M16C62_M Datasheet, PDF (243/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

CPU Rewrite Mode (Flash Memory Version)
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(8) Writing in the user ROM area
If power is lost while rewriting blocks that contain the flash rewrite program with the CPU rewrite mode,
those blocks may not be correctly rewritten and it is possible that the flash memory can no longer be
rewritten after that. Therefore, it is recommended to use the standard serial I/O mode or parallel I/O
mode to rewrite these blocks.
(9) Using the lock bit
To use the CPU rewrite mode, use a boot program that can set and cancel the lock command.
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