4.2.1 On-Board Debugger Connections
The table below shows the connections between the target and the debugger section. All the connections between the target and the debugger are tri-stated when the debugger is not using the interface. Hence, there are few contaminations of the signals, e.g., 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 |
---|---|---|---|
PB0 | CDC RX | USART3 TX (AVR128DB48 TX line) | — |
PB1 | CDC TX | USART3 RX (AVR128DB48 RX line) | — |
UPDI | DBG0 | UPDI | — |
PB2 | DBG1 | DGI GPIO1/LED4 | LEDs |
PD2 | DBG2 | DGI GPIO0/SW0 | Mechanical Switches |