w83l786nr Winbond Electronics Corp America, w83l786nr Datasheet
w83l786nr
Related parts for w83l786nr
w83l786nr Summary of contents
Page 1
... W83L786NR W83L786NG Winbond H/W Monitoring IC ...
Page 2
... Winbond customers using or selling these products for use in such applications their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. W83L786NR/ W83L786NG W83L786NR VERSION ...
Page 3
... Monitor Temperature from Thermal Diode .....................................................................11 7.5.3 Temperature Fault (TEMP_FAULT #) ............................................................................12 7.6 FAN Speed Count and FAN Speed Control .................................................................. 12 7.6.1 Fan Speed Count ...........................................................................................................12 7.6.2 Fan Speed Control .........................................................................................................14 7.6.3 SMART FANTM I Control ...............................................................................................16 7.6.4 SMART FANTM II Control ..............................................................................................17 7.6.5 Fan Fault (FAN_FAULT #) .............................................................................................19 7.7 Fault Signal—INT#......................................................................................................... 19 7.7.1 Temperature...................................................................................................................19 7.7.2 Voltage ...........................................................................................................................21 7.7.3 Fan .................................................................................................................................21 8. CONTROL AND STATUS REGISTER ..................................................................................... 22 W83L786NR/ W83L786NG - II - ...
Page 4
... TM Table (SMART FAN II Mode) - 87h ............................................................................ 32 8.31 FAN2 Output Voltage Table (SMART FANTM II Mode) - Index 88h ............................. 33 8.32 TEMP1 (VTIN1) Target TEMP_POINT1 for FAN2 (SMART FAN W83L786NR/ W83L786NG II Mode) - Index 83h............................................................. Mode) - Index 85h................................... 32 Temperature Register TM II Mode) - Index 89h................................... 33 Publication Release Date: March 31, 2006 ...
Page 5
... Register - Index 95h....................................................................................................... 37 8.45 Register - Index 96h....................................................................................................... 38 8.46 Register - Index 97h....................................................................................................... 38 8.47 Value RAM - Index 20h- 3Fh or 60h - 7Fh..................................................................... 38 9. ELECTRICAL CHARACTERISTICS......................................................................................... 40 9.1 Absolute Maximum Ratings ........................................................................................... 40 9.2 DC Characteristics ......................................................................................................... 40 9.3 AC Characteristics ......................................................................................................... 42 9.3.1 Serial Bus Timing Diagram.............................................................................................42 9.3.2 VID Input Skew...............................................................................................................42 10. THE TOP MARKING................................................................................................................. 43 11. PACKAGE SPECIFICATION .................................................................................................... 44 W83L786NR/ W83L786NG - IV - ...
Page 6
... W83L786NR/NG can monitor analog voltage inputs, 2 fan tachometer inputs, and 2 remote temperature sensors. One of the temperature inputs is connected to CPU/GPU thermal diode sensor, and the other remote temperature sensor could be performed by either thermal diode or thermistor. ...
Page 7
... Warning signal pop-up in application software. 2.3 General Interface: I²C / SMBus control bit I C address selection GPIOs. Winbond hardware monitoring application software (Hardware Doctor Windows 2000 / XP and Windows NT 4.0 / 5.0. 3.3V V operation. CC 2.4 Package 20-pin SSOP (209mil). W83L786NR/ W83L786NG - support ...
Page 8
... W83L786NR/ W83L786NG & ...
Page 9
... PIN CONFIGURATION FAN_FAULT/GPIO1 TEMP_FAULT#/GPIO2 SCL SDA Vcc ADDR/GPO3 FAN_SET/GPO4 FANIN1 FANIN2/GPIO5 VTIN1 W83L786NR/ W83L786NG VOLTAGE_FAULT#/GPIO7 1 20 INT PWM/DC_OUT2/GPIO6 3 18 PWM/DC_OUT1 4 17 GND 16 5 VREF _SEN 14 7 RAM V _SEN 8 13 CORE ...
