HD6473032F16 Datasheet, PDF (588/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 18 ROM
State transitions between the normal user mode and on-board programming mode are performed
by changing the FWE pin level from high to low or from low to high. To prevent misoperation
(erroneous programming or erasing) in these cases, the bits in the flash memory control registers
(FLMCR1, FLMCR2) should be cleared to 0 before making such a transition. After the bits are
cleared, a wait time is necessary. Normal operation is not guaranteed if this wait time is
insufficient.
Rev. 3.00 Mar 21, 2006 page 558 of 814
REJ09B0302-0300