f75387 Feature Integration Technology Inc., f75387 Datasheet
f75387
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... F75387SG/RG Datasheet o ±1 C Accuracy H/W Monitor IC with Automatic Fan Speed Control Release Date: July, 2007 Revision: V0.27P F75387 ...
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... F75387 Datasheet Revision History Version Date Page 0.20P Mar/2005 0.21P Mar/2005 41-42 0.22P Apr/2005 37~40 0.23P May/2005 48 0.24P Jun/2005 41,42 0.25P Dec/2005 0.26P Dec/2006 0.27P July/2007 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 ...
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... OLTAGE F .............................................................................................................................................................................................16 AN 6.14. VOLT_FAULT# (V OLTAGE 7. PCB LAYOUT GUIDE................................................................................................................................................................17 8. REGISTER DESCRIPTION ......................................................................................................................................................18 8. ONFIGURATION EGISTER .............................................................................................................6 AN PEED ONTROL .........................................................................................................................................6 .................................................................................................................................................. ...................................................................................................8 OWER N ONFIGURATION ...........................................................................................................................9 ...........................................................................................................................................9 M ....................................................................................................................10 ACHINE ...............................................................................................................10 .........................................................................................................11 (OVT#)..........................................................................................................................11 C ......................................................................................................................12 ONTROL ...............................................................................................................................................13 ........................................................................................................................... ).................................................................................................................17 AULT IGNAL ....................................................................................................................18 NDEX H 1 F75387 July, 2007 0.27P ...
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... I 71 ....................................................................................................30 EGISTER NDEX ..............................................................................................................31 NDEX ..............................................................................................................31 NDEX H 76 ............................................................................................................................... .................................................................................................31 EGISTER NDEX H 1 ....................................................................................................31 EGISTER NDEX ..............................................................................................................32 NDEX ..............................................................................................................32 NDEX H 86 ...............................................................................................................................32 H – ......................................................................................................32 EGISTER NDEX H 2 ............................................................................... ..................................................26 NDEX H F75387 July, 2007 0.27P ...
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... FAN2 SEGMENT 5 SPEED COUNT – ELECTRICAL CHARACTERISTIC........................................................................................................................................39 9. BSOLUTE AXIMUM 9. .................................................................................................................................................39 HARACTERISTICS 9. .................................................................................................................................................40 HARACTERISTICS 10. ORDERING INFORMATION ................................................................................................................................................41 11. PACKAGE DIMENSIONS......................................................................................................................................................41 12. F75387 APPLICATION CIRCUIT .........................................................................................................................................43 13. F75387 APPLICATION CIRCUIT & CO-LAYOUT CIRCUIT WITH F75375 ................................................................45 – .............................................................................................................33 EGISTER NDEX H R – ...........................................................................................................33 EGISTER NDEX H A0 ..................................................................................................33 NDEX H A1 ...
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... An 11-bit analog-to-digital converter (ADC) was built inside F75387. The chip can monitor analog voltage inputs, 2 fan tachometer inputs and 3 temperature inputs (2 remote and 1 local sensor) ...
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... TTL level input pin and schmitt trigger, 5V tolerance. ts5V AIN - Input pin(Analog Power. 3. 145 ±1 C from + +100 o o ±3 C from + +100 16 FANIN1 SCLK 7 10 SDATA F75387 VCC D1+ D2+ VREF VIN1 VIN2 VIN3 GND July, 2007 0.27P ...
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... System management interrupt (Pure open drain). This pin will be active low when there is something wrong with voltage, temperature and fan. See register description index 33h Active-Low output. This pin will be a logic LOW when the voltage exceeds its limit. 6 F75387 July, 2007 0.27P ...
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... F75387. Therefore 3Vcc can directly connect to this chip’s power pin and need no external resistors. There are two functions in this pin with 3.3V. The first function is to supply internal analog power of the F75387 and the second function is that this voltage with 3.3V is connected to internal serial resistors to monitor the +3.3V voltage. The internal serial resistors are two 150K ohm, so that the internal reduced voltage is half of +3 ...
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... There are four voltage inputs in the F75387 and the voltage divided formula is shown as follows: VIN If we choose R1=27K, R2=5.1K, the exact input voltage for As for application circuit, it can be refer to the figure as follows. 3Vcc VIN (Lower than 2.048V) Voltage Inputs VIN(Higher than Typical BJT ...
