The table below shows the connections between the target and the debugger section. All connections between the target and the debugger are tri-stated as long as the debugger is not actively using the interface. Hence there is little contamination of the signals the pins can be configured to anything the user wants.
For further information on how to use the capabilities of the on-board debugger, see Section Curiosity Nano.
| ATtiny1607 Pin | Debugger Pin | Function | Shared Functionality |
|---|---|---|---|
| PB3 | CDC TX | UART RX (ATtiny1607 RX line) | Edge connector |
| PB2 | CDC RX | UART TX (ATtiny1607 TX line) | Edge connector |
| UPDI | DBG0 | UPDI | |
| PB7 | DBG1 | GPIO | Edge connector |
| PC4 | DBG2 | GPIO | Edge connector |
| UPDI | DBG3 | RESET (J202, not connected by default) | Edge connector |