CRD4205-2 CrystalClear® PC Audio Docking Station Companion Board Features Description l Companion board to CRD4205-1 l Emulates Docking Station Environment The CRD4205-2 reference design is a companion card to the CRD4205-1. The CRD4205-2 emulates the audio sub-system in a PC digital docking station, and the CRD4205-1 simulates the audio sub-system in a PC notebook computer. – Simulates audio portion of PC docking station. – Digital Interface to CRD4205-1 l High quality, low cost analog to digital (ADCs) and digital to analog (DACs) converters – CS5334 18-bit serial ADCs – CS4334 24-bit serial DACs l PCI Slot card (power only) l Two stereo inputs l One microphone input l Four channel audio output This reference design features stereo analog inputs for Line, CD, and a mono input for Microphone. The card also has four channel analog audio outputs. The docking port is completely digital. The analog inputs in the CRD4205-2 are processed by high quality 18-bit serial ADCs. The analog outputs are processed by high quality serial 24-bit DACs. The CRD4205-2 is available by ordering the CMK42053 manufacturing kit. This kit includes a full set of schematics (OrCAD® 7.2 format), PCB job files (PADS® ASCII), PCB Gerber files, bill of materials and WDM audio drivers that support Windows 98se, Millennium® and Windows 2000. ORDERING INFORMATION CMK4205-3 Manufacturing Kit for the CRD4205-2 CD IN MIC IN LINE IN CS5331A JP1 LINE OUT1 CS4334 LINE OUT2 DOCKING PORT CS4205 CRD4205-1 CRD4205-2 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. 2000 (All Rights Reserved) DEC ‘00 DS489RD2A1 1 CRD4205-2 TABLE OF CONTENTS 1. 2. 3. 4. 5. 6. GENERAL INFORMATION .......................................................................... 3 SCHEMATIC DESCRIPTION ....................................................................... 3 2.1 Block Diagram ...................................................................................... 3 2.2 Analog Inputs ...................................................................................... 3 2.3 Analog Output ...................................................................................... 3 2.4 PCI Bus ............................................................................................... 4 2.5 Component Selection ........................................................................... 4 2.6 EMC Components ................................................................................ 4 GROUNDING AND LAYOUT ....................................................................... 4 REFERENCES ............................................................................................. 5 ADDENDUM ................................................................................................. 5 BILL OF MATERIALS ............................................................................ 15 Printed Circuit Board Assembly ................................................................. 15 Mechanical Assembly ................................................................................ 16 LIST OF FIGURES Figure 1. Block Diagram........................................................................................... 6 Figure 2. Analog In ................................................................................................... 7 Figure 3. Analog Out ................................................................................................ 8 Figure 4. PCI Bus ..................................................................................................... 