53.8 Programming and Debug Ports

For programming and debugging the SAM C20/C21 device, it must be connected using the Serial Wire Debug (SWD) interface. Currently the SWD interface is supported by several Microchip and third party programmers and debuggers, such as SAM-ICE and JTAGICE3.

Refer to the SAM-ICE and JTAGICE3 user’s guides for details on debugging and programming connections and options. For connecting to any other programming or debugging tool, refer to the specific programmer or debugger user’s guide.

A pull-up resistor on the SWCLK pin is critical for reliable operations. Refer to related link for additional information.