5.17 ExCA Memory Windows 0−4 Offset-Address Low-Byte Registers

These registers contain the low byte of the 16-bit memory window offset address for memory windows 0, 1, 2, 3, and 4. The 8 bits of these registers correspond to bits A19−A12 of the offset address.

Bit

7

6

5

4

3

 

2

 

1

0

 

 

 

 

 

 

 

 

 

 

Name

 

 

ExCA memory windows 0−4 offset-address low-byte

 

 

 

 

 

 

 

 

 

 

 

Type

RW

RW

RW

RW

RW

 

RW

 

RW

RW

 

 

 

 

 

 

 

 

 

 

 

Default

0

0

0

0

0

 

0

 

0

0

 

Register:

ExCA memory window 0 offset-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 814h:

Card A ExCA Offset 14h

 

 

 

 

 

 

 

Card B ExCA Offset 54h

 

 

 

Register:

ExCA memory window 1 offset-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 81Ch:

Card A ExCA Offset 1Ch

 

 

 

 

 

 

 

Card B ExCA Offset 5Ch

 

 

 

Register:

ExCA memory window 2 offset-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 824h:

Card A ExCA Offset 24h

 

 

 

 

 

 

 

Card B ExCA Offset 64h

 

 

 

Register:

ExCA memory window 3 offset-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 82Ch:

Card A ExCA Offset 2Ch

 

 

 

 

 

 

 

Card B ExCA Offset 6Ch

 

 

 

Register:

ExCA memory window 4 offset-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 834h:

Card A ExCA Offset 34h

 

 

 

 

 

 

 

Card B ExCA Offset 74h

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

 

5−19

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Image 147
Texas Instruments PCI7421, PCI7411, PCI7611, PCI7621 manual ExCA Memory Windows 0−4 Offset-Address Low-Byte Registers