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| CRD4297-1 AMR Advanced Product Databook FEATURES s AMR Audio Codec add-in card designed to meet the Intel(R) Audio/Modem Riser Specification s High quality, low cost, 2-layer, single sided adapter board s CS4297 SoundFusionTM Audio Codec '97 s Complete suite of Analog and Digital I/O connections: -- Line In, Line Out, Mic In, Modem Audio connection, CD Audio In, Video In, Aux In, Headphone Out and Optical Digital Out CrystalClearTM AC '97 AMR Audio Modem Riser Reference Design DESCRIPTION The CRD4297-1 AMR add-in board reference design showcases Cirrus Logic's Crystal Audio AC '97 CS4297 SoundFusion Audio Codec '97, and is Audio/Modem Riser Specification[2], compliant. The CRD4297-1 AMR card is 2.7" high by 3.6" long. The CRD4297-1 AMR reference design includes a customer ready manufacturing kit. Included in the kit are a full set of schematic design files (OrCAD(R) 7.2 format), PCB job files (PADS(R) ASCII), PCB artwork files, bracket drawings (Gerber), and bill of materials. The design is production ready as is, or can be easily modified to incorporate specific OEM changes. Documentation source files are available to assist the OEM to quickly provide an accurate end user manual. s Meets or exceeds Microsoft's(R) PC 97, PC 98, and PC 99, both required and advanced, audio performance requirements. ORDERING INFO CRD4297-1 AMR CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 Copyright (c) Cirrus Logic, Inc. 1998 (All Rights Reserved) DEC `98 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference GENERAL INFORMATION The CRD4297-1 AMR is a production-grade AMR audio card reference design using the CS4297 SoundFusion Audio Codec `97. The design supports the functionally compatible CS4297, CS4297A, or CS4299 AC `97 SoundFusion Audio Codecs. The AMR board advantage lies in the complete separation of the analog section from the noisy digital environment of a personal computer. A 5-wire digital link is all that is required to connect the audio codec to the AMR bus-based AC `97 controller. This allows the audio section to reach the required dynamic range of ~90 dB FS A while making the layout and placement of the audio section easier to implement. The CS4297 performs the Digital-toAnalog Conversion (DAC) for the digital audio output stream and also provides multiple analog audio inputs and outputs, analog mixing and Analog-to- Digital Conversion (ADC). This card is designed to provide the highest possible functionality, along with industry leading audio performance at a low manufacturing cost. Care was taken with component placement and signal routing to minimize sources that can degrade audio performance. Cirrus' analog design know-how has resulted in a board that preserves the exceptional analog performance of the CS4297. REFERENCE DESIGN FEATURES The CRD4297-1 AMR reference design illustrates a high quality, low cost two-layer add-in card layout. The card is sectioned into three main parts: the AMR bus section, the CS4297 Audio Codec `97 section, and the Analog I/O section. Digital Audio Out The AMR bus provides digital out in a format compatible with the consumer portion of IEC 958. An older version of this standard is also known as S/PDIF. Depending upon the codec, the SPDIF signal originates either from the AMR bus or the codec. Digital out is provided through a Toshiba TOTX173 optical TOS-LINK jack on the board edge. There are many advantages in using a Fiber optic link versus the traditional coaxial link. Fiber optic is a non-metallic insulator thereby preventing ground loops and electromagnetic interference. For signal transmission, it offers low attenuation, high bandwidth, low propagation delay, low bit error rates, small size, and cost efficiency. The signal is IEC 958 and CP-1201 compliant. CS4297 Audio Codec `97 The CS4297 is a mixed-signal serial Codec based on the AC `97 specification. It is designed to be paired with a digital controller, located on the AMR bus. The AC `97 Controller is responsible for all communications between the CS4297 and the rest of the system. The CS4297 functions as an an- SoundFusion and CrystalClear are trademarks 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. Microsoft, Windows, and DirectX are registered trademarks of Microsoft Corporation. 