Using the Energy Probe
ARM DUI 0482K Copyright © 2010-2012 ARM. All rights reserved. 12-2
ID120712 Non-Confidential
12.1 Energy Probe overview
The Energy Probe is designed to be a low impact, inexpensive solution to give you quick
feedback on the impact of your code on the system energy footprint. It is not intended to be a
high-precision data acquisition instrument for power benchmarking.
It has three power connectors, each of which is designed to connect to a 2-pin header for
measuring the power. This allows the energy probe to provide three independent power, current,
or voltage measurements.
Figure 12-1 Energy Probe schematic
In addition to the three power connectors, the Energy Probe has a single pin GND connector that
must be connected to ground on your target board. It provides a ground connection for the
Energy Probe.
Each of the three power connectors measures:
• The current flow through a shunt resistor of a known value on your target system
• The voltage at the positive terminals of the Energy Probe.
Figure 12-2 Energy Probe electrical connection example
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