PC8374L datasheet(56/239 Pages) NSC

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3.0 Device Architecture and Configuration (Continued)

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Revision1.1

3.7.7

SuperI/O Configuration 3 Register (SIOCF3)

Power Well: Varies per bit

Location:

Index 23h

Type:

R/W or RO

Bit

Name

PWM3EN

PWM2EN

PWM1EN

Reserved

373COMP

SP2EN

IREN

Reset

Power Well

VBAT

1. See Sections 2.1 and 2.2

VBAT

VSB3

VBAT

VSB3

Bit

Description

PWM3EN (FANPWM3 Multiplex Control). Selects the function connected to the GPIOE05/FANPWM3 pin.

0: GPIOE05 port: GPIO (default)

1: FANPWM3: Health Management

For correct selection of this GPIO on this pin, also see Table 3 on page 18.

PWM2EN (FANPWM2 Multiplex Control). Selects the function connected to the GPIOE04/FANPWM2 pin.

0: GPIOE04 port: GPIO (default)

1: FANPWM2: Health Management

For correct selection of this GPIO on this pin, also see Table 3 on page 18.

PWM1EN (FANPWM1 Multiplex Control). Selects the function connected to the GPIOE03/FANPWM1 pin.

0: GPIOE03 port: GPIO (default)

1: FANPWM1: Health Management

For correct selection of this GPIO on this pin, also see Table 3 on page 18.

4-3

Reserved.

373COMP (PC87373 Compatibility Mode). Selects Serial Port 2 and InfraRed Port pinout.

Signal Name

373COMP Pinout

Bit = 0

Bit = 1

RI2

118

119

SIN2

119

121

SOUT2

120

122

DSR2

121

124

RTS2

122

125

CTS2

124

126

DTR_BOUT2

125

127

DCD2

126

128

IRRX

127

120

IRTX

128

118

SP2EN (Serial Port 2 Multiplex Control). Selects either GPIO or Serial Port 2.

0: Selects the following GPIO signals:

GPIOE01, GPIOE03, GPO12, GPIOE04, GPO13, GPIOE05 and:

— when 373COMP bit = 0: GPIOE00, GPIOE02

— when 373COMP bit = 1: GPIOE06, GPIOE07

1: Selects Serial Port 2 signals

For correct selection of GPIOs on these pins, also see Table 3 on page 18.

IREN (InfraRed Multiplex Control). Selects InfraRed Port or GPIO.

0: GPIOE02, GPIOE00 (when 373COMP bit is 1) or GPIOE06, GPIOE07 (when 373COMP bit is 0) (default)

1: IRRX, IRTX signals

For correct selection of GPIOs on these pins, also see Table 3 on page 18.

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PC8374L Datasheet(PDF) 56 Page - National Semiconductor (TI)

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