F81866A Datasheet, PDF (69/210 Pages) Feature Integration Technology Inc. – 6 UARTs Super IO With 128 Bytes FIFO and Power

1-0 FAN1_MODE
R/W VBAT
F81866A
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
01
0xA2-0xA3, and F81866A will auto control 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 0xA3, and F81866A will output this
desired duty or voltage to control fan speed.
FAN mode Select Register ⎯ Index 96h (FAN_PROG_SEL = 1)
Bit
Name
R/W Reset Default
Description
7-3
Reserved
-
-
- Reserved
2-0 TFAN1_ADJ_SEL
R/W 5VSB
This selects which temperature to be used as Ta for Fan1 temperature
adjustment.
000: PECI (CR7Eh)
001: T1 (CR72h)
010: T2 (CR74h)
011: T3 (CR76h)
0h
100: IBEX/TSI CPU temperature (CR7Ah)
101:IBEX PCH temperature (CR7Bh).
110: IBEX MCH temperature (CR7Ch).
111: IBEX maximum temperature (CR7Dh).
otherwise: Ta will be 0.
To access this register FAN_PROG_SEL must set to “1”.
Faster Fan Filter Control Register ⎯ Index 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.}
69
Jan, 2012
V0. 12P