thanks smith for the datasheet,but still i am facing problem,how to start with.there are two registers,one is device configuration register and other is access register,i am not getting what to write first.there are seperate read and write commands.so every time i write to the card i need to give this command,addrs of zone and data,plz help giving me a flow chart or algorithm for just writing to zone1 without any authentication or password.

regards
nafis