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PDF CDB8420 Data sheet ( Hoja de datos )
| Número de pieza | CDB8420 | |
| Descripción | Evaluation Board | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CDB8420 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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CDB8420
Evaluation Board for CS8420
Features
Asynchronous Sample Rate Conversion
Input to output conversion ratio as large as
1:3 or 3:1
Receives and transmits AES/EBU, S/PDIF
and EIAJ-340 compatible digital audio
Runs from a single 5 Volt supply.
Crystals are supplied to allow operation at
44.1 kHz, 48 kHz, and 96 kHz output sample
rates.
Digital patch area.
Description
The CDB8420 is designed to allow rapid evaluation of
the CS8420. Because of the high performance of the
CS8420, the board is set up for easy connection to an
Audio Precision or a Rohde and Schwarz test system.
Currently available A/D and D/A converters are not ade-
quate to test the full performance of the device.
Input and output data may independently be set to either
AES/EBU or S/PDIF in optical or coaxial physical
formats.
Windows 98 PC software provides a GUI interface to
make configuration easy. The software communicates
through the PC’s RS232 port to a micro-controller on the
evaluation board that controls the CS8420. All the possi-
ble software modes of the CS8420 may be tested.
ORDERING INFORMATION
CDB8420
Evaluation Board
I
Optical In
S/PDIF In
AES 3 In
Amtel
µC
CS8420
RS232 port to PC
Optical Out
S/PDIF Out
AES 3 Out
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
Dec ‘03
DS245DB4
1
1 page  
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.
DS245DB4
5
5 Page 
CDB8420
DS245DB4
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CDB8420.PDF ] | |
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