f75375 Feature Integration Technology Inc., f75375 Datasheet - Page 33

• Manufacturer Part Number: f75375
• Description: Fintek Hardware Monitor Ic Datasheet
• Manufacturer: Feature Integration Technology Inc.

7.28
7.29
7.30
7.31
Power on default: 10h
Power on default: 10h
Power on default: 1111_1111b
Power on default: 0000_0001b
PWMOUT1 DROP DUTY-CYCLE  Index 6Bh
PWMOUT2 DROP DUTY-CYCLE  Index 6Ch
FAN1 full speed Count Register 1 Index71h
FAN1 expect timeout speed Register  Index 72h
7-0
7-0
7-0
7-0
Bit
Bit
Bit
Bit
FAN1_DROP_DUT
Y
FAN2_DROP_DUT
Y
FAN1_FULL
FAN1_TSPEED
Fintek
(LSB)
(MSB)
Name
Name
Name
Name
Attribute
Attribute
Attribute
Attribute
R/W
R/W
RO
R/W
PWMOUT1 will decrease duty-cycle to 0 from this value directly or
keep duty-cycle in this value when CR60 bit1 set to 1.
PWMOUT2 will decrease duty-cycle to 0 from this value directly or
keep duty-cycle in this value when CR60 bit2 set to 1.
When power on, the PWMOUT1 will output full duty cycle (FFh) to
enable system FAN. After 10 seconds when detecting FANIN1
signal, assuming the fan has been fully turned on, the fan speed
count detected will be recorded in the register. If there is no signal on
FANIN1 after power on, the PWMOUT1 will keep outputting FFh duty
cycle.
The fan1 timeout count, when software idle timeout is happen, this
count will be load to FAN1 expect register. The default count is 11/8
of FAN1_FULL reg. ( 73% of full speed).
This register is only valid at HALF-AUTOMATIC(SPEED) mode.
27
Feature Integration Technology Inc.
Description
Description
Description
Description
F75375S/F75375SG
July 2007
V0.26P