The Arduino UNO R4 Minima is a high-performance development board based on the Renesas RA4M1 microcontroller. It uses a 32-bit Arm Cortex-M4 core with a clock speed of up to 48MHz, and is equipped with 256KB Flash and 32KB SRAM. Compared with the Arduino UNO R3, it offers stronger processing performance, larger storage space, and richer peripheral resources, while retaining the classic UNO board form factor, pin layout, and 5V operating voltage, making it compatible with existing UNO expansion boards and hardware accessories.

Onboard USB-C programming interface, providing 14 digital I/O pins, 6 analog inputs, and 6 PWM outputs, with integrated 12-bit DAC, CAN bus, and operational amplifier (OP AMP), supporting communication interfaces such as UART, I2C, and SPI, and also providing an SWD debug interface and USB HID function. Supports a wide VIN input range of 6–24V, suitable for applications such as electronic prototyping, sensor data acquisition, motor control, automation control, and Arduino teaching.

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