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CRD4610-1
Advanced Product Databook
FEATURES
s PCI Audio Accelerator card designed to meet AC '97 specifications s 4-layer single sided planar example board s CS4610 SoundFusionTM PCI Audio Accelerator s CS4297 SoundFusionTM Audio Codec '97 s Complete suite of Analog I/O connections:
-- Line In, Line Out, Mic In, Headphone or Headset connection, Modem audio connection, CD Audio In, Video In, Aux In, and PC Speaker In
CrystalClearTM AC '97 Motherboard Reference Design
DESCRIPTION
The CRD4610-1 showcases Cirrus Logic's Cystal Audio AC '97 motherboard solution using the CS4610 SoundFusion Audio Accelerator and the CS4297 SoundFusion Audio Codec '97. This design illustrates a single sided motherboard implementation on a PCI adapter card. Using the Mic In, Line Out and Line In analog connectors only, the combined motherboard footprint is approximately 3.1 sq. in. This area is outlined around the CS4610 and the CS4297. The card includes other optional analog inputs and outputs, as well. Volume control buttons are also included to demonstrate the hardware master volume control.
s Joystick/MIDI Interface s Meets or exceeds Microsoft's(R) PC'97 and PC'98 , both required and advanced, audio performance requirements.
ORDERING INFO CRD4610-1
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
NOV `97
Copyright (c) Cirrus Logic, Inc. 1997 (All Rights Reserved)
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
GENERAL INFORMATION
Today's multimedia applications demand high quality PC audio and many audio connections. To meet this demand Intel(R) defined the AC `97 (Audio Codec `97) specification that defines a two chip audio solution [1]. The idea behind the two-chip solution is to have a separate audio controller chip connected to the PCI bus to accelerate increasingly popular audio processing functions such as Aureal A3DTM, DirectSound 3DTM, wavetable synthesis, and Dolby(R) Digital (AC-3(R)) decoding. A separate audio codec is connected to the controller for analog mixing and data conversion. Audio data is transferred between the controller chip and the audio codec through a standard digital interface called an AC Link at a 48 kHz frame rate. For more information on AC `97 and the AC Link, please consult the AC `97 specification [1]. The advantage of a two chip audio solution is that the analog section of a system can be completely separated from the noisy digital environment of a personal computer. A digital link is all that is required to connect the audio codec to the PCI busbased AC'97 controller. This allows the audio section to reach the required signal to noise ratio of ~90 dB while making the layout and placement of the audio section easier to implement. The CRD4610-1 demonstrates Cirrus' two-chip solution using the CS4610 SoundFusion PCI Audio Accelerator and the CS4297 SoundFusion Audio Codec. These two integrated circuits demonstrate Cirrus' powerful DSP controller and unsurpassed CrystalClear audio quality in a single PCI add-in card reference design.
CS4610 PCI Audio Accelerator Section
The area around the CS4610 includes the required bypass capacitors, PLL power supply filter components, an EEPROM, the components for the joystick connection and a buffer circuit for the external MIDI connection. The layout of this section complies with the PCI specification version 2.1 [2] for add-in cards. Please refer to the Schematic and Layout sections of this document for more information. For more information on the CS4610, refer to the CS4610 Data Sheet [3]. The required area for this particular layout is 1.97 sq. in.
External EEPROM
The CS4610 EEPROM contains the required Subsystem Vendor ID and Subsystem ID values as well as two configuration registers which configure the software driver of the CS4610 to operate in AC `97 link mode. The CS4610 currently requires 7 data bytes in the EEPROM for configuration. The PCI Special Interest Group assigns manufacturers a Subsystem Vendor ID. To meet WHQLTM standards, the Subsystem ID must be a non-zero value. Please call Cirrus Logic PC Products Crystal Audio Division at (512) 445-7222 to have a Subsystem ID assigned to a particular project. If the CS4610 is implemented on a mother board, an external EEPROM is not required for proper operation. A host-load procedure may be used for configuration in this case. However, silicon revisions rev. C and prior must use an EEPROM if a unique Subsystem ID is required. This is due to an errata which causes the upper byte of the subsystem vendor ID to be duplicated in the subsystem ID field during host load to the SSVID register. It is recommended that an EEPROM be used during system development to allow debug and configuration changes without having to modify BIOS code. If host load will be used in production, the EEPROM circuitry can be left unpopulated.
REFERENCE DESIGN FEATURES
The reference design illustrates a typical four-layer, single sided motherboard layout. The reference design card is sectioned into three main parts: the CS4610 PCI Audio Accelerator section, the CS4297 Audio Codec `97 section, and the Optional Extended Analog I/O section.
2
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design For information regarding the programming and timing of the EEPROM, refer to the CS4610 Data Sheet [3].
Audio Inputs and Outputs
The entire set of the CS4297's analog I/O is represented on the reference design card through internal headers and external connectors: Line Out Mic In Line In CD ROM In Modem audio connection Headphone Out or Headset connection Aux In Video In PC Speaker
CS4297 Audio Codec `97 Section
This section contains the components for the Mic In, Line In, and Line Out audio connections. It also includes a 24.576 MHz crystal that acts as the master clock in an AC `97 configuration. The capacitors required for the CS4297 and their placement are discussed in the CS4297 Data Sheet. Refer to the Grounding and Layout section of the data sheet for the recommended routing the audio section [4]. The required area for this particular layout is 1.08 sq. in.
Optional Extended Analog I/O Section
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 to the analog ground plane. The optional section contains the components for a headphone amplifier and another microphone amplifier for the MIC2 input. This section also contains a population option for headphones or headset operation on the 1/8" external jack. The reference card ships with headphone operation enabled. To enable headset operation, R24 and R26 should be removed and one of the resistors placed in the space for R25. This will enable the microphone 2 input on the tip connection of the external jack and the right headphone channel on the ring connection of the external jack. The Modem Audio, CD ROM, Video In, Aux in, and Spk In headers are also part of the Extended Analog I/O section. Each header has a few resistor packs and capacitors associated with it. The header and its associated components may or may not be necessary depending on the audio inputs implemented.
