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XIO2000 数据表(PDF) 63 Page - Texas Instruments

部件名 XIO2000
功能描述  XIO2000 PCI Express to PCI Bus Translation Bridge
PDF  150 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

XIO2000 数据表(HTML) 63 Page - Texas Instruments

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Classic PCI Configuration Space
51
November 2005
SCPS097B
4.24 I/O Base Upper 16-Bit Register
This read/write register specifies the upper 16 bits of the I/O base register. See Table 4−15 for a complete
description of the register contents.
PCI register offset:
30h
Register type:
Read/Write
Default value:
0000h
BIT NUMBER
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET STATE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 4−15. I/O Base Upper 16-Bit Register Description
BIT
FIELD NAME
ACCESS
DESCRIPTION
15:0
IOBASE
RW
I/O base upper 16 bits. Defines the upper 16 bits of the lowest address of the I/O address range
that determines when to forward I/O transactions downstream. These bits correspond to address
bits [31:20] in the I/O address. The lower 20 bits are assumed to be 00000h.
4.25 I/O Limit Upper 16-Bit Register
This read/write register specifies the upper 16 bits of the I/O limit register. See Table 4−16 for a complete
description of the register contents.
PCI register offset:
32h
Register type:
Read/Write
Default value:
0000h
BIT NUMBER
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET STATE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 4−16. I/O Limit Upper 16-Bit Register Description
BIT
FIELD NAME
ACCESS
DESCRIPTION
15:0
IOLIMIT
RW
I/O limit upper 16 bits. Defines the upper 16 bits of the top address of the I/O address range that
determines when to forward I/O transactions downstream. These bits correspond to address
bits [31:20] in the I/O address. The lower 20 bits are assumed to be FFFFFh.
4.26 Capabilities Pointer Register
This read-only register provides a pointer into the PCI configuration header where the PCI power management
block resides. Since the PCI power management registers begin at 50h, this register is hardwired to 50h.
PCI register offset:
34h
Register type:
Read-only
Default value:
50h
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0
1
0
1
0
0
0
0



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