參數(shù)資料
型號: PCI1520-EP
英文描述: Military Enhanced Plastic PC Card Controllers Data Manual
中文描述: 軍事增強(qiáng)塑料PC卡控制器數(shù)據(jù)手冊
文件頁數(shù): 107/125頁
文件大?。?/td> 716K
代理商: PCI1520-EP
5
20
5.18 ExCA Memory Windows 0
4 Offset-Address High-Byte Registers
These registers contain the high 6 bits of the 16-bit memory window offset address for memory windows 0, 1, 2, 3,
and 4. The lower 6 bits of these registers correspond to bits A25
A20 of the offset address. In addition, the write
protection and common/attribute memory configurations are set in this register. See Table 5
13 for a complete
description of the register contents.
Bit
7
6
5
4
3
2
1
0
Name
ExCA memory windows 0
4 offset-address high-byte
Type
RW
RW
RW
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
Register:
Offset:
ExCA memory window 0 offset-address high-byte
CardBus socket address + 815h; Card A ExCA offset 15h
Card B ExCA offset 55h
Register:
Offset:
ExCA memory window 1 offset-address high-byte
CardBus socket address + 81Dh; Card A ExCA offset 1Dh
Card B ExCA offset 5Dh
Register:
Offset:
ExCA memory window 2 offset-address high-byte
CardBus socket address + 825h; Card A ExCA offset 25h
Card B ExCA offset 65h
Register:
Offset:
ExCA memory window 3 offset-address high-byte
CardBus socket address + 82Dh; Card A ExCA offset 2Dh
Card B ExCA offset 6Dh
Register:
Offset:
ExCA memory window 4 offset-address high-byte
CardBus socket address + 835h; Card A ExCA offset 35h
Card B ExCA offset 75h
Type:
Default:
Read/Write
00h
Table 5
13. ExCA Memory Windows 0
4 Offset-Address High-Byte Registers Description
BIT
SIGNAL
TYPE
FUNCTION
7
WINWP
RW
Write protect. Bit 7 specifies whether write operations to this memory window are enabled. This bit is
encoded as:
0 = Write operations are allowed (default).
1 = Write operations are not allowed.
6
REG
RW
Bit 6 specifies whether this memory window is mapped to card attribute or common memory. This bit is encoded
as:
0 = Memory window is mapped to common memory (default).
1 = Memory window is mapped to attribute memory.
5
0
OFFHB
RW
Offset-address high byte. Bits 5
0 represent the upper address bits A25
A20 of the memory window
offset address.
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