Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 151
5−23
5.21 ExCA I/O Windows 0 and 1 Offset-Address Low-Byte Registers
These registers contain the low byte of the 16-bit I/O window offset address for I/O windows 0 and 1. The 8 bits of
these registers correspond to the lower 8 bits of the offset address, and bit 0 is always 0.
Bit
7
6
5
4
3
2
1
0
Name
ExCA I/O windows 0 and 1 offset-address low-byte
Type
RW
RW
RW
RW
RW
RW
RW
R
Default
0
0
0
0
0
0
0
0
Register:
ExCA I/O window 0 offset-address low-byte
Offset:
CardBus Socket Address + 836h:
Card A ExCA Offset 36h
Card B ExCA Offset 76h
Register:
ExCA I/O window 1 offset-address low-byte
Offset:
CardBus Socket Address + 838h:
Card A ExCA Offset 38h
Card B ExCA Offset 78h
Type:
Read/Write, Read-only
Default: 00h
5.22 ExCA I/O Windows 0 and 1 Offset-Address High-Byte Registers
These registers contain the high byte of the 16-bit I/O window offset address for I/O windows 0 and 1. The 8 bits of
these registers correspond to the upper 8 bits of the offset address.
Bit
7
6
5
4
3
2
1
0
Name
ExCA I/O windows 0 and 1 offset-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 offset-address high-byte
Offset:
CardBus Socket Address + 837h:
Card A ExCA Offset 37h
Card B ExCA Offset 77h
Register:
ExCA I/O window 1 offset-address high-byte
Offset:
CardBus Socket Address + 839h:
Card A ExCA Offset 39h
Card B ExCA Offset 79h
Type:
Read/Write
Default: 00h