M306H7MG-XXXFP Datasheet, PDF (285/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
17. FLASH MEMORY VERSION
17.5.1 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.
17.5.2 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.
Figure 17.4 shows the FMR0 and FMR1 registers.
Registers FMR0 and FMR1 are shown in Figure 17.4.
Rev.2.10 Oct 25, 2006 Page 285 of 326
REJ03B0152-0210