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... Serial Bus read from Internal Address Register followed by the Data Byte 6.4. Typical operating characteristic 1.5 1 0 6.5. Temperature monitoring The F75387 monitors a local and a remote temperature sensor. Both can be measured from 0°C to 140.875°C. The temperature format is as the following table R Ack ...
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... Monitor Temperature from thermistor The F75387 can connect two thermistors to measure environment temperature or remote temperature. The specification of thermistor should be considered to (1) β value is 3435K (2) resistor value is 10K ohm at 25°C. In the Figure 6-1, the thermistor is connected by a serial resistor with 10K ohm, then connected to VREF (pin13). ...
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... Monitor Temperature from thermal diode Also, if the CPU, GPU or external circuits provide thermal diode for temperature measurement, the F75387 is capable to these situations. The build-in reference table is for PNP 2N3906 transistor, and each different kind of thermal diode should be matched with specific and BJT gain. In the Figure 6-1, the transistor is directly connected into temperature pins ...
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... Fan with Tach Pull-Up to +5V, or Totem-Pole Putput and Zener Clamp 1 × Count RPM 1 × RPM Count 12 F75387 Pull-up resister < totem-pole output > 1K Fan Input FANIN 1 3.3V Zener F75387S Pull-up resister < totem-pole output > 1K Fan Input FANIN1 3.3V Zener F75387S July, 2007 0.27P ...
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... The F75387 provides 2 fan speed control methods: Linear Fan Control The range of DC output is 0~3.3V, controlled by 8-bit register (CR75 for FAN1 and CR85 for FAN2). 1 LSB is about 0.013V. The output DC voltage is amplified by external OP circuit, thus to reach maximum FAN OPERATION VOLTAGE, 12V. The output voltage will be given as followed: ...
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... Speed mode is an intelligent method according to expected fan speed pre-setting by BIOS. In the beginning, fan speed will operate at full speed and the F75387 will get the full speed count value. After that, the fan speed will automatically rotate according to the expected fan speed setting by BIOS. The register CR74h and CR75h are used for this mode ...
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... When PWMOUT duty-cycle decrease to MIN_DUTY(≠ 00h), obviously the duty-cycle will decrease to 00h next, the F75387 will keep duty-cycle at 00h for 1.6 seconds. After that, the F75387 starts to compare current fan count and expected count in order to increase or decrease its duty-cycle. This ensures that if there is any glitch during the period, the F75387 will ignore it ...
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... SMI# can be used to replace the FAN_FAULT# function . (pulse mode) (level mode) *Interrupt Reset when Interrupt Status Registers are written HYST * * * * *Interrupt Reset when Interrupt Status Registers are written 1 Figure 6 *Interrupt Reset when Interrupt Status Registers are written * * * * * * * Figure 6-5 :Voltage SMI# Mode 16 F75387 * * * July, 2007 0.27P ...
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... The following guideline should be taken to reduce the measurement error of the temperature sensors: 1. Place the F75387 as close as practical to the remote sensing diode. In noisy environments, such as a computer main-board, the distance can inches. (typ). This length can be increased if the worst noise sources are avoided ...
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... Adding a few thermocouples causes a negligible error. 5. Place a 0.1µF bypass capacitor close to the V filter capacitors across D+, Pin9 GND(D-) close to the F75387 the distance to the remote sensor is more than 8 inches, the use of twisted pair cable is recommended. It will work up to around feet ...
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... The PIN2 will act as GPIO0.(default) 1: The PIN2 will act as FANIN2 input. 00: pin5 function is GPIO2.(default) 01: pin5 is used as SMI 10: pin5 is used as Fan fault function 11: LED out(1Hz/0.5Hz select by LED_FREQ register) 0: SMI will be level mode.(default) 1: SMI will be pulse mode. 19 F75387 Description July, 2007 0.27P ...
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... The voltage fault is low active.(default) 1: The voltage fault is high active. Voltage fault queue used to filter the voltage noise, the follow define the times of the event when VOLT_FAULT# is asserted. 00: 1 times 01: 3 times 10: 5 times 11: 7 times 20 F75387 July, 2007 0.27P ...
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... C.At the moment of reading this register, the LSB will be latched. This will prevent from ADC update the data when reading. To read the temperature value correctly, read MSB first and followed read the LSB. 21 F75387 º C.At the moment of º the moment of º ...
