F71869A
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 F71869A 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 F71869A will
output this desired duty or voltage to control fan speed.
1-0
FAN1_MODE
R/W
01
FAN_PROG_SEL = 1
Bit
Name
R/W 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
0h
100: Digital T1 (CR7Ah)
101: Digital T1 (CR7Bh)
110: Digital T2 (CR7Ch)
111: Digital T3 (CR7Dh)
otherwise: Ta will be 0.
To access this register FAN_PROG_SEL must set to “1”.
6.6.57 Auto FAN1 and FAN2 Boundary Hystersis Select Register ⎯ Index 98h
Bit
Name
R/W Default
Description
Boundary hysteresis. (0~15 degree C)
7-4
FAN2_HYS
R/W
R/W
4h
4h
Segment will change when the temperature over the boundary
temperature and below the ( boundary – hysteresis ).
Boundary hysteresis. (0~15 degree C)
3-0
FAN1_HYS
Segment will change when the temperature over the boundary
temperature and below the ( boundary – hysteresis ).
90
Oct., 2011
V0.19P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
