H838532H datasheet(156/508 Pages) RENESAS

номер детали	H838532H

подробное описание детали	16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series

PDF	508 Pages

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производитель	RENESAS [Renesas Technology Corp]

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Section 6 ROM

Rev. 1.00 May 30, 2008 Page 136 of 484

REJ09B0436-0100

6.4.2

Programming/Erasing in User Program Mode

The term user mode refers to the status when a user program is being executed. 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 6.3 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 6.5,

Flash Memory Programming/Erasing.

Yes

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

Figure 6.3 Programming/Erasing Flowchart Example in User Program Mode

H838532H датащи(PDF) 156 Page - Renesas Technology Corp