Renesas R5F21244SDFP MCU Flash Memory Unlocking is a process to attack microcontroller protective system and copy extracted binary file to microprocessors;
Below Figure is a Memory Map of R8C/24 Group. The R8C/24 group has 1 Mbyte of address space from addresses 00000h to FFFFFh.
The internal ROM is allocated lower addresses, beginning with address 0FFFFh. For example, a 48-Kbyte internal ROM area is allocated addresses 04000h to 0FFFFh.
The fixed interrupt vector table is allocated addresses 0FFDCh to 0FFFFh. They store the starting address of each interrupt routine. The internal RAM is allocated higher addresses, beginning with address 00400h.
For example, a 2-Kbyte internal RAM area is allocated addresses 00400h to 00BFFh. The internal RAM is used not only for storing data but also for calling subroutines and as stacks when interrupt requests are acknowledged which can be used for unlocking renesas mcu r5f21134 flash program.