RL78/G15 CHAPTER 19 FLASH MEMORY
R01UH0959EJ0110 Rev.1.10 Page 654 of 765
Mar 7, 2023
CHAPTER 19 FLASH MEMORY
The RL78 microcontroller incorporates the flash memory to which a program can be written, erased, and overwritten
while mounted on the board. The flash memory includes the “code flash memory”, in which programs can be executed,
and the “data flash memory”, an area for storing data.
RAM
1 Kbyte
00000H
F0000H
EFFFFH
F0800H
F07FFH
F2000H
F1FFFH
FFEE0H
FFEDFH
FFF00H
FFEFFH
FFFFFH
F9000H
F8FFFH
F9400H
F93FFH
Reserved
09000H
08FFFH
02000H
01FFFH
09400H
093FFH
FFB00H
FFAFFH
Data flash memory
1 Kbyte
Reserved
Special function registers (2nd SFR)
2 Kbytes
Reserved
Mirror area
(data flash 1 Kbyte)
Reserved
General-purpose registers
32 bytes
Special function registers (SFR)
256 bytes
Code flash memory
4 to 8 Kbytes
Mirror area
(code flash 2 to 6 Kbytes)
Table 19-1. Overview of Flash Memory
Flash capacity Code flash: 4 to 8 Kbytes
Data flash: 1 Kbyte
Block size Code flash: 1 Kbyte (blocks 0 to 7)
Data flash: 512 bytes (blocks 0 and 1)
Unit for writing and block erasure [Writing]
Code flash/data flash: 32 bits
[Block erasure]
Code flash: 1 Kbyte
Data flash: 512 bytes
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