參數(shù)資料
型號: PCI1520I
廠商: Texas Instruments, Inc.
英文描述: PC CARD CONTROLLERS
中文描述: PC卡控制器
文件頁數(shù): 120/138頁
文件大?。?/td> 745K
代理商: PCI1520I
524
5.23 ExCA Memory Windows 04 Page Registers
The upper 8 bits of a 4-byte PCI memory address are compared to the contents of this register when decoding
addresses for 16-bit memory windows. Each window has its own page register, all of which default to 00h. By
programming this register to a nonzero value, host software can locate 16-bit memory windows in any 1 of 256
16-Mbyte regions in the 4-Gbyte PCI address space. These registers are only accessible when the ExCA registers
are memory-mapped; that is, these registers cannot be accessed using the index/data I/O scheme.
Bit
7
6
5
4
3
2
1
0
Name
ExCA memory windows 04 page
Type
RW
RW
RW
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
ExCA memory windows 04 page
CardBus socket address + 840h, 841h, 842h, 843h, 844h
Read/Write
00h
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