SH7147 Datasheet, PDF (872/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 20 Flash Memory
3. Since the stack area is used in the erasing program, a stack area of maximum 128 bytes
must be reserved in RAM.
(3.4) The return value in the erasing program, FPFR (general register R0) is checked.
(3.5) Determine whether erasure of the necessary blocks has finished.
If more than one block is to be erased, update the FEBS parameter and repeat steps (3.2) to
(3.5). Blocks that have already been erased can be erased again.
(3.6) After erasure finishes, clear FKEY and specify software protection.
If this LSI is restarted by a power-on reset immediately after user MAT erasing has finished,
secure a reset period (period of RES = 0) that is at least as long as the normal 100 μs.
Rev. 3.00 Oct. 06, 2008 Page 848 of 1080
REJ09B0230-0300