Renesas R5F21258SNFP QFP(52) Device

Adapters for Automated Programmers

Adapters for Manual Programmers

Adapters for Engineering Programmers

Last Updated: 05/18/2023

IMPORTANT: R8C/25 Microcomputer Flash Memory Version. This algorithm is written in parallel I/O mode. In the buffer 8K-byte Boot ROM is mapped to 0000h-1FFFh. 2K-byte Data ROM (block A & B) is mapped to 2400h-2BFFh 64K-byte User ROM is mapped to 4000h-13FFFh. The User Boot and Data ROMs are selected in the Configure Options. Buffer locations 2000h-23FFh and 2C00h-3FFFh are not used and should be filled with FFh. Buffer locations FFDCh-FFFFh are special. The last byte of User ROM (address FFFFh) containing code protection bits can be set in Device Configure menu and programmed by enabling Secure command. Config Options allow the individual ROM sections to be selected for device operations. Before executing any command at least 1 Operations Area must be selected. The Boot ROM area of the device has a standard serial I/O mode control program stored in it when shipped from the factory. It is not necessary to program the boot area for normal use the device may fail communication if improper data is programmed into the Boot ROM area.