Digilent 410-182P-KIT - Manual (Page 22)

Nexys3 Reference Manual
Doc: 502-182 page 22 of 22
Built-In Self Test
A demonstration configuration is loaded into the BPI PCM device on the Nexys3 board during
manufacturing. This demo bit file is available for download from the Digilent website. If the demo
configuration is present in the BPI PCM device and the Nexys3 board is powered on in BPI mode, a
simple demo project will allow basic hardware verification. The demo drives a counter on the 7-
segment display, drives the user LEDs on and off when the user switches are toggled, turns off digits
on the 7-segment display when user buttons are pressed, and drives an image out the VGA port. A
USB mouse can be connected to J4 for a simple visual demonstration.
If the demo configuration is not present in the BPI device, it can be downloaded from the Digilent
website and programmed directly into the FPGA or reloaded into the PCM device using the Adept
programming software. The same basic functionality is also available using the automated Test tab in
the Adept application. Using the Test tab automatically loads a demo configuration into the FPGA, so
no separate bit files or project need to be used.
All Nexys3 boards are 100% tested during the manufacturing process. If any device on the Nexys3
board fails test or is not responding properly, it is likely that damage occurred during transport or
during use. Typical damage includes stressed solder joints and contaminants in switches and buttons
resulting in intermittent failures. Stressed solder joints can be repaired by reheating and reflowing
solder and contaminants can be cleaned with off-the-shelf electronics cleaning products. If a board
fails test within the warranty period, it will be replaced at no cost. If a board fails test outside of the
warranty period and cannot be easily repaired, Digilent can repair the board or offer a discounted
replacement. Contact Digilent for more details.