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). 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. CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 2 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference alog mixer, a stereo ADC, a stereo DAC, and a control and digital audio stream interface to the AC `97 controller. The CS4297 contains two distinct functional sections: digital and analog. The digital section includes the AC-link registers, power management support, SYNC detection circuitry, and AC-link serial port interface logic. The analog section includes the analog input multiplexer (mux), stereo output mixer, mono output mixer, stereo ADCs, stereo DACs, and analog volume controls. This section contains the components for the various analog audio connections, and the 24.576 MHz crystal master clock. For more information refer to the CS4297 Data Sheet [3]. The capacitors required for the CS4297 and their placement are discussed in the CS4297 Data Sheet [3]. Refer to the Grounding and Layout section of the data sheet for the recommended routing of the audio section. header and its associated components may or may not be necessary depending on the audio inputs implemented. Audio I/O A full feature set of the CS4297's analog I/O and digital out is represented on the reference design card through internal and external connectors: * * * * * * * * * Line Out Headphone Out Line In Mic In CD Audio In Aux In Video In Modem Audio connection Optical Digital Out Power Requirements The CS4297 requires both a digital +3.3 V and an analog +5 V supply. The digital power is supplied from the AMR bus. A voltage regulator is recommended for the analog supply. A Motorola MC78L05 regulates the AMR +12 V supply down to provide a clean +5 V analog supply for the CS4297. The MC78L05 regulator can provide adequate current, which is enough for the CS4297 and associated analog circuitry. Four external 1/8" jacks, one external TOS-LINK jack, and four internal header connections are used for analog and digital inputs and outputs. Line Out The output of the CS4297 is capable of driving impedances greater than 10 k with a maximum output voltage of 1 Vrms. The Line Out connection is made via an external 1/8" jack. * Maximum output level: 1 Vrms Analog I/O The CS4297 has many analog inputs and outputs that may or may not be used depending on the system's application. Unused inputs should be tied to Vrefout (pin 28) or capacitively coupled via 0.1 F to the analog ground plane. The analog section contains the components for a headphone amplifier. The Modem Audio, CD In, Audio In, and Aux In headers are also part of the Analog I/O section. The Headphone Out An external 1/8" jack provided for a headphone connection. This output is driven by an amplifier for low impedance loads such as 32 headphones. * * Maximum output level: 2.0 Vrms (no load); 1.5 Vrms (32 load) Maximum output power: 70 mW/channel (32 load) CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 3 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference Line In The Line In 1/8" jack provides an input to the Line In pins of the CS4297. * Maximum input level: 2 Vrms * Maximum input level: 2 Vrms Video In * Internal 4-pin (0.1 inch center) right-angled connector * Pin 1 : Left Channel Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Right Channel Mic In The Microphone In 1/8" jack provides an input to a microphone pre-amplifier circuit that applies 18 dB of gain to the signal. * Maximum input level: * Microphone Boost enabled: 12.5 mVrms Microphone Boost disabled: 125 mVrms Maximum input level: 2 Vrms Modem Audio Connection The modem audio connection can be made through the internal 4-pin (0.1 inch center) right-angled connector. This connector carries both a mono input and a mono output. * Internal 4 pin