W83637HF Winbond Electronics Corp America, W83637HF Datasheet - Page 82

• Manufacturer Part Number: W83637HF
• Description: Description = LPC I/o Plus H/w Monitor, Smart Fan Control, Smart Card (PC/SC) Reader, Memory Stick Reader I/F, Sd/mmc Card Reader I/f ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

Register Location:
Power on Default Value
Attribute:
Size:
Bit7-6: Reserved
Bit 5: Set 1, FANPWM1 duty cycle will decrease to and keep the value set in Index 08h when
temperature goes below target range. This is to maintain the fan speed in a minimum value.
Set 0, FANPWM1 duty cycle will decrease to 0 when temperature goes below target range.
Bit 4: Set 1, FANPWM2 duty cycle will decrease to and keep the value set in Index 09h when
Bit 3: Set 1, FANPWM3 duty cycle will decrease to and keep the value set in Index 17h when
Bit2-1: FANPWM3 mode control.
Bit 0: FANPWM3 output mode selection. Set to 0, FANPWM3 pin is as output pin so that it can drive
a logical high or low signal. Set to 1, FANPWM3 pin is as open-drain pin which can only drive a logical
low signal.
Set 0, FANPWM2 duty cycle will decrease to 0 when temperature goes below target range.
temperature goes below target range. This is to maintain the fan speed in a minimum value.
temperature goes below target range. This is to maintain the fan speed in a minimum value.
Set 0, FANPWM3 duty cycle will decrease to 0 when temperature goes below target range.
Set 00, FANPWM3 is as Manual Mode. (Default).
Set 01, FANPWM3 is as Thermal Cruise Mode.
Set 10, FANPWM3 is as Fan Speed Cruise Mode.
Set 11, reserved and no function.
7
6
12h
00h
Read/Write
8 bits
5
4
3
2
- 77 -
1
0
FAN3_OB
FAN3_Mode
FAN3_Mode
FAN3_MIN_Duty
FAN2_MIN_Duty
FAN1_MIN_Duty
Reserved
Reserved
Publication Release Date: June 25, 2003
W83637HF
Revision 1.3