4.3.1 On-Board Debugger Connections

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.

Table 4-4. On-Board Debugger Connections
ATmega4809 PinDebugger PinFunctionShared Functionality
PB1CDC TXUART3 RX (ATmega4809 RX line)Edge connector
PB0CDC RXUART3 TX (ATmega4809 TX line)Edge connector
UPDIDBG0UPDIEdge connector
PF3DBG1GPIO1Edge connector
PF2DBG2GPIO0Edge connector
PF6DBG3RESETEdge connector, SW0