header (0.1 inch center) * * * Pin 1 : Mono Out (to modem) Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Phone In (from modem) Supports 3-pin electret (power on ring) and 2pin dynamic microphones CD Audio In The CD Audio input provides a 4-pin (0.1 inch center) right-angled connector that is compatible with the SONY standard. * * * Maximum input level: 2 Vrms Differential input using the CD Common pin as the ground 0.1 inch connector wired as: - Pin 1 : Left Channel Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Right Channel Maximum input level: 1 Vrms Maximum output level: 1 Vrms Minimum load impedance: 10 k SCHEMATIC DESCRIPTION Figures 11 through 17 show the schematics for the CRD4297-1 AMR card. This section will describe particular pages of the schematic that need to be discussed. Aux In * * Internal 4-pin (0.1 inch center) right-angled connector Wired as: - Pin 1 : Left Channel Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Right Channel Figure 11: Block Diagram The block diagram is an interconnection overview between schematic pages. Figure 12: AMR Bus Interface The +5 V power pin is decoupled through C1 and supplies power for the SPDIF_OUT circuit. All CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 4 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference ground pins are tied to digital ground except for B2, which is tied to analog ground. The AC-link, which consists of ASDOUT, ARST#, ASYNC, ASDIN, and ABITCLK, transfers digital audio data between the audio codec and the host. PC_BEEP_BUS routes the motherboard beep/speaker signal from the motherboard to the audio subsystem, for use in hearing POST codes (refer to the Intel Audio/Modem Riser Specification [2]). The PRIMARY_DN# signal indicates the presence or the absence of a primary codec on the motherboard. The MSTRCLK is the 24.576 MHz master clock for the AC `97 link. Populate R51 since the CS4297 is always the primary codec. Populate R50 for CS4297A/99, when they are the secondary codec. The CS4297 does not support S/PDIF, R3 is populated so the S/PDIF signal originates from the AMR bus. For a CS4297A/99 by populating R2 instead of R3, the SPDIF_CODEC signal is directly routed to the S/PDIF circuit, bypassing the AMR bus. added next to pins 25 and 26 if the capacitor connected to the output of the power regulator is located far away from the CS4297. All filtering capacitors of audio signals are NPO-type to ensure minimal added distortion. Two footprints are provided for the crystal XTAL: a CA-301 pin-in-hole footprint, Y1, for miniature crystal; and a standard HC-49U package, Y2. The HC-49U package can be bent over and soldered to the card. R47 is a termination resistor in the serial AC-link between the CS4297 and the AMR bus. Figure 15: Analog Inputs The inputs for AUX, VIDEO, CD, and LINE are passed through a divider circuit that reduces the voltage by 6 dB to allow connection of line level sources up to 2 Vrms. The 220 pF capacitors are provided on Line_In, Mic_In, CD_In, Aux_In, Video_In, and Internal Modem connection for EMC suppression. These may be removed if EMC testing determines they are not required. 1 F ACcoupling capacitors are used on the Line_In, Mic_In, CD_In, Aux_In, Video_In, and Internal Modem circuit to minimize the low frequency rolloff. The internal CD audio connection utilizes a pseudo-differential interface with CD_GND as the common return path for both the left and right channels. Therefore, the input impedance of this block is half of that of the other inputs. The modem connection is both a mono input and output. The output is fed from the CS4297's MONO_OUT pin through a divider made of R22/23. The divider ratio is preset to 0 dB for an output voltage of 1 Vrms. If a lower output voltage is desired, the resistors can be replaced with appropriate values, as long as the total load on the output is kept greater than 10 k. The input is not divided to accommodate line level sources up to 1 Vrms. Figure 13: Power Supply The CS4297 requires both a digital +3.3 V and an analog +5 V supply. The digital