![](http://datasheet.mmic.net.cn/330000/PCI4515_datasheet_16443874/PCI4515_118.png)
516
5.15 ExCA Memory Windows 04 End-Address Low-Byte Registers
These registers contain the low byte of the 16-bit memory window end address for memory windows 0, 1, 2, 3, and 4.
The 8 bits of these registers correspond to bits A19A12 of the end address.
Bit
7
6
5
4
3
2
1
0
Name
ExCA memory windows 04 end-address low-byte
Type
RW
RW
RW
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
Register:
Offset:
Register:
Offset:
Register:
Offset:
Register:
Offset:
Register:
Offset:
Type:
Default:
ExCA memory window 0 end-address low-byte
CardBus Socket Address + 812h:
ExCA memory window 1 end-address low-byte
CardBus Socket Address + 81Ah:
ExCA memory window 2 end-address low-byte
CardBus Socket Address + 822h:
ExCA memory window 3 end-address low-byte
CardBus Socket Address + 82Ah:
ExCA memory window 4 end-address low-byte
CardBus Socket Address + 832h:
Read/Write
00h
Card A ExCA Offset 12h
Card A ExCA Offset 1Ah
Card A ExCA Offset 22h
Card A ExCA Offset 2Ah
Card A ExCA Offset 32h
5.16 ExCA Memory Windows 04 End-Address High-Byte Registers
These registers contain the high nibble of the 16-bit memory window end address for memory windows 0, 1, 2, 3,
and 4. The lower 4 bits of these registers correspond to bits A23A20 of the end address. In addition, the memory
window wait states are set in this register. See Table 512 for a complete description of the register contents.
Bit
7
6
5
4
3
2
1
0
Name
ExCA memory windows 04 end-address high-byte
Type
RW
RW
R
R
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
Register:
Offset:
Register:
Offset:
Register:
Offset:
Register:
Offset:
Register:
Offset:
Type:
Default:
ExCA memory window 0 end-address high-byte
CardBus Socket Address + 813h:
ExCA memory window 1 end-address high-byte
CardBus Socket Address + 81Bh:
ExCA memory window 2 end-address high-byte
CardBus Socket Address + 823h:
ExCA memory window 3 end-address high-byte
CardBus Socket Address + 82Bh:
ExCA Memory window 4 end-address high-byte
CardBus Socket Address + 833h:
Read/Write, Read-only
00h
Card A ExCA Offset 13h
Card A ExCA Offset 1Bh
Card A ExCA Offset 23h
Card A ExCA Offset 2Bh
Card A ExCA Offset 33h
Table 512. ExCA Memory Windows 04 End-Address High-Byte Registers Description
BIT
SIGNAL
TYPE
FUNCTION
76
MEMWS
RW
Wait state. These bits specify the number of equivalent ISA wait states to be added to 16-bit memory
accesses. The number of wait states added is equal to the binary value of these 2 bits.
54
RSVD
R
Reserved. These bits return 0s when read. Writes have no effect.
30
ENDHN
RW
End-address high nibble. These bits represent the upper address bits A23A20 of the memory window end
address.