PCF7931 PDF File ( Datasheet )

PCF7930, 31, 35 Memory organisation Memory structure Control memory flags of block 0 Password (Bytes 0..6) The password is 56 bits long. If the pasword function has been ativated by the PAC flag, the pattern being written in this area must be transmitted by the base station with every program command. PCF7930, 31, 35 1 Password Active Flag PAC (Byte 7) If PAC flag = 1 , date send to the transponder is checked for correctness of the password. Block write Protection BWP (Byte 8) Eac