Hitachi H8/3692 ユーザーズマニュアル

Rev. 71, 07/01, page 89 of 372

On-board programming/erasing of an individual flash memory block can also be performed in user
program mode by branching to a user program/erase control program. The user must set branching
conditions and provide on-board means of supplying programming data. The flash memory must
contain the user program/erase control program or a program that provides the user program/erase
control program from external memory. As the flash memory itself cannot be read during
programming/erasing, transfer the user program/erase control program to on-chip RAM, as in boot
mode. Figure 7-2 shows a sample procedure for programming/erasing in user program mode.
Prepare a user program/erase control program in accordance with the description in section 7.5,
Flash Memory Programming/Erasing.

Yes

No

Program/erase?

Transfer user program/erase control 

program to RAM

Reset-start

Branch to user program/erase control

program in RAM

Execute user program/erase control

program (flash memory rewrite)

Branch to flash memory application

program

Branch to flash memory application

program