Five external 1/8" jacks and six internal header connections are used for analog inputs and outputs. The modem audio connection and the line out connection have an internal header and an external 1/8" jack connection. When a plug is inserted into the external jack for the modem audio or the line out connections, the corresponding internal connector is disabled. The line out, line in and microphone in circuits are included in the area outlined around the CS4297 codec. The other analog connections are considered to be part of the optional extended analog I/O.
Line Out
The Line Out connection can either be made through the external 1/8" jack or the internal 4-pin (0.1 inch center) header. If the 1/8" jack is used the internal 4 pin connector is disabled. The Line Out output can only drive input impedances greater than 10 k. * Maximum output level: 1 Vrms
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
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CrystalClearTM AC '97 Motherboard Reference Design
Mic In
The Microphone In 1/8" jack provides an input to a microphone preamplifier circuit that provides 17 dB of gain. * Maximum input level: * * Microphone Boost enabled: 12.7 mV Microphone Boost disabled: 127 mV
Headphone Out or Headset
An external 1/8" jack is provided for a headphone or headset connection. The card comes configured for headphone operation with the selection being made by a 0 resistor population option. The headphone option is selected by populating R24 and R26 and not populating R25. The headset option is selected when R25 is populated and R24 and R26 are not populated.
Supports 3-pin phantom power and dynamic microphones Microphone power is provided on the ring connection of the 1/8" stereo jack
Headphone output option:
* * Capable of driving low impedance loads such as 32 headphones Maximum output level: 1.4 Vrms
Line In
The Line In 1/8" jack provides an input to the Line In pins of the CS4297. * Maximum input level: 2 Vrms
Headset option:
Ring connection: Right headphone output * * Maximum output level: 1.4 Vrms Maximum input level: * Microphone Boost enabled: 12.7 mV Microphone Boost disabled: 127 mV Tip connection: Microphone 2 input
CD ROM In
The CD ROM input header is a 4 pin (0.08 inch center) shrouded connector that fits most CD ROM audio adapter cables. * * Maximum input level: 2 Vrms Differential input using the CD common pin as the ground
Microphone power is provided on the tip connection. This setup supports phantom power mics only (not dynamic mics)
Modem Audio Connection
The modem audio connection can either be made through the external 1/8" jack or the internal 4-pin (0.1 inch center) header. These connectors have both an input and an output on them. External 1/8" jack: * * Ring connection: Mono input Maximum input level: 1 Vrms Tip connection: Mono output Maximum output level: 0.7 Vrms
Aux In
* * Internal 4 pin header (0.1 inch center) Maximum input level: 2 Vrms
Video In
* * Internal 4 pin header (0.1 inch center) Maximum input level: 2 Vrms
PC Speaker
* * Internal 2 pin header (0.1 inch center) Mono input for the internal PC speaker output
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CrystalClearTM AC '97 Motherboard Reference Design
Other Reference Card Features
Other reference card features that are not associated with the other sections are the external volume control buttons, the joystick/MIDI connection, and the power regulators.
provide up to 500 mA of current with adequate heat-sinking, which is enough power for the CS4297 and the three audio op-amps. The MC78L05 power regulators do not provide enough current to power the same devices, and are not recommended for use with the CS4297.
Volume Control Buttons
The volume control buttons are connected to the CS4610 and act as a master volume control. The four-pin header can be populated to provide a cable connection for volume control buttons that can be placed elsewhere in the system. There is a volume up button and a volume down button. Pressing both buttons at the same time enables the mute/unmmute function.
SCHEMATIC DESCRIPTION
Figures 1 through 8 show the schematics for the CRD4610-1 card. This section will describe particular pages of the schematic that need to be discussed.
Figure 7 : CD Audio Input
C5 and C6 are used in parallel to make a 2 F capacitor on the CD Common line because the input impedance on that line is half of what is on the CD In Right and CD In Left. A 2 F capacitor could be used, but many of the 2 F capacitors tested have shown distortion problems.
Joystick/MIDI connection
The DB-15 connector allows a joystick or an external MIDI device to be connected to the CS4610. In the AC' 97 configuration, the CS4610 handles the joystick operation. The external connection can also take MIDI data from an external source to the CS4610. A buffer circuit allows the MIDIOUT pin of the CS4610 to drive an external MIDI input.
Figure 3 : CS4297
A 10 F electrolytic capacitor should be 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. For the best audio performance, the analog voltage regulator should be located near the CS4297. R1 and R2 are termination resistors in the serial AC link between the CS4297 and the CS4610. NPO-type capacitors should be used on all loading capacitors of audio signals to ensure minimal added distortion.
Power Regulators
There are two power regulators on the board. One is a Linear Technologies LT117CST-3.3 voltage regulator that derives the +3.3 V supply for the CS4610 and the CS4297 from the +5 V on the PCI bus. This regulator is unnecessary on mother boards with a +3.3 V supply. The regulator was used in this reference design because the +3.3 V PCI bus power pins are not guaranteed to be on the PCI bus connector. The card is also designed to be used in a 5 V PCI Connector [2]. A Motorola MC78M05CDT regulates the PCI +12 V supply down to provide a clean +5 V analog supply for the operational amplifiers and the CS4297. A power regulator is recommended for the analog voltage supply to provide good audio signal quality. The MC78M05CDT regulator can
Figure 2 : CS4610
The 0.1 F capacitors connected to the power pins of the CS4610 should be as close as possible to the chip. The inductor L6 is used to filter the power supply for the internal PLL circuit. R7 can be removed from a production design, and pin 51 can be connected directly to digital ground. R3 and R4 are termination resistors in the serial AC link between the CS4297 and the CS4610.
