Waveshare R7FA4 PLUS A Development Board is a compact Renesas RA4M1 development board built around the R7FA4M1AB3CFM microcontroller. It delivers the familiar Arduino UNO R4 Minima compatible form factor while adding a more flexible power design, CAN bus, 12-bit DAC, onboard operational amplifiers, and broader shield expansion capability for embedded control, industrial interface experiments, education, and rapid prototyping. This R7FA4 PLUS A board runs at 48MHz and integrates 256KB Flash plus 32KB RAM, giving developers a practical Renesas platform for learning, testing, and deploying control logic. With 5V / 3.3V selectable output, 6V to 24V DC input, standard Arduino headers, ICSP, SWD indicators, and a side reset button, the board is well suited for sensor expansion, actuator control, shield stacking, and mixed-voltage prototyping. Features Renesas R7FA4M1AB3CFM / RA4M1 MCU with 32-bit Arm Cortex-M4 architecture and 48MHz clock Arduino UNO R4 Minima compatible layout for easier code migration and shield expansion 256KB Flash and 32KB RAM for embedded control, automation logic, and interface experiments Selectable 5V or 3.3V power output for better compatibility with different modules and shields 6V to 24V DC input for more flexible external power design 12-bit DAC, CAN bus, PWM, ADC, UART, I2C, and SPI on one board Low-profile DC jack and side reset button help keep shield stacking more convenient Up to 2000mA 5V output capability for stronger peripheral driving in lab and prototype setups Experimental solder pad area for DIY interfaces and quick hardware expansion Specifications Brand Waveshare Model R7FA4 PLUS A Microcontroller R7FA4M1AB3CFM, Renesas RA4M1, 32-bit Arm Cortex-M4 Clock Frequency 48MHz Memory 256KB Flash, 32KB RAM Wireless None Operating Voltage Selectable 5V / 3.3V Power Input 6V to 24V DC Digital Pins 14 Analog Pins 6 DAC 2 PWM 6 UART 1 I2C 1 SPI 1 CAN 1 5V Power Output Up to 2000mA Max USB USB Type-C Weight 0.047 kg Applications Embedded control development for logic control, timing, and interface testing Industrial communication learning with CAN bus based experiments and controller training Sensor and actuator prototyping with Arduino-compatible shields and module stacks Education and STEM projects for Renesas RA4M1 programming and Arduino migration Mixed-voltage prototyping where 5V and 3.3V peripheral compatibility matters DIY hardware validation using the experimental solder pad area for custom interfaces Packing List R7FA4 PLUS A x1 USB Type-A to Type-C cable x1 Other Content Board hardware overview The R7FA4 PLUS A board includes the R7FA4M1AB3CFM MCU, AMS1117-3.3 regulator, MP8759 5V regulator, Arduino interface, ICSP header, configurable 5V / 3.3V power output header, SWD indicator, power indicator, user LED, USB Type-C programming interface, serial RX/TX indicators, DC input, and reset button. Pinout definition Outline dimensions Shield and module expansion is one of the strongest points of this Waveshare development board. The Arduino-compatible interface, low-profile DC jack, side reset key, and configurable voltage output make the R7FA4 PLUS A easier to integrate with sensor modules, display shields, relay shields, and custom experiment boards during development. Resources Wiki Schematic Renesas RA4M1 Overview RA4M1 Hardware Manual Arduino UNO R4 Minima Documentation Arduino IDE FAQ Is R7FA4 PLUS A compatible with Arduino UNO R4 Minima?Yes. The board is designed around the same R7FA4M1AB3CFM / RA4M1 microcontroller family and uses an Arduino UNO R4 Minima compatible layout, which makes it suitable for Arduino-style development and shield expansion. Does this board include wireless connectivity?No. R7FA4 PLUS A focuses on wired embedded development and does not include onboard Wi-Fi or Bluetooth. What makes R7FA4 PLUS A different from a more basic Arduino-compatible board?This Waveshare board adds CAN bus, 2-channel DAC, flexible 5V / 3.3V power output, up to 2000mA 5V output, wider 6V to 24V input, and a layout that is easier to use with shields and lab expansion.
