7.2

Connecting External Debuggers

Even though there is an onboard debugger, external debuggers can be connected directly to

ATmega4809 Curiosity Nano to program/debug the ATmega4809. The onboard debugger keeps all the

pins connected to the ATmega4809 and board edge in tri-state when not actively used. Therefore, the

onboard debugger will not interfere with any external debug tools.

Figure 7-2. Connecting the PICkit

USB

DEBUGGER

PS LED

NC

ID

CDC RX

CDC TX

DBG1

DBG2

VBUS

VOFF

DBG3

DBG0

GND

VTG

CURIOSITY NANO

2

3

4

5

6

7

8

1

Ground

DATA

3 = Ground

4 = PGD

5 = Unused

6 = Unused

7 = Unused

8 = Unused

1 = Unused

MPLAB® PICkit™ 4

ATmega4809 Curiosity Nano

Appendix

User Guide

DS50002804A-page 21