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
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CrystalClearTM AC '97 Motherboard Reference Design
Figure 4 : Line Input
Two parallel 1 F capacitors are used on the line in circuit to decrease the low frequency corner since this input is usually used for high signal quality input. A 2 F capacitor could be used, but 2 F surface mount capacitors are often not high quality capacitors and can add distortion to audio signals.
on trace lengths that are not imposed on motherboard designs. These trace length limits for add-in cards are as follows: * * * * Maximum trace length for 32-bit signals on 32bit and 64-bit cards is 1.5 inches. Maximum trace lengths for signals on the 64bit extension are 2 inches. Trace length for the PCI CLK signal is 2.5 inches 0.1 inch. The PCI CLK signal must drive only one load.
Figure 6 : Headphone or Headset
A resistor population option is included to choose between a headphone or headset connection. The headset connection incorporates the right headphone and MIC2 on one external jack.
Figure 14 : MIDI and Joystick Connection
A buffer driver circuit is used on the MIDI output pin to provide the necessary drive for MIDI devices connected through a long cable. This circuit can be removed, and R28 populated to bypass the buffer driver circuit if it is unnecessary.
Please refer to the PCI 2.1 Specification Section 4.3.6 for information on routing PCI bus signals on a motherboard [2].
Partitioned Voltage and Ground Planes
The CRD4610-1 is partitioned into a digital and analog section. Correspondingly, the voltage and ground planes are partitioned to keep digital and analog ground currents from crossing. Ground currents from digital signals are inherently noisy with respect to analog signals and should be isolated from the audio section. The first rule in laying out mixed signal PCBs is to keep all digital signals over the digital ground plane and all analog signals over the analog ground plane. When digital and analog signals cross planes, they introduce noise into the audio section reducing performance. 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. Another small partition in the digital ground plane is for the crystal oscillator. The data converters in the CS4297 are highly susceptible to noise on the
Figure 15 : PCI Bus Connection
The PCI 2.1 specification requires that each unused +3.3 V power pin should be connected with an average of 0.01 F capacitor [2]. Two 0.1 F capacitors in parallel provide the required capacitance for the power pins.
EMC Components
A number of capacitors and inductors are included to help the board meet EMC compliance tests, such as FCC Part 15. These components are outlined in the schematic. They may or may not be needed in a particular design, so the footprints are added in case they are necessary. EMC testing should show where problem areas exist, and components can be added to those areas. EMC components can also be removed in areas that do not show problems.
GROUNDING AND LAYOUT
The routing of the CRD4610-1 provides a good example of how a PCI add-in card should look. PCIbus based add-in cards have explicit requirements
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DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design crystal pins. This partition serves to keep noise from coupling into these pins. A separate chassis ground is also used on the VCC Layer for EMC purposes. All of the components that are for EMC compliance are referenced to this plane. The chassis ground plane is connected to the analog ground plane at the external jacks.
REFERENCES
1) Intel, Audio Codec `97 Component Specification, Revision 1.03, September 15, 1996. http://developer.intel.com/pc-supp /platform/ac97/ 2) PCI Special Interest Group, PCI Local Bus Specification, Revision 2.1, June 1, 1995. http://www.pcisig.com/ 3) Cirrus Logic, CS4610 SoundFusion PCI Audio Accelerator Data Sheet http://www.cirrus.com/products /overviews/cs4610.html 4) Cirrus Logic, CS4297 SoundFusion Audio Codec `97 Data Sheet http://www.cirrus.com/products /overviews/cs4297.html 5) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 0.5 http://www.cirrus.com/products /papers/meas/meas.html 6) Microsoft, PC Design Guidelines, http://www.microsoft.com/hwdev/desguid/ 7) M. Montrose. Printed Circuit Board Design Techniques for EMC Compliance, IEEE Press, New York: 1996.
CS4297 Layout Notes
Please refer to the CS4297 Data Sheet on how the area under the chip should be partitioned and how the bypass capacitors should be placed [4]. 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.
Dolby and AC-3 are registered trademarks of Dolby Laboratories Licensing Corporation. Aureal A3D is a trademark of Aureal Semiconductor Inc. Intel is a registered trademarks of Intel Corporation. Microsoft is a registered trademark, DirectSound 3D and WHQL are trademarks of Microsoft. SoundFusion and CrystalClear are trademarks of Cirrus Logic, Inc. All other names are trademarks, registered trademarks, or service marks of their respective companies.
