HB28K032MM3 Datasheet, PDF (22/91 Pages) Renesas Technology Corp – MultiMediaCard 32 MByte/64 MByte/128 MByte/256 MByte/512 MByte

HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
• ECC
Defines the ECC code that was used for storing data on the card. This field is used by the host (or
application) to decode the user data. The following table defines the field format.
ECC
ECC
0
1
2−3
ECC type
None (default)
BCH (542,512)
Reserved
Maximum number of correctable bits
None
3

The content provider or customer defines which kind of error correction may be used to protect the
contents of the MultiMediaCard. This value is programmable.
• CRC7
The CRC7 contains the check sum for the CSD content. The check sum is computed according to chapter
“Cyclic Redundancy Check (CRC)”.
The user has to recalculate a new CRC7 after defining a new CSD.
Rev.0.02, Sep.15.2004, page 22 of 89