9 Figure 5. Assembly Drawing .................................................................................. 10 Figure 6. Silkscreen................................................................................................ 11 Figure 7. Top Layer ................................................................................................ 12 Figure 8. Bottom Layer........................................................................................... 13 Figure 9. Drill Drawing............................................................................................ 14 LIST OF TABLES Table 1. Microphone Input Jumper JP1 ................................................................... 3 Contacting Cirrus Logic Support For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at: http://www.cirrus.com/corporate/contacts/ Microsoft, Windows 95, Windows 98 and Windows Millenium and WHQL is registered trademark of Microsoft. CrystalClear is a trademark of Cirrus Logic, Inc. Intel is a registered trademark of Intel Corporation. OrCAD is a registered trademark of OrCAD, Inc. PADS is a registered trademark of, PADS Software, Inc. Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirrus.com. 2 DS489RD2A1 CRD4205-2 1. GENERAL INFORMATION The CRD4205-2 is designed to emulate a high quality PC audio docking station. This is not a stand-alone card but used in conjunction with the CRD4205-1. The CRD4205-1 contains a CS4205 audio codec and simulates the audio sub-system in a PC notebook computer. The CRD4205-2 has all the circuitry typically found in a high quality PC digital docking audio sub-system. In addition, this reference design includes four channel analog audio outputs driven by 24-bit serial DACs. Microphone, stereo Line, and stereo CD inputs feature high quality serial 18-bit ADCs. 2. SCHEMATIC DESCRIPTION This section describes the CRD4205-2 schematics shown in figures 1 through 4. These schematics are also available in the CMK4205-3 manufacturing kit as ORCAD 7.2 files. 2.1 The MIC IN circuit complies with PC-99 requirements for microphone phantom power and recommendations for frequency response roll-off. The 3 dB roll-off frequencies are 60 Hz and 15 kHz. Phantom power for the microphones is derived from the +5 V analog supply and filtered by R11, C13, and R12. Jumper JP1 controls how the microphone signal is routed to the ADC, U3. JP1 Position Out 1-2 2-3 Analog Inputs The Analog Input page in Figure 2 illustrates the Mic, stereo Line and stereo CD inputs and their associated ADCs. The LINE inputs connect to a divider circuit that reduces the voltage by 6 dB to allow for line level sources up to 2 Vrms. The 100 pF capacitors are provided on Line In and Mic In for EMI suppression. These may be removed if EMC testing determines they are not required. Since the analog inputs of the CS5331 ADCs are DC biased, all of the analog inputs must be AC coupled. The microphone input is coupled with a 0.1 µF capacitor. The Line and CD inputs are AC coupled with 2.2 µF capacitors to minimize the low frequency roll-off. DS489RD2A1 Description Microphone signal routed to AINL of the CS5331A. The AINR is floating. Not Used! Microphone signal routed to both AINL and AINR of the CS5331A. Table 1. Microphone Input Jumper JP1 Block Diagram The block diagram in Figure 1, shows the interconnection between schematic pages. The schematic is divided into three blocks: Analog In, Analog Out, and PCI Bus. 2.2 The analog audio input signals are converted to digital data by three CS5331A 18-bit ADCs. The ADCs share a common clock, but have independent data outputs. The clock and serial data signals are routed to the docking port header. 