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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
.