Digilent Atlys Manuale di riferimento - Pagina 19

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Atlys Reference Manual
Digilent produces a large collection of Pmod accessory boards that can attach to the Pmod and
VHDC expansion connectors to add ready-made functions like A/D's, D/A's, motor drivers, sensors,
cameras and other functions. See
www.digilentinc.com
for more information.

Built-In Self Test

A demonstration configuration is loaded into the SPI Flash ROM on the Atlys board during
manufacturing. This demo, also available on the Digilent website, can serve as a board verification
test since it interacts with all devices and ports on the board. When Atlys powers up, if the
demonstration image is present in the SPI Flash, the DDR is tested, and then a bitmap image file will
be transferred from the SPI Flash into DDR2. This image will be driven out the HDMI J2 port for
display on a DVI/HDMI-compatible monitor. The slide switches are connected to the user LEDs. The
user buttons BTNU, BTND, BTNR, BTNL, BTNC, and RESET cause varying sine-wave frequencies to
be driven on the LINE OUT and HP OUT audio ports.
If the self test is not resident in the SPI Flash ROM, it can be programmed into the FPGA or reloaded
into the ROM using the Adept programming software.
All Atlys boards are 100% tested during the manufacturing process. If any device on the Atlys 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.
Doc: 502-178
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