F71872
7.6.3.48 FANPWM3 STOP DUTY-CYCLE Index 82h
Bit
Name
R/W Default
R/W
Description
7-0 F3_STOP_DUTY
25h FANPWM3 will decreasing duty-cycle to 0 from this value directly or keep
duty-cycle in this value when F3_KEEP_STOP set to 1.
7.6.3.49 FANPWM3 Output Frequency Control Index 83h
Bit
Name
R/W Default
Description
7
PWM3_DIV[7]
R/W
R/W
80h Set to 1, PRECLK(Pre-Clock) = 48M Hz
;
Set to 0, PRECLK
= 1M Hz .
6-0 PWM3_DIV[6:0]
Pre-divisor of PRECLK.
PRECLK
FANPWM3 output frequency =
(Pre − divisor) ∗ 256
So, PWM frequency ranges from 30.5Hz~187.5KHz
7.6.3.50 FANPWM3 STEP Control Register -- Index 84h
Bit
Name
R/W Default
Description
7-4 F3_UP_STEP
3-0 F3_DOWN_STEP
R/W
R/W
00h This value determines the increasing speed of PWM3_DUTY.
This value determines the decreasing speed of PWM3_DUTY
7.6.3.51 FAN3_FAULT TIME Register Index 85h
Bit
Name
R/W Default
R/W
Description
7-0 F3_FAULT_TIME
03h This register determines the time for fan to chase to the expect speed. Two
conditions cause fan fault event:
(1). When PWM_Duty reaches FFh, if the fan speed count can’t reach the
fan expect count in the time.
(2). When PWM_Duty reaches 00h, if the fan speed count can’t reach the fan
expect count in the time.
The unit of this register is 1 second. The default value is 180 seconds.
7.6.3.52 FAN3 Expect count Register-- Index 89h
Bit
Name
R/W Default
Description
7-4 Reserved
3-0 F3_EXPECT (MSB)
-
R
00h
User expect fan3 count value, program this register to control the expect fan3
speed
7.6.3.53 FAN3 Expect count Register-- Index 8Ah
Bit
Name
R/W Default
Description
82
July, 2007
V0.28P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
