Current Measurement - Microchip Technology ATmega4809 Curiosity Nano User Manual

Figure 3-5. Kit Modifications
3.5

Current Measurement

The power to the ATmega4809 is connected from the onboard power supply to the target voltage supply
(VTG) with a cut strap as shown in Section
power consumption of the ATmega4809 and other peripherals connected to the board, cut the strap and
connect an ammeter over the strap. The ammeter can be connected between the target VTG pad edge
connector and an external power supply for easy measurement. Alternatively, an external power supply
can be used as described in Section
Info: The onboard level shifters will draw a small amount of current even when they are not in
use. A maximum of 10 µA can be drawn from the VTG net and an additional 2 µA can be drawn
from each I/O pin connected to a level shifter for a total of 20 µA. Disconnect the onboard
debugger and level shifters as described in Section
to prevent any leakage.
©
2018 Microchip Technology Inc.
ATmega4809 Curiosity Nano
GPIO straps (bottom side)
3.4 Disconnecting the Onboard
3.3.2 External Supply.
User Guide
Curiosity Nano
VTG strap (top side)
Debugger. To measure the
3.4 Disconnecting the Onboard Debugger
DS50002804A-page 13