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
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CrystalClearTM AC '97 Motherboard Reference Design
MIC2 VREF
MIC2
MIC2_IN
HP_OUT_L HP_OUT_R
VREF
AUX_IN AUX_R AUX_L Figure 9
AUX_R AUX_L AUX_R AUX_L
MIC2
Figure 6
HEADPHONE_OUT
ALT_LINE_OUTR ALT_LINE_OUTL VREF HP_OUT_R HP_OUT_L
ALT_LINE_OUTR ALT_LINE_OUTL
ALT_LINE_OUTR ALT_LINE_OUTL VREF
HP_OUT_R HP_OUT_L
CD_IN
CD_INR CD_INL CD_COM
CD_INR CD_INL CD_COM
CD_INR CD_INL CD_COM
Figure 13
CS4297
MONO_OUT PHONE_IN MIC1 MONO_OUT PHONE_IN
Figure 7
VIDEO_IN
VIDEO_L VIDEO_R VIDEO_L VIDEO_R
PHONE_IN
MONO_OUT PHONE_IN
Figure 10
MIC1_IN
MIC1 VREF
VIDEO_L VIDEO_R ASYNC ARST# ASDOUT ABITCLK ASDIN
LINE_INL LINE_INR LINE_OUTR LINE_OUTL VREF MIC1 VREF
Figure 8 PC_BEEP
PC_BEEP
PC_BEEP
PC_BEEP
ASYNC ARST# ASDOUT ABITCLK ASDIN
Figure 11
Figure 5
LINE_INL LINE_INR
Figure 3
LINE_IN
LINE_INL LINE_INR
Figure 2
MIDIIN MIDIOUT JBB2 JBB1 JBCY JBCX JAB2 JAB1 JACY JACX MIDIIN MIDIOUT JBB2 JBB1 JBCY JBCX JAB2 JAB1 JACY JACX ASYNC ARST# ASDOUT ABITCLK ASDIN MIDIIN MIDIOUT JBB2 JBB1 JBCY JBCX JAB2 JAB1 JACY JACX
Figure 4
LINE_OUT
LINE_OUTR LINE_OUTL
MIDI_JOY
LINE_OUTR LINE_OUTL
CS4610
AD[31..0]
Figure 12
Figure 14
INTA# RST# CLK GNT# REQ# C/BE3# IDSEL C/BE2# FRAME# IRDY# TRDY# DEVSEL# STOP# PERR# SERR# PAR C/BE1# C/BE0# INTA# RST# CLK GNT# REQ# C/BE3# IDSEL C/BE2# FRAME# IRDY# TRDY# DEVSEL# STOP# PERR# SERR# PAR C/BE1# C/BE0#
INTA# RST# CLK GNT# REQ# C/BE3# IDSEL C/BE2# FRAME# IRDY# TRDY# DEVSEL# STOP# PERR# SERR# PAR C/BE1# C/BE0#
POWER
Figure 16
PCI_BUS Figure 15
Figure 1. Block Diagram of CRD4610-1
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AD[31..0]
AD[31..0]
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CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
+3.3VD
43 Volume Control RP4 4.7K 12 4 S2 DOWN 1 G U D 3 2 1 DGND C36 100pF NPO DGND +3.3VD U3 1 2 A0 VCC 3 A1 /WC 4 A2 SLC VSS SDA X24C04 DGND DGND C37 100pF NPO 4
S1 UP DO NOT POPULATE J3 J3 4 1
CS4610 AUDIO ACCELERATOR
1 2 RP5 4 3 U2 ABITCLK ASDOUT ASDIN +3.3VD R4 ASYNC ARST# JAB1 JAB2 JBB1 R5 JBB2 10K JACX JBCX JBCY JACY MIDIIN MIDIOUT R3 47 47 74 75 76 77 78 56 57 58 59 52 54 55 53 60 63 VOLUP VOLDN EECLK EEDATA R7 DGND INTA# RST# CLK GNT# REQ# FRAME# IRDY# TRDY# DEVSEL# STOP# PERR# SERR# PAR IDSEL +3.3VD 19 12 61 64 68 86 94 100 8 21 31 39 50 73 CVDD0 CVDD1 CVDD2 CVDD3 CVDD4 PCIVDD0 PCIVDD1 PCIVDD2 PCIVDD3 PCIVDD4 PCIVDD5 PCIVDD6 PCIVDD7 VDD5REF CS4610-CM C57 Y5V 0.1uF 10K 81 82 83 84 85 15 16 17 20 23 24 25 26 99 66 70 71 79 80 51 ABITCLK/SCLK ASDOUT ASDIN ASYNC/FSYNC ARST JAB1/SDO2 JAB2/SDO3 JBB1/LRCK JBB2/MCLK JACX JBCX JBCY JACY MIDIIN MIDIOUT SDIN2/GPIO VOLUP/XTALI VOLDN/XTALO EECLK/GPOUT EEDAT/GPIO2 TEST INTA RST PCICLK PCI_GNT PCI_REQ FRAME IRDY TRDY DEVSEL STOP PERR SERR PAR IDSEL AD00 AD01 AD02 AD03 AD04 AD05 AD06 AD07 AD08 AD09 AD10 AD11 AD12 AD13 AD14 AD15 AD16 AD17 AD18 AD19 AD20 AD21 AD22 AD23 AD24 AD25 AD26 AD27 AD28 AD29 AD30 AD31 48 47 46 45 44 43 42 41 37 36 35 34 33 32 29 28 11 10 9 6 5 4 3 2 97 96 95 92 91 90 89 88 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 AD16 AD17 AD18 AD19 AD20 AD21 AD22 AD23 AD24 AD25 AD26 AD27 AD28 AD29 AD30 AD31
100
4X1HDR
AD[31..0]
AD[31..0]
8 7 6 5
1 2 R6 4.7k
C38 X7R 0.01UF
+3.3VD
38 CBEO 27 CBE1 14 CBE2 98 CBE3 69 CRYVDD 72 CRYGND 18 CGND0 13 CGND1 62 CGND2 65 CGND3 67 CGND4 87 PCIGND0 93 PCIGND1 1 PCIGND2 7 PCIGND3 22 PCIGND4 30 PCIGND5 40 PCIGND6 49 PCIGND7 DGND
C/BE0# C/BE1# C/BE2# C/BE3# C39 1000pF X7R
L6 120 @ 100MHz
1
C40 0.1uF Y5V
2 DGND
+5V_PCI
DGND
CS4610-CM CVDD PINS +3.3VD +3.3VD +3.3VD
CS4610-CM PCIVDD PINS +3.3VD +3.3VD +3.3VD +3.3VD
PIN 13 C26 Y5V 0.1uF
PIN 19 C28 Y5V 0.1uF
PIN 61 C30 Y5V 0.1uF
PIN 8 C41 Y5V 0.1uF
PIN 21 C43 Y5V 0.1uF
PIN 31 C45 Y5V 0.1uF
PIN 39 C47 Y5V 0.1uF
DGND +3.3VD
DGND +3.3VD
DGND
DGND +3.3VD
DGND +3.3VD
DGND +3.3VD
DGND +3.3VD
PIN 68 C32 Y5V 0.1uF
PIN 64 C34 Y5V 0.1uF
PIN 50 C49 Y5V 0.1uF
PIN 86 C51 Y5V 0.1uF
PIN 94 C53 Y5V 0.1uF
PIN 100 C55 Y5V 0.1uF
DGND
DGND
DGND
DGND
DGND
DGND
