9 subsystem vendor identification register, 10 subsystem identification register, 11 capabilities pointer register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
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11.9 Subsystem Vendor Identification Register
The subsystem identification register, used for system and option card identification purposes, may be required for
certain operating systems. This read-only register is initialized through the EEPROM and can be written through the
subsystem access register at PCI offset 50h (see Section 11.22). All bits in this register are reset by GRST only.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
Subsystem vendor identification
Type
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
Subsystem vendor identification
Offset:
2Ch
Type:
Read/Update
Default:
0000h
11.10 Subsystem Identification Register
The subsystem identification register, used for system and option card identification purposes, may be required for
certain operating systems. This read-only register is initialized through the EEPROM and can be written through the
subsystem access register at PCI offset 50h (see Section 11.22). All bits in this register are reset by GRST only.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
Subsystem identification
Type
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
RU
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
Subsystem identification
Offset:
2Eh
Type:
Read/Update
Default:
0000h
11.11
Capabilities Pointer Register
The power management capabilities pointer register provides a pointer into the PCI configuration header where the
power-management register block resides. Since the PCI power management registers begin at 44h, this read-only
register is hardwired to 44h.
Bit
7
6
5
4
3
2
1
0
Name
Capabilities pointer
Type
R
R
R
R
R
R
R
R
Default
0
1
0
0
0
1
0
0
Register:
Capabilities pointer
Offset:
34h
Type:
Read-only
Default:
44h