REN_r01an6436ej0100-rh850u2b_APN_20231031.pdf

Application Note

R01AN6436EJ0100 Rev.1.00 Page

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of 15

2023.10.3

RH850/U2B Group

Data Flash Application Note

Summary

This application explains for the on-chipped RH850/U2Bx flash memory rewrite.

The contents of this application note are an example of a user program creation method related to the data flash rewrite.

RH850/U2B Group Data Flash Application Note

R01AN6436EJ0100 Rev.1.00 Page

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of 15

2023.10.3

Contents

1. Introduction ........................................................................................................................................ 3

1.1 Functions ........................................................................................................................................... 3

1.2 Applicable Condition.......................................................................................................................... 3

2. Basic Operation of Data Flash Memory Rewriting ............................................................................ 4

2.1 Flash Memory-Related Modules ....................................................................................................... 4

2.2 Initial Setting for Flash Memory ......................................................................................................... 5

2.3 Block Erasing of Data Flash .............................................................................................................. 6

RH850/U2B Group Data Flash Application Note

R01AN6436EJ0100 Rev.1.00 Page

3

of 15

2023.10.3

1. Introduction

This application note explains the program for the data flash rewrite.

1.1 Functions

 Flash sequencer (Sequencer for flash memory)

 Data flash memory

1.2 Applicable Condition

 Self-programing condition enabling

In this application note, enable the following settings on “Cube Suite+” for rewriting the internal flash ROM.

RH850/U2B Group Data Flash Application Note

R01AN6436EJ0100 Rev.1.00 Page

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of 15

2023.10.3

2. Basic Operation of Data Flash Memory Rewriting

note.

2.1 Flash Memory-Related Modules

Perform the flash memory erasing/rewriting to use the sequencer (flash sequencer) for the flash memory.

are as the basic operation of the data flash memory rewriting. For the other functions, refer to the related manuals,