Figure 2. CS4610 CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
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CrystalClearTM AC '97 Motherboard Reference Design
+3.3VD +5VA U? 25 AVdd1 38 AVdd2 1 DVdd1 9 DVdd2 2 XTL_IN 3 XTL_OUT Y1 1 24.576 MHz C13 22pF NPO DGND C14 22pF NPO DGND 2 ASDOUT ASYNC ARST# PC_BEEP PHONE_IN AUX_L AUX_R VIDEO_L VIDEO_R CD_INL CD_COM CD_INR MIC1 MIC2 LINE_INL LINE_INR 5 10 SDATA_OUT SYNC 11 RESET# 12 13 14 15 16 17 18 19 20 21 22 23 24 PC_BEEP PHONE AUX_L AUX_R VIDEO_L VIDEO_R CD_L CD_GND CD_R MIC1 MIC2 LINE_IN_L LINE_IN_R SDATA_IN BIT_CLK LINE_OUT_L LINE_OUT_R MONO_OUT ALT_LINE_OUT_L ALT_LINE_OUT_R NC1 NC2 NC3 NC4 NC5 NC6 NC7 NC8 NC9 NC10 NC11 AVss1 AVss2 DVss1 DVss2 26 42 4 7 AGND
DGND 8 6 R2 35 36 37 39 41 31 32 33 34 40 43 44 45 46 47 48 C17 680pF NPO AGND C18 680pF NPO
R1 47
47 ASDIN ABITCLK LINE_OUTL LINE_OUTR C15 680pF NPO C16 680pF NPO AGND MONO_OUT ALT_LINE_OUTL ALT_LINE_OUTR
VREF C22 C20 0.1uF Y5V 1.0uF Y5V C143 1.0uF Y5V C21 0.1uF Y5V C24 390pF NPO C25 390pF NPO
27 REFFLT 28 Vrefout 29 AFLT1 30 AFLT2
C19 680pF NPO
CS4297-KQ
AGND
AGND
+3.3VD Place close to pins 9 and 7 + C7 ELEC 10uF If the 10uF capacitor for the +5V analog regulator is far from the CS4297 another 10uF electrolytic capacitor should be connected between pins 25 and 26 of the CS4297.
DGND
+3.3VD
+5VA
C9 0.1uF Y5V
C10 0.1uF Y5V
C11 0.1uF Y5V
C12 0.1uF Y5V
DGND
AGND
Figure 3. CS4297
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CrystalClearTM AC '97 Motherboard Reference Design
LINE IN J4 4 3 5 2 1 PHONO-1/8 Connect CGND to AGND at the jack AGND CGND
1 2
RP18
4 3
C141
1.0uF Y5V
6.8k
C63 C64
1.0uF Y5V 1.0uF Y5V 1.0uF Y5V
LINE_INR LINE_INL
EMC C65 C66 100pF NPO 100pF NPO AGND 1 2 RP19 4 3
C142
6.8k
Figure 4. Line Input
+5VA
AGND U5A 2 -4 3 + +5VA 8 R12 R14 47
C71 0.1uF Y5V AGND
1 MC33078D
VREF
R15 47k
47k
220pF C74 NPO C73
J7 4 3 5 2 1 PHONO-1/8 Connect CGND to AGND at the jack AGND CGND EMC C78 100pF NPO C79 100pF NPO R16 2.2k C75 C76 3.3uF + ELEC 0.33uF X7R
100pF NPO AGND U5B 6 -4 5 +5VA 8 + AGND C77 0.33uF X7R MC33078D 7 MIC1
R17
6.8k
Figure 5. Microphone Input and Amplifier
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+5VA AGND U6A 2 -4 3+ +5VA 8 AGND C80 0.1uF Y5V
1 MC33078D
VREF
HP_OUT_R R18 2.2k R19 47k
R22
47k 220pF NPO
C83 R21 J8 HEADPHONE OR MIC2 AND RIGHT HEADPHONE JACK PHONO-1/8 EMC Connect CGND to AGND at the jack AGND C86 390pF NPO C87 390pF NPO R23 6.8k 47 C82 4 3 5 2 1 100pF NPO C84 0.33uF X7R AGND
U6B 4 6 5+ +5VA 8
AGND C85 0.33uF X7R MC33078D 7 MIC2
CGND
+
C88 3.3uF ELEC
R24 0
AGND
DO NOT POPULATE R25
R25 0
AGND
R26 0 HP_OUT_L L AND R HEADPHONES: POPULATE R26 AND R24 DO NOT POPULATE R25 R HEADPHONE AND MIC2: POPULATE R25 DO NOT POPULATE R26 AND R24
Figure 6. Headphone or Headset Connection and Microphone 2 Amplifier
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
12
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
EML
CD IN
J2 R GND L GND 1 2 3 4
L3 31@ 100MHz 1 2
RP16 4 3 6.8k RP17
C3
1.0uF Y5V CD_INR
L4 31@ 100MHz
AGND
1 2 6.8k
4 3
C4
1.0uF Y5V CD_INL
B4B-PH-K
L5 31@ 100MHz
RP3 1 2 3.4k AGND 4 3
C5
1.0uF Y5V 1.0uF Y5V CD_COM
C6
Figure 7. CD Audio Input
EMC J12 R GND GND L 4X1HDR AGND 4 3 2 L8 31@ 100MHz
VIDEO IN
RP20 1 2 6.8k 4 3 C134 1.0uF Y5V VIDEO_R
AGND 1 31@ 100MHz L9
RP21 1 2 6.8k 4 3 1.0uF Y5V C135 VIDEO_L
Figure 8. Video Audio Input
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
13
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
AUX IN
J1 R GND GND L 4 L1 3 2 1 4X1HDR L2
EML 31@ 100MHz 1 2 6.8k RP14 4 3 C1 1.0uF Y5V AUX_R
AGND
RP15 1 2 6.8k 4 3 C2 1.0uF Y5V AUX_L
31@ 100MHz
AGND
Figure 9. Aux Input
INTERNAL MODEM CONNECTION J13 MONO OUT GND GND PHONE IN 4X1HDR 4 3 2 1 AGND
EXTERNAL MODEM J11 4 3 5 2 1 C124 R34 C125 20K EMC C126 100pF NPO AGND C127 100pF NPO R35 47k CGND R36 47k
1.0uF Y5V PHONE_IN
MONO_OUT
1.0uF Y5V
PHONO-1/8
Connect CGND to AGND at the jack
AGND
AGND
Figure 10. MODEM Audio Connection
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
