• 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)
Each block of the user date can be separatelu protected agains programming by setting the block write
protection.
Control memory flags of block 1
• Sync_pattern (Bytes 16..23)
In these 8 bytes any type of data can be stored. If RB1 is enabled, the Sync_pattern is always the firs
information that is transmitted from the transponder.
• Identifier pattern IDE (Bytes 24..27) / PCF7935 /
If the Identifier function is enabled by IDL this 4-byte pattern is transmitted after the power-up sequence. The
IDE pattern is used by the calculation unit during Authentication Mode.
PCF7930/31/35
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