Renesas R5S72623 Manuel D’Utilisation

 

Section 23   CD-ROM Decoder 

R01UH0134EJ0400  Rev. 4.00  

 

Page 1203 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

6 

 0  R/W 

Reserved 

This bit is always read as 0. The write value should 
always be 0. 

5 MD_AUTO 

0 

R/W 

Automatic 

Mode/Form Detection ON/OFF 

0: OFF 

1: ON 

Detectable formats are Mode 0, Mode 1, Mode 2 (non-
XA), Mode 2 Form 1, and Mode 2 Form 2. If the mode 
and form cannot be detected, the sector is taken to be 
in the same mode and form as the previous sector. If 
the mode and form of the first sector after decoding 
starts is undetectable, the setting of the MD_SEC[2:0] 
bits is used as the initial value. 

4 MD_ 

AUTOS1 

0 

R/W 

Criteria for Mode Determination when MD_AUTO = 1 

0: Mode determination is made only when the sync 

code is detected 

1: Mode determination is always made 

The setting of this bit is valid only when the MD_AUTO 
bit is 1. If the mode cannot be determined, the mode of 
the previous sector is used. When this bit is cleared to 
0, mode determination is made only when the sync 
code is detected for the sector. 

3 MD_ 

AUTOS2 

0 

R/W 

Criteria for Mode 2 Form Determination when 
MD_AUTO = 1 

0: The sector is assumed to be non-XA if the two form 

code bytes in the subheader do not match 

1: No determination of XA or non-XA for the sector. The 

first form byte is regarded as valid. However, the two 
form bytes are compared, and the result is reflected 
in a status bit.  

The setting of this bit is valid only when the MD_AUTO 
bit is 1.