14
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
PC Speaker IN
+5VA
Tie to AGND rather than +5VA if PC_SPKR is driven by a gate or buffer rather than a transistor
J10 1 2
EMC L7 31@ 100MHz R33
R32 4.7k 47k
1 C122 2 C123
0.1uF Y5V PC_BEEP
HDR2X1
2700pF X7R
AGND
Figure 11. PC Speaker Input
C67 LINE_OUTR +
10uF ELEC J5 4 3 5 2 1 PHONO-1/8 R42 1 MEG EMC C69 390pF NPO C70 390pF NPO INTERNAL LINE OUT J6 4 AGND CGND 3 2 GND 1 L 4X1HDR R GND AGND Connect CGND to AGND at the jack
LINE_OUTL
+ C68
10uF ELEC
R41 1 MEG
AGND
Figure 12. Line Output
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
15
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
+5VA
2 3
8 +
U4A TDA1308 1
4 ALT_LINE_OUTR C59 1 2 RP6 4 3 1 2 RP7 AGND 22pF NPO 4 3 39k + C60 220uF ELEC R8 10 HP_OUT_R
1/4 WATT R9 10
27k ALT_LINE_OUTL
+ C61
220uF ELEC
HP_OUT_L
1/4 WATT
C62
22pF NPO
43 RP8 47K 12
+5VA AGND 8 + TDA1308 4 AGND U4B 7
6 VREF 5
+5VA Place close as possible to U4 C58
0.1uF Y5V
AGND
Figure 13. Headphone Amplifier CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
16
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
+5V_PCI +5V_JOY RP11 JACX JBCX JBCY JACY 1 2 3 4 2.2k JAB1 JBB1 8 7 6 5 8765 R27 47k 1234 RP12 4.7k CGND 16 1 9 2 10 3 11 4 12 5 13 6 14 7 15 8 17 C89 C90 C91 C92 1 C93 1 C94 1 C95 1 C96 1000pF X7R C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 J9 DB15
JBB2 JAB2 MIDIIN
5600pF 5600pF 5600pF 5600pF X7R X7R X7R X7R 2
1000pF 1000pF X7R X7R 2 2
1000pF X7R 2
100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF 100pF NPO NPO NPO NPO NPO NPO NPO NPO NPO NPO
EMC DGND CGND CGND CGND
MIDI_BUF
+5V_PCI MIDIOUT 1 2 RP13 4 3 39k 1 MMBT2907ALT1 R29 5.1K 2 J5 JOYSTICK SUPPLY PINS +5V_JOY +5V_JOY 1 PIN 1 C107 Y5V 0.1uF PIN 1 C108 X7R 1000pF PIN 8 C111 Y5V 0.1uF PIN 8 C112 X7R 1000pF R30 10K Q13
R28 0 DO NOT POPULATE
Q23
1
1
MMBT3904LT1 R31 20K 2
2 CGND
2 CGND DGND DGND
Figure 14. MIDI and Joystick Connection
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
17
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
+12VD +5V_PCI 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
+3.3V_PCI
+3.3V_PCI
+5V_PCI P2 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 + C139 ELEC 10uF
PCI BUS TRST +12V TMS TDI +5V1 INTA INTC +5V2 RSVD1 +5V3 RSVD2 GND1 GND2 RSVD3 RST +5V4 GNT GND3 RSVD4 AD30 +3.3V1 AD28 AD26 GND4 AD24 IDSEL +3.3V2 AD22 AD20 GND5 AD18 AD16 +3.3V3 FRAME GND6 TRDY GND7 STOP +3.3V4 SDONE SBO GND8 PAR AD15 +3.3V5 AD13 AD11 GND9 AD9 KEY1 KEY2 C/BE0 +3.3V6 AD6 AD4 GND10 AD2 AD0 +5V5 REQ64 +5V6 +5V7 Side A
INTA#
RST# GNT# AD30 AD28 AD26 AD24 IDSEL AD22 AD20 AD18 AD16 FRAME# TRDY# DEVSEL# STOP# PERR# SERR# PAR AD15 AD13 AD11 AD9 C/BE0# AD6 AD4 AD2 AD0 AD8 AD7 AD5 AD3 AD1 AD14 C/BE1# AD12 AD10 AD23 C/BE3# AD21 AD19 AD17 C/BE2# IRDY# AD31 AD29 AD27 AD25 CLK REQ#
-12V TCK GND11 TDO +5V8 +5V9 INTB INTD PRSNT1 RSVD5 PRSNT2 GND12 GND13 RSVD6 GND14 CLK GND15 REQ +5V10 AD31 AD29 GND16 AD27 AD25 +3.3V7 C/BE3 AD23 GND17 AD21 AD19 +3.3V8 AD17 C/BE2 GND18 IRDY +3.3V9 DEVSEL GND19 LOCK PERR +3.3V10 SERR +3.3V11 C/BE1 AD14 GND20 AD12 AD10 GND21 KEY3 KEY4 AD8 AD7 +3.3V12 AD5 AD3 GND22 AD1 +5V11 ACK64 +5V12 +5V13 Side B PCI_BUS_5V_B
PRSNT2#, PRSNT1# = 00 Power Requirement = 7.5W max
Place near PCI edge connector PCI Bus +5V_PCI +5V_PCI Side B near pin 1 + C113 ELEC 10uF C114 X7R 0.01UF
DGND Unused PCI Bus +3.3V supply Place near PCI edge connector +3.3V_PCI
C136 Y5V 0.1uF
C137 Y5V 0.1uF
DGND
PCI_BUS_5V_A
C138 Y5V 0.1uF
DGND AD[31..0] AD[31..0] DGND
Figure 15. PCI Bus Connection CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
18
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
POWER SUPPLIES
+12VD U9 1 C132 Y5V 0.1uF + C128 ELEC 10uF IN GND MC78M05CDT 2 OUT 3 + C129 ELEC 10uF +5VA
DGND
AGND
+5V_PCI 4 3 1 C133 0.01UF X7R + C130 ELEC 10uF IN U10 OUT 2 TAB (OUT) GND LT1117CST-3.3 1
+3.3VD
+ C131 100uF ELEC
C140 Y5V 0.1uF
2 DGND
+5V_PCI EMC L10 31@ 100MHz F1 FUSE PTC +5V_JOY
HOLE
H1
1 CGND
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.
