5.11 ExCA I/O Windows 0 and 1 End-Address Low-Byte Registers

These registers contain the low byte of the 16-bit I/O window end 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 end-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 end-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 80Ah:

Card A ExCA Offset 0Ah

 

 

 

 

 

 

 

Card B ExCA Offset 4Ah

 

 

 

Register:

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

 

 

 

 

 

Offset:

CardBus Socket Address + 80Eh:

Card A ExCA Offset 0Eh

 

 

 

 

 

 

 

Card B ExCA Offset 4Eh

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

5.12 ExCA I/O Windows 0 and 1 End-Address High-Byte Registers

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

Bit

7

6

5

4

3

2

 

1

0

 

 

 

 

 

 

 

 

 

 

Name

 

 

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

 

 

 

 

 

Offset:

CardBus Socket Address + 80Bh:

Card A ExCA Offset 0Bh

 

 

 

 

 

 

 

Card B ExCA Offset 4Bh

 

 

 

Register:

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

 

 

 

 

 

Offset:

CardBus Socket Address + 80Fh:

Card A ExCA Offset 0Fh

 

 

 

 

 

 

 

Card B ExCA Offset 4Fh

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

5−14

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Image 142
Texas Instruments PCI7621, PCI7411, PCI7611, PCI7421 manual ExCA I/O Windows 0 and 1 End-Address Low-Byte Registers