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Section 23 CD-ROM Decoder
Page 1224 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
23.3.28 Pre-ECC Correction Subheader: Data Type (Byte 23) Data Register (SHEAD07)
The pre-ECC correction subheader: data type (byte 23) data register (SHEAD07) indicates the
data type value in the subheader before ECC correction (byte 23).
76543210
00000000
RRRRRRRR
Bit:
Initial value:
R/W:
SHEAD07[7:0]
Bit Bit Name
Initial
Value R/W Description
7 to 0 SHEAD07
[7:0]
All 0 R Data Type Value in Subheader Before ECC Correction
(Byte 23)
For sectors not in Mode 2, this register contains the
byte of data at the corresponding position.
23.3.29 Post-ECC Correction Header: Minutes Data Register (HEAD20)
The post-ECC correction header: minutes data register (HEAD20) indicates the minutes value in
the header after ECC correction.
76543210
00000000
RRRRRRRR
Bit:
Initial value:
R/W:
HEAD20[7:0]
Bit Bit Name
Initial
Value R/W Description
7 to 0 HEAD20
[7:0]
All 0 R Minutes Value in Header After ECC Correction
When MSF_LBA_SEL = 1, this register indicates the
first byte of the total number of sectors calculated from
M, S, and F.