Power Measurements; Power-On-Self Test - Analog Devices EZ-Board ADSP-BF518F Manual

Power Measurements

Power Measurements
Several locations are provided for measuring the current draw from vari-
ous power planes. Precision 0.1 ohm shunt resistors are available on the
VDDINT, VDDEXT, VDDMEM, and VDDFLASH voltage domains.
For current draw measuments, the associated jumper (
removed. Once the jumper is removed, the voltage across the resistor can
be measured using an oscilloscope. Once voltage is measured, current can
be calculated by dividing the voltage by 0.1. For the highest accuracy, a
differential probe should be used for measuring voltage across the resistor.
For more information, see
"VDDEXT Power Jumper (P9)" on page
Jumper (P10)" on page
page 2-20.

Power-On-Self Test

The power-on-self-test program (POST) tests all EZ-Board peripherals
and validates functionality as well as connectivity to the processor. Once
assembled, each EZ-Board is fully tested for an extended period of time
with a POST. All EZ-Boards are shipped with the POST preloaded into
one of its on-board flash memories. The POST is executed by resetting the
board and pressing the proper push button(s). The POST also can be used
as a reference for a custom software design or hardware troubleshooting.
Note that the source code for the POST program is included in the Visu-
alDSP++ installation directory along with the readme text file, which
describes how the EZ-Board is configured to run a POST.
1-24
"VDDINT Power Jumper (P8)" on page
2-20, and "VDDFLASH Power Jumper (P11)" on
ADSP-BF518F EZ-Board Evaluation System Manual
P8—11
2-19, "VDDMEM Power
) should be
2-19,