W83697HG Nuvoton Technology Corporation of America, W83697HG Datasheet - Page 30
W83697HG
Manufacturer Part Number
W83697HG
Description
IC LPC SUPER I/O 128-PQFP
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83697HG.pdf
(109 pages)
Specifications of W83697HG
Applications
PC's, PDA's
Interface
LPC
Voltage - Supply
3.3V, 5V
Package / Case
128-XFQFN
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
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Part Number:
W83697HG
Manufacturer:
Winbond
Quantity:
1 000
Company:
Part Number:
W83697HG
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
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6.4.2
The W83697HF provides 2 sets for fan PWM speed control. The duty cycle of PWM can be
programmed 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
represented as follows.
The PWM clock frequency also can be program and defined in the Bank0.CR5C . The application
circuit is shown as follows.
Fan speed control
Duty cycle
−
PWM Clock Input
(%)
=
Programmed 8 - bit Register Value
G
D
S
R1
NMOS
Figure 9.5
- 27 -
+12V
R2
255
+
-
PNP Transistor
C
Publication Release Date: May 30, 2005
FAN
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