Page 10
... GPIO1 TEMP_FAULT# 2 GPIO2 SCL 3 SDA 4 Vcc 5 W83L786NR/ W83L786NG PIN ATTRIBUTE Active-Low output. This pin will be a logic LOW when the OD 12 fan1 or fan2 is abnormally stopped. (Default) General purpose I/O function. I/OD 12TS This multi-functional pin is programmable. Active-Low output. This pin will be a logic LOW when the OD temperature of the system or CPU exceeds its limit ...
Page 11
... V _SEN 13 CORE V _SEN 14 RAM VREF 15 W83L786NR/ W83L786NG Determines the SMBus device address. /OUT TS 12 General purpose Output function. This multi-functional pin is programmable. Determines the FAN initial speed. Power on configuration AIN for fan speed at four rotation rate levels at 43%, 62%, 81%, and 100%. ...
Page 12
... PWM / DC OUT2 18 GPIO6 INT# 19 VOLTAGE_FAULT# 20 GPIO7 W83L786NR/ W83L786NG Ground pin for the W83L786NR Fan speed control output. This pin is default DC output OD 12 level. It can be programmed as PWM output. Fan speed control output. This pin is default DC output OD 12 level. It can be programmed as PWM output. ...
Page 13
... If the monitored value exceeds the limit value, the interrupt status will be set to 1 and W83L786NR/NG will issue interrupt signals such as INT# and IRQ if not masked. W83L786NR/NG also provides software and hardware Watch Dog Timer to avoid system hang on ...
Page 14
... The input voltage lower than 2.048V could directly connect to the analog inputs. The inputs voltage higher than 2.048V should be reduced by external resistors meet the input range. This is shown in Figure 3. Positive Inputs Typical Therm ister Connection **The connections same as VTIN1 W83L786NR/ W83L786NG ...
Page 15
... W83L786NR/NG and the second function is to connect this pin to internal serial resistors to monitor the +3.3V voltage. The values of two serial resistors are 20K ohms and 40K ohms so that input voltage to ADC is 1 ...
Page 16
... The W83L786NR/NG can alternate the thermistor to thermal diode interface and the circuit connection is shown as Figure 5. The pin connected to power supply ground (GND) and the pin D+ is connected to pin D+ or VTIN1 in the W83L786NR/NG. The bypass capacitor C=2200pF should be added to filter the high frequency noise. ...
Page 17
... Temperature Fault (TEMP_FAULT #) W83L786NR/NG provides a good protection for temperature fault. Set Pin 2 (TEMP_FAULT#) to monitor temperature. When D+-D- (Pin12, 11), or VTIN1 (Pin10) temperature exceeds temperature fault limit in VR35 or VR37, Pin 2 TEMP_FAULT# will be asserted (Figure 6 ...
Page 18
... FAN Out GND Figure 7-1. Fan with Tach Pull-Up to +12V, or Totern-Pole Output and Register Attenuator +5V Pull-up resister 4.7K Ohms +5V 1K~2.7K FAN Out GND Figure 7-3. Fan with Tach Pull-Up to +5V, or Totern-Pole Output and Register Attenuator W83L786NR/ W83L786NG TIME PER COUNTS REVOLUTION 6.82 ms 153 13.64 ms 153 27.27 ms 153 54.54 ms 153 109.08 ms 153 218 ...
Page 19
... Fan Speed Control The W83L786NR/NG provides two sets for PWM/DC fan speed control. The duty cycle of PWM or the output voltage of DC can be programmed by a 4-bit register. There are four mode to control fan speed which are set by programming CR80 [3:2] and CR [5:4], and default are FAN_SET mode. ...
Page 20
... PWM Clock Input NMOS S 7.6.2.3. DC Mode W83L786NR/NG has a 4-bit DAC, which produces 0 to 3.3 voltages DC output that provides maximum 2 sets for fan speed control. The analog output can be programmed in the CR 81, and CR 87 (manual mode). The expression of output voltage can be represented as follows, OUTPUT ...
Page 21
... F I function this mode, W83L786NR/NG provides the S keep the temperatures of CPU and the system within specific range. At first a wanted temperature and interval must be set (ex. 55 °C ± 3 °C) by BIOS and the fan speed will be lowered as long as the current temperature remains below the setting value. Once the temperature exceeds the high limit (58° ...
