/* check, if the EEprom is programmed:
* - The Prefix(Byte 0,1,2) is equal to "ATR"
* - The checksum, stored in the last 2 Bytes, is correct
*/
/* check, if the EEprom is programmed:
* - The Prefix(Byte 0,1,2) is equal to "ATR"
* - The checksum, stored in the last 2 Bytes, is correct
*/