SH7263 Datasheet, PDF (1135/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 21 CD-ROM Decoder (ROM-DEC)
21.3.11 Header/Subheader Validity Check Status Register (CROMST4)
The header/subheader validity check status register (CROMST4) indicates errors relating to the
automatic mode determination or form determination for Mode 2.
Bit: 7
6
5
4
3
2
1
0
NG_MD
NG_
NG_
NG_
NG_
MDCMP1 MDCMP2 MDCMP3 MDCMP4
NG_
MDDEF
NG_
MDTIM1
NG_
MDTIM2
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R
R
Bit Bit Name
Initial
Value R/W Description
7
NG_MD
0
R
Indicates that the sector mode could not be determined
according to the automatic mode determination criteria.
6
NG_MDCMP1 0
R
Indicates a mismatch between the file number bytes
(bytes 16 and 20) during the form determination for
Mode 2.
5
NG_MDCMP2 0
R
Indicates a mismatch between the channel number
bytes (bytes 17 and 21) during the form determination
for Mode 2.
4
NG_MDCMP3 0
R
Indicates a mismatch between the sub-mode bytes
(bytes 18 and 22) during the form determination for
Mode 2.
3
NG_MDCMP4 0
R
Indicates a mismatch between the data-type bytes
(bytes 19 and 23) during the form determination for
Mode 2.
2
NG_MDDEF 0
R
Indicates that the mode and form differ from those of
the previous sector.
1
NG_MDTIM1 0
R
Indicates that the minutes, seconds, or frames (1/75
second) value is out of sequence.
In the continuity check for the next and subsequent
sectors, the updated values will be used.
0
NG_MDTIM2 0
R
Indicates that the minutes, seconds, or frames (1/75
second) value was not a BCD value.
Specifically, this bit means that any half-byte was
beyond the range for BCD (i.e. was A to F), HEAD01
was greater than H’59, or HEAD02 was greater than
H'74.
In the continuity check for the next and subsequent
sectors, interpolated values will be used.
Rev. 2.00 Mar. 14, 2008 Page 1101 of 1824
REJ09B0290-0200