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... A one enables the corresponding interrupt status bit for SMI# interrupt. A one enables the corresponding interrupt status bit for SMI# interrupt. A one enables the corresponding interrupt status bit for SMI# interrupt. A one enables the corresponding interrupt status bit for SMI# interrupt. 22 F75387 º C º C. ...
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... A one indicates VT2 temperature sensor is out of the range set by the register 6Ch and 6Dh continuously for the times set by the OVT_QUEUE register. A one indicates VT1 temperature sensor is out of the range set by the register 6Ah and 6Bh continuously for the times set by the OVT_QUEUE register. 23 F75387 July, 2007 0.27P ...
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... Write 1 to clear this bit, write 0 will be ignored. A one indicates VIN3 has exceeded the high or low limit continuously for R/W the times set by V_FAULT_QUEUE register. Write 1 to clear this bit, write 0 will be ignored. 24 F75387 Description Description July, 2007 0.27P ...
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... V_FAULT_QUEUE. Set 1 when the VCC exceeds the high or low limit continuously for the times set by the V_FAULT_QUEUE, set 0 when the VCC resides in the safe region continuously for the times set by the V_FAULT_QUEUE. 25 F75387 July, 2007 0.27P ...
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... Enable voltage fault mechanism of VIN3. Enable voltage fault mechanism of VIN2. Enable voltage fault mechanism of VIN1. Enable voltage fault mechanism of VCC. RO Chip ID, High byte (8’h04). RO Chip ID, Low byte (8’h10). RO Vendor ID, high byte (8’h19) RO Vendor ID, low byte (8’h34) 26 F75387 Description Description Description Description Description July, 2007 0.27P ...
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... PWM mode. 0: indicates the fan control is in auto mode (auto generate expected fan speed according to the monitor value of VT1 temperature sensor). 1: indicates the fan control is in manual mode (program expected fan speed to CR74, CR75). 27 F75387 on the status of pin3 ...
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... This is the temperature source which FAN1 according to. 00: local temperature. 01: external temperature 1. (default) 10: external temperature 2. 11: disable. Boundary hysteresis. (0~15 degree C) Segment will change when the temperature is over the boundary temperature and below the (boundary – hysteresis ). 28 F75387 July, 2007 0.27P ...
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... When fan starts, the PWMOUT2 will increase duty-cycle from 0 to this (value x 8) directly. And if fan speed is down, the PWMOUT2 will decrease duty-cycle to 0 when the PWM duty cycle is less than this (value x 4). When fan starts, the PWMOUT1 will increase duty-cycle from 0 to this (value 29 F75387 Description Description Description July, 2007 ...
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... Description Always return 0. This register indicates the MSB of the FAN1 full speed count. This register can be auto updated by hardware or program by user. If user programs this register before hardware, then the hardware will not update this register again. Description 30 F75387 July, 2007 0.27P ...
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... Return 0 when read. This register indicates the LSB of the FAN1 full speed count. This register can be auto update by hardware or program by user. If user programming this register before hardware, then the hardware will not update this register again. Description 31 F75387 July, 2007 0.27P ...
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... GPIO2 output control. Set to 1 for output function. Set to 0 for input function (default). GPIO1 output control. Set to 1 for output function. Set to 0 for input function (default). GPIO0 output control. Set to 1 for output function. Set to 0 for input function (default). 32 F75387 July, 2007 0.27P ...
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... FAN1_MODE[2] register) will be loaded into FAN1 expected count registers (index 74h, 75h). When VT1 temperature is below this boundary – hysteresis, FAN1 segment 2 speed count register (index A5h index A5h depending on the FAN1_MODE[2] register) will be loaded into FAN1 expected count registers(index 74h,75h). 33 F75387 July, 2007 0.27P ...
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... FAN1_MODE[2] register) will be loaded into FAN1 expect count registers(index 74h,75h). - Return 0 when read. th The 4 BOUNDARY temperature for VT1 in temperature mode. When VT1 temperature exceeds this boundary, FAN1 segment 4 speed count register (index A8h A8h depending on the FAN1_MODE[2] 34 F75387 Description Description Description July, 2007 0.27P ...
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... The meaning of this register is depending on the FAN1_MODE[2]: 0: the value the fan speed count in this range. 1: the value is PWM duty-cycle (In DAC mode, the output voltage is VCC*(SEC3SPEED1)/255) in this range. – Index A7h Description The meaning of this register is depending on the FAN1_MODE[2]: 35 F75387 July, 2007 0.27P ...