Figure 16. Power Supplies
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
19
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 17. Top Side Silk Screen
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
20
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 18. Top Layer Route
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
21
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 19. Gnd Layer
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
22
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 20. VCC Layer
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
23
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 21. Bottom Side Route
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
24
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
Figure 22. Assembly Drawing
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
25
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
26
DS241RD1C1
Figure 23. Drill Drawing and Manufacturing Instructions
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
CRD4610-1 Revised: Thursday, June 19, 1997 RD10-1C1A Revision: C1A Bill Of Materials June 19,1997 12:06:27 Item Quantity Reference Part 1 16 C1,C2,C3,C4, C5,C6,C22,C6 3,C64,C124,C 125,C134,C13 5,C141,C142, C143 C7,C67,C68,C 113,C128,C12 9,C130,C139 C9,C10,C11,C 12,C20,C21,C 26,C28,C30,C 32,C34,C40,C 41,C43,C45,C 47,C49,C51,C 53,C55,C57,C 58,C71,C80,C 107,C111,C12 2,C132,C136, C137,C138,C1 40 C13,C14,C59, C62 C15,C16,C17, C18,C19 C24,C25,C69, C70,C86,C87 C36,C37,C65, C66,C73,C78, C79,C82,C97, C98,C99,C100 ,C101,C102,C 103,C104,C10 5,C106,C126, C127 C38,C114,C13 3 C39,C93,C94, C95,C96,C108 ,C112 C60,C61 1.0uF
MFG MURATA
PN GRM406Y5V105Z016AD
DESCRIPTION CAP,1.0UF,SO,0805,+80/20%,16V,Y5V
2
8
10uF
NICHICON
UUK1C100MCU1 GS
CAP,10uF,ELEC,20%,16V,4mm(B)
3
32
0.1uF
PANASONIC ECU-V1C104ZFV CAP,0.1uF,16V,+80/-20%,0603,Y5V
4 5 6 7
4 5 6 20
22pF 680pF 390pF 100pF
PANASONIC ECU-V1H220KCV CAP,22pF,0603,5%,50V,NPO PANASONIC ECU-V1H681JCX CAP,680pF,0805,5%,50V,NPO PANASONIC ECU-V1H391KCV CAP,390pF,0603,10%,50V,NPO PANASONIC ECU-V1H101KCV CAP,22pF,0603,5%,50V,X7R
8 9
3 7
0.01UF 1000pF
PANASONIC ECU-V1H103KBV CAP,0.01F,50V,10%,0603,X7R PANASONIC ECU-V1H102KBV CAP,1000pF,50V,10%,0603,X7R
10 11 12 13 14 15
2 2 4 2 4 1
220uF
C74,C83 220pF C75,C77,C84, 0.33uF C85 C76,C88 3.3uF C89,C90,C91, 5600pF C92 C123 2700pF
UUK0G221MCU1 GS PANASONIC ECU-V1H221KCV MURATA GRM426X7R334K016AD NICHICON UUK1H3R3MCU1 GS PANASONIC ECU-V1H562KBV
NICHICON
CAP,220uF,ELEC,20%,4V,6.3mm(D) CAP,220pF,50V,10%,0603,NPO CAP,0.33uF,1206,+80/-20%,16V,X7R CAP,3.3uF,SMT,ELEC,20%,50V,4mm( B) CAP,22pF,0603,5%,50V,X7R
PANASONIC ECU-V1H272KBV CAP,2700pF,50V,10%,0603,X7R
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
27
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
CRD4610-1 Revised: Thursday, June 19, 1997 16 1 C131 100uF 17 1 F1 FUSE 18 1 H1 HOLE 19 4 J1,J6,J12,J13 4X1HDR 20 1 J2 B4B-PH-K 21 5 J4,J5,J7,J8,J1 PHONO-1/8 1 22 1 J9 DB15 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 1 9 1 1 1 1 1 1 1 1 1 2 1 1 1 8 J10 HDR2X1 L1,L2,L3,L4,L5 31@ 100MHz ,L7,L8,L9,L10 L6 120 @ 100MHz P1 P2 Q1 Q2 RP3 RP4 RP5 RP6 RP7,RP13 RP8 RP11 RP12
