Instruction Manual

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Table Of Contents

Preliminary Product Information

This document contains information for a new product.

Cirrus Logic reserves the right to modify this product without notice.

P.O. Box 17847, Austin, Texas 78760

(512) 445 7222 FAX: (512) 445 7581

http://www.cirrus.com

CrystalClear™ AC '97 Six Channel CNR Audio Reference Design

Features

! 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

! 2-layer low cost PC board

! Meets Intel

AC '97 revision 2.2

! Exceeds Microsoft’s

PC 2001 audio

performance requirements.

Description

The CRD4202-1 reference design features six channel

analog audio outputs, an optical S/PDIF digital output,

and Communication and Networking Riser (CNR) inter-

face. This design uses the CS4202 audio codec which

has several advanced features including a built-in head-

phone amplifier, simultaneous six channel analog and

S/PDIF optical digital output, GPIO for headphone de-

tection, and up to 30 dB of internal microphone boost.

The CRD4202-1 reference design is available by order-

ing the CMK4202-1 manufacturing kit. This kit includes

the CRD4202-1 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

CMK4202-1 (Manufacturing Kit)

AUX INVIDEO INCD ININT MODEM

MIC

Cirrus Logic

CRD4202-1

CS4202

S/PDIF

OUT

CNT/LFE

OUT

SURR

OUT

HEADPH

OUT

LINE

OUT

LINE

Microphone Input

Line Input

Line Output

Headphone Output

Rear Channel Output

Center / Sub-Woofer Output

S/PDIF Digital Optical Output

JAN ‘02

DS549RD1A1

CRD4202-1

Summary of content (24 pages)

