F71869A
This selects the weighting of the difference between Ta and Tb if Ta is
lower than Tb.
3’h1: 1 (Ct = 1)
TFAN1_ADJ_DN
_RATE
3’h2: 1/2 (Ct= 1/2)
2-0
R/W 3’h0
3’h3: 1/4 (Ct = 1/4)
3’h4: 1/8 (Ct = 1/8)
otherwise: 0
To access this byte, FAN_PROG_SEL must set to “1”.
6.6.56 FAN mode Select Register ⎯ Index 96h
FAN_PROG_SEL = 0
Bit
Name
R/W 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.
10: Manual mode fan control. User can write expected RPM count to
0xC2-0xC3, and F71869A 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 0xC3, and F71869A will
output this desired duty or voltage to control fan speed.
5-4
FAN3_MODE
R/W
01
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 count to
0xB2-0xB3, and F71869A 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 F71869A will
output this desired duty or voltage to control fan speed.
3-2
FAN2_MODE
R/W
01
89
Oct., 2011
V0.19P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
