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Cirrus Logic CDB47xxx User Manual

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CDB47xxx
Evaluation Kit
CDB47xxx
User 's Manual
Copyright 2012 Cirrus Logic, Inc.
DEC 2012
DS886DB9
http://www.cirrus.com

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Summary of Contents for Cirrus Logic CDB47xxx

  • Page 1 CDB47xxx Evaluation Kit CDB47xxx User ’s Manual Copyright 2012 Cirrus Logic, Inc. DEC 2012 DS886DB9 http://www.cirrus.com...
  • Page 2 IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, the Cirrus Logic logo designs, and DSP Composer are trademarks of Cirrus Logic, Inc. All other brand and product names in this doc- ument may be trademarks or service marks of their respective owners.

  • Page 3: Table Of Contents

    1.4 CDB47xxx Daughtercard System Description ........1-10...
  • Page 4 Chapter 2. Introduction to CDB47xxx Kit ............2-1 2.1 Introducing the CDB47xxx Customer Development Kit ......2-1 2.2 Identifying CDB47xxx Components .

  • Page 5: Figures

    6.4 CDB47xxx-DC48 Daughtercard Schematic ........
  • Page 6 Figure 2-2. CDB47xxxS (Single-ended) Top View ..................2-3 Figure 2-3. CDB47xxxD (Differential) Top View ...................2-5 Figure 2-4. CDB47xxx-DC48 Daughtercard ....................2-7 Figure 3-1. CDB47xxx Board with CDB47xxxD (or S)-DC-xx Daughtercard Attached ........3-2 Figure 4-1. