Hi none answer in this thread. Many people asking about d&m firmware writer also denon support dont wana help. I've try program my r5F56108 mcu with Renesas write utility via rs232 and binaries from denon site but without success (mcu chip correctly detected). I looked into main.bin and I almost sure there is an additional header, also payload data is encrypted, possible aes ecb so there is no chance to write them directly. If anyone could provide raw binary for r5f56108(for any denon device AVR-XYYYY series or similar) mcu it might help many people. R5F56108 chip has 3 flash area: User Bootloder 32KB, Code area 2MB, user data 32KB I am not sure but there is an option to program only bootloader part. Anyone know is it possible to program blank r5F56108 unit from DM860 ?