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MC68HC908GR60A security field values restriction?

Question asked by Jozef Prokopovic on Jul 16, 2015
Latest reply on Jul 20, 2015 by Jozef Prokopovic


I am trying to program the address 0xFFF6-FFFD with values 0x00. But after programming and verifying the flash memory the MCU seems to be secured.
Read values are 0xAF. Is it possible to program all security bytes with 0x00?
Is there any restriction which value should or should not be at 0xFFF6-FFFD?
When I program random data at 0xFFF6-FFFD then the verify is OK.