SH7261 datasheet(1012/1348 Pages) RENESAS

1012 / 1348 page

Section 21 CD-ROM Decoder (ROM-DEC)

Rev. 2.00 Sep. 07, 2007 Page 980 of 1312

REJ09B0320-0200

21.3.41

Automatic Buffering Setting Control Register (CBUFCTL0)

76543210

Bit:

Initial value:

R/W:

00000100

R/W

CBUF_

AUT

CBUF_

LINK

CBUF_MD[1:0]

CBUF_

—

Bit

Bit Name

Initial

Value

R/W

Description

CBUF_AUT

R/W

Automatic Buffering Function ON/OFF Control

When this bit is to be set or cleared while CROM_EN =

1, CBUF_EN should also be set or cleared

simultaneously. Otherwise, the validity of the status

indications in CBUFST0, CBUFST1 and CBUFST2

cannot be guaranteed.

0: Automatic buffering is OFF

1: Automatic buffering is ON

CBUF_EN

R/W

Buffering to Buffer RAM Control

This bit turns buffering in both automatic and manual

buffering modes on and off. 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

CBUF_LINK

R/W

Buffering Control on Link Block Detection

0: Allocates area for seven sectors

1: Data are buffered, skipping the link block

4, 3

CBUF_MD

[1:0]

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.

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