Transcend Information TS1~2GUSD-S3 manual Crc, CSD Register

TS1~2GUSD-S3 microSD Memory Card + Reader S3

The manufacturing date composed of two hexadecimal digits, one is 8 bit representing the year(y) and the other is four bits representing the month(m).

The “m” field [11:8] is the month code. 1 = January. The “y” field [19:12] is the year code. 0 = 2000.

As an example, the binary value of the Date field for production date “April 2001” will be: 00000001 0100.

•CRC

CRC7 checksum (7 bits).

3. CSD Register

The Card-Specific Data register provides information on how to access the card contents. The CSD defines the data format, error correction type, maximum data access time, whether the DSR register can be used etc. The programmable part of the register (entries marked by W or E, see below) can be changed by CMD27. The type of the entries in the table below is coded as follows: R= readable, W(1) = writable once, W = multiple writable.

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