D12320VF25IV Datasheet, PDF (796/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 ROM
Figure 19.13 shows the procedure for executing the program/erase control program when
transferred to on-chip RAM.
Write the transfer program
(and the program/erase control
program if necessary) beforehand
MD2, MD1, MD0 = 110, 111
Reset-start
Transfer program/erase control
program to RAM
Branch to program/erase control
program in RAM area
Execute program/erase control
program (flash memory rewriting)
Branch to flash memory application
program
Note: The watchdog timer should be activated to prevent overprogramming or overerasing
due to program runaway, etc.
Figure 19.13 User Program Mode Execution Procedure
Rev.6.00 Sep. 27, 2007 Page 764 of 1268
REJ09B0220-0600