w83627thg Winbond Electronics Corp America, w83627thg Datasheet - Page 128

• Manufacturer Part Number: w83627thg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

Difference between C and E version :
A. Pin Description
B. Fan Speed Control Registers
14.1
Register Location:
Power on Default Value:
Attribute:
Size:
The register is meaningful when SYSFANOUT be programmed as PWM output.
Bit 7: SYSFANOUT PWM Input Clock Source Select. This bit selects the clock source of PWM output f
Bit 6-0: SYSFANOUT PWM Pre-Scale divider. This is the divider of clock source of PWM output
the formula is
CPUFANOUT
AUXFANOUT
SYSFANOUT
requency.
Set to 0, select 24 MHz.
Set to 1, select 180 KHz.
frequency. The maximum divider is 128 (7Fh). This divider should not be set to 0.
SYSFANOUT PWM Output Frequency Configuration Register - Index 00h
01h : divider is 1
02h : divider is 2
03h : divider is 3
:
116
115
PWM output frequency =
7
OUT 12
7
AOUT
:
6
00h
01h
Read/Write
8 bits
5
Fan speed control. Output analog voltage level to control the
Fan's speed.
Fan speed control. Use the Pulse Width Modulation (PWM) to
control the Fan’s RPM.
4
3
2
- 121 -
Pre_Scale
1
Input
W83627THF/W83627THG
0
Clock
Publication Release Date: September 26, 2006
Divider
PWM_CLK_SEL1
PWM_SCALE1
∗
256
1
Revision 1.2