M16C62P_06 Datasheet, PDF (396/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
24. Precautions
24.15.13 DMA transfer
In EW1 mode, make sure that no DMA transfers will occur while the FMR00 bit in the FMR0 register = 0
(during the auto program or auto erase period).
24.15.14 Regarding Programming/Erasing Endurance and Execution Time
As the number of programming/erasure times increases, so does the execution time for software commands
(Program, Block Erase, Erase All Unlock Blocks, and Lock Bit Program). Especially when the number of
programming/erasure times exceeds 1,000, the software command execution time is noticeably extended.
Therefore, the software command wait time that is set must be greater than the maximum rated value of
electrical characteristics.
The software commands are suspended by hardware reset 1, hardware reset 2, NMI interrupt, and watchdog
timer interrupt. If a software command is suspended by such reset or interrupt, the block that was in process
must be erased before reexecuting the suspended command.
Rev.2.41 Jan 10, 2006 Page 381 of 390
REJ09B0185-0241