F81867 Datasheet, PDF (241/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

F81867
FAN mode Select Register ⎯ Offset 96h (FAN_PROG_SEL = 0)
Bit
Name
R/W Reset Default
Description
7-6
Reserved
-
-
- Reserved
00: Auto fan speed control. Fan speed will follow different
temperature by different RPM defined in 0xC6-0xCE.
01: Auto fan speed control. Fan speed will follow different
temperature by different duty cycle defined in 0xC6-0xCE.
5-4 FAN3_MODE R/W VBAT
10: Manual mode fan control. User can write expected RPM
count to 0xC2-0xC3, and F81867 will adjust duty cycle (PWM
01
fan type) or voltage (linear fan type) to control fan speed
automatically.
11: Manual mode fan control. User can write expected duty
cycle (PWM fan type) or voltage (linear fan type) to 0xC3, and
F81867 will output this desired duty or voltage to control fan
speed.
00: Auto fan speed control. Fan speed will follow different
temperature by different RPM defined in 0xB6-0xBE.
01: Auto fan speed control. Fan speed will follow different
temperature by different duty cycle (voltage) defined in
0xB6-0xBE.
10: Manual mode fan control. User can write expected RPM
3-2 FAN2_MODE R/W VBAT
01 count to 0xB2-0xB3, and F81867 will adjust duty cycle (PWM
fan type) or voltage (linear fan type) to control fan speed
automatically.
11: Manual mode fan control, user can write expected duty
cycle (PWM fan type) or voltage (linear fan type) to 0xB3, and
F81867 will output this desired duty or voltage to control fan
speed.
241
Dec, 2011
V0.12P