Hi all. To increase duration of 24xxx functioning inside of PIC system I think I should apply something like Hamming coding . Information block consist of 7 information byte and 1 correcting code byte . I should correct 1-bit error and detect another error situation inside of information block. Would someone like to tell me is any information about Hamming coding theory , with examples how to generate checking tail and further check information block with it , ( maybe CRC or else ) in Internet ? WBR Dmitry. P.S. Thank you for answer .