R8C32A Datasheet, PDF (508/603 Pages) Renesas Technology Corp – MCU M16C FAMILY / R8C/Tiny SERIES

Under development ^{Preliminary specification}
Specifications in this manual are tentative and subject to change.
R8C/32A Group
30. Flash Memory
30.3 Functions to Prevent Flash Memory from being Rewritten
Standard serial I/O mode has an ID code check function, and parallel I/O mode has a ROM code protect function to
prevent the flash memory from being read or rewritten easily.
30.3.1 ID Code Check Function
The ID code check function is used in standard serial I/O mode. Unless 3 bytes (addresses 0FFFCh to 0FFFEh)
of the reset vector are set to FFFFFFh, the ID codes sent from the serial programmer or the on-chip debugging
emulator and the 7-byte ID codes written in the flash memory are checked to see if they match. If the ID codes
do not match, the commands sent from the serial programmer or the on-chip debugging emulator are not
accepted. For details of the ID code check function, refer to 12. ID Code Areas.
REJ09B0458-0010 Rev.0.10 Apr 01, 2008
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