4.35 General-Purpose Output Register

The general-purpose output register is used to drive the GPO4−GPO0 outputs. See Table 4−13 for a complete description of the register contents.

Bit

7

6

 

5

 

4

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

Name

 

 

 

 

 

General-purpose output

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

R

R

 

R

 

RW

RW

 

RW

RW

RW

 

 

 

 

 

 

 

 

 

 

 

 

Default

0

0

 

0

 

0

0

 

0

0

0

 

Register:

General-purpose output

 

 

 

 

 

 

 

Offset:

8Bh

 

 

 

 

 

 

 

 

 

 

Type:

Read-only, Read/Write

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

 

 

 

 

Table 4−13. General-Purpose Output Register Description

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

SIGNAL

TYPE

 

 

 

 

FUNCTION

 

 

 

 

 

 

 

 

 

7−5

RSVD

R

Reserved. These bits return 0s when read. Writes have no effect.

 

 

 

 

 

 

 

 

4 ‡

GPO4_DATA

RW

This bit represents the logical value of the data driven to GPO4.

 

 

 

 

 

 

 

 

3 ‡

GPO3_DATA

RW

This bit represents the logical value of the data driven to GPO3.

 

 

 

 

 

 

 

 

2 ‡

GPO2_DATA

RW

This bit represents the logical value of the data driven to GPO2.

 

 

 

 

 

 

 

 

1 ‡

GPO1_DATA

RW

This bit represents the logical value of the data driven to GPO1.

 

 

 

 

 

 

 

 

0 ‡

GPO0_DATA

RW

This bit represents the logical value of the data driven to GPO0.

 

 

This bit is cleared only by the assertion of GRST.

4−25

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Texas Instruments PCI7421, PCI7411, PCI7611, PCI7621 manual General-Purpose Output Register, General-purpose output