CRD4202-2
AC '97 Six Channel CNR Audio Reference Design with PLL
Features
Phase Locked Loop (PLL) Codec Operation
Six Channel Analog Audio Outputs
Headphone Sense using GPIO
CS4202 codec and two CS4334 DACs
20-bit D to A conversion (DAC)
18-bit A to D conversion (ADC)
S/PDIF (IEC-958) optical digital output
Complete suite of Analog I/O connections:
– Line, Mic, CD, Video, Modem, and Aux Inputs
– Modem, Headphone, Line Front, Line Rear
and Line Center/Sub-Woofer Outputs
Description
The CRD4202-2 reference design eliminates the cost of
the 24.567 MHz crystal by operating the CS4202 in
Phase Locked Loop (PLL) mode. This reference design
also features six channel analog audio outputs, an opti-
cal S/PDIF digital output, and Communication and
Networking Riser (CNR) interface. This design uses the
CS4202 audio codec which has several advanced fea-
tures including a built-in headphone amplifier,
simultaneous six channel analog and S/PDIF optical
digital output, GPIO for headphone detection, and up to
30 dB of internal microphone boost.
The CRD4202-2 reference design is available by order-
ing the
CMK4202-2
manufacturing kit. This kit includes
the CRD4202-2 board, a full set of schematic design
files (OrCAD
®
format), PCB job files (PADS
®
ASCII),
PCB artwork files, and bill of materials. This reference
design offers significant cost savings over competing
solutions and can be easily modified to meet your spe-
cific design goals.
ORDERING INFO
CMK4202-2
(Manufacturing Kit)
2-layer low cost PC board
Complies with Intel
®
AC
'97
revision 2.2
Exceeds Microsoft’s
®
PC 2001 audio
performance requirements.
Microphone Input
Line Input
Line Output
Headphone Output
Rear Channel Output
Center / Sub-Woofer Output
S/PDIF Digital Optical Output
MIC
IN
INT MODEM
LINE
IN
LINE
OUT
HEADPH
OUT
SURR
OUT
CNT/LFE
OUT
CD IN
VIDEO IN
AUX IN
Cirrus Logic
CRD4202-1
CS4202
S/PDIF
OUT
Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright Cirrus Logic, Inc. 2002
(All Rights Reserved)
MAR ‘02
DS549RD1B1
1
©
CIRRUS [ CIRRUS LOGIC ]
