7.12 Subsystem Identification Register

The subsystem identification register is used for system and option card identification purposes. This register can be initialized from the serial EEPROM or programmed via the subsystem access register at offset F8h in the PCI configuration space (see Section 7.25). See Table 7−10 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 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

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:

 

2Ch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type:

 

Read/Update

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default:

0000 0000h

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 7−10. Subsystem Identification Register Description

BIT

FIELD NAME

TYPE

DESCRIPTION

 

 

 

 

31−16 ‡

OHCI_SSID

RU

Subsystem device ID. This field indicates the subsystem device ID.

 

 

 

 

15−0 ‡

OHCI_SSVID

RU

Subsystem vendor ID. This field indicates the subsystem vendor ID.

 

 

 

 

These bits are cleared only by the assertion of GRST.

7.13 Power Management Capabilities Pointer Register

The power management capabilities pointer register provides a pointer into the PCI configuration header where the power-management register block resides. The PCI7x21/PCI7x11 configuration header doublewords at offsets 44h and 48h provide the power-management registers. This register is read-only and returns 44h when read.

Bit

7

6

5

 

4

 

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

Name

 

 

 

Power management capabilities pointer

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

R

R

R

 

R

 

R

 

R

R

R

 

 

 

 

 

 

 

 

 

 

 

 

Default

0

1

0

 

0

 

0

 

1

0

0

 

 

 

 

 

 

 

 

 

 

 

 

Register:

Power management capabilities pointer

 

 

 

 

 

 

Offset:

34h

 

 

 

 

 

 

 

 

 

 

Type:

Read-only

 

 

 

 

 

 

 

 

 

 

Default:

44h

 

 

 

 

 

 

 

 

 

7−9

Page 169
Image 169
Texas Instruments PCI7611, PCI7411 manual Subsystem Identification Register, Power Management Capabilities Pointer Register