Texas Instruments PCI7621 General-Purpose Event Enable Register, General-Purpose Input Register

4.33 General-Purpose Event Enable Register

The general-purpose event enable register contains bits that are set to enable GPE signals. See Table 4−11 for a complete description of the register contents.

Bit

7

6

5

4

3

2

1

0

Name

General-purpose event enable

Type

RW

RW

R

RW

RW

RW

RW

RW

Default

0

0

0

0

0

0

0

0

Register:

General-purpose event enable

Offset:

89h

Type:

Read-only, Read/Write

Default:

00h

Table 4−11. General-Purpose Event Enable Register Description

BIT

SIGNAL

TYPE

FUNCTION

7 ‡

PWR_EN

RW

Power change

GPE

enable. When this bit is set,

GPE

is signaled on PWR_STS events.

6 ‡

VPP12_EN

RW

12-V VPP

GPE

enable. When this bit is set,

GPE

is signaled on VPP12_STS events.

5

RSVD

R

Reserved. This bit returns 0 when read. A write has no effect.

4 ‡

GP4_EN

RW

GPI4

GPE

enable. When this bit is set,

GPE

is signaled on GP4_STS events.

3 ‡

GP3_EN

RW

GPI3

GPE

enable. When this bit is set,

GPE

is signaled on GP3_STS events.

2 ‡

GP2_EN

RW

GPI2

GPE

enable. When this bit is set,

GPE

is signaled on GP2_STS events.

1 ‡

GP1_EN

RW

GPI1

GPE

enable. When this bit is set,

GPE

is signaled on GP1_STS events.

0 ‡

GP0_EN

RW

GPI0

GPE

enable. When this bit is set,

GPE

is signaled on GP0_STS events.

‡This bit is cleared only by the assertion of GRST.

4.34 General-Purpose Input Register

The general-purpose input register contains the logical value of the data input to the GPI terminals. See Table 4−12 for a complete description of the register contents.

Bit	7	6		5	4	3	2	1	0
Name					General-purpose input
Type	R	R		R	RU	RU	RU	RU	RU
Default	0	0		0	X	X	X	X	X
	Register:	General-purpose input
	Offset:	8Ah
	Type:	Read/Update, Read-only
	Default:	XXh
		Table 4−12. General-Purpose Input Register Description
BIT	SIGNAL	TYPE				FUNCTION
7−5	RSVD	R	Reserved. These bits return 0s when read. Writes have no effect.
4	GPI4_DATA	RU	GPI4 data input. This bit represents the logical value of the data input from GPI4.
3	GPI3_DATA	RU	GPI3 data input. This bit represents the logical value of the data input from GPI3.
2	GPI2_DATA	RU	GPI2 data input. This bit represents the logical value of the data input from GPI2.
1	GPI1_DATA	RU	GPI1 data input. This bit represents the logical value of the data input from GPI1.
0	GPI0_DATA	RU	GPI0 data input. This bit represents the logical value of the data input from GPI0.

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