Page 22
... Each temperature maps different fan out level, the relationship is shown as follows: Fan Duty Cycle Temp. Tolerance Fan Duty Cycle 100% Fan Duty Cycle Level 3 Fan Duty Cycle Level 2 Fan Duty Cycle Level 1 Non-Stop Duty Cycle Temp. 1 W83L786NR/ W83L786NG Fan Start = 20% Fan Stop = 10% Figure 11-2 Temp.2 Temp.3 Temp ...
Page 23
... Once the monitored temperature hits the lower edge of Temp. Tolerance of Temp.3, the fan speed reduces directly from Fan Duty Cycle Level 3 to Fan Duty Cycle Level 2, and keeps the same speed until the temperature hits the next lower edge of Temp. Tolerance. W83L786NR/ W83L786NG mode ...
Page 24
... Tolerance CR[8Dh] b3:b0 7.6.5 Fan Fault (FAN_FAULT #) W83L786NR/NG provides a good protection for fan speed. Set Pin 1 (FAN_FAULT#) to monitor fan speed. When FANIN1 (Pin8) or FANIN2 (Pin9) exceeds fan count high limit in VR3B or VR3C. Pin1 FAN_FAULT# will be asserted (Figure 13 ...
Page 25
... W83L786NR/ W83L786NG , then reset, if the temperature remains above ...
Page 26
... Status Register. (Figure 15-2) Voltage High limit Voltage Low limit SMI# Figure 15-1. Voltage SMI# Mode W83L786NR/ W83L786NG * * * * *Interrupt Reset when Interrupt Status Registers are read ...
Page 27
... VCC_STS Read Only 1 VRAM_STS Read Only 0 VCORE_STS Read Only W83L786NR/ W83L786NG READ/WRITE A one restores power on default value to all Read/Write registers except the Serial Bus Address register. This bit is itself clear when it is set. Read/Write Reserved Software Power Down. Set power down this ...
Page 28
... NAME READ/WRITE 7-2 Reserved 1 MSK_FAN2_INT 0 MSK_FAN1_INT W83L786NR/ W83L786NG Reserved. A one indicates the fan count limit has been exceeded. This bit is cleared when this register is read. A one indicates the fan count limit has been exceeded. This bit is cleared when this register is read. Reserved A one disables the corresponding interrupt status bit for SMI# interrupt ...
Page 29
... EN_GPIO6 Read/Write 1 EN_GPIO5 Read/Write EN_GPO3 0 Read/Write &4 8.9 Register - Index 48h Reserved W83L786NR/ W83L786NG READ/WRITE Read/write Reserved. READ/WRITE Read/write Reserved Pin 2 Function Select. <0> - Function of Pin 2 is TEMP_FAULT#. <1> - Function of Pin 2 is GPIO2. Pin 1 Function Select. <0> - Function of Pin 1 is FAN_FAULT#. <1> - Function of Pin 1 is GPIO1. ...
Page 30
... GPO4_VAL Read/Write 5 GPO3_VAL Read/Write 4-0 Reserved Read/Write W83L786NR/ W83L786NG DESCRIPTION Reserved. GPIO2 I/O Mode Select. (Only for GPIO function of Pin 2 is enabled.) <0> - GPIO2 is an input port. <1> - GPIO2 is an output port. GPIO1 I/O Mode Select. (Only for GPIO function of Pin 1 is enabled.) <0> - GPIO1 is an input port. ...
Page 31
... GPIO5 Value. Set the output value of GPIO5 pin. Reading this bit will return the value of pin 9. DESCRIPTION Vendor ID Low Byte. Default A3h. DESCRIPTION Vendor ID High Byte. Default 5Ch b DESCRIPTION Winbond Chip ID number. Read this register will return 0x80h for W83L786NR/NG ...
Page 32
... Reserved Read/write 1 GPIO6_OB Read/write 0 GPIO5_OB Read/write W83L786NR/ W83L786NG DESCRIPTION Reserved. Enable GPIO2 as Output Buffer. Set to <1> GPIO2 can drive logical high or logical low. <0> GPIO2 is open-drain. Enable GPIO1 as Output Buffer. Set to <1> GPIO1 can drive logical high or logical low. <0> GPIO1 is open-drain. Enable GPIO7 as Output Buffer. Set to < ...
