SAM L22 Xplained Pro has a 10-pin 50-mil Cortex® Debug Connector that can be used to attach external debuggers to the ATSAML22N18A.
| Cortex Debug Connector pin | Pin / Net | Function | Shared functionality |
|---|---|---|---|
| 1 | VCC_TARGET_P3V3 | ATSAML22N18A voltage | |
| 2 | PA31 | SWD data signal | EDBG SWD |
| 3 | GND | Ground | |
| 4 | PA30 | SWD clock signal | EDBG SWD |
| 5 | GND | Ground | |
| 6 | - | - | |
| 7 | - | - | |
| 8 | - | - | |
| 9 | GND | Ground | |
| 10 | RESETN | Target reset signal | Shield, Shield2, and EDBG |