EVAL-AD7476 Datasheet, PDF (6/12 Pages) Analog Devices – Evaluation Board for 1MSPS, 12-/ 10-Bit ADCs

EVAL-AD7476/77CB
Figure 3. Main Screen
SOFTWARE DESCRIPTION
used. When a button is pressed, it is highlighted on the
Included in the EVAL-AD7476/77CB evaluation board
screen. The next button can be highlighted by using the
package is a PC-compatible disk which contains software Tab key or the previous button by holding down the shift
for controlling and evaluating the performance of the
key and the Tab key together. The highlighted button can
AD7476/77 when it is operated with the EVAL-CON-
also be pressed by pressing the space bar. Pressing the
TROL BOARD. The EVAL-AD7476/77CB Demonstra- ESC key halts any operation currently in progress. In this
tion/Evaluation Software runs under DOS 4.0 or later and document, if a button can be activated from the keyboard
requires a minimum of a 386-based machine with 400kB
then the key used is shown in bold in the button name.
of base RAM and 500kB of free hard disk space. The user For example, "no prog" has the "p" highlighted in bold,
interface on the PC is a dedicated program written espe-
indicating that the button can be activated by pressing the
cially for the AD7476/77.
p key.
The disk which accompanies the EVAL-AD7476/77CB
contains several files. The user should create a new direc-
tory on the main PC drive and label this "AD7476/77".
Then, all files on the EVAL-AD7476/77CB disk should
be copied into this directory. The Mouse Driver on the
PC should be enabled before running the software. If this
has not been loaded, the program will not run.
To run the software, simply make the AD7476/77 direc-
tory the current directory and type "go". When the evalua-
tion program starts, the user sees the screen shown on
Figure 3 (without any FFT or scope waveforms). This is
the main screen and it is divided into three parts. The top
part provides the main control interface for the AD7476/
77 evaluation software. The middle part of the main
screen functions as a Digital Storage Oscilloscope and the
bottom part of the main screen operates as either a Digital
Spectrum Analyzer or a Histogram analyzer.
Each part of the screen has several buttons that can be
pressed by using the mouse or the keyboard. To press a
button using the mouse, simply use it to move the on-
screen pointer to the button to be activated and click. To
use the keyboard, simply press the appropriate key as
highlighted on the button. Lower case letters must be
Some buttons have a red indicator. A red indicator on the
button means that the function associated with that button
is on. Absence of the red indicator light means that the
function associated with the button is off. The on/off
status of these buttons is changed simply by selecting the
button.
Setting up the EVAL-CONTROL BOARD
When the software is run, the "F2 Setup" button in the top
left of the screen should be selected to pop up the setup
menu (see fig. 4). This menu sets up the EVAL-
CONTROL BOARD for use with the EVAL-AD7476/
77CB.
Firstly, a configuration file must be chosen. The configura-
tion file contains the default configuration information for
the EVAL-CONTROL BOARD, the Digital Spectrum
Analyzer and the Digital Storage Oscilloscope. It also tells
the AD7476/77.EXE software which .HIP file to download
to the ADSP-2111. The .HIP file contains the DSP code
which is executed by the ADSP-2111. Normally, the "no
prog" button is off, so when the configuration file is loaded,
the .HIP file is automatically downloaded to the ADSP-
2111. However, if the "no prog" button is on, then the .HIP
file is not downloaded to the ADSP-2111.
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