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 1. On-Board Debugger Connections
ATmega4808 Pin Debugger Pin Function Shared Functionality
PF1 CDC TX UART2 RX (ATmega4808 RX line)
PF0 CDC RX UART2 TX (ATmega4808 TX line)
UPDI DBG0 UPDI
PF6 DBG1 DGI GPIO0 SW0
PF5 DBG2 DGI GPIO1 SW1