2.3 Analog Output The CS4205 sends audio to the docking port through I2S serial digital outputs, as shown in figure 3. These signals are converted to analog audio through two CS4334 serial DACs. Both CS4334s share common clocks but have independent data inputs. All clocks originate from the CS4205 on the CRD4205-1 card. The output of the DACs are connected to a Motorola MC34072 dual op-amp which is capable of driving high impedance (10 kΩ or higher) line level signals. This circuit has a gain of 3 dB. It is possible to drive headphones with impedances as low as 32 Ω by replacing the MC34072 with a TDA1308 and increasing the values of C23, C24, C29, and C30 to 220 µF. These op-amps are pin compatable. 3 CRD4205-2 2.4 PCI Bus The PCI bus is only used to supply power to the board, so that an external supply is not required. The PCI bus connections are shown in Figure 4. The digital power is supplied from the PCI bus. A Motorola MC78M05C regulates the +12 V supply from the PCI bus down to a clean +5 V analog supply. For the best audio performance, the analog voltage regulator is located over the analog ground plane near the partition between the analog and digital planes. The regulator ground pin is connected to the analog ground. Figure 4 also shows the docking port header. This connector couples the serial data from the CRD4205-1 and is buffered by a 74HC244 octal buffer. 2.5 Component Selection Great attention was given to the particular components used on the CRD4205-2 board with cost, performance, 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 package. • Only single package components; no resistor packs. • All ICs are in surface mount packages. 2.6 EMC Components A number of capacitors and inductors are included to help the board meet EMI compliance tests, such as FCC Part 15. The EMC part values are only 4 meant as starting points. Modify these values to meet individual EMC requirements. 3. GROUNDING AND LAYOUT One of the most critical aspects of PC audio design is good PC board layout. The PC is a hostile environment for audio, and good layout is essential for achieving high audio quality. The CRD4205-2 is partitioned into a digital and analog sections to help isolate noisy digital circuitry from quiet analog audio circuitry. The most important rule for successful PC audio layout is to keep all digital signal traces and components over the digital ground plane, and all analog signal traces and components over an analog ground plane. These planes are separated by a minimum of 60 to 100 mils (0.060 to 0.100 inches). When digital and analog signals cross planes, they introduce noise into the audio section reducing performance. The CS4334 DACs and CS5331A ADCs are placed over the partition of the analog and digital ground planes. The ADCs and DACs both have their analog and digital signals partitioned to opposite sides of the ICs to help simplify PCB layout. Digital and analog ground are tied together by a wide trace (over 50 mils or 0.050 inches) at a single point underneath the converters in order to provide a common ground reference. For more information on layout specifically for the CS4334 and the CS5331A, see their respective datasheets. DS489RD2A1 CRD4205-2 4. REFERENCES 4) Cirrus Logic, CS4205 Data Sheet 1) Intel, Audio Codec ‘97 Component