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PCI6421 Datasheet(PDF) 93 Page - Texas Instruments

Part # PCI6421
Description  DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER
PDF  204 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCI6421 Datasheet(HTML) 93 Page - Texas Instruments

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4.28 PC Card 16-Bit I/F Legacy-Mode Base-Address Register
The PCI6x21/PCI6x11 controller supports the index/data scheme of accessing the ExCA registers, which is mapped
by this register. An address written to this register is the address for the index register and the address+1 is the data
address. Using this access method, applications requiring index/data ExCA access can be supported. The base
address can be mapped anywhere in 32-bit I/O space on a word boundary; hence, bit 0 is read-only, returning 1 when
read. As specified in the PCI to PCMCIA CardBus Bridge Register Description specification, this register is shared
by functions 0 and 1. See the ExCA register set description in Section 5 for register offsets. All bits in this register
are reset by GRST only.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
PC Card 16-bit I/F legacy-mode base-address
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
PC Card 16-bit I/F legacy-mode base-address
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Register:
PC Card 16-bit I/F legacy-mode base-address
Offset:
44h (Functions 0, 1)
Type:
Read-only, Read/Write
Default:
0000 0001h



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