User Guide

3.5 Current Measurement
The power to the SAMD21G17D is connected from the on-board power supply to the target voltage supply (VTG)
with a cut strap as shown in
Disconnecting the On-Board Debugger. To measure the power consumption of the
SAMD21G17D 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 External Supply.
Tip: The on-board level shifters will draw a small amount of current even when they are not in use.
Disconnect the On-Board Nano Debugger and level shifters as described in Disconnecting the On-Board
Debugger to prevent any current leakage.
SAM D21
Curiosity Nano
© 2020 Microchip Technology Inc.
User Guide
DS70005409C-page 10
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