Datasheet

RL78/L12 CHAPTER 27 ON-CHIP DEBUG FUNCTION
R01UH0330EJ0200 Rev.2.00 828
Dec 13, 2013
27.2 On-Chip Debug Security ID
The RL78 microcontroller has an on-chip debug operation control bit in the flash memory at 000C3H (see CHAPTER
25 OPTION BYTE) and an on-chip debug security ID setting area at 000C4H to 000CDH, to prevent third parties from
reading memory content.
Table 27-1. On-Chip Debug Security ID
Address On-Chip Debug Security ID
000C4H to 000CDH Any ID code of 10 bytes
27.3 Securing of User Resources
To perform communication between the RL78 microcontroller and E1 on-chip debugging emulator, as well as each
debug function, the securing of memory space must be done beforehand.
If Renesas Electronics assembler or compiler is used, the items can be set by using linker options.
(1) Securement of memory space
The shaded portions in Figure 27-2 are the areas reserved for placing the debug monitor program, so user
programs or data cannot be allocated in these spaces. When using the on-chip debug function, these spaces must
be secured so as not to be used by the user program. Moreover, this area must not be rewritten by the user
program.