ATmega4809 Curiosity Nano features an onboard debugger that can be used to program and debug the ATmega4809 using UPDI. The onboard debugger also includes a Virtual Com port interface over UART and DGI GPIO. Atmel Studio/Microchip MPLAB® X can be used as a front-end for the onboard debugger for programming and debugging. Data Visualizer can be used as a front-end for the CDC and DGI GPIO.