PAGE 1
CRD4202-1 CrystalClear™ AC '97 Six Channel CNR Audio Reference Design Features Description ! Six The CRD4202-1 reference design features six channel analog audio outputs, an optical S/PDIF digital output, and Communication and Networking Riser (CNR) interface.
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CRD4202-1 TABLE OF CONTENTS 1. GENERAL INFORMATION ...................................................................................3 2. SCHEMATIC DESCRIPTION ................................................................................3 2.1 CS4202 Audio Codec .................................................................................3 2.2 Analog Inputs ..............................................................................................3 2.3 Rear Channel and Surround Outputs ...........
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CRD4202-1 1. GENERAL INFORMATION The CRD4202-1 reference design is a CNR card that features six channel CD quality analog and S/PDIF digital audio outputs. The card includes a CS4202 AC '97 audio codec and two CS4334 24bit serial stereo DACs. This combination gives the CRD4202-1 a rich feature set and industry leading audio performance. The CS4202 audio codec includes a stereo 20-bit DAC, a stereo 18-bit ADC, and a very flexible analog audio mixer.
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CRD4202-1 The CS4202 features a pseudo-differential CD input that minimizes common mode noise and interference. Each CD signal acts as one side of the differential input and CD_COM acts as the other side. CD_COM is used as the common return path for both the left and right channels. ed at OEMs, system manufacturers, and system integrators who wish take advantage of physically separating their audio, modem, or LAN circuitry from the PC motherboard.
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CRD4202-1 formance, and package selection as the most important factors. Listed are some of the guidelines used in the selection of components: • No components smaller than 0805 SMT package. • Only single package passive components. No resistor packs. This reduces the risk of crosstalk between analog audio signals. • All components except connectors are in surface mount packages. 2.10 EMI Components out.
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CRD4202-1 4. REFERENCES 1) Intel®, Audio Codec '97 Component Specification, Revision 2.2, September, 2000. http://developer.intel.com/ial/scalableplatforms/audio/index.htm/ 2) Intel®, CNR Specification, Revision 1.1, October 18, 2000. http://developer.intel.com/technology/cnr/ 3) Cirrus Logic, CS4202 Audio Codec '97 Data Sheet http://www.cirrus.com/products 4) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Version 1.0 http://www.cirrus.com/pubs/meas100.
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CRD4202-1 ANALOG_IN CS4202 LINE_IN_L LINE_IN_R CD_IN_L CD_IN_R CD_C VIDEO_IN_L VIDEO_IN_R AUX_IN_L AUX_IN_R ANALOG_OUT LINE_IN_L LINE_IN_R HP_OUT_L HP_OUT_R HP_OUT_C CD_IN_L CD_IN_R CD_C GPIO2 VIDEO_IN_L VIDEO_IN_R HP_OUT_L HP_OUT_R HP_OUT_C GPIO2 LINE_OUT_L LINE_OUT_L LINE_OUT_R LINE_OUT_R AUX_IN_L AUX_IN_R SPDIF_OUT MIC_IN PHONE_IN MONO_OUT PC_BEEP MIC1 PHONE_IN MONO_OUT SPDIF_OUT SPDIF_TX PC_BEEP PLL (optional) ID0# ID0# ID1# ID1# SERIAL_PORT ARST# ABITCLK ASYNC ASDOUT XTAL_IN X
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U1 +3.3VD 25 38 +5VA 1 9 12 PC_BEEP C1 0.1uF Z5U C2 0.1uF Z5U C3 0.1uF Z5U DGND C4 0.1uF Z5U AGND 13 14 PHONE_IN AUX_IN_L AUX_IN_R VIDEO_IN_L 15 16 17 VIDEO_IN_R CD_IN_L 18 19 CD_C CD_IN_R MIC1 20 21 22 23 24 LINE_IN_L LINE_IN_R 28 27 29 30 R55 PRIM_DN# C5 2.2uF Y5V C6 0.
