Renesas SH7264 User Manual

 

Section 23   CD-ROM Decoder 

R01UH0134EJ0400  Rev. 4.00  

 

Page 1231 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

6 

CBUF_EN  0 

R/W 

Buffering to Buffer RAM Enable 

This bit turns on/off buffering in both automatic and 
manual buffering modes. In manual buffering mode, set 
this bit after generation of the ISEC interrupt. This bit is 
automatically reset when automatic buffering stops. 

0: Buffering is OFF 

1: Buffering is ON 

5 

 0  R/W 

Reserved 

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

4, 3 

CBUF_MD 
[1:0] 

00 

R/W 

Start-sector detection mode when the automatic 
buffering function is in use 

00: The header values for the previous and current 

sectors must be in sequence. 

01: The header value detected in the current sector 

must be in sequence with the interpolated value. 

10: A current sector with any header value is OK. 

11: Start-sector detection is based on the interpolated 

value even if the current sector is not detected. 

2 CBUF_TS 

1 

R/W 

CBUFCTL1 

to CBUFCTL3 Setting Mode 

0: CBUFCTL1 to CBUFCTL3: BCD (in decimal) 

1: Total number of sectors (in hexadecimal) 

1 

CBUF_Q 

0 

R/W 

Q-channel code buffering data specification in the case 
of a CRC error in the Q-channel code 

0: The values for the last sector for which the CRC 

returned a correct result are buffered. 

1: The erroneous data is buffered as is. 

Note:  Since subcodes are not input with this LSI, 

always set this bit to 1. 

0 

 0  R/W 

Reserved 

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