LPC47M192 datasheet(163/228 Pages) SMSC

163 / 228 page

SMSC DS – LPC47M192

Page 163

Rev. 03/30/05

DATASHEET

NAME

REG OFFSET

(hex)

DESCRIPTION

FAN1

Default=0x00

on VTR POR

(R/W)

FAN Register 1

Bit[0] Fan Control

1=FAN1 pin is high

0=bits[6:1] control the duty cycle of the

FAN1 pin.

Bit[6:1] Duty Cycle Control for FAN1

Control the duty cycle of the FAN1 pin

000000 = pin is low

100000 = 50% duty cycle

111111 = pin is high for 63, low for 1

Bit[7] Fan 1 Clock Select

This bit is used with the Fan 1 Clock Source Select and

the Fan 1 Clock Multiplier bits in the Fan Control register

(0x58) to determine the fan speed FOUT. See Table 56

in “Fan Speed Control and Monitoring” section.

The fan speed may be doubled through bit 2 of Fan

Control Register at 0x58.

FAN2

Default = 0x00

on VTR POR

(R/W)

FAN Register 2

Bit[0] Fan Control

1=FAN2 pin is high

0=bits[6:1] control the duty cycle of the

FAN2 pin.

Bit[6:1] Duty Cycle Control for FAN2

Control the duty cycle of the FAN2 pin

000000 = pin is low

100000 = 50% duty cycle

111111 = pin is high for 63, low for 1

Bit[7] Fan 2 Clock Select

This bit is used with the Fan 2 Clock Source Select and

the Fan 2 Clock Multiplier bits in the Fan Control register

(0x58) to determine the fan speed FOUT. See Table 56

in “Fan Speed Control and Monitoring” section.

The fan speed may be doubled through bit 3 of Fan

Control Register at 0x58.

LPC47M192 Datasheet(PDF) 163 Page - SMSC Corporation

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