Specifications

Physical Layer Simplified Specification Version 4.10

114

• MDT

The manufacturing date is composed of two hexadecimal digits, one is 8 bits representing the year(y)

and the other is 4 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). This is the checksum of the CID contents computed as described in Chapter

4.5.

5.3 CSD Register

The Card-Specific Data register provides information regarding access to 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 types of the entries in the table below are coded as follows: R = readable,

W(1) = writable once, W = multiple writable.

5.3.1 CSD_STRUCTURE

Field structures of the CSD register are different depend on the Physical Layer Specification Version

and Card Capacity.

The CSD_STRUCTURE field in the CSD register indicates its structure version.

Table 5-3 shows the version number of the related CSD structure.

CSD_STRUCTURE CSD structure version Card Capacity

CSD Version 1.0

Standard Capacity

CSD Version 2.0

High Capacity and Extended Capacity

2-3

reserved

Table 5-3: CSD Register Structure