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.

Table 4-3. On-Board Debugger Connections
AVR128DB48 PinDebugger PinFunctionShared Functionality
PB0CDC RXUSART3 TX (AVR128DB48 TX line)
PB1CDC TXUSART3 RX (AVR128DB48 RX line)
UPDIDBG0UPDI
PB2DBG1DGI GPIO1/LED4LEDs
PD2DBG2DGI GPIO0/SW0Mechanical Switches