power is supplied from the AMR bus. A separate regulator is recommended for the analog voltage supply to provide good audio signal quality. A Motorola MC78L05 regulates the +12 V supply from the AMR bus down to a clean +5 V analog supply. Two packaging options are supported, where U5 is an SO8 surface mount package and U4 is a TO-92 pin-in-hole package. The -12 V power pin is decoupled through C73/C74, and supplies power to the headphone circuit. Figure 14: CS4297 AC `97 Audio Codec For the best audio performance, the analog voltage regulator, an MC78L05, is located near the CS4297. A 10 F electrolytic capacitor should be DS242RD1B1 Figure 16: Audio Outputs The line out is driven directly by the CS4297. The headphone out amplifier, a Motorola MC1458, is CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 5 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference capable of driving stereo headphones with impedances greater than 32 or powered speakers. R37/38 are added for short-circuit protection. An optical S/PDIF (IEC 958 consumer) output is also supported. EMC Components A number of capacitors and inductors are included to help the board meet EMC compliance tests, such as FCC Part 15. Modifying this selection of components without EMC testing could cause EMC compliance failure. Figure 17: Microphone Pre-amp and Bias A Motorola MC33078D low noise dual op-amp provides an +18 dB gain stage for the microphone and buffers the phantom power supply for the mic. The phantom power is derived from the +5 V analog supply and buffered by U1A to provide a maximum of 4.2 V with no load and a minimum of 2.0 V under a 0.8 mA load on the ring, as required by the PC 99 System Design Guide, Chapter 17, Audio Components [5]. GROUNDING AND LAYOUT Partitioned Voltage and Ground Planes The pinout of the CS4297 allows the ground split to completely separate digital signals on one side and analog signals on the other. This split is located very close to the CS4297 so analog and digital ground return currents originating from the CS4297 may flow through their respective ground planes. A bridge is made across the split to maintain the proper reference potential for each ground plane. The area around the crystal oscillator and the two XTAL signals is filled with copper on the top and bottom sides and attached to digital ground. This ground plane serves to keep noise from coupling onto these pins. All data converters are highly susceptible to noise on the crystal pins. A separate chassis ground provides a reference plane for all of the EMC components. The chassis ground plane is connected to the analog ground plane at the external jacks. Component Selection Great attention was given to the particular components on the CRD4297-1 AMR 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 use single package components, no resistor packs right-angled headers for all internal connections to provide sufficient headroom for the jacks dual footprint for XTAL. Standard H49U with GND pad and small circular CA-301 pin-inhole package Dual footprint for +5 V and +3.3 V regulators. Surface mount and pin-in-hole package are supported. * CS4297 Layout Notes Please refer to the CS4297 Data Sheet [3] on how the area under the chip should be partitioned and how the bypass capacitors should be placed. Pay close attention to the suggestions for the bypass capacitors on REFFLT, AFLT1, AFLT2, and the power supply capacitors. The pinout of the CS4297 is designed to keep digital and analog signals from crossing when laying out the board. * CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 6 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference AUDIO PERFORMANCE EVALUATION Signal Name Line In Mic In Line Out Speaker Out (8) Connector Jack Jack Jack N/A Maximum Voltage 2.341 VRMS 0.146 VRMS 1.058 VRMS N/A Reference Designator 0 dB FS (li) 0 dB FS (mi) 0 dB FS (lo) 0 dB FS(so) N/A N/A Imp. (k) In the above reference designators, the letters in parenthesis designate the full-scale value for that particular I/O. These are used in the tables below