The RH850/F1KM-S1 is one group of single-chip microcontrollers in the RH850/F1x series which is designed for automotive electrical body applications. While it achieves low power consumption, the internal flash memory ranges from 512KB to 1MB and the package covers a wide range from 48 to 100 pins. Also, a CAN FD interface has been added and the CPU operating frequency operates up to 120MHz.