Boot Mode - Renesas M16C FAMILY series Hardware Manual

M 1 6 C 2 / 8 G o r u p ( M 1 6 C
Table 18.2 Flash Memory Rewrite Modes Overview
Flash Memory CPU Rewrite Mode
Rewrite Mode
Function Software command execu-
tion by CPU rewrites the user
ROM area.
EW mode 0:
Rewritable in area other
than flash memory
EW mode 1:
Rewritable in flash memory
Areas which User ROM area
can be rewritten
Operation Single chip mode
mode
ROM None
programmer

18.1.1 Boot Mode

The microcomputer enters boot mode when a hardware reset is performed while a high-level ("H") signal
is applied to pins CNV
("L") signal is applied to the P8
The boot ROM area is reserved. The boot ROM area stores the rewrite control program for a standard
serial I/O mode before shipping. Do not rewrite the boot ROM area.
R e . v 2 0 . 0 J a . n 3 , 1 2 0 0 7
R E J 0 9 B 0 0 4 7 0 - 2 0 0
2 / , 8 M 1 6 C 2 / 8 ) B
and P8 or while an "H" signal is applied to pins CNV
SS 6
. A program in the boot ROM area is executed.
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Standard Serial I/O Mode
A dedicated serial programer
rewrites the user ROM area.
Standard serial I/O mode 1:
Clock synchronous serial
I/O
Standard serial I/O mode 2:
UART
User ROM area
Boot mode
Serial programmer
18. Flash Memory Version
Parallel I/O Mode
A dedicated parallel pro-
grammer rewrites the user
ROM area.
User ROM area
Parallel I/O mode
Parallel programmer
and P1 and a low-level
SS 6