EVAL-AD73360LEB Datasheet, PDF (5/9 Pages) Analog Devices – AD73360L Evaluation Board, Six Input Channel Analog Front End

When the DSP program is running the user can click
Take Samples. This will cause the the PC to send a com-
mand to the DSP on the evaluation board. The DSP will
bring the SE and RESET lines of the AD73360(L) high
and begin programming the device. The AD73360(L) is
configured in Frame-Sync Loop Back and is programmed
to operate in Data Mode. After allowing some time for the
reference to settle the AD73360(L) will store the required
number of samples to the data memory of the DSP. Once
completed the DSP will bring the RESET and SE of the
AD73360(L) low and begin uploading the data to the PC.
When the data has been transferred the PC will graph the
data and calculate the FFT. It should be noted that the
number of channels selected at the top of the demonstra-
tion window should match the number of ADC channels
powered up on the AD73360(L).
THE BASIC MODE SCREEN
The Basic Mode Screen as shown in Figure 2 allows the
user to download their own programs to the evaluation
board, send it commands and upload data memory for
saving or analysis.
Downloading Programs
The user has the option of downloading a program to the
evaluation board in one of two ways. The first is to down-
load the program but not to run it until the Run button is
clicked. The second is to download and automatically run
the program. If the user is using a modified version of the
BASIC.DSP program the LED on FL2 will flash a num-
ber of times to indicated that the program has been down-
loaded and run successfully.
Sending Commands
A command can be sent to the evaluation board which can
be used to determine which action is to be performed. The
command is made up of an Identifier Byte and a 16 bit
Control Word. The Identifier Byte is stored in data
memory location 0x3FDB and the Control Word is stored
in data memory location 0x3FDA. The BASIC.DSP pro-
gram will read the Identifier Byte and flash the LED that
number of times.
Uploading Data
If the user has acquired ADC data from the AD73360(L)
which is stored in data memory it can be uploaded to the
PC. Clicking the Upload Data button will display the
screen shown in Figure 6. The user can select the start
address and the number of words to upload. The uploaded
data can be saved to a file or to a list box on the Basic
Mode Screen. The user also has the option to save/display
the data in decimal or hexidecimal format.
Reset Board
This button allows the user to reset the evaluation board if
required.
Get Software Version
This button will read the version number of the boot pro-
gram which is store on the evaluation board. This is a
useful indication that the communication routines are fully
working as it involves 2-way communication to be suc-
cessful.
REV. 0
–5–
EVAL-AD7360(L)EB
Figure 6. the Upload Data Screen