4.2.2 UPDI Debug Connector
ATtiny3217 Xplained Pro has a 10-pin 50-mil UPDI Debug Connector that can be used to attach external debuggers to the ATtiny3217.
| UPDI Debug Connector Pin | Pin/Net | Function | Shared Functionality |
|---|---|---|---|
| 1 | - | - | |
| 2 | GND | Ground | |
| 3 | PA0 | UPDI/RESET | EDBG |
| 4 | VCC_TARGET_P3V3 | ATtiny3217 voltage | |
| 5 | - | - | |
| 6 | PC5 | - | SW1 and EXT3 |
| 7 | - | - | |
| 8 | - | - | |
| 9 | - | - | |
| 10 | - | - |
Note:
- PA0 is configured as UPDI by default. PA0 can be fused to be RESET or GPIO, but this is prevented by the EDBG, as this will disable all further programming and debugging by the EDBG.
- Even though PC5 is connected to the UPDI debug connector, this pin is not used for programming or debugging.