PCI6421 datasheet(126/204 Pages) TI

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5−14

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

Name

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

Type

Default

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

Offset:

CardBus Socket Address + 80Ah:

Card A ExCA Offset 0Ah

Card B ExCA Offset 4Ah

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

Name

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

Type

Default

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

Offset:

CardBus Socket Address + 80Bh:

Card A ExCA Offset 0Bh

Card B ExCA Offset 4Bh

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

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