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... FAN2_MODE[2] register) will be loaded into FAN2 expected count register (index 84h, 85h). Attribute - Return 0 when read. nd The 2 BOUNDARY temperature for VT2 in temperature mode. R/W When VT2 temperature exceeds this boundary, FAN2 segment 2 speed count register (index B5h index B6h depending on the 36 F75387 Description Description Description July, 2007 0.27P ...
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... FAN2 expected count registers (index 84h,85h). When VT2 temperature is below this boundary, FAN2 segment 5 speed count registers(index B9h B9h depending on the FAN1_MODE[2] register) will be loaded into FAN2 expected count registers (index 84h,85h). – Index B4h 37 F75387 July, 2007 0.27P ...
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... The meaning of this register is depending on the FAN2_MODE[2]: 0: the value the fan speed count in this range. 1: the value is PWM duty-cycle (In DAC mode, the output voltage is VCC*(SEC4SPEED2)/255) in this range. – Index B8h Description The meaning of this register is depending on the FAN2_MODE[2]: 38 F75387 July, 2007 0.27P ...
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... < T < 100 C, VCC = 3.0V to 3.6V A Fan PWM Mode Fan DAC Mode Voltage Temperature VDD input, Disables ADC , Rising Edge High Level Low Level 39 F75387 UNIT V V ° C ° C MIN TYP MAX Unit o ± ± 1 ± ± 1 ± ...
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... ILIH +1 ILIL -1 SYMBOL MIN SCL t 4.7 HD;SDA t 4.7 SU;STO t 120 SU;DAT t 5 HD;DAT F75387 UNIT CONDITIONS V VDD = 3 VDD = 3 VOL = 0 VOH = 2.4V µ A VIN = VDD µ A VIN = 0V uA VOL = 0 VDD = 3.3V V VDD = 3.3V µ A VIN = VDD µ A VIN = VDD = 3.3V V VDD = 3 ...
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... Ordering Information Part Number Package Type 16 pin SOP (Green Package) F75387SG 16 pin SSOP (Green Package) F75387RG 11. Package Dimensions Production Flow Commercial, 0 ° +70 ° C Commercial, 0 ° +70 ° C (16-SSOP Package) 41 F75387 July, 2007 0.27P ...
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... Please note that all datasheet and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this datasheet belong to their respective owner (16-SOP Package) Taipei Office Bldg. K4, 7F, No.700, Chung Cheng Rd., Chungho City, Taipei, Taiwan 235, R.O.C. TEL : 866-2-8227-8027 FAX : 866-2-8227-8037 42 F75387 July, 2007 0.27P ...
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... POWER-MOS, Linear Regulator and Clock generator. Keep as far as possible from POWER MOS. 2. Place an external 3300pF input filter capacitors across THERMDA, THERMDC and close to the F75387. Near the pin GND (Pin# 9) Must Be placed a through hole into the GND Plane before connect to the external 3300pF capacitor. ...
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... C8 1 0.1u R28 10K CON3 12V R32 4.7K D5 2N3906 R33 4.7K 1N4148 Q6 R36 R35 4.7K 1K JP6 FANIN2 Q7 R43 27K 3 MOSFET N C12 2 2N7002 47u C14 1 0.1u R39 10K CON3 Title Feature Integration Technology Inc. Size Document Number Rev B F75387S Demo Circuit 0.1 Date: Sheet July , 2007 0.27P ...
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... POWER-MOS, Linear Regulator and Clock generator. Keep as far as possible from POWER MOS. 2. Place an external 3300pF input filter capacitors across THERMDA, RT1 THERMDC and close to the F75387S. Near the pin GND (Pin# 9) Must Be placed a through hole into the GND Plane before connect to the 10K THERMISTOR external 3300pF capacitor. ...
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... C8 1 0.1u R28 10K CON3 12V R32 4.7K D5 2N3906 R33 4.7K 1N4148 Q6 R36 R35 4.7K 1K JP6 FANIN2 Q7 R43 27K 3 MOSFET N C12 2 2N7002 47u C14 1 0.1u R39 10K CON3 Title Feature Integration Technology Inc. Size Document Number Rev B F75387S Demo Circuit 0.1 Date: Sheet July , 2007 0.27P ...