Key benefits and features Convenient power rails The board brings out 5V, 3.3V and GND pins to a dedicated pinout, making it easy to supply power for extended experiments and custom test setups. Fully accessible IO All microcontroller IO pins are routed to two labeled rows on the core board, providing clear access and reducing wiring errors during prototyping. Flexible power options Power the core board via USB power supply, an external 5V power source, enabling multiple development and testing configurations. Flexible clock options The board uses a 22.1184 MHz external crystal oscillator, while users can also utilize the microcontroller's internal oscillator or the external oscillator as needed for timing and compatibility. Use scenarios Rapid prototyping and testing Connect sensors and peripherals to the labeled IO rows, power from USB or an external supply, and program or test firmware as required. Educational labs and handson learning Clear voltage rails and labeled IO pins support structured microcontroller experiments, helping students understand hardware connections and timing. Embedded project development and debugging Use the JTAG downloader for programming and debugging, with the option to choose between internal and external clock sources to fit development tools and project needs.