參數(shù)資料
型號： PCI1620PDV
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù)： 84/164頁
文件大?。?/td> 720K
代理商： PCI1620PDV
4
–
16
4.28 PC Card 16-Bit I/F Legacy-Mode Base-Address Register
The PCI1620 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.
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:
Offset:
Type:
Default:
PC Card 16-bit I/F legacy-mode base-address
44h (Functions 0, 1)
Read-only, Read/Write
0000 0001h
4.29 Subsystem Vendor ID Register (Firmware Loader Function)
This register, used for system and option card identification purposes, may be required for certain operating systems.
This register is read-only or read/write, depending on the setting of bit 5 (SUBSYSRW) in the system control register.
When bit 5 is 0, this register is read/write; when bit 5 is 1, this register is read-only. The default mode is read-only.
This register is provided in function 0 to allow it to be easily loaded from the EEPROM or BIOS. In the firmware loader
function, read accesses to the subsystem vendor ID register (PCI offset 2Ch, see Section 7.11) are redirected to this
register. This register can only be changed through function 0 and is read-only in the firmware loader function. All bits
in this register are GRST only bits.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
Subsystem vendor ID (firmware loader function)
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
Subsystem vendor ID (firmware loader function)
6Ch
Read-only (Read/Write when bit 5 in the system control register is 0)
0000h
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