5.9 ExCA I/O Windows 0 and 1 Start-Address Low-Byte Registers

These registers contain the low byte of the 16-bit I/O window start address for I/O windows 0 and 1. The 8 bits of these registers correspond to the lower 8 bits of the start address.

Bit

7

6

5

4

3

2

 

1

0

 

 

 

 

 

 

 

 

 

 

Name

 

 

ExCA I/O windows 0 and 1 start-address low-byte

 

 

 

 

 

 

 

 

 

 

 

Type

RW

RW

RW

RW

RW

RW

 

RW

RW

 

 

 

 

 

 

 

 

 

 

Default

0

0

0

0

0

0

 

0

0

 

Register:

ExCA I/O window 0 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 808h:

Card A ExCA Offset 08h

 

 

 

 

 

 

 

Card B ExCA Offset 48h

 

 

 

Register:

ExCA I/O window 1 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 80Ch:

Card A ExCA Offset 0Ch

 

 

 

 

 

 

 

Card B ExCA Offset 4Ch

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

5.10 ExCA I/O Windows 0 and 1 Start-Address High-Byte Registers

These registers contain the high byte of the 16-bit I/O window start address for I/O windows 0 and 1. The 8 bits of these registers correspond to the upper 8 bits of the start address.

Bit

7

6

5

4

3

2

 

1

0

 

 

 

 

 

 

 

 

 

 

Name

 

 

ExCA I/O windows 0 and 1 start-address high-byte

 

 

 

 

 

 

 

 

 

 

 

Type

RW

RW

RW

RW

RW

RW

 

RW

RW

 

 

 

 

 

 

 

 

 

 

Default

0

0

0

0

0

0

 

0

0

 

Register:

ExCA I/O window 0 start-address high-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 809h:

Card A ExCA Offset 09h

 

 

 

 

 

 

 

Card B ExCA Offset 49h

 

 

 

Register:

ExCA I/O window 1 start-address high-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 80Dh:

Card A ExCA Offset 0Dh

 

 

 

 

 

 

 

Card B ExCA Offset 4Dh

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

5−13

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Image 141
Texas Instruments PCI7611, PCI7411, PCI7621, PCI7421 manual ExCA I/O Windows 0 and 1 Start-Address Low-Byte Registers