CDB8420 Datasheet, PDF (5/14 Pages) Cirrus Logic – Evaluation Board

CDB8420
2. CDB8420.EXE QUICK START GUIDE
2.1 Setting up the hardware:
1) Connect the CDB8420 to a 5V DC power sup-
ply.
2) Set: J11 to Optical, J16 to S/PDIF, enable J13
(S/PDIF), and disable J15 (MUTE).
3) Connect the CDB8420 to the PC COM port us-
ing RS232 cable.
4) Apply power to the board.
5) Press the RESET switch (S5).
At this point, the RERR and PROC should be lit.
The hardware is now ready!
2.2 Installing the software:
1) Create a directory called CDB8420 anywhere
on your system.
2) Copy CDB8420.exe into this directory.
3) If you do not already have them, copy the in-
cluded DLLs msvcrt.dll and mfc42.dll into
your \Windows\System directory.
4) If desired, create a shortcut to CDB8420.exe on
your desktop.
At this point, you are ready to start up the software.
2.3 Starting up the software:
1) Double-click on CDB8420.exe or its shortcut.
2) If you get errors right away, the COM port
needs to be set properly.
3) Click anywhere but inside one of the boxes, this
brings up the Board Setup control panel.
4) Select the COM port you are using to connect
to the CDB8420.
5) Shut down the application, reset the board, and
then restart the application.
2.4 Starting up the Hardware:
1) Click anywhere but inside one of the boxes, this
brings up the Board Setup control panel.
2) Click on the Reset button. You should see the
TX and RX leds light up briefly.
3) Click on the Sample Rate Converter tab, then
set the SRC data source to AES3 Receiver.
4) Click on the Clock Sources tab, uncheck the
Stop Internal Clocks box and click on RMCK
derived from AES3 input frame.
5) Check the performance of the board by doing
an FFT with a -1dBFS 1kHz sine wave for in-
put at 44.1kHz and 48kHz sample rates using
the optical input and optical output.
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