The R4F20203NFD#20 is a part of Renesas' RL78/G13 microcontroller family. It is a 32-bit ARM Cortex-M0+ based MCU. The R4F20203NFD#20 has a maximum operating frequency of 20.0 MHz, 2 KB of EEPROM and 32 KB of embedded FRAM. It also integrates 4 timers, 10-bit ADC, 10-bit DAC, 12-bit width PWM, 8 interrupt sources, full duplex LIN, embedded Op-Amp, and an LPT (Low Power Timer). It also has an integrated USB 2.0 Full-Speed Device Controller, supporting device-side applications, as well as being compatible with I2C, SECT, SPI, UART, MWET, and SCI protocols. The R4F20203NFD#20 has an operational voltage range of 2.7V to 5.5V, and an ambient temperature range of -40 to 85°C.