Datasheet
XIO2213B
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SCPS210F –OCTOBER 2008–REVISED MAY 2013
8.17 Self-ID Buffer Pointer Register
The self-ID buffer pointer register points to the 2K-byte-aligned base address of the buffer in host memory
where the self-ID packets are stored during bus initialization. Bits 31-11 are read/write accessible. Bits 10-
0 are reserved and return 000 0000 0000b when read.
OHCI register offset: 64h
Register type: Read/Write, Read only
Default value: XXXX XX00h
BIT NUMBER 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RESET STATE X X X X X X X X X X X X X X X X
BIT NUMBER 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RESET STATE X X X X X 0 0 0 0 0 0 0 0 0 0 0
8.18 Self-ID Count Register
The self-ID count register keeps a count of the number of times the bus self-ID process has occurred,
flags self-ID packet errors, and keeps a count of the self-ID data in the self-ID buffer. See Table 8-12 for a
complete description of the register contents.
OHCI register offset: 68h
Register type: Read/Update, Read only
Default value: X0XX 0000h
BIT NUMBER 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RESET STATE X 0 0 0 0 0 0 0 X X X X X X X X
BIT NUMBER 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RESET STATE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Table 8-12. Self-ID Count Register Description
BIT FIELD NAME TYPE Description
31 selfIDError RU Self-ID error. When bit 31 is set to 1b, an error was detected during the most recent self-ID
packet reception. The contents of the self-ID buffer are undefined. This bit is cleared after a
self-ID reception in which no errors are detected. Note that an error can be a hardware error or
a host bus write error.
30-24 RSVD R Reserved. Bits 30-24 return 000 0000b when read.
23-16 selfIDGeneration RU Self-ID generation. The value in this field increments each time a bus reset is detected. This
field rolls over to 0 after reaching 255.
15-11 RSVD R Reserved. Bits 15-11 return 00000b when read.
10-2 selfIDSize RU Self-ID size. This field indicates the number of quadlets that have been written into the self-ID
buffer for the current bits 23-16 (selfIDGeneration field). This includes the header quadlet and
the self-ID data. This field is cleared to 0 0000 0000b when the self-ID reception begins.
1-0 RSVD R Reserved. Bits 1 and 0 return 00b when read.
Copyright © 2008–2013, Texas Instruments Incorporated 1394 OHCI Memory-Mapped Register Space 145
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