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)： 107/138頁
文件大?。?/td> 745K
代理商： PCI1520I
511
5.7
ExCA Address Window Enable Register
The ExCA address window enable register enables/disables the memory and I/O windows to the 16-bit PC Card. By
default, all windows to the card are disabled. The PCI1520 does not acknowledge PCI memory or I/O cycles to the
card if the corresponding enable bit in this register is 0, regardless of the programming of the memory or I/O window
start/end/offset address registers. See Table 59 for a complete description of the register contents.
Bit
7
6
5
4
3
2
1
0
Name
ExCA address window enable
Type
RW
RW
R
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
Register:
Offset:
ExCA address window enable
CardBus socket address + 806h; Card A ExCA offset 06h
Card B ExCA offset 46h
Type:
Default:
Read-only, Read/Write
00h
Table 59. ExCA Address Window Enable Register Description
BIT
SIGNAL
TYPE
FUNCTION
7
IOWIN1EN
RW
I/O window 1 enable. Bit 7 enables/disables I/O window 1 for the PC Card. This bit is encoded as:
0 = I/O window 1 disabled (default)
1 = I/O window 1 enabled
6
IOWIN0EN
RW
I/O window 0 enable. Bit 6 enables/disables I/O window 0 for the PC Card. This bit is encoded as:
0 = I/O window 0 disabled (default)
1 = I/O window 0 enabled
5
RSVD
R
Reserved. Bit 5 returns 0 when read.
4
MEMWIN4EN
RW
Memory window 4 enable. Bit 4 enables/disables memory window 4 for the PC Card. This bit is
encoded as:
0 = Memory window 4 disabled (default)
1 = Memory window 4 enabled
3
MEMWIN3EN
RW
Memory window 3 enable. Bit 3 enables/disables memory window 3 for the PC Card. This bit is
encoded as:
0 = Memory window 3 disabled (default)
1 = Memory window 3 enabled
2
MEMWIN2EN
RW
Memory window 2 enable. Bit 2 enables/disables memory window 2 for the PC Card. This bit is
encoded as:
0 = Memory window 2 disabled (default)
1 = Memory window 2 enabled
1
MEMWIN1EN
RW
Memory window 1 enable. Bit 1 enables/disables memory window 1 for the PC Card. This bit is
encoded as:
0 = Memory window 1 disabled (default)
1 = Memory window 1 enabled
0
MEMWIN0EN
RW
Memory window 0 enable. Bit 0 enables/disables memory window 0 for the PC Card. This bit is
encoded as:
0 = Memory window 0 disabled (default)
1 = Memory window 0 enabled
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