to Microphones Supported 3-Pin Phantom Power (power on ring) 2-Pin Dynamic 2-Pin Phantom Power (power on tip) Support Yes Yes help clarify which full-scale value applies to the particular measurement. Values referenced to digital numbers on the PC are listed with the (d) suffix. Comments Full Duplex (A-D-PC-D-A): Line In to Line Out Reference Left Dynamic Range 83.8 THD+N -3 dB FS (li) -81.1 Frequency Response Ac = -0.25 dB 20-20k NOTE: TM004: combined test used in lieu of TM002 and TM003 Analog Mixer (A-A): Line In to Line Out Dynamic Range THD+N Frequency Response Crosstalk Analog Mixer (A-A): Mic In to Line Out Dynamic Range THD+N Frequency Response NOTE: Mic In is Mono Right 83.8 -80.5 31-20k Units dB FS A (lo) dB FS (lo) Hz Figures 97 - 1NXL 97 - 1DXL 97 - 1MXL Reference -3 dB FS (li) Ac = -0.1 dB f = 10 kHz Left 95.4 -91.2 20-20k -66.7 Right 95.3 -90.6 20-20k N/A Units dB FS A (lo) dB FS (lo) Hz dB FS (lo) Figures 97 - 1NAL 97 - 1DAL 97 - 1MAL 97 - 1CAL Reference Gain = 0 dB -3 dB FS (mi) Ac = -3 dB Left 93.9 -85.9 58-15.5k Right N/A N/A N/A Units dB FS A (lo) dB FS (lo) Hz Figures 97 - 1NAM 97 - 1DAM 97 - 1MAM Plots In the following plots, stereo measurements have two sets of data per plot and two vertical axes. Above each vertical axis is a label indicating a channel that relates to that axis. The data set extends beyond the vertical axis to indicate its association with that axis. Using Figure X as an example, the top set of data extends beyond the right vertical axis, which is labeled at the top "RIGHT', indicating that the top set of data is the right channel and associated with the right vertical axis. Likewise, the bottom set of data extendds beyond the left vertical axis which is labeled at the top "LEFT", indicating that the bottom set of data is the left channel and associated with the left vertical axis. 7 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CwGRAPH 0.65 LEFT 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) 97-1\97-1MXL.ADX RIGHT 6 5 4 3 2 1 0 -1 -2 -3 -4 20 k Amplitude (dB) Dynamic Range (dB FS A) 100 1k Frequency (Hz) 10 k Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response CwGRAPH 0.65 LEFT -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1NXL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k 100 1k Frequency (Hz) 10 k Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 8 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CwGRAPH 0.65 LEFT -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1DXL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k THD+N (dB FS) Amplitude (dB) 100 1k Frequency (Hz) 10 k Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency CwGRAPH 0.65 LEFT 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) 97-1\97-1MAL.ADX RIGHT 6 5 4 3 2 1 0 -1 -2 -3 -4 20 k 100 1k Frequency (Hz) 10 k Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 9 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CwGRAPH 0.65 LEFT -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1NAL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k Dynamic Range (dB FS A) THD+N (dB FS) 100 1k Frequency (Hz) 10 k Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range CwGRAPH 0.65 LEFT -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1DAL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k 100 1k Frequency (Hz) 10 k Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 10 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CwGRAPH 0.65 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) 97-1\97-1MAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response CwGRAPH 0.65 -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1NAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 11 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CwGRAPH 0.65 -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) 97-1\97-1DAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency CwGRAPH 0.65 -50 -55 -60 -65 Crosstalk (dB) -70 -75 -80 -85 -90 -95 -100 20 CrystalWare(tm) 97-1\97-1CAL.