Specification, Revision 2.1, May 22, 1998. http://developer.intel.com/ial/scalableplatforms/audio/ 5) Cirrus Logic, CS4334/5/6/7/8/9 Data Sheet http://www.crystal.com/pubs/4334.pdf 2) Communication and Network Riser Specification revision 1.0, Feb 7, 2000 http://developer.intel.com/technology/cnr/ 3) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 1.0 http://www.crystal.com/pubs/meas100.pdf DS489RD2A1 6) Cirrus Logic, CS5330A/31A Data Sheet http://www.crystal.com/pubs/5330a.pdf 5. ADDENDUM • Schematic drawings • Layout drawings 5 6 Analog_In Analog_Out >Mic In DSMCK DSLRCK DSSCK DSMCK DSLRCK DSSCK Analog_In Line1 Out > SDATA1 SDATA2 >CD In DSSDI1 DSSDI2 DSSDI3 >Line In Line2 Out > Analog_Out Main Board > > > < < < SDATA1 SDATA2 DSMCK DSLRCK DSSCK DSSDI1 DSSDI2 DSSDI3 PCI_Bus Clocks SDO1 SDO2 SDI1 SDI2 SDI3 PCI_Bus CRD4205-2 DS489RD2A1 Figure 1. Block Diagram +5VA 6.8K R1 LINE IN J1 R4 4 3 5 2 1 U1 6.8K 6.8K 8 7 6 5 C 4 2.2uF ELEC + DS489RD2A1 R2 >Rt >Lt R3 6.8K C3 AINL VA+ AGND AINR SDATA SCLK LRCK MCLK + Dock CDIn C2 100pF NPO PHONO-1/8 +5VA Dock MicIn AGND DSSDI1 DSSDI2 DSSDI3 Vcc C1 100pF NPO DSSCK DSLRCK DSMCK Dock LineIn CS5331A 2.2uF ELEC 1 2 3 4 C12 0.1uF Z5U AGND Vee CGND +5VA +5VA MIC IN AGND J3 R12 2.2K R11 1.5K 4 R5 5 2 1 C9 100pF NPO PHONO-1/8 Connect CGND to AGND at the jack 100 C14 100pF NPO U3 C8 + C13 10uF ELEC C7 8 7 6 5 0.1uF X7R -3 dB corners at 60 Hz and 16 kHz (Ri = 28 k, Rs=350ohm) CD IN 1 2 3 4 JP1 1 2 3 CGND SDATA SCLK LRCK MCLK CS5331A 0.022uF X7R AGND AINL VA+ AGND AINR =Gnd RightIn =Left 3x1HDR AGND +5VA U2 L1 4 3 2 1 31@100MHz L2 C11 AINL VA+ AGND AINR SDATA SCLK LRCK MCLK 1 2 3 4 CS5331A 4.7uF ELEC + 31@100MHz LtCD L3 C5 2.2uF ELEC AGND + 31@100MHz Figure 2. Analog In 7 CRD4205-2 4X1HDR-AU 2.2uF ELEC + RtCD J2 C6 8 7 6 5 8 R24 33K +5VA DSSCK DSLRCK DSMCK SDATA DEM#/SCLK LRCK MCLK 3 R22 27K 2 U4A 1 + - R41 10uF ELEC 100 C25 100pF NPO MC34072D C35 SDATA2 R36 10K AGND + 10uF ELEC R37 C36 100pF NPO Vcc C21 22pF NPO R35 10K R21 + 6 - 27K U4B 7 R30 MC34072D AGND CGND 33K SDATA DEM#/SCLK LRCK MCLK AOUTL VA+ AGND AOUTR R44 C29 8 7 6 5 3 2 R28 27K + - U5A 1 R43 10uF ELEC 100 C31 100pF NPO MC34072D Vcc 33K C27 22pF NPO R27 27K 6 - U5B 7 MC34072D LINE OUT2 CGND CRD4205-2 DS489RD2A1 Figure 3. Analog Out PHONO-1/8 AGND AGND 8-pin Heaphone Amp (e.g. TDA1308)can be substituted for MC34072 R32 220K 2 1 Vee + R31 220K C32 100pF NPO C38 0.1uF Z5U AGND 5 Rt > Lt > 10uF ELEC +5VA R29 J22 4 100 + 1 2 3 4 22pF NPO CS4334 + C30 C28 U7 LINE OUT1 R26 220K AGND +5VA PHONO-1/8 C37 0.1uF Z5U 2.2K 5 R25 220K 2 1 C26 100pF NPO Vee SDATA1 33K Rt > Lt > 10uF ELEC +5VA R23 J21 4 100 C23 8 7 6 5 AOUTL VA+ AGND AOUTR R42 + 1 2 3 4 22pF NPO CS4334 + C24 C22 U6 Side A PCI BUS 5V A P1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 -12V TCK GND11 TDO +5V(8) +5V(9) INTB# INTD# PRSNT1# RSVD(4) PRSNT2# GND(12) GND(13) RSVD(5) GND(14) CLK GND(15) REQ# +5V(10) AD[31] AD[29] GND(16) AD[27] AD[25] +3.3V(7) C/BE[3]# AD[23] GND(17) AD[21] AD[19] +3.3V(8) AD[17] C/BE[2]# GND(18) IRDY# +3.3V(9) DEVSEL# GND(19) LOCK# PERR# +3.3V(10) SERR# +3.3V(11) C/BE[1]# AD[14] GND(20) AD[12] AD[10] GND(21) KEY3 KEY4 AD[8] AD[7] +3.3V(12) AD[5] AD[3] GND(22) AD[1] +5V(11) ACK64# +5V(12) +5V(13) J14 DS MicIn DS CDIn DS LineIn 13 11 9 7 5 3 1 /OBE DSMCK DSLRCK DSSCK SDATA1 SDATA2 n.c. (reserved) 7x2CON To Main Board DGND U9 2 4 6 8 DSSDI3 DSSDI2 DSSDI1 11 13 15 17 1 19 +12VD +5VA +5VD 20 U8 1A1 1A2 1A3 1A4 1Y1 1Y2 1Y3 1Y4 2A1 2A2 2A3 2A4 2Y1 2Y2 2Y3 2Y4 18 16 14 12 SDATA1 SDATA2 9 7 5 3 DSMCK DSLRCK DSSCK 