31.12 Rewriting By Self-Programming; Overview - Renesas RX100 Series User Manual

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31.12 Rewriting by Self-Programming

31.12.1

Overview

The MCU supports rewriting of the flash memory by the user program. The ROM and E2 DataFlash can be rewritten by
preparing a routine to rewrite the flash memory (flash rewrite routine) in the user program.
When rewriting the E2 DataFlash, the BGO can be used to execute the flash rewrite routine on the ROM. The E2
DataFlash can also be rewritten by executing the flash rewrite routine that is transferred on the RAM in advance.
Note 1. The ROM cannot be rewritten by executing the flash rewrite routine on the ROM.
Figure 31.38 Self-Programming Overview
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
Flash rewrite routine
Erase/program
ROM or E2 DataFlash
On-chip RAM or on-chip ROM
Flash information
31. Flash Memory (FLASH)
*1
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