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 12 DS242RD1B1 CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference REFERENCES 1) Intel, Audio Codec `97 Component Specification, Revision 2.1, http://developer.intel.com/pc-supp/ platform/ac97/ 2) Intel, Audio/Modem Riser Specification, Revision 1.01, Sep 10, 1998. http://developer.intel.com/pcsupp/platform/ac97/INDEX.HTM 3) Cirrus Logic, CS4297 SoundFusion Audio Codec `97 Data Sheet, July 1998. http://www.cirrus.com/products/overviews/ cs4297.html 4) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 0.5 http://www.cirrus.com/products/papers/ meas/meas.html 5) Intel and Microsoft, PC 99 System Design Guide http://www.microsoft.com/hwdev/desguid/ 6) M. Montrose. Printed Circuit Board Design Techniques for EMC Compliance, IEEE Press, New York: 1996. ADDENDUM * * * * Schematic drawings Layout drawings Bracket drawing Bill of materials CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 13 PC_BEEP_BUS M S T R C LK PC_BEEP_BUS P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT S/PDIF_CODEC AUDIO_IN PC-BEEP-BUS CS4297 P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT MSTRCLK PC_BEEP PC_BEEP S/PDIF_CODEC PC_BEEP SPDIF_CODEC P R I M A RY _ D N # A R S T# ASYNC ABITCLK ASDIN ASDOUT MSTRCLK CD_INL CD_COM CD_INR LINE_IN_L LINE_IN_R AUX_INL AU X _ I N R VIDEO_L VIDEO_R CD_INL CD_COM CD_INR LINE_IN_L LINE_IN_R AUX_INL AU X _ I N R VIDEO_L VIDEO_R CD_INL CD_COM CD_INR LINE_IN_L LINE_IN_R AUX_INL AU X _ I N R VIDEO_L VIDEO_R LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R PHONE_IN MONO_OUT AUDIO_IN PHONE_IN MONO_OUT CS4297 MIC1 AUDIO_MICIN POWER MIC1 PHONE_IN MONO_OUT AU D I O _ O U T SPDIF_OUT AUDIO_MICIN POWER Figure 11. Block Diagram MIC1 14 AMR_BUS S/PDIF_OUT SPDIF_OUT AMR_BUS CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 AU D I O _ O U T CrystalClearTM AC '97 AMR Audio Modem Riser Reference CRD4297-1 AMR 1 1 1 + + C2 0.1uF Z5U 2 C3 10UF 2 1 DS242RD1B1 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 15 CrystalClearTM AC '97 AMR Audio Modem Riser Reference CRD4297-1 AMR H O LE M1 H O LE M2 TO O L H OLE M3 AMR BUS P1 B1 AGND B2 B3 -12VD B4 B5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 R3 0 S/PDIF_OUT CGND AU D I O _ M U T E # GND MONO_OUT/PC_BEEP RSVD RSVD P R I M A RY _ D N # -12V GND +12V GND +5VD AU D I O _ P W R D N MONO_PHONE RSVD RSVD RSVD GND +5Vdual/+5VSB USB_OC GND USB+ USB- P C _BEEP_BUS P R I M A RY _ D N # B6 B7 +3.3VD +5VD +12VD B8 B9 B10 B11 populate R2 for CS4299 board populate R3 for CS4297 board R2 0 S/PDIF_CODEC KEY KEY B12 B13 B14 B15 B16 AS DOUT ARST# B17 B18 B19 B20 B21 B22 MSTRCL K B23 GND RSVD RSVD +3.3VD GND A C 9 7 _ S DATA _ O U T AC97_RESET# AC 9 7 _ S DATA _ I N 3 GND AC 9 7 _ S DATA _ I N 2 GND AC97_MSTRCLK A M R C O N N E C TO R DGND KEY KEY GND S/PDIF_IN GND +3.3Vdual/+3.3VSB GND AC97_SYNC GND AC 9 7 _ S DATA _ I N 1 GND AC 9 7 _ S DATA _ I N 0 GND AC 9 7 _ B I T C L K A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 ABITCLK R51 47 R50 47 ASYNC ASDIN populate R51 if primary AMR device. populate R50 if secondary AMR device. DGND +3.3VD +5VD C1 10UF DGND DGND Figure 12. AMR Bus 16 POWER SUPPLIES Do not populate U5 M C 7 8 L 0 5 AC D U5 5 6 7 AGND 8 +12VA +12VD L2 3 31@100MHz U4 C70 + 100uF C71 0.1uF Z5U MC78L05 + CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 NC2 GND3 GND4 VIN NC1 GND2 GND1 VO U T 4 3 2 AGND 1 -12VD +5VA -12VA L1 31@100MHz C73 C72 10UF 100uF C74 0.1uF Z5U S U R FA C E M O U N T P O P U L AT I O N OPTION CrystalClearTM AC '97 AMR Audio Modem Riser Reference IN OUT 1 PIN IN HOLE P O P U L AT I O N OPTION AGND AGND Connect AGND to DGND with a 50 mil trace near the 4297 Connect CGND to DGND with a 50 mil trace near the finger edge of the board. CRD4297-1 AMR Figure 13. Power Supplies 3 DS242RD1B1 +3.3VD +5VA C51 0.1uF Z5U C52 0.1uF Z5U C53 0.1uF C54 0.1uF Z5U C55 680pF NPO C56 680pF NPO C57 680pF NPO C58 680pF NPO C59 680pF NPO CrystalClearTM AC '97 AMR Audio Modem Riser Reference CRD4297-1 AMR CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 17 DGND AGND +3.3VD +5VA 25 38 U3 CS4297 AV d d 1 AV d d 2 DV d d 1 DV