1 ohci version register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 184
8−4
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.