Page 33
... READ/WRITE 7-2 Reserved Read/Write 1 T1_TYPE Read/Write 0 T0_TYPE Read/Write W83L786NR/ W83L786NG READ/WRITE Read/Write Reserved. Temperature INT Mode Select. <00> - Comparator Interrupt Mode: Temperature temperature) limit causes an interrupt. Reading the Interrupt Status will reset this interrupt. <01> - Two Time Interrupt Mode:(Default) This bit use in temperature sensor 1/2 ...
Page 34
... BIT NAME 7 Reserved 6-4 FAN2_DIV_SEL[2:0] 3 Reserved 2-0 FAN1_DIV_SEL[2:0] 8.22 Reserved - Index 55h ~ 5Fh Reserved W83L786NR/ W83L786NG READ/WRITE Read/write Reserved. FAN2 Divisor Select. <000> - divide by 1; <001> - divide by 2; <010> - divide by 4; Read/Write <011> - divide by 8. <100> - divide by 16. <101> - divide by 32. <110> - divide by 64. ...
Page 35
... For Manual Mode BIT NAME READ/WRITE 7-4 Reserved Read/Write FAN1_DC 3-0 Read/Write [3:0] W83L786NR/ W83L786NG DESCRIPTION FAN2 Control Mode <1> - PWM FAN Control Mode <0> FAN Control Mode FAN1 Control Mode <1> - PWM FAN Control Mode <0> FAN Control Mode FAN2 Control Mode. <00> - Manual Control Mode. (Default) <01> - Thermal Cruise mode. ...
Page 36
... NAME 7-0 TEMP_P1F1[7:0] 8.27 TEMP_POINT2 for FAN1 (SMART FANTM II Mode) - Index 84h Power on default [7:0] = 0000, 0000 b BIT NAME 7-0 TEMP_P2F1[7:0] W83L786NR/ W83L786NG FAN1 Output Level 2 for S FAN1 Output Level 1 for S Read/Write FAN1 Output Level 4 for S Read/Write FAN1 Output Level 3 for Mode) - Index 83h ...
Page 37
... Voltage Table (S MART Power on default [7:0] 1111, 1111 b For Manual Mode BIT NAME READ/WRITE 7-4 Reserved Read/Write 3-0 FAN2_DC [3:0] Read/Write W83L786NR/ W83L786NG Mode) - Index 85h MART AN Reserved. Low Limit Speed of FAN1. Only for Thermal Cruise mode. READ/WRITE TEMP_POINT3 for FAN1 use S Read/Write Mode. ...
Page 38
... MART BIT NAME 7-0 TEMP_P1F2[7:0] 8.33 TEMP_POINT2 for FAN2 (SMART FANTM II Mode) - Index 8Ah Power on - [7:0] = 0000, 0000 b BIT NAME 7-0 TEMP_P2F2[7:0] W83L786NR/ W83L786NG Read/Write FAN2 Output Level 2 for S Read/Write FAN2 Output Level 1 for S Read/Write FAN2 Output Level 4 for S Read/Write FAN2 Output Level 3 for ...
Page 39
... For Thermal Cruise mode BIT NAME 7-4 TOL_T1[3:0] 3-0 TOL_T0[3:0] For Smart FAN II Mode BIT NAME 7-4 TOL_T1[3:0] 3-0 TOL_T0[3:0] W83L786NR/ W83L786NG Reserved. Low Limit Speed of FAN2. Only for Thermal Cruise mode Mode. AN READ/WRITE TEMP_POINT3 for FAN2 use S Read/Write Mode. READ/WRITE TEMP_POINT4 for FAN2 use S Read/Write Mode ...
Page 40
... BIT NAME 7 PWM2_CLK_SEL PWM2_CLK_DIV 6-4 [2:0] 3 PWM1_CLK_SEL PWM1_CLK_DIV 2-0 [2:0] W83L786NR/ W83L786NG READ/WRITE PWM Input Clock Select of Fan 2. This bit select FAN input clock to pre-scale divider. Read/Write <0> - 1.44MHz <1> - 180KHz FAN 2 PWM Input Clock divider. <000> - divider is 1 <001> - divider is 2 <010> - divider is 4 Read/Write <011> - divider is 8 < ...
