54 MHz RXv2 core with 384 KB flash
The R5F52317BGFM#30 is a 32-bit single-core MCU from the Renesas RX231 family, built around the RXv2 CPU core running at 54 MHz. It carries 384 KB of program flash, 64 KB of RAM, and 8 KB of data flash that doubles as EEPROM — enough headroom for a mid-range control loop with a communication stack and a few hundred lines of application code.
Connectivity and analog mix
On the communication side the MCU integrates CANbus, USB OTG, I²C, SPI, SCI (UART), IrDA, SSI, and SD/SDIO interfaces — a combination that suits a fieldbus gateway, a sensor aggregator, or a motor-drive control board that needs to talk to both a CAN network and a host PC over USB. The analog front end includes twelve 12-bit ADC channels and two 12-bit DAC outputs, enough to handle multi-phase current sensing or closed-loop control without an external converter. On-chip peripherals cover capacitive touch, DMA, low-voltage detect, POR, PWM, and watchdog timer — the usual set for a self-contained controller that does not rely on external supervisor ICs.
Industrial temperature grade and active lifecycle
Renesas lists the product status as Active, and the device is ROHS3 compliant.