1OE 2OE VCC GND 10 74HC244 1 C41 0.1uF Z5U + C42 10uF ELEC IN OUT 3 GND MC78M05C + C43 10uF ELEC DGND AGND Side B DGND 14 12 10 8 6 4 2 PCI BUS 5V B Figure 4. PCI Bus 9 CRD4205-2 TRST# +12V TMS TDI +5V(1) INTA# INTC# +5V(2) RSVD(1) +5V(3) RSVD(2) GND(1) GND(2) RSVD(3) RST# +5V(4) GNT# GND(3) PME# AD[30] +3.3V(1) AD[28] AD[26] GND(4) AD[24] IDSEL +3.3V(2) AD[22] AD[20] GND(5) AD[18] AD[16] +3.3V(3) FRAME# GND(6) TRDY# GND(7) STOP# +3.3V(4) SDONE SBO# GND(8) PAR AD[15] +3.3V(5) AD[13] AD[11] GND(9) AD[9] KEY1 KEY2 C/BE[0]# +3.3V(6) AD[6] AD[4] GND(10) AD[2] AD[0] +5V(5) REQ64# +5V(6) +5V(7) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 +5VD 2 DS489RD2A1 +12VD P2 10 CRD4205-2 DS489RD2A1 Figure 5. Assembly Drawing DS489RD2A1 11 CRD4205-2 Figure 6. Silkscreen 12 CRD4205-2 DS489RD2A1 Figure 7. Top Layer DS489RD2A1 13 CRD4205-2 Figure 8. Bottom Layer CRD4205-2 Figure 9. Drill Drawing 14 DS489RD2A1 DS489RD2A1 6. BILL OF MATERIALS PRINTED CIRCUIT BOARD ASSEMBLY Item Quantity Reference 9 2 3 4 5 6 4 1 5 1 8 7 8 4 1 C1,C2,C9,C14,C25,C26,C31. C32,C36. C3,C4,C5,C6. C7. C8,C12,C37,C38,C41. C11. C13,C23,C24,C29,C30,C35. C42,C43. C21,C22,C27,C28. JP1. 9 1 J1. 10 1 J2. 11 1 J3. 12 1 J14. 13 2 J21,J22. 14 15 16 17 18 19 20 21 22 23 24 25 26 27 3 1 1 4 1 2 4 4 4 2 5 3 2 2 L1,L2,L3. P1. P2. R1,R2,R3,R4. R11. R37,R12. R21,R22,R27,R28. R23,R24,R29,R30. R25,R26,R31,R32. R36,R35. R41,R42,R43,R44,R5. U1,U2,U3. U5,U4. U6,U7. 28 1 U8. 29 1 U9. CAP, 0805, COG, 100pF, 5%, 50V. . CAP, SMT A, ELEC, 2.2uF, 20%, 35V. CAP, 0805, X7R, .022uF, 10%, 50V. CAP, 0805, X7R, .1uF, 10%, 50V. CAP, SMT A, ELEC, 4.7uF, 20%, 25V. CAP, SMT B, ELEC, 10uF, 20%, 16V. . CAP, 0805, C0G, 22pF, 10%, 50V. HDR, 3x1, 0.025" PIN, 0.1" CTR. Manufacturer KEMET. . PANASONIC. KEMET. KEMET. PANASONIC. PANASONIC. . KEMET. SAMTEC. LZR ELECTRONCONN, 1/8" DOUBLE SW. STEREO PHONE JACK. ICS. HDR, 4X1, 0.025" PIN, 0.1" CTR, 15u" AU. MOLEX. LZR ELECTRONCONN, 1/8" SINGLE SW. STEREO PHONE JACK. ICS. CONN, 7x2 RIBBON, MALE, STRAIGHT, SHROUDED. AMP. LZR ELECTRONCONN, 1/8" NON-SW. STEREO PHONE JACK. ICS. IND, FBEAD, 1206, 31@100MHz, 25%. TDK. PCI BUS 5V SIDE B. . PCI BUS 5V SIDE A. . RES, SO, 0805, 6.8K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 1.5K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 2.2K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 27K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 33K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 220K, 5%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805, 10K, 1%, 1/10W, METAL FILM. PHILIPS. RES, SO, 0805,100, 1%, 1/10W, METAL FILM. PHILIPS. IC, CS5331A, 18-BIT ADC. CIRRUS LOGIC. IC, SO, SOIC8, 34072, SINGLE SUPPLY DUAL OP AMP. MOTOROLA. IC, SO, SOIC8, CS4334, DAC, STEREO. CIRRUS LOGIC. IC, SO, +5V REGULATOR, MC78M05C, DPAK, 4%, MOTOROLA. 500mA. IC, 74HC244. MOTOROLA. Manufacturer PN C0805C101J5GAC. . ECE-V1VS2R2SR. C0805C223K5RAC. C0805C104K5RAC. ECE-V1ES4R7SR. ECE-V1CA100R. . C0805C220K5GAC. TSW-103-07-T-S. SJ372. 70553-0003. SJ374. 103309-2. SJ373. HF50ACB321611-T. . . 9C08052A6801F. 9C08052A1501F. 9C08052A2201F. 9C08052A2702F. 9C08052A3302F. 9C08052A2203J. 9C08052A1002F. 9C08052A1000F. CS5331A-KS. MC34072D. CS4334-KS. MC78M05CDT. MC74HC244ADW. 15 CRD4205-2 1 Description DS489RD2A1 MECHANICAL ASSEMBLY Item Quantity Name Manufacturer PN 1 1 Printed Circuit Board (PCB). . CRD4205-2 Rev A. 2 1 PCI Bracket. Globe. . 3 1 Label. Internal Crystal. NA. Comments PN located in upper left corner of PCB. . Label content "CRD42052". CRD4205-2 16 • Notes •