Digilent 410-178P-KIT - Manual (Page 6)

Atlys Reference Manual
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Test Interface
The test interface provides an easy way to
verify many of the board's hardware circuits and
interfaces. These are divided into two major
categories: on-board memory (DDR2 and
Flash) and peripherals. In both cases, the
FPGA is configured with test and PC-
communication circuits, overwriting any FPGA
configuration that may have been present.
Clicking the Run RAM/Flash Test button will
perform a walking ‘1’ test on the DDR2 memory
and verify the IDCODE in the SPI Flash.
Clicking the Start Peripherals Test button will
initialize GPIO and user I/O testing. Once the
indicator near the Start Peripherals Test button
turns green, all peripheral tests can be run.
The Test Shorts feature checks all discrete
I/O’s for shorts to Vdd, GND, and neighboring
I/O pins. The switches and buttons graphics
show the current states of those devices on the
Atlys board. Each button press will drive a tone
out of the LINE-OUT or HP-OUT audio
connectors.
Power
The power application provides highly-accurate
(better than 1%) real-time current and power
readings from four on-board power-supply
monitors. The monitors are based on Linear
Technology
’s LTC2481C sigma-delta analog-
to-digital converters that return 16-bit samples
for each channel.
Real-time current and power data is displayed
in tabular form and updated continuously when
the power meter is active (or started).