Hitachi H8S/2633 Hardware Manual page 801

Flash Memory Emulation in RAM

Emulation should be performed in user mode or user program mode. When the emulation block

set in RAMER is accessed while the emulation function is being executed, data written in the

overlap RAM is read.

Flash memory

Emulation block

Application program

Execution state

Figure 22-3 Reading Overlap RAM Data in User Mode or User Program Mode

When overlap RAM data is confirmed, the RAMS bit is cleared, RAM overlap is released, and

writes should actually be performed to the flash memory.

When the programming control program is transferred to RAM, ensure that the transfer

destination and the overlap RAM do not overlap, as this will cause data in the overlap RAM to

be rewritten.

(emulation is performed

on data written in RAM)