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23 subsystem id alias register, 24 class code alias register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual

Page 286

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13−14

13.23 Subsystem ID Alias 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 13−14 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 ID alias

Type

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

Default

1

0

0

0

0

0

0

0

0

0

1

1

0

1

0

1

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Name

Subsystem ID alias

Type

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

Default

0

0

0

1

0

0

0

0

0

1

0

0

1

1

0

0

Register:

Subsystem ID alias

Offset:

50h

Type:

Read/Write (EEPROM, GRST only)

Default:

8035 104Ch

Table 13−14. Subsystem ID Alias 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.

13.24 Class Code Alias Register

This register is alias of the class code. Not like original register, this register is read/write and loadable from EEPROM.

Bit

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

Name

Class code alias

Type

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

Default

0

0

0

0

0

1

1

1

1

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

Class code alias

Type

RW

RW

RW

RW

RW

RW

RW

RW

RW

RW

R

R

R

R

R

R

Default

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Register:

Class code alias

Offset:

54h

Type:

Read-only, Read/Write (EEPROM, GRST only)

Default: 0780 0000h