5.13 ExCA Memory Windows 0−4 Start-Address Low-Byte Registers

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

Bit

7

6

5

4

3

2

 

1

0

 

 

 

 

 

 

 

 

 

 

Name

 

 

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

 

 

 

 

 

Offset:

CardBus Socket Address + 810h:

Card A ExCA Offset 10h

 

 

 

 

 

 

 

Card B ExCA Offset 50h

 

 

 

Register:

ExCA memory window 1 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 818h:

Card A ExCA Offset 18h

 

 

 

 

 

 

 

Card B ExCA Offset 58h

 

 

 

Register:

ExCA memory window 2 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 820h:

Card A ExCA Offset 20h

 

 

 

 

 

 

 

Card B ExCA Offset 60h

 

 

 

Register:

ExCA memory window 3 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 828h:

Card A ExCA Offset 28h

 

 

 

 

 

 

 

Card B ExCA Offset 68h

 

 

 

Register:

ExCA memory window 4 start-address low-byte

 

 

 

 

 

Offset:

CardBus Socket Address + 830h:

Card A ExCA Offset 30h

 

 

 

 

 

 

 

Card B ExCA Offset 70h

 

 

 

Type:

Read/Write

 

 

 

 

 

 

 

 

Default:

00h

 

 

 

 

 

 

 

5−15

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Image 143
Texas Instruments PCI7421, PCI7411, PCI7611, PCI7621 manual ExCA Memory Windows 0−4 Start-Address Low-Byte Registers