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
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.
1-0
FAN1_MODE
R/W VBAT
01
FAN mode Select Register ⎯ Index 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)
011: T3 (CR76h)
2-0 TFAN1_ADJ_SEL
R/W 5VSB
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
R/W Reset Default
Description
Reserved.
7-3
Reserved
-
-
-
Set this bit 1 if FAN3 is using a faster fan.
Set this bit 1 if FAN2 is using a faster fan.
Set this bit 1 if FAN1 is using a faster fan.
5VSB
2
1
0
FLT_FAST3
FLT_FAST2
FLT_FAST1
R/W
0
5VSB
5VSB
R/W
R/W
0
0
69
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
