SH7261 datasheet(987/1348 Pages) RENESAS

987 / 1348 page

Section 21 CD-ROM Decoder (ROM-DEC)

Rev. 2.00 Sep. 07, 2007 Page 955 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

MD_AUTOS1

R/W

Criteria for Mode Determination when MD_AUTO = 1

0: Mode determination is done when the sync code is

detected

1: Mode determination is always done

This bit is only valid when MD_AUTO = 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 only done when the sync code is

detected for the sector.

MD_AUTOS2

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.

This bit is only valid when MD_AUTO = 1.

2 to 0

MD_SEC[2:0]

010

R/W

Sector Type

000: Setting prohibited

001: Mode 0

010: Mode 1

011: Long (Mode 0, Mode 1, or Mode 2 with no

EDC/ECC data)

100: Setting prohibited

101: Mode 2 Form 1

110: Mode 2 Form 2

111: Mode 2 with automatic form detection

If the form cannot be determined when set to B'111, it is

processed as Mode 2 not XA.

Note:

The setting of this register is reapplied on each sector-to-sector transition.

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