d d 2 XTL_IN XTL_OUT S DATA _ I N SYNC RESET# PC_BEEP PHONE AU X _ L AU X _ R VIDEO_L VIDEO_R CD_L CD_GND CD_R MIC1 MIC2 LINE_IN_L LINE_IN_R R E F F LT Vrefout A F LT 1 A F LT 2 BIT_CLK S DATA _ O U T LINE_OUT_L LINE_OUT_R MONO_OUT A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R NC1 F LT 3 D FLTI F LTO NC5 NC6 NC7 ID0# ID1# EAPD S/PDIF_OUT 6 5 35 36 37 39 41 31 32 33 34 40 43 44 45 46 47 48 AV s s 1 AV s s 2 DV s s 1 DV s s 2 26 42 4 7 AGND D O N OT P O P U L AT E R 4 5 MSTRCLK R45 0 layo ut Y1 on top of Y2 -- p opulate only one XTAL Y1 24.576 MHz ASDIN ASYNC ARST# 1 9 2 3 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 27 28 29 30 DGND R47 47 AGND ABITCLK ASDOUT LINE_OUT_L LINE_OUT_R MONO_OUT A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R Do not populate C62, C63 and R48 for CS4297. Polpulate C62, C63 and R48 for CS4299 1 Y2 C60 22pF 2 22pF PC_BEEP PHONE_IN AUX_INL AUX_INR VIDEO_L VIDEO_R C61 CD_INL CD_COM CD_INR MIC1 LINE_IN_L LINE_IN_R C62 1000pF NPO C63 X7R 0.01uF DGND AGND R48 0 C64 1.0uF C65 0.1uF Z5U C66 1.0uF C67 0.1uF Z5U C68 390pF NPO C69 390pF NPO P R I M A RY _ D N # S/PDIF_CODEC AGND Figure 14. CS4297 18 CD IN J1 R4 4 R7 6.8 K 3 6.8 K C4 1uF CD_INR X7R VIDEO IN J2 4 R GND R 3 R5 R6 6.8 K 6.8 K C5 1uF X7R VIDEO_R GND 2 1 AGND R8 6.8 K C8 R9 6.8 K 1uF CD_INL X7R 2 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 GND L GND 1 L 4 X 1 H D R-AU C10 AGND C11 220pF 220pF AGND R10 R11 6.8 K 6.8 K C9 1uF X7R 4 X 1 H D R-AU VIDE O_L AGND R12 R13 C16 220pF C17 2 2 0pF C18 220pF 3.4 K C13 3.4 K 1uF X7R CD_C OM AGND AGND CrystalClearTM AC '97 AMR Audio Modem Riser Reference AGND J3 AUX IN R 4 3 2 AGND 1 4 X 1 H D R-AU AGND 2 2 0pF 2 2 0pF AGND R20 R21 6.8 K 6.8 K C25 1uF X7R CGND AGND 220pF LINE_IN_L 2 2 0pF C23 C24 X7R R18 R19 6.8 K 6.8 K C20 1uF R14 R15 6.8 K 6.8 K C14 1uF X7R AUX_I NR R16 R17 6.8 K 6.8 K C15 1uF X7R LINE IN J4 4 3 5 2 1 P H O N O - 1 /8 GND LINE_IN_R GND L C21 C22 AU X _INL Connect CGND to AGND at the jack AGND PC SPEAKER IN C26 P C - B EEP-BUS 0.1uF Z5U P C _BEEP INTERNAL MODEM CONNECTION J5 R31 47K PHONE IN GND GND MONO OUT 4 R22 3 2 1 4 X 1 H D R-AU AGND C12 2 2 0pF C19 2 2 0pF 0 C28 C29 X7R 1uF 1uF X7R PHONE_IN AGND MONO_OUT CRD4297-1 AMR R23 47K R24 47K AGND AGND AGND Figure 15. Audio In DS242RD1B1 C40 A LT _ L INE_OUT_R 1 10UF 2 R35 27K AGND CrystalClearTM AC '97 AMR Audio Modem Riser Reference CRD4297-1 AMR C41 R36 56K 2 2 pF -12VA 2 1 3 +12VA U2A MC14 58 C43 R40 56K 1/4 W -12VA P H O N O - 1 /8 C44 C45 AGND 6 7 5 +12VA AGND U2B MC14 58 CGND S P D I F _ O UT J10 5 +5VD R49 8.2 K 4 3 C50 0.1uF Z5U 2 1 6 TO TX-173 DGND DGND DGND 2 2 0pF 2 2 0pF 2 2 pF R38 10 1/4 W 4 3 5 2 1 J7 R37 10 HEADPHONE JACK CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 19 C42 A L T_LINE_OUT_L 1 10UF 2 R39 27K Connect CGND to AGND at the jack Digital Output C46 L I N E _ O U T_R 1 10UF C47 LINE_ OUT_L 1 10UF P H O N O - 1 /8 R43 100 K R44 100 K 2 2 J9 4 3 5 2 1 LINE OUT JACK C48 2 2 0pF C49 220pF AGND Connect CGND to AGND at the jack AGND CGND Figure 16. Audio Out 8 R26 68 K AGND 4 1 2 8 + 1 2 2 0pF 2 2 0pF +5VA AGND AGND CGND place close to pins 8 and 4 C30 0.1uF Z5U 2 C38 AGND R34 2 2 0pF 47 K AGND 4 20 +5VA +5VA U1A M C 33078D 3 2 + R25 47 K CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 1 + - C31 10UF AGND R27 47 K R28 10 0K AGND CrystalClearTM AC '97 AMR Audio Modem Riser Reference R29 AGND 47K J6 4 3 5 2 1 P H O N O - 1 /8 R32 2.7 K +5VA C33 0.068 u F X7R R33 6.8 K 6 U1B M C 33078D 7 C34 1uF X7R MIC1 5 + - Connect CGND to the jack C35 C36 C37 10UF CRD4297-1 AMR Figure 17. Mic Pre-Amp CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 21 Figure 18. Assembly Drawing CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 22 DS242RD1B1 Figure 19. Top Layer CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 23 Figure 20. Bottom Layer CRD4297-1 AMR CrystalClearTM AC '97 AMR Audio Modem Riser Reference CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 24 DS242RD1B1 Figure 21. Bracket Drawing BILL OF MATERIALS CRD4297-AMR Item Qty 1 2 9 12 25 