Active production, 54 MHz RXv2 core
The R5F52315AGFL#10 is an active-production 32-bit MCU from the Renesas RX231 series, built around the RXv2 core clocked at 54 MHz. That 54 MHz is the rated speed — the actual instruction throughput depends on flash wait states and bus arbitration, but for a general-purpose control MCU in this class, it handles sensor polling, comms stacks, and real-time loops without breaking a sweat.
On-chip memory: flash, RAM, and dedicated EEPROM
128 KB of program flash (128K x 8) plus 32 KB of SRAM (32K x 8) and a separate 8 KB EEPROM block. The dedicated EEPROM is handy for calibration constants, boot parameters, or small data logs that need endurance without wearing the main flash — each EEPROM cell typically handles 100k write cycles, so field-updatable parameters are viable over the product lifetime. The 48-LQFP package (7x7 mm body) is hand-solderable with a standard iron — no hot-air station needed for rework. That matters when you are swapping one on a bench or in a field-service kit. The 30 I/O lines give enough headroom for a small HMI, a sensor hub, or a motor-control interface without running out of pins.
Industrial temp grade and peripheral mix
On-chip peripherals include capacitive touch sensing (no external touch controller needed for membrane-replacement interfaces), DMA, LVD, POR, PWM, and WDT. Connectivity covers I²C, SCI (UART), SPI, SSI, IrDA, and USB OTG — enough for a fieldbus gateway, a data logger with USB download, or a sensor hub aggregating multiple digital buses. The 8-channel 12-bit ADC is the analog front-end for current-sense resistors, thermistors, or potentiometer inputs — typical for a motor-drive or battery-charger control loop.
Compliance and sourcing posture
No stock-holding claim; each lot is traceable and ROHS3-verified.