F81866A Datasheet, PDF (72/210 Pages) Feature Integration Technology Inc. – 6 UARTs Super IO With 128 Bytes FIFO and Power

5-4 FAN3_DN_RATE
3-2 FAN2_DN_RATE
1-0 FAN1_DN_RATE
R/W 5VSB
R/W 5VSB
R/W 5VSB
Fan3 duty update rate:
00: 2Hz
01 01: 5Hz (default)
10: 10Hz
11: 20Hz
Fan2 duty update rate:
00: 2Hz
01 01: 5Hz (default)
10: 10Hz
11: 20Hz
Fan1 duty update rate:
00: 2Hz
01 01: 5Hz (default)
10: 10Hz
11: 20Hz
F81866A
FAN1 and FAN2 START UP DUTY-CYCLE/VOLTAGE ⎯ Index 9Ch
Bit
Name
R/W Reset Default
Description
When fan start, the FAN_CTRL2 will increase duty-cycle from 0 to this
FAN2_STOP
(value x 8) directly. And if fan speed is down, the FAN_CTRL 2 will
7-4
R/W 5VSB 5h
_DUTY
decrease duty-cycle to 0 when the PWM duty cycle is less than this
(value x 4).
When fan start, the FAN_CTRL 1 will increase duty-cycle from 0 to this
FAN1_STOP
(value x 8 directly. And if fan speed is down, the FAN_CTRL 1 will
3-0
R/W 5VSB 5h
_DUTY
decrease duty-cycle to 0 when the PWM duty cycle is less than this
(value x 4).
FAN3 START UP DUTY-CYCLE/VOLTAGE ⎯ Index 9Dh
Bit
Name
R/W Reset Default
Description
7-4
Reserved
-
-
- Reserved.
When fan start, the FAN_CTRL 3 will increase duty-cycle from 0 to this
FAN3_STOP_
(value x 8 directly. And if fan speed is down, the FAN_CTRL 3 will
3-0
R/W 5VSB 5h
DUTY
decrease duty-cycle to 0 when the PWM duty cycle is less than this
(value x 4).
72
Jan, 2012
V0. 12P