PANASONIC ECE-V1AA101P RAYCHEM MINISMD050-2 HOLE SAMTEC TSW-104-07-T-S B4B-PH-K LZR SJ-372 AMP SAMTEC TDK TDK
CAP,100uF,SMT,ELEC,20%,10V FUSE
PCI_BUS_5V_A PCI_BUS_5V_B MMBT2907ALT1 NATIONAL MMBT3904LT1 NATIONAL 3.4k PANASONIC 4.7K 100 27k 39k 47K 2.2k 4.7k PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC
39 40 41 42 43
6 3 2 2 8
RP14,RP15,R 6.8k P16,RP17,RP 18,RP19,RP20 ,RP21 R1,R2,R3,R4, 47 R14,R21 R5,R7,R30 10K R6,R32 R8,R9 R12,R15,R19, R22,R27,R33, R35,R36 R16,R18 R17,R23 R24,R26 R29 4.7k 10 47k
HDR,4X1,0.025"PIN,0.1"CTR 4 PIN SHROUDED HEADER, .08" CONN,1/8" SWITCHED STEREO PHONE JACK,TH 747845-3 CONN,15D SHELL,FEMALE,RT ANGLE PC MOUNT TSW-102-07-T-S HDR,1X2,0.025"PIN,0.1"CTR HF50ACB321611- IND,FBEAD,1206,120@100MHz,25% T HF30ACB453215- IND,FBEAD,1812,120@100MHz,25% T PCI_BUS_5V_A PCI BUS 5V SIDE A PCI_BUS_5V_B PCI BUS 5V SIDE B MMBT2907ALT1 TRAN,PNP,SOT23,SMT MMBT3904LT1 TRAN,NPN,SOT23,SMT EXB-V4V342GV RES ARRAY,2 ISOLATED, 3.4k,1/16W,2%,0.6mm,SMT EXB-V4V472JV RES ARRAY,2 ISOLATED, 4.7K,1/16W,5%,0.6mm,SMT EXB-V4V101JV RES ARRAY,2 ISOLATED, 100,1/16W,5%,0.6mm,SMT EXB-V4V273JV RES ARRAY,2 ISOLATED, 27k,1/16W,5%,0.6mm,SMT EXB-V4V393JV RES ARRAY,2 ISOLATED, 39k,1/16W,5%,0.6mm,SMT EXB-V4V473JV RES ARRAY,2 ISOLATED, 47K,1/16W,5%,0.6mm,SMT EXB-V8V222JV RES ARRAY,4 ISOLATED, 2.2K,1/16W,5%,0.6mm,SMT EXB-V8V472JV RES ARRAY,4 ISOLATED, 4.7K,1/16W,5%,0.6mm,SMT EXB-V4V682JV RES ARRAY,2 ISOLATED, 6.8k,1/16W,5%,0.6mm,SMT
PHILIPS PHILIPS
9C06031A47R0J 9C06031A1002J
PANASONIC ERJ-3GSYJ472V PHILIPS 9C12063A10R0J PANASONIC ERJ-3GSYJ473V
RES,47,SO,0603,5%,1/16W,METAL FILM RES,10K,SO,0603,5%,1/10W,METAL FILM RES,4.7k,0603,1/16W,5%,MTL FILM RES,10,SO,1206,5%,1/4W,METAL FILM RES,47k,0603,1/16W,5%,MTL FILM
44 45 46 47
2 2 2 1
2.2k 6.8k 0 5.1K
PANASONIC ERJ-3GSYJ222V PANASONIC ERJ-3GSYJ682V PHILIPS 9C06032A0R00J PHILIPS 9C06031A5101J
RES,2.2k,0603,1/16W,5%,MTL FILM RES,6.8k,0603,1/16W,5%,MTL FILM RES,0,SO,0603,5%,1/10,METAL FILM RES,5.1K,SO,0603,5%,1/10W,METAL FILM
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
28
DS241RD1C1
CRD4610-1
CrystalClearTM AC '97 Motherboard Reference Design
CRD4610-1 Revised: Thursday, June 19, 1997 48 2 R31,R34 20K 49 50 51 52 53 54 55 56 2 2 1 1 1 1 2 1 R42,R41 S1,S2 U1 U2 U3 U4 U5,U6 U10 1 MEG EVQ-PHP03T CS4297-KQ CS4610-CM X24C04 TDA1308 MC33078D LT1117CST-3.3
PHILIPS PHILIPS
9C06031A2002J 9C06031A1004J EVQ-PHP03T CS4297-KQ_0 CS4610-CM AT24C04N-10SC TDA1308S8 MC33078D LT1117CST-3.3
CRYSTAL CRYSTAL ATMEL PHILIPS MOTO LINEAR TECHNOLO GY MOTOROLA EPSON
RES,20K,SO,0603,5%,1/10W,METAL FILM RES,1M,SO,0603,5%,1/16W,METAL FILM PUSH BUTTON SWITCH AC '97 Serial CODEC w/ 3D PCI AUDIO ACCELERATOR IC,24C04,512X8BIT,SO,SOIC8,EEPR OM IC,1308,SO,SOIC8,LOW NOISE HEADPHONE AMP IC,33078,SO,SOIC8,DUAL OP AMP 3.3V REGULATOR, SOT_223, 0.2%, 800mA
57 58
1 1
U9 Y1
MC78M05CDT 24.576 MHz
MC78M05CDT
+5V REGULATOR, DPAK, 2%, 500MA CA-301_24.576M- CRYSTAL, 24.576MHz, CA-301, Fund C Mode Par Res 9C06032A0R00J TSW-104-07-T-S RES,0,SO,0603,5%,1/10,METAL FILM HDR,4X1,0.025"PIN,0.1"CTR
DO NOT POPULATE 2 R25, R28 1 J3
0 4X1HDR
PHILIPS SAMTEC
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS241RD1C1
29

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