PCI1520-EP Datasheet, PDF (77/138 Pages) Texas Instruments – PC Card Controllers

4.26 Subsystem Vendor ID Register
The subsystem vendor ID register is used for system and option-card identification purposes and 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 (PCI offset 80h, see Section 4.29).
Bit
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Name
Subsystem vendor ID
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
40h (functions 0, 1)
Read-only (Read/Write if enabled by SUBSYSRW)
0000h
4.27 Subsystem ID Register
The subsystem ID register is used for system and option-card identification purposes and 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 (PCI offset 80h, see Section 4.29).
Bit
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Name
Subsystem ID
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 ID
42h (functions 0, 1)
Read-only (Read/Write if enabled by SUBSYSRW)
0000h
4.28 PC Card 16-Bit I/F Legacy-Mode Base Address Register
The PCI1520 supports the index/data scheme of accessing the ExCA registers, which are 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 (Yenta), this register is shared by functions 0
and 1. See Section 5, ExCA Compatibility Registers, for register offsets.
Bit
Name
Type
Default
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
PC Card 16-bit I/F legacy-mode base address
RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
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
4−15