PC87351 datasheet(32/86 Pages) NSC

32 / 86 page

2.0 Device Architecture and Configuration (Continued)

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2.4.4

SuperI/O Configuration 2 Register (SIOCF2)

This register controls pin multiplexing of pins: 34, 35, 37-43, 98 and 99.

Location:

Index 22h

Type:

R/W

Bit

7654

210

Name

Pin 99

Function

Select

Pin 98 Function Select

Pin 42 Function Select

Pin 41 Function Select

Select

Serial IRQ

Reset

1010

001

Bit

Description

Pin 99 Function Select

0: GPIO20

1: GA20 (default).

6-5

Pin 98 Function Select

Bits

6 5

Function

0 0

GPIO17

0 1

KBRST (default)

1 0

P12

1 1

PNF (PPM mode enabled)

4-3

Pin 42 Function Select. The setting of bit 0 of this register effects the function selected, as follows:

Bits

4 3 0

Function

0 0 X

GPIO15 (default)

0 1 1

GPIO15

0 1 0

IRQ11

1 0 X

P12

1 1 X

P17

2-1

Pin 41 Function Select. The setting of bit 0 of this register effects the function selected, as follows:

Bits

2 1 0

Function

0 0 X

GPIO14 (default)

0 1 1

GPIO14

0 1 0

IRQ9

1 0 X

IRRX2/IRSL0

1 1 X

P17

Select Serial IRQ

0: Pins 34, 35, 37-40 and 43 function as IRQ1, IRQ3-7 and IRQ12, respectively

1: Pins 34 and 35 function as PCICLK and SERIRQ, respectively. Pins 37-40 and 43 function as GPIO (default).

PC87351 Datasheet(PDF) 32 Page - National Semiconductor (TI)

PC87351 Datasheet(HTML) 32 Page - National Semiconductor (TI)

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