Renesas M16C/60 Series Hardware Manual page 277

Under development
This document is under development and its contents are subject to change.
M16C/6N5 Group
• EW0 Mode
The microcomputer is placed in CPU rewrite mode by setting the FMR0 register's FMR01 bit to "1" (CPU
rewrite mode enabled), ready to accept commands. In this case, because the FMR1 register's FMR11 bit
= 0, EW0 mode is selected. The FMR01 bit can be set to "1" by writing "0" and then "1" in succession.
Use software commands to control program and erase operations. Read the FMR0 register or status
register to check the status of program or erase operation at completion.
• EW1 Mode
EW1 mode is selected by setting FMR11 bit to "1" (by writing "0" and then "1" in succession) after setting
the FMR01 bit to "1" (by writing "0" and then "1" in succession).
Read the FMR0 register to check the status of program or erase operation at completion. The status
register cannot be read during EW1 mode.
Rev.1.00 2003.05.30 page 263
Flash Memory