PCI6621 datasheet(99/204 Pages) TI

99 / 204 page

4−23

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

Name

General-purpose event enable

Type

Default

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

Power change GPE enable. When this bit is set, GPE is signaled on PWR_STS events.

6 ‡

VPP12_EN

12-V VPP GPE enable. When this bit is set, GPE is signaled on VPP12_STS events.

RSVD

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

4 ‡

GP4_EN

GPI4 GPE enable. When this bit is set, GPE is signaled on GP4_STS events.

3 ‡

GP3_EN

GPI3 GPE enable. When this bit is set, GPE is signaled on GP3_STS events.

2 ‡

GP2_EN

GPI2 GPE enable. When this bit is set, GPE is signaled on GP2_STS events.

1 ‡

GP1_EN

GPI1 GPE enable. When this bit is set, GPE is signaled on GP1_STS events.

0 ‡

GP0_EN

GPI0 GPE enable. When this bit is set, GPE is signaled on GP0_STS events.

‡ One or more bits in this register are 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

Name

General-purpose input

Type

Default

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

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

GPI4_DATA

GPI4 data input. This bit represents the logical value of the data input from GPI4.

GPI3_DATA

GPI3 data input. This bit represents the logical value of the data input from GPI3.

GPI2_DATA

GPI2 data input. This bit represents the logical value of the data input from GPI2.

GPI1_DATA

GPI1 data input. This bit represents the logical value of the data input from GPI1.

GPI0_DATA

GPI0 data input. This bit represents the logical value of the data input from GPI0.

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