F81867 Datasheet, PDF (245/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

5-4 FAN3_DN_RATE R/W 5VSB
3-2 FAN2_DN_RATE R/W 5VSB
1-0 FAN1_DN_RATE 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
F81867
FAN1 and FAN2 START UP DUTY-CYCLE/VOLTAGE ⎯ Offset 9Ch
Bit
Name
R/W Reset Default
Description
When fan start, the FAN_CTRL2 will increase duty-cycle from 0
FAN2_STOP
7-4
R/W 5VSB
_DUTY
to this (value x 8) directly. And if fan speed is down, the
5h
FAN_CTRL 2 will 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
FAN1_STOP
3-0
R/W 5VSB
_DUTY
to this (value x 8 directly. And if fan speed is down, the
5h
FAN_CTRL 1 will decrease duty-cycle to 0 when the PWM duty
cycle is less than this (value x 4).
FAN3 START UP DUTY-CYCLE/VOLTAGE ⎯ Offset 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
FAN3_STOP_
3-0
R/W 5VSB
DUTY
to this (value x 8 directly. And if fan speed is down, the
5h
FAN_CTRL 3 will decrease duty-cycle to 0 when the PWM duty
cycle is less than this (value x 4).
245
Dec, 2011
V0.12P