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1 Reference C1,C3,C31,C37,C40,C42, C46,C47,C72 C2,C26,C30,C50,C51,C52, C53,C54,C65,C67,C71, C74 C4,C5,C8,C9,C13,C14,C15, C20,C25,C28,C29,C34 C10,C11,C12,C16,C17,C18, C19,C21,C22,C23,C24, C35,C36,C38,C44,C45, C48,C49 C33 C41,C43 C55,C56,C57,C58,C59 C60,C61 C64,C66 C68,C69 C70,C73 J1,J2,J3,J5 J4,J6,J7,J9 J10 L1,L2 M1,M2 M3 P1 R3,R22 R4,R5,R6,R7,R8,R9,R10, R11,R14,R15,R16,R17, R18,R19,R20,R21,R33 R12,R13 R23,R24,R25,R27,R29, R31,R34 R26 R28,R43,R44 R32 R35,R39 R36,R40 R37,R38 R47,R51 Value 10UF 0.1uF Type ELELCT Z5U PCB-Footprint ALUM/10UF/16P CSN_0805 Mnfr Part Number Description ALUM ELECT,10uF,20%,16V,POL PANASONIC ECA-1CM100 KEMET C0805C104M5UAC CAP, 0805, Z5U, .1uF, 20%, 50V 3 4 12 18 1uF 220pF X7R COG CSN_1206 SMT_0805 VENKEL KEMET C1206X7R500CAP, 1206, X7R, 1uF, 10%, 25V 105KNE C0805C221J5GAC CERM CAP,220pF,5%,50V,COG 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 5 2 2 2 2 4 4 1 2 2 1 1 2 17 0.068 uF 22pF 680pF 22pF 1.0uF 390pF 100uF 4X1HDR-AU PHONO-1/8 TOTX-173 31@100MHz HOLE TOOLHOLE AMR CONNECTOR 0 6.8K X7R COG NPO COG Y5V NPO ELECT CONN CONN CONN FERRITE CSN_0805 SMT_0805 SMT_0805 CC0805 SMT_1206 C0805C683K5RAC CAP, 0805, X7R, 68000pF, 10%, 50V C0805C220GAC CERM CAP,22pF,5%,50V,COG KEMET C0805C681J5GAC CERM CAP, 680pF, 5%, 50V,COG CAP,22pF,SO,0805,5%,50V,COG MURATA GRM42CERM CAP,1.0UF,25V,Y5V 6Y5V105Z016BL SMT_0805 KEMET C0805C391J5GAC CERM CAP,390pF, 5%, 50V,COG PIH PANASONIC ECA-1CM101 ALUM ELECT, 100uF,20%,16V,POL CON_MLX_70553 MOLEX 70553-0003 HDR, 4X1, 0.025" PIN, 0.1" CTR, 15u" AU CON_STEREO_LZR LZR ELEC- SJ372 CONN, 1/8" DOUBLE SW. STEREO PHONE TRONICS JACK TOTX173 TOSHIBA TOTX173 OPTICAL TOSLINK TRANSMITTER IND_FB1206 TDK HF50ACB321611-T IND, FBEAD, 1206, 31@100MHz, 25% TOOLHOLE AMR5V-46 KEMET CrystalClearTM AC '97 AMR Audio Modem Riser Reference RES RES RES_0805 RES_0805 PHILIPS PHILIPS 9C08052A0R00J 9C08052A6801F RES, SO, 0805, 0.5%, 1/10W, METAL FILM RES, SO, 0805, 6.8K, 1%, 1/10W, METAL FILM 21 22 23 24 25 26 27 28 29 2 7 1 3 1 2 2 2 2 3.4K 47K 68K 100K 2.7K 27K 56K 10 47 RES RES RES RES RES RES RES RES RES RES_0805 RES_0805 RES_0805 RES_0805 RES_0805 RES_0805 RES_0805 RES_1206 RES_0805 PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS 9C08052A3401F 9C08052A4702J 9C08052A6802J 9C08052A1003J 9C08052A2701J 9C08052A2702J 9C08052A5602J 9C12063A10R0J 9C08052A47R0J RES, SO, 0805, 3.4K, 1%, 1/10W, METAL FILM RES, SO, 0805, 47K, 5%, 1/10W, METAL FILM RES, SO, 0805, 68K, 5%, 1/10W, METAL FILM RES, SO, 0805, 100K, 5%, 1/10W, METAL FILM RES, SO, 0805, 2.7K, 5%, 1/10W, METAL FILM RES,27K,SO,0805,5%,1/10W,METAL FILM RES,56K,SO,0805,5%,1/10W,METAL FILM RES, SO, 1206, 10, 5%, 1/4W, METAL FILM RES, SO, 0805, 47, 5%, 1/10W, METAL FILM CRD4297-1 AMR DS242RD1B1 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK 26 Item Qty 30 31 32 33 34 35 1 1 1 1 1 1 R49 U1 U2 U3 U4 Y1 Reference Value 8.2K MC33078D MC1458 CS4297 MC78L05 24.576 MHz Type RES OP AMP SO8 CODEC PCB-Footprint RES_1206 SO8 SO8 QFP48_7X7 Mnfr Philips MOTOROLA MOTOROLA CRYSTAL SEMICOND. MOTOROLA EPSON Part Number 9C12063A820J MC33078D MC1458 CS4279 Description RES,8.2k,SM1206,5%,1/4W IC, SO, SOIC8, 33078, DUAL OP AMP DUAL HEADPHONE AMP IC, SO, AC '97 2.0 SERIAL CODEC w/ SRC CrystalClearTM AC '97 AMR Audio Modem Riser Reference CRD4297-1 AMR VREG TO-92 PAR RES, FUND XTL_CA-301 MC78L05AC 5V POS.VOLT.REG., 100ma CA-301_24.576M-C XTL, 24.576MHz, FUND, PAR RES DO NOT POPULATE Item Qty 1 2 3 4 5 6 1 1 1 3 1 1 Reference C63 C62 R50 R2,R45,R48 Y2 U5 Value 0.01uF 1000pF 47 0 24.576 MHz CAP CAP RES RES Type PCB-Footprint CSN_0805 SMT_0805 RES_0805 RES_0805 XTALHC49PAD SO8 Mnfr KEMET KEMET PHILIPS PHILIPS EPSON Part Number C0805C103K5RAC C0805C102J5GAC 9C08052A47R0J 9C08052A0R00J Description CERM CAP, .01uF, 10%, 50V,X7R CERM CAP, 1000pF, 5%, 50V,COG RES, SO, 0805, 47, 5%, 1/10W, METAL FILM RES, SO, 0805, 0, 5%, 1/10W, METAL FILM CRYSTAL, 24.576MHz, H49-US TYPE, Fund Mode Par Res 5V POS. VOLT. REG., 100ma MC78L05ACD VREG MOTOROLA MC78L05ACD * Notes * |
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