f75377 Feature Integration Technology Inc., f75377 Datasheet - Page 35

• Manufacturer Part Number: f75377
• Description: Monitor With Automatic Speed Control
• Manufacturer: Feature Integration Technology Inc.

3-2 FAN2_D_RATE_SEL
1-0 FAN1_D_RATE_SEL
7-4
3-0
7-4
3-0
7-4
Bit
Bit
Bit
7.46
7.47
7.48
FAN1 and FAN2 START UP DUTY-CYCLE/VOLTAGE  Index 9Ch
FAN3 and FAN4 START UP DUTY-CYCLE/VOLTAGE  Index 9Dh
Fan SMI Time Register -- Index 9Fh
FAN2_MIN_DUTY
FAN1_MIN_DUTY
FAN3_MIN_DUTY
Reserved
Name
Name
Name
-
R/W
R/W
R/W Default
R/W
R/W
R/W Default
R/W
R/W Default
R
--
1h
1h
5h
5h
5h
--
0
Fan2 duty decreasing update rate
00: 2.5Hz
01: 5Hz (default)
10: 10Hz
11: 20Hz
Fan1 duty decreasing update rate
00: 2.5Hz
01: 5Hz (default)
10: 10Hz
11: 20Hz
When fan start, the FAN_CTRL2 will increase duty-cycle from 0 to this
(value x 8) directly. And if fan speed is down, the FAN_CTRL 2 will
decrease duty-cycle to 0 when the PWM duty cycle is less than this (value
x 4).
When fan start, the FAN_CTRL 1 will increase duty-cycle from 0 to this
(value x 8 directly. And if fan speed is down, the FAN_CTRL 1 will
decrease duty-cycle to 0 when the PWM duty cycle is less than this (value
x 4).
Reserved
When fan start, the FAN_CTRL 3 will increase duty-cycle from 0 to this
(value x 8 directly. And if fan speed is down, the FAN_CTRL 3 will
decrease duty-cycle to 0 when the PWM duty cycle is less than this (value
x 4).
Reservd
35
Description
Description
Description
F75377
March.
V0.12P
, 2008