f75334 Feature Integration Technology Inc., f75334 Datasheet - Page 42

• Manufacturer Part Number: f75334
• Description: Performance Controller
• Manufacturer: Feature Integration Technology Inc.

7-4
3-0
7-6
5-4
3-2
1-0
7-4 FAN2_MIN_DUTY
3-0 FAN1_MIN_DUTY
7-4 Reserved
3-0 FAN3_MIN_DUTY
Bit
Bit
Bit
Bit
Bit
8.2.32 Auto Fan3 Boundary Hystersis Select Register -- Index 99h
8.2.33 Fan1~Fan3 Duty Change Rate Select Register -- Index 9Bh
8.2.34 FAN1 and FAN2 START UP DUTY-CYCLE/VOLTAGE  Index 9Ch
8.2.35 FAN3 START UP DUTY-CYCLE/VOLTAGE  Index 9Dh
8.2.36 Fan Fault Time Register -- Index 9Fh
7
6
5
4
Reserved S
FAN3_HYS
FAN3_LD_BEFORE_EN R/W
FAN2_LD_BEFORE_EN R/W
FAN1_LD_BEFORE_EN R/W
FAN3_RATE_SEL
FAN2_RATE_SEL
FAN1_RATE_SEL
Reserved
Reserved
Name
Name
Name
Name
Name
R/W Default
R/W
R/W
R/W Default
R/W
R/W
R/W
R/W
R/W Default
R/W
R/W
R/W Default
R/W
R/W
R/W Default
R/W
2h
2h
0h
0h
0h
0h
5h
5h
5h
5h
0
0
0
0
Reserved
0000: Boundary hysteresis. (0~15 degree C)
Segment will change when the temperature over the boundary
temperature and below the ( boundary – hysteresis ).
Reserved
x0: Duty change per 200ms, x1: Duty change per Sec.
x0: Duty change per 200ms, x1: Duty change per Sec.
x0: Duty change per 200ms, x1: Duty change per Sec.
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).
Reserved
Set 1 that fan speed will keep current temp. status before system re-boot
up.
Set 1 that fan speed will keep current temp. status before system re-boot
up.
Set 1 that fan speed will keep current temp. status before system re-boot
up.
35
Description
Description
Description
Description
Description
F75334
July, 2007
V0.25P