Power Measurements
1-14
ADSP-BF707 EZ-KIT Lite Evaluation System Manual
removed. See
for more information. The voltage
level of
VDD_DMC0
can be measured by using the INA230 IC (
U31
) and the
current consumption of the domain, if the jumper is removed. See
section for more information
A FET switch (
U40
) controls the 5V to the USB devices over the
USB0_VBUS
signal.
Power Measurements
Locations are provided for measuring the current draw from various power
planes. Precision 0.05 ohm shunt resistors are available on the
VDD_EXT
,
VDD_INT
,
USB0_VBUS
, and 3.3V and voltage domains. For current draw, the
jumper is removed, voltage across the resistor can be measured using an
oscilloscope, and the value of the resistor can be measured using a preci-
sion multi-meter. Once voltage and resistance are measured, the current
can be calculated by dividing the voltage by the resistance. For the highest
accuracy, a differential probe should be used for measuring the voltage
across the resistor.
There are also ICs (
U48
and
U31
) that can be used to measure the current
consumption of each power rail in software when the jumper is removed.
For more information, refer to
.
Example Programs
Example programs are provided with the ADSP-BF707 Board Support
Package to demonstrate various capabilities of the product. The programs
can be found in the
ADSP-BF707_EZ-Board-Rel1.0.0\examples
folder.
The number after the “Rel” could be higher for newer versions. Refer to a
readme file provided with each example for more information.
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