MCP2221 I
2
C Demonstration Board User’s Guide
DS50002480A-page 24 2016 Microchip Technology Inc.
Click the Start Measurement button for the system to start performing measurements.
Pressing the Stop Measurement button interrupts the measurements.The Reset
Measurement button clears all the previously generated data and prepares the system
for new measurements.
The Measure All One Time button is for the application to retrieve, in real time, just
one set of numeric values (for voltage, current and power) and to write them in the cor-
responding text box below it. This can be used as an alternate solution to
Start Measurement in order to save system resources.
Figure 3-6 shows an example for measuring the current, voltage and power of a USB
Flash drive when connected to the PC via the measuring circuit.
FIGURE 3-6: MEASURING CURRENT, VOLTAGE AND POWER OF A USB DEVICE
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