserved A one disables the corresponding interrupt status bit for interrupt. (VCC, +5V) A one disables the corresponding interrupt status bit for interrupt. (Pin VIN2) -28 - W83L784R Preliminary SMI SMI SMI SMI SMI Publication Release Date: Sep. ...

  • Page 30

    ... Set 1, the voltage of temperature sensor is over the limit value. Set 0, the voltage of temperature sensor is in the limit range. Reserved. +5V Voltage Status. Set 1, the voltage of +5V is over the limit value. Set 0, the voltage of + the limit range. -29 - W83L784R Preliminary SMI SMI SMI SMI SMI SMI Description Publication Release Date: Sep ...

  • Page 31

    ... 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. Index 49h Reserved. -30 - W83L784R Preliminary Description Set 1, when CPUT2 target Description Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 32

    ... Description Serial Bus address [6:0]. Description Disable CPUT2 Temperature Function. Set to 1, disable temperature 3 sensor and can not access any Publication Release Date: Sep. -31 - W83L784R Preliminary ¾ 1999 Revision 0.54 ...

  • Page 33

    ... Read/Write Vendor ID Low Byte. Default A3h. Read/Write Vendor ID High Byte. Default 5Ch Winbond Chip ID number. Read this register will return 50h for W83L784R. Reserved. ACPI Temperature Increment Register. If set to this register to non-zero value, the OVT# signal will be -32 - W83L784R Preliminary ...

  • Page 34

    ... OVT#. The pin OVT# is wire OR with OVT1 and OVT3. Enable internal temperature sensor over-temperature (OVT) output if set to 1. Default 0, disable OVT1 output through pin OVT#. The pin OVT# is wire OR with OVT2 Publication Release Date: Sep. -33 - W83L784R Preliminary causes the OVT# output . HYST causes the OVT# O ...

  • Page 35

    ... T O will not occur again until the temperature exceeding T Enable SMI# Output. A one enables the SMI# Interrupt output. SMI# Polarity. Write 1, SMI# active high. Write 0, SMI# active low. Default 0. Publication Release Date: Sep. -34 - W83L784R Preliminary (Over-temperature HYST , and interrupt HYST ...

  • Page 36

    ... FANIN1/GPO1, GPO1 function. Set to 0 (default), pin 1 (FANIN1/GPO1) acts as FANIN1 whcih is fan clock input. Set to 1, this pin 1 acts as GPO1 control function and the output value of GPO1 is programmed by this register bit 1. This output pin GPO2 can connect to Publication Release Date: Sep. -35 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 37

    ... Swap CPUT2 PWM to internal temperature sensor PWM Control. Write this bit set to 1, FAN2 PWM PWM control will refer to internal temperature senesor. Reserved Write 1, enable battery voltage monitor. Write 0, disable battery voltage monitor. (VIN4/VBAT) Publication Release Date: Sep. -36 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 38

    ... Index 5A and 5B), the Pin 11 (BATFAULT#) will be asserted. Description Fan High Count Limit Value. Description Fan Low Count Limit Value. Description Fan High Count Limit Value. Publication Release Date: Sep. -37 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 39

    ... Fan 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 1 01h : divider is 2 02h : divider Publication Release Date: Sep. -38 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 40

    ... Fan 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 Publication Release Date: Sep. -39 - W83L784R Preliminary High percentage is 1999 Revision 0.54 ...

  • Page 41

    ... Manual PWM Control Mode. (Default Thermal Cruise mode Fan Speed Cruise Mode Reserved. Enable Fan 2 as Output Buffer. Set to 1, FANPWM1 can drive logical high or logical low. Default Pin 4 (FANPWM) is open-drain. Publication Release Date: Sep. -40 - W83L784R Preliminary High percentage is 1999 Revision 0.54 ...

  • Page 42

    ... Cruise Mode while CR84h bit3-2 is 10. Description Reserved. CPUT1 Target Temperature. Only for Thermal Cruise Mode while CR84h bit5-4 is 01. Description Fan 1 Target Speed Control. Only for Fan Speed Cruise Mode while CR84h bit5-4 is 10. Publication Release Date: Sep. -41 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 43

    ... This register should be written a non-zero minimum PWM stop duty cycle. Bank 0 ) Description In Thermal Cruise mode, PWM duty will decreases to under this register value. This register should be written a non-zero minimum PWM stop duty cycle. Publication Release Date: Sep. -42 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 44

    ... Description In Thermal Cruise mode, this register determines the time of which PWM duty is from stop duty cycle to 0 duty cycle. The unit of this register is 0.1 second. The default value is 6 seconds. Publication Release Date: Sep. -43 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 45

