W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 55
W83627DHG-PT
Manufacturer Part Number
W83627DHG-PT
Description
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83627DHG-PT.pdf
(288 pages)
Specifications of W83627DHG-PT
Pin Count
128
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
W83627DHG-PT
Manufacturer:
NUVOTON
Quantity:
20 000
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W83627DHG-P/W83627DHG-PT
8.6.2
Fan Speed Control
The W83627DHG-P has four output pins for fan control, each of which offers PWM duty cycle and DC
voltage to control the fan speed. The output type (PWM or DC) of each pin is configured by Bank0
Index 04h, bits 1 ~ 0; Index 12h, bit 0; and Index 62h, bit 6.
For PWM, the duty cycle is programmed by eight-bit registers at Bank0 Index 01h, Index 03h, Index
11h and Index 61h. The duty cycle can be calculated using the following equation:
Programmed
- 8
bit
Register
Value
=
×
Dutycycle
(%)
100
%
255
The default duty cycle is FFh, or 100%. The PWM clock frequency is programmed at Bank0 Index 00h,
Index 02h, Index 10h and Index 60h.
For DC, the W83627DHG-P has a six bit digital-to-analog converter (DAC) that produces 0 to 3.3 Volts
DC. The analog output is programmed at Bank0 Index 01h, Index 03h, Index 11h and Index 61h. The
analog output can be calculated using the following equation:
Programmed
- 6
bit
Register
Value
= AVCC
×
`
OUTPUT Voltage (V)
64
The default value is 111111YY, or nearly 3.3 V, and Y is a reserved bit.
Publication Release Date: July 09, 2009
-45-
Version 1.94
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