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LINE IN L1 C16 J2 1uF ELEC + 3 2 1 R5 J1 4 3 5 2 1 L2 C18 1uF ELEC + C19 100pF NPO CD_C 100K Connect CGND C20 100pF NPO to AGND at R4 6.8K R6 6.8K R8 6.8K R10 6.8K C17 1uF ELEC C21 LINE_IN_R 1uF ELEC + R9 AGND AGND 31@100MHz CD_IN_R 100K + 31@100MHz AGND 4 AGND DS549RD1A1 CD IN LINE_IN_L the jack L3 C22 1uF ELEC + AGND 31@100MHz R12 CD_IN_L AGND CGND 100K +5VA VIDEO IN MIC IN L4 R13 6.8K C23 J4 1uF ELEC + 6.8K L5 R18 6.8K 31@100MHz R19 6.
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+5VA SURROUND JACK C36 SDOUT0 1 2 3 4 SDATA DEM#/SCLK LRCK AOUTR VA+ AGND MCLK AOUTL 5 7 6 1uF ELEC R30 + CS4334 1uF ELEC R31 + U2 C37 8 560 J8 4 3 5 2 1 560 Connect CGND R32 270K R33 270K R34 47K R35 47K C38 2700pF X7R +5VA + C40 10uF ELEC C41 0.1uF Z5U C39 2700pF X7R to AGND at the jack C42 0.
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DS549RD1A1 LINE OUT + 1uF ELEC + JACK C48 1uF ELEC LINE_OUT_R C49 LINE_OUT_L J10 4 3 5 2 1 Connect CGND to AGND at R44 220K R45 220K AGND C50 100pF NPO the jack C51 100pF NPO AGND CGND +3.3VD R56 10K HEADPHONE GPIO2 + C54 + 220uF ELEC + HP_OUT_L C55 1uF ELEC HP_OUT_R C56 HP_OUT_C JACK 220uF ELEC J11 7 6 2 3 1 Connect CGND R48 10K C57 100pF NPO CGND Figure 5.
PAGE 12
CRD4202-1 SPDIF_TX J12 5 4 +5VD 3 R50 DGND 8.2K 2 C59 0.1uF Z5U 1 6 TOTX-173 DGND DGND Figure 6.
PAGE 13
DS549RD1A1 P1 B1 B2 B3 B5 B6 B8 B9 B12 B13 reserved reserved GND GND LAN_TXD2 LAN_TXD1 LAN_TXD0 B16 B17 LAN_RXD2 LAN_RXD1 LAN_RXD0 reserved USB+ GND +5Vdual USB- USB_OC# +12V GND B18 GND -12V B19 +3.3Vdual +3.
PAGE 14
CRD4202-1 OPTIONAL PLL (Phase Locked Loop) ID0# ID1# XTAL_OUT XTAL_IN Test Clock Only For PLL operation: +3.3VD R52 NO POP R51 NO POP Populate R54 = 1K 2) DO NOT populate: Y1, C14, C15, and R55 3) Apply external oscillator to XTAL_IN (pin 2) C69 NO POP 4 1 R53 NO POP 1) (CRD4202-1 can use test oscillator on Y2: ECS-8FA3) 3 C68 NO POP 4) Populate R51, R52, R53, C68, and C69 according to 2 your input clock rate: Y2 NO POP DGND DGND clock rate (MHz) R51 R52 R53 C68 14.
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CRD4202-1 +3.3VD C70 0.1uF X7R R54 = 1K forces R54 1K U7 TC7SZ125FU 5 motherboard codec(s) to be held in RESET 4 ASDIN1 3 1 2 PRIM_DN# DGND 2 4 ASDIN0 3 ASDIN C71 0.1uF X7R 5 U8 TC7SZ126FU 1 +3.3VD DGND DO NOT use this circuit for motherboard designs. This circuit is strictly for CNR cards. For motherboard designs: connect ASDIN to ASDIN0 if primary codec, connect ASDIN to ASDIN1 if secondary codec.
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CRD4202-1 Figure 10.
PAGE 17
CRD4202-1 Figure 11.
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CRD4202-1 Figure 12.
PAGE 19
CRD4202-1 Figure 13.
PAGE 20
CRD4202-1 Figure 14.
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DS549RD1A1 5. BILL OF MATERIALS Quantity Reference Manufacturer Part Number Description 1 12 C1,C2,C3,C4,C31,C41, C42,C59,C60,C61,C63,C65 KEMET C0805C104M5UAC CAP, 0805, Z5U, 0.1 µF, 20%, 50V 2 1 C5 KEMET C1206C225M8VAC CAP, 1206, Y5V, 2.2 µF, 20%, 10V 3 3 C6,C70,C71 KEMET C0805C104K5RAC CAP, 0805, X7R, 0.
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10 L1,L2,L3,L4,L5,L6,L7,L8, L9,L10 TDK HF50ACB321611-T IND, FBEAD, 1206, 31@100MHz, 25% 19 1 P1 NONE NONE CNR BUS CONNECTOR 20 2 R2,R1 PHILIPS 9C08052A47R0J RES, SO, 0805, 47, 5%, 1/10W, METAL FILM 21 14 R4,R6,R8,R10,R13,R16, R18,R19,R20,R22,R24, R25,R26,R27 PHILIPS 9C08052A6801F RES, SO, 0805, 6.8K, 1%, 1/10W, METAL FILM 22 3 R5,R9,R12 PHILIPS 9C08052A1003J RES, SO, 0805, 100K, 5%, 1/10W, METAL FILM 23 1 R14 PHILIPS 9C08052A2201J RES, SO, 0805, 2.
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DS549RD1A1 38 1 U5 ATMEL AT24C02N-10SC2.7 IC, SO, SOIC8, SERIAL EEPROM, 256 x 8, 2.7V 39 1 U6 MOTOROLA MC78M05CDT IC, SO, +5V REGULATOR, DPAK, 4%, 500mA 40 1 U7 TOSHIBA TC7SZ125FU IC, SSOP5-P-0.65A, single 3 state buffer, 2.6ns 41 1 U8 TOSHIBA TC7SZ126FU IC, SSOP5-P-0.65A, single 3 state buffer, 2.6ns 42 1 Y1 FOX FS24.576 XTAL, 24.
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