SanDisk SD032 Manual descarregar pdf (Página 46)

COPY—This bit marks the card as an original (‘0’) or non-original (‘1’). Once set to non-original, this bit cannot

be reset to original. The definition of “original” and “non-original” is application dependent and changes no card

characteristics.

PERM_WRITE_PROTECT—Permanently protects the whole card content, except the secured protected area,

against overwriting or erasing (all write and erase commands for this card are permanently disabled). The default

value is ‘0’, i.e., not permanently write protected.

TMP_WRITE_PROTECT—Temporarily protects the whole card content, except the secured protected area, from

being overwritten or erased (all write and erase commands for this card are temporarily disabled). This bit can be set

and reset. The default value is ‘0’, i.e., not write protected.

FILE_FORMAT—Indicates the file format on the card. This field is read-only for ROM. The following formats

are defined.

Table 3-21. File Format

FILE_FORMAT_GRP FILE_FORMAT Type

0 0 Hard disk-like file system with partition table

0 1 DOS FAT (floppy-like) with boot sector only (no partition table)

0 2 Universal File Format

0 3 Others/Unknown

1 0, 1, 2, 3 Reserved

CRC—The CRC field carries the check sum for the CSD contents. The checksum has to be recalculated by the host

for any CSD modification. The default corresponds to the initial CSD contents.

3.5.4. SCR Register

In addition to the CSD register, there is the MINI SD Configuration Register (SCR). This register provides

information on miniSD Card's special features that were configured into the given card. The size of SCR register is

64 bit. This register shall be set in the factory by the miniSD Card manufacturer. Table 3-22 describes the SCR

Table 3-22. SCR Fields

Description Field Width Cell Type SCR Slice SCR Value SCR Code

SCR Structure SCR_STRUCTURE 4 R [63:60] V1.0 0

miniSD Card—Spec. Version SD_SPEC 4 R [59:56]

V1.01

data_status_after erases DATA_STAT_AFTER_ERASE 1 R [55:55] 0 0

SD Security Support SD_SECURITY 3 R [54:52]

Prot 2, Spec V1.01

DAT Bus widths supported SD_BUS_WIDTHS 4 R [51:48] 1 & 4 5

Reserved - 16 R [47:32] 0 0

Reserved for manufacturer usage - 32 R [31:0] 0 0

SCR_STRUCTURE—Version number of the related SCR structure in the miniSD Card Physical Layer

Specification.

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 113 114

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SanDisk SD032 Manual Página 46