4.3 Current Measurement

The power to the target controller ATtiny817 and its peripherals is connected from the VCC_BOARD supply to the targets VCC_TARGET supply with a 0Ω resistor (R104), as shown in the figure below. To measure the power consumption of the device, remove the 0Ω resistor and replace it with an ammeter. The ammeter can be connected between the VCC_BOARD (pin 2 on the target voltage select header) and VCC_TARGET (pin 2 on the power header) pads for easy measurement.

CAUTION: Removing the resistor while the kit is powered without an ammeter or 0Ω resistor mounted may cause the ATtiny817 to be powered through its I/O pins. This may cause permanent damage to the device.
Figure 4-4. Current Measurement