    ... Temperature 1 base temperature. This value is added to monitor value, resulting in the current temperature. 01,1111 => +31 degree C 01,1110 => +30 degree C : 00,0001 => +1 degree C 00,0000 => +0 degree C 11,1111 => -1 degree C 11,1110 => -2 degree C : 10,0000 => -32 degree Read/Write -44 - W83L784R Preliminary Description Description Description Description Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 46

    ... Temperature 3 (CPU T2) base temperature. This value is added to monitor value, resulting in the current temperature. 01,1111 => +31 degree C 01,1110 => +30 degree C : 00,0001 => +1 degree C 00,0000 => +0 degree C 11,1111 => -1 degree C 11,1110 => -2 degree C : 10,0000 => -32 degree -45 - W83L784R Preliminary Description Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 47

    ... Note: This location stores the number of counts of the internal clock per revolution. Reserved VIN1(Vcore) High Limit VIN1(Vcore) Low Limit VIN3 (VBAT) High Limit VIN3 (VBAT) Low Limit VIN2 (+3.3V) High Limit VIN2 (+3.3V) Low Limit Publication Release Date: Sep. -46 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 48

    ... VCC High Limit VCC Low Limit Reserved Reserved Reserved Reserved Reserved Reserved Over Temperature Limit (High) of internal temperature Temperature Hysteresis Limit (Low) of internal temperature FAN1 Fan Count Limit FAN2 Fan Count Limit. Reserved Reserved Publication Release Date: Sep. -47 - W83L784R Preliminary 1999 Revision 0.54 ...

  • Page 49

    ... Number of faults to detect before setting OVT# output to avoid false tripping due to noise. Reserved. Reserved. Read/Write Temperature hysteresis bit 8-0. The temperature default 75.0 degree C. Read 0. Read/Write Over-temperature bit 8-0. The temperature default 80.0 degree C. Read 0. -48 - W83L784R Preliminary Description Description Description Description Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 50

    ... Number of faults to detect before setting OVT# output to avoid false tripping due to noise. Read 0. Reserved Read/Write Temperature hysteresis bit 8-0. The temperature default 75.0 degree C. Read 0. Read/Write Over-temperature bit 8-0. The temperature default 80.0 degree C. Read 0. -49 - W83L784R Preliminary Description Description Description Description Publication Release Date: Sep. 1999 Revision 0.54 ...

  • Page 51

    ... +10 LIH I -10 LIL V 0.5 0.8 1 1.6 2.0 2 0 +10 LIH I -10 LIL -50 - W83L784R Preliminary UNIT UNIT CONDITIONS ...

  • Page 52

    ... MIN. TYP. MAX. UNIT 0.4 V 2.4 V 0.4 V 0.4 V 0.4 V 0.8 V 2.0 V +10 -10 V 0.5 0.8 1 1.6 2.0 2 0.5 1 +10 LIH I -10 LIL -51 - W83L784R Preliminary CONDITIONS - ...

  • Page 53

    ... SCL and SDA fall time Confidential, For Beta-site Only t SCL t HD;DAT VALID DATA t SU;DAT Serial Bus Timing Diagram SYMBOL MIN SCL t 4.7 HD;SDA t 4.7 SU;STO t 120 SU;DAT t 5 HD;DAT Publication Release Date: Sep. -52 - W83L784R Preliminary t SU;STO MAX. UNIT 1.0 uS 300 nS 1999 Revision 0.54 ...

  • Page 54

    ... The top marking of W83L784R W83L784R 2826978Y-61 814OB Left: Winbond logo 1st line: Winbond logo and the type number: W83L784R 2nd line: Tracking code 2 826978Y-61 2: wafers manufactured in Winbond FAB 2 826978Y-61: wafer production series lot number 3rd line: Tracking code 814 O B 814: packages made in '98, week 14 O: assembly house ID ...

  • Page 55

    ... SEATING PLANE q L DETAIL A L1 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 -54 - W83L784R Preliminary DIMENSION IN INCH NOM MAX. MIN. NOM MAX. 0.079 2.00 0.002 1.75 1.85 0.065 0.069 0.073 ...

  • Page 56

    ... Rev. 0.1: Ignore. 0.2: W83L784R application circuit. 0.3: Change Pin5,Pin6,Pin11 to LOW Active. Change Pin7 pull-up to 3VSB. 0.4: D1,D2,R9,R15 can be removed. Change Ohm. Add R27,R28,R29,R30(Reserved). (Refer Application Notice 1) 0.5: Add a pull-up resistor R31. VCC 3VCC 3VSB R27 ...