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Section 23 CD-ROM Decoder
R01UH0134EJ0400 Rev. 4.00 Page 1251 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
The meanings of bits in the two-byte status field shown in figure 23.15 are given below. The
values of the non-assigned bits are undefined.
Status
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PERR QERR EDCE — — — — — SD SY FM[2:0] HD — —
[Legend]
PERR: Indicates that a P-parity error remains.
QERR: Indicates that a Q-parity error remains.
EDCE: Indicates that a remaining error was detected in post-correction EDC checking.
SD: Indicates that a short sector was encountered
SY: Indicates that a sync code was interpolated.
FM: Indicates the data format
001: Mode 0
010: Mode 1
011: Long (format with no EDC and ECC)
100: Mode 2 (non-XA)
101: Mode 2 Form 1
110: Mode 2 Form 2
HD: Header continuity (minutes, seconds, and frames (1/75) are non-sequential)
The value of the storage flag field in figure 23.15 is incremented every time the data for one sector
are output. The value starts at H'0000 and wraps back around to H'0000 after incrementation
reaches H'FFFF. Note that the upper byte and lower byte in the storage flag are swapped.