F81867 Datasheet, PDF (242/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

1-0 FAN1_MODE R/W VBAT
F81867
00: Auto fan speed control. Fan speed will follow different
temperature by different RPM defined in 0xA6-0xAE.
01: Auto fan speed control. Fan speed will follow different
temperature by different duty cycle defined in 0xA6-0xAE.
10: Manual mode fan control, user can write expected RPM
count to 0xA2-0xA3, and F81867 will auto control duty cycle
01
(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 0xA3, and
F81867 will output this desired duty or voltage to control fan
speed.
Fan1 Adjustment Temperature Select Register – Offset 96h (FAN_PROG_SEL = 1)
Bit
Name
R/W Reset Default
Description
7-3
Reserved
-
-
- Reserved
This selects which temperature to be used as Ta for Fan1
temperature adjustment.
000: PECI (CR7Eh)
001: T1 (CR72h)
010: T2 (CR74h)
2-0 TFAN1_ADJ_SEL R/W 5VSB 0h 011: T0 (CR70h)
100: IBX/TSI CPU temperature (CR7Ah)
101:IBX PCH temperature (CR7Bh).
110: IBX MCH temperature (CR7Ch).
111: IBX maximum temperature (CR7Dh).
To access this register FAN_PROG_SEL must set to “1”.
Faster Fan Filter Control Register ⎯ Offset 97h
Bit
Name
7-3
Reserved
2
FLT_FAST3
R/W Reset Default
Description
-
-
- ^Reserved.
R/W 5VSB 0 ^{Set this bit 1 if FAN3 is using a faster fan.}
1
FLT_FAST2
R/W 5VSB 0 ^{Set this bit 1 if FAN2 is using a faster fan.}
0
FLT_FAST1
R/W 5VSB 0 ^{Set this bit 1 if FAN1 is using a faster fan.}
242
Dec, 2011
V0.12P