R8C/1A Group, R8C/1B Group 18. Flash Memory
Rev.1.30 Dec 08, 2006 Page 246 of 315
REJ09B0252-0130
Table 18.2 Flash Memory Rewrite Modes
Flash Memory
Rewrite Mode
CPU Rewrite Mode Standard Serial I/O Mode Parallel I/O Mode
Function User ROM area is rewritten by
executing software commands
from the CPU.
EW0 mode: Rewritable in any
area other than
flash memory
EW1 mode: Rewritable in flash
memory
User ROM area is rewritten
by a dedicated serial
programmer.
User ROM area is
rewritten by a
dedicated parallel
programmer.
Areas which can
be rewritten
User ROM area User ROM area User ROM area
Operating mode Single chip mode Boot mode Parallel I/O mode
ROM
programmer
None Serial programmer Parallel programmer
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