Features:
1) Up to 4GB of data storage 
2) SD Card protocol compatible and supports SPI Mode 
3) Targeted for portable and stationary applications for secured 
    (copyright protected)and non-secured data storage 
4) Voltage range: Basic communication (CMD0, CMD15, CMD55, ACMD41): 
    2.0-3.6V; Other commands and memory access: 2.7 - 3.6V
5) Variable clock rate 0-25 MHz 
6) Up to 12.5MB/sec data transfer rate (using 4 parallel data lines) 
7) Correction of memory field errors 
8) Copyright protection mechanism: complies with highest security of SMDI standard
9) Password protection of cards (not on all models) 
10) Write protect feature using mechanical switch 
11) Built-in write protection features (permanent and temporary) 
12) Card detection (Insertion/Removal) 
13) Application specific commands 
14) Comfortable erase mechanism