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, since there are little contaminations 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 On-Board Debugger Overview.
| AVR128DB48 Pin | Debugger Pin | Function | Shared Functionality |
|---|---|---|---|
| PB1 | CDC TX | UART RX (AVR128DB48 RX line) | Edge connector |
| PB0 | CDC RX | UART TX (AVR128DB48 TX line) | Edge connector |
| UPDI | DBG0 | UPDI | Edge connector |
| PB3 | DBG1 | LED0/Debug GPIO1 | Edge connector |
| PB2 | DBG2 | SW0/Debug GPIO0 | Edge connector |
| PF6 | DBG3 | RESET | Edge connector |