23 subsystem access register, 24 diagnostic register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 269

12−15
12.23 Subsystem Access Register
The contents of the subsystem access register are aliased to the subsystem vendor ID and subsystem ID registers
at PCI offsets 2Ch and 2Eh, respectively. See Table 12−16 for a complete description of the register contents.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
Subsystem access
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
Subsystem access
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
Register:
Subsystem access
Offset:
8Ch
Type:
Read/Write
Default:
0000 0000h
Table 12−16. Subsystem Access Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
31−16
SubsystemID
RW
Subsystem device ID. The value written to this field is aliased to the subsystem ID register at
PCI offset 2Eh.
15−0
SubsystemVendorID
RW
Subsystem vendor ID. The value written to this field is aliased to the subsystem vendor ID
register at PCI offset 2Ch.
12.24 Diagnostic Register
This register enables the diagnostic modes. See Table 12−17 for a complete description of the register contents. 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
Diagnostic
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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
Diagnostic
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:
Diagnostic
Type:
Read-only, Read/Write
Offset:
90h
Default: 0000 0000h
Table 12−17. Diagnostic Register Description
BIT
SIGNAL
TYPE
FUNCTION
31−17
RSVD
R
Reserved. Bits 31−17 return 0s when read.
16
DIAGNOSTIC
RW
Diagnostic test bit. This test bit shortens the card detect debounce times for simulation and TDL.
15−0
RSVD
R
Reserved. Bits 15−0 return 0s when read.