Short for
Secure Digital High Capacity, SDHC is
a type of
flash memory card based on the SDA
2.00 specification. The SDA 2.00 specification enables
SD
cards to reach higher capacities from 4
GB to
32GB, and growing. SDHC uses a new technology, and as such these cards are not
backwards compatible with SD format devices. SDHC uses a defined 3 speed class
system to help consumers with the different data transfer speed (DTS) and
performance minimum requirements;
- Class 2: minimum sustained DTS of 2MB/sec
- Class 4: minimum sustained DTS of 4MB/sec
- Class 6: minimum sustained DTS of 6MB/sec
The SD Specification Version 2.0 for the SDHC memory card was established by
the SD Card Association (SDA).