For programming and/or debugging the SAM C20 the device should be connected using the Serial Wire Debug (SWD) interface. Currently the SWD interface is supported by several Atmel and third party programmers and debuggers, like the SAM-ICE, JTAGICE3 or SAM C21 Xplained Pro (SAM C21 evaluation kit) Embedded Debugger.
Refer to the SAM-ICE, JTAGICE3 or SAM C21 Xplained Pro user guides for details on debugging and programming connections and options. For connecting to any other programming or debugging tool, refer to that specific programmer or debugger’s user guide.
The SAM C21 Xplained Pro evaluation board for the SAM C20 supports programming and debugging through the onboard embedded debugger so no external programmer or debugger is needed.
Note that a pull-up resistor on the SWCLK pin is critical for reliable operations. Refer to related link for more information.
| Pin Name | Description | Recommended Pin Connection |
|---|---|---|
| SWCLK | Serial wire clock pin | Pull-up resistor 1kΩ |