Embedded Debugger Implementation

SAM L21 Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and debug the ATSAML21J18B using Serial Wire Debug (SWD). The Embedded Debugger also include a Virtual Com port interface over UART, an Atmel Data Gateway Interface over SPI, and TWI and it includes four of the SAM L21 GPIOs. Atmel Studio can be used as a front end for the Embedded Debugger.