w83627hg Winbond Electronics Corp America, w83627hg Datasheet - Page 41

• Manufacturer Part Number: w83627hg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

W83627HF/ F/ HG/ G
7.4.2
Fan speed control
The W83627HF provides 2 sets for fan PWM speed control. The duty cycle of PWM can be pro-
grammed by a 8-bit registers which are defined in the Bank0 CR5A and CR5B. The default duty cycle
is set to 100%, that is, the default 8-bit registers is set to FFh. The expression of duty can be repre-
sented as follows.
Programmed 8 - bit Register Value
Duty cycle

(%)
u
100%
255
The PWM clock frequency also can be program and defined in the Bank0.CR5C. The application cir-
cuit is shown as follows.
Figure. 8.5
Publication Release Date: June 09, 2006
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Revision 2.27