PC87393 datasheet(43/148 Pages) NSC

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2.0 Device Architecture and Configuration (Continued)

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2.10.7

SuperI/O Configuration 6 Register (SIOCF6)

Write access to this register can be inhibited by setting bit 7. Activation of each logical device (bits 0-4) is also affected by

bit 0 of the logical device Activate register, index 30h and bit 0 of the SIOCF1 register.

Location:

Index 26h

Type:

R/W

2.10.8

SuperI/O Revision ID Register (SRID)

This register contains the ID number of the specific family member (Chip ID) and the chip revision number (Chip Rev). The

Chip Rev field identity number the chip revision.

Location:

Index 27h

Type:

Bit

76543210

Name

SIOCF6

Software

Lock

General-Purpose

Scratch

Reserved

Serial Port 1

Disable

Serial Port 2

Disable

Parallel Port

Disable

FDC

Disable

Reset

00000000

Bit

Description

SIOCF6 Software Lock. When this bit is set to 1 by software, it can be cleared only by hardware reset.

0: Write access to bits 0-6 of this register enabled (default)

1: Bits 6-0 of this register are RO

6-5

General-Purpose Scratch

Reserved

Serial Port 1 Disable

0: Enabled (default)

1: Disabled

Serial Port 2 Disable

0: Enabled (default)

1: Disabled

Parallel Port Disable

0: Enabled (default)

1: Disabled

FDC Disable

0: Enabled (default)

1: Disabled

Bit

76543210

Name

Chip ID

Chip Rev

Reset

XXXXX

Bit

Description

7-5

Chip ID.

4-0

Chip Rev. These bits identify the device revision.

PC87393 Datasheet(PDF) 43 Page - National Semiconductor (TI)

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