During the flow of program verification mode FF is dummy written into verification addresses. Is there a way to retrieve verification address data without writing to FF?
No, there is no way to retrieve verification address data without dummy writing. Because Flash writing/erasing/verification/etc. requires high voltage, the CPU cannot directly access internal Flash memory. Therefore, an internal buffer is used as an intermediary to implement data verification. Since the purpose of dummy write is to latch to the starting address of the verification addresses stored in the Flash module, strictly speaking H'FF is not essential. Consequently, please be advised that normal operation is not possible even when attempting to read verification data directly from the CPU.
|H8S/2630, 2639, 2638, 2636, 2635|
|H8S/2472, 2463, 2462|
|H8S/2258, 2239, 2238, 2237, 2227|