Page 41
... NAME 7-0 STEP_DOWN_T[7:0] 8.41 Fan Step up Time Register - Index 92h Power on default [7:0] = 0000, 1010 b BIT NAME READ/WRITE 7-0 STEP_UP_T[7:0] W83L786NR/ W83L786NG A one indicates FAN is working at 3D mode (for Mode can be programmed directly by I Reserved. FAN Initial Speed. VDD Use two resistors to divide a four section to represent different initial FAN Speed ...
Page 42
... Read/Write 8.44 Register - Index 95h Power-on default [7:0] = 0000, 0000 b BIT NAME READ/WRITE 7-0 Reserved Read/Write W83L786NR/ W83L786NG DESCRIPTION Temperature 0 base temperature. The real temperature is sum of both monitor value and offset value. 0111,1111 => +127/4 degree C 0111,1110 => +126/4 degree C : 0000,0001 => +1/4 degree C 0000,0000 => +0 degree C 1111,1111 => -1/4 degree C 1111,1110 => ...
Page 43
... Reserved 2Bh VCORE High Limit. (0xff) 2Ch VCORE Low Limit. (0x00) 2Dh VRAM High Limit. (0xff) 2Eh VRAM Low Limit. (0x00) 2Fh VCC High Limit. (0xff) W83L786NR/ W83L786NG READ/WRITE Read/Write READ/WRITE Read/Write DESCRIPTION - 38 - DESCRIPTION DESCRIPTION UNIT °C °C Count ...
Page 44
... Note the number of counts of the internal clock for the Low Limit of the fan speed. 3Dh FAN1 Speed Control Output Level 3Eh FAN2 Speed Control Output Level 3Fh Reserved W83L786NR/ W83L786NG DESCRIPTION Publication Release Date: March 31, 2006 - 39 - UNIT °C °C °C ° ...
Page 45
... TTL level bi-directional pin with source-sink capability and schmitt-trigger 12ts level input Input Low Threshold Voltage Input High Threshold Voltage Hysteresis Output Low Voltage Output High Voltage Input High Leakage Input Low Leakage W83L786NR/ W83L786NG RATING -0.5 to 7 +70 -55 to +150 = 0V) SS SYM. MIN. ...
Page 46
... Input Low Leakage I LIL IN - TTL level Schmitt-triggered input pin ts Input Low V t- Threshold Voltage Input High V t+ Threshold Voltage Hysteresis V TH Input High Leakage I LIH Input Low Leakage I LIL W83L786NR/ W83L786NG 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 μA +10 -10 μA ...
Page 47
... SCL and SDA rise time SCL and SDA fall time 9.3.2 VID Input Skew VIDA[5:0]/VIDB[5:0] VID Input Timing PARAMETER VID Input Unstable Time VID Valid Input Hold Time W83L786NR/ W83L786NG t SCL SU;DAT VALID DATA t HD;DAT Serial Bus Timing Diagram SYMBOL MIN ...
Page 48
... The top marking of W83L786NR W83L786NR 2826978Y-61 443OB Left: Winbond logo 1st line: part number: W83L786NR 2nd line: Tracking code 2 826978Y-61 3rd line: Tracking code 443 O B 443: packages made in '04, week 43 O: assembly house ID; A means ASE, S means SPIL, O means OSE ...
Page 49
... PACKAGE SPECIFICATION 20L SSOP-209 mil SEATING PLANE Y e SYMBOL θ W83L786NR/ W83L786NG DIMENSION IN MM DIMENSION IN INCH MIN. NOM MAX. MIN. NOM 2.00 0.05 0.002 0.065 0.069 1.65 1.75 1.85 0.22 0.38 0.009 0.09 0.25 0.004 6.90 7.20 7.50 0.272 0.283 5.00 5.30 5.60 0.197 0.209 7 ...
Page 50
... Winbond customers using or selling these products for use in such applications their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. W83L786NR/ W83L786NG Important Notice Publication Release Date: March 31, 2006 - 45 - ...