The block diagram below shows all connections between the debugger and the ATmega4809 microcontroller. The rounded boxes represent connections to the board edge on ATmega4809 Curiosity Nano. The signal names are shown in Figure 1 and printed in silkscreen on the bottom side of the board.
Figure 1. Onboard Debugger
Connections to the ATmega4809
By cutting the GPIO straps with a sharp tool, as shown in Figure 2, all I/Os connected between the debugger and the ATmega4809 are completely disconnected. To completely disconnect the target regulator, cut the VTG strap shown in Figure 2.
Info: Cutting the connections to the debugger will disable programming,
debugging, data streaming, and the target power supply. The signals will
also be disconnected from the board edge next to the onboard debugger
section.
Info: Solder in 0Ω resistors across the footprints or short-circuit them with tin
solder to reconnect any cut signals.
Figure 2. Kit
Modifications