3.6 Connecting External Debuggers

Even though there is an on-board debugger, external debuggers can be connected directly to the ATmega4809 Curiosity Nano to program/debug the ATmega4809. The on-board debugger keeps all the pins connected to the ATmega4809 and board edge in tri-state when not actively used. Therefore, the on-board debugger will not interfere with any external debug tools.

Figure 3-11. Connecting the MPLAB® PICkit™ 4 In-Circuit Debugger/Programmer to ATmega4809 Curiosity Nano

Figure 3-12. Connecting the Atmel-ICE to ATmega4809 Curiosity Nano

CAUTION: To avoid contention between the external debugger and the on-board debugger, do not start any programming/debug operation with the on-board debugger through MPLAB® X IDE or Atmel Studio 7 or mass storage programming while the external tool is active.