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Section 23 CD-ROM Decoder
R01UH0134EJ0400 Rev. 4.00 Page 1221 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
23.3.22 Pre-ECC Correction Subheader: Channel Number (Byte 17) Data Register
(SHEAD01)
The pre-ECC correction subheader: channel number (byte 17) data register (SHEAD01) indicates
the channel number value in the subheader before ECC correction (byte 17).
76543210
00000000
RRRRRRRR
Bit:
Initial value:
R/W:
SHEAD01[7:0]
Bit Bit Name
Initial
Value R/W Description
7 to 0 SHEAD01
[7:0]
All 0 R Indicate channel number value in the subheader before
ECC correction (byte 17).
For sectors not in Mode 2, this register contains the
byte of data at the corresponding position.
23.3.23 Pre-ECC Correction Subheader: Sub-Mode (Byte 18) Data Register (SHEAD02)
The pre-ECC correction subheader: sub-mode (byte 18) data register (SHEAD02) indicates the
sub-mode value in the subheader before ECC correction (byte 18).
76543210
00000000
RRRRRRRR
Bit:
Initial value:
R/W:
SHEAD02[7:0]
Bit Bit Name
Initial
Value R/W Description
7 to 0 SHEAD02
[7:0]
All 0 R Indicate sub-mode value in the subheader before ECC
correction (byte 18).
For sectors not in Mode 2, this register contains the
byte of data at the corresponding position.