Memory of programs and memory of data are programmed on one by delivery of the address and data in team of record. Before record of new data in memory cell EEPROM before record of new data are automatically erased. To define time when it is possible to write down the following byte, confirmation of data is used. At record of previously erased chip it is not obligatory to write down cells the containing FFh.
At a parcel of team of permission of programming, the second byte of sequence (53h) will be returned at a parcel of the third byte. Anyway, all four bytes of team have to be sent. If the number 53h is not received back, give a impulse on SCK and repeat team of permission of a. If after 32 attempts the number 53h is not received, the chip is faulty.