Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2003
(All Rights Reserved)
http://www.cirrus.com
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
CS8420
Amtel
µC
Optical In
S/PDIF In
AES 3 In
AES 3 Out
S/PDIF Out
Optical Out
RS232 port to PC
Dec ‘03
DS245DB4
