8.1 OHCI Version Register

The OHCI version register indicates the OHCI version support and whether or not the serial EEPROM is present. See Table 8−2 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

 

 

 

 

 

 

 

OHCI version

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

R

R

R

R

R

R

R

RU

R

R

R

R

R

R

R

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default

0

0

0

0

0

0

0

X

0

0

0

0

0

0

0

1

Bit

15

 

14

13

12

 

11

10

9

8

7

6

5

4

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Name

 

 

 

 

 

 

 

 

 

OHCI version

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

1

0

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Register:

OHCI version

 

 

 

 

 

 

 

 

 

 

 

 

Offset:

 

00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type:

 

Read-only

 

 

 

 

 

 

 

 

 

 

 

 

 

Default:

 

0X01 0010h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 8−2. OHCI Version Register Description

BIT

FIELD NAME

TYPE

 

DESCRIPTION

 

 

 

 

 

31−25

RSVD

R

 

Reserved. Bits 31−25 return 0s when read.

 

 

 

 

 

24 ‡

GUID_ROM

RU

 

The PCI7x21/PCI7x11 controller sets bit 24 to 1 if the serial EEPROM is detected. If the serial

 

 

 

 

EEPROM is present, then the Bus_Info_Block is automatically loaded on system (hardware) reset.

 

 

 

 

The default value for this bit is 0.

 

 

 

 

 

23−16

version

R

 

Major version of the OHCI. The PCI7x21/PCI7x11 controller is compliant with the 1394 Open Host

 

 

 

 

Controller Interface Specification (Release 1.1); thus, this field reads 01h.

 

 

 

 

 

15−8

RSVD

R

 

Reserved. Bits 15−8 return 0s when read.

 

 

 

 

 

7−0

revision

R

 

Minor version of the OHCI. The PCI7x21/PCI7x11 controller is compliant with the 1394 Open Host

 

 

 

 

Controller Interface Specification (Release 1.1); thus, this field reads 10h.

 

 

 

 

 

This bit is cleared only by the assertion of GRST.

8−4

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Texas Instruments PCI7411, PCI7611, PCI7621, PCI7421 manual Ohci version, 2. Ohci Version Register Description