f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 8

• Manufacturer Part Number: f75387
• Description: ?1o C Accuracy H/w Monitor Ic With Automatic Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

5.1.
5.2.
5.3.
Pin No.
16
9
Pin No.
1
2
3
4
10
11
12
14
15
Pin No.
5
Power Pin
Monitoring Items and Fan Speed Control
Alert Signals and Others
Pin Name
VCC
GND(D-)
Pin Name
FANIN1
GPIO0(Default)
FANIN2
VOLT_FAULT#
PWM1(Default)
DAC1
ADDR_TRAP
GPIO1(Default)
PWM2
DAC2
FAN_FAULT#
VIN3
VIN2
VIN1
D2+
D1+
Pin Name
GPIO2(Default)
SMI#
VOLT_FAULT#
Type
P
P
Type
IN
IN
IN
OD
OOD
AOUT
IN
IN
OOD
AOUT
OD
AIN
AIN
AIN
AIN
AIN
IN
OD
OD
Type
ts5V
ts5V
ts5V
ts5V
ts5V
ts5V
12
12
12
12
/OD
/OD
12
12
/OD
12
12
12
GND(If sensing CPU/GPU thermal diode or transistor 3906, please connect
0V to 2.048V FSR Analog Inputs
Description
3.3V power supply voltage input
D- to this pin. Refer to application circuit)
Description
0V to +3.3V amplitude fan tachometer input.
General purpose I/O pin. Default Open drain
0V to +3.3V amplitude fan tachometer input.
This pin will be a logic LOW when the voltage exceeds its limit.
Use PWM duty cycle to control fan1 speed.
Use linear voltage output (0~3.3V) to control fan1 speed.
Address power on trapping pin. Internal weak pull down. The internal
pull-down resistor will be turn-off after power-on trapping. For detail
description, please see register description index01h
General purpose I/O pin. Default Open drain
Use PWM duty cycle to control fan2 speed.
Use linear voltage output (0~3.3V) to control fan2 speed.
This pin will be a logic LOW when the fan speed is abnormal.
0V to 2.048V FSR Analog Inputs
0V to 2.048V FSR Analog Inputs
Thermistor / transistor 2N3906/ CPU/GPU thermal diode terminal input
Thermistor / transistor 2N3906/ CPU/GPU thermal diode terminal input
Description
General purpose I/O function. Default pure open drain
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
July, 2007
F75387
0.27P