HD6432633 Datasheet, PDF (987/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

22.8.3 Error Protection
In error protection, an error is detected when H8S/2633 Series runaway occurs during flash
memory programming/erasing, or operation is not performed in accordance with the
program/erase algorithm, and the program/erase operation is aborted. Aborting the program/erase
operation prevents damage to the flash memory due to overprogramming or overerasing.
If the H8S/2633 Series malfunctions during flash memory programming/erasing, the FLER bit is
set to 1 in FLMCR2 and the error protection state is entered. The FLMCR1, FLMCR2, EBR1, and
EBR2 settings are retained, but program mode or erase mode is aborted at the point at which the
error occurred. Program mode or erase mode cannot be re-entered by re-setting the P1 or E1 bit.
However, PV1 and EV1 bit setting is enabled, and a transition can be made to verify mode.
FLER bit setting conditions are as follows:
1. When the flash memory of the relevant address area is read during programming/erasing
(including vector read and instruction fetch)
2. Immediately after exception handling (excluding a reset) during programming/erasing
3. When a SLEEP instruction (including software standby) is executed during
programming/erasing
4. When the CPU releases the bus to the DTC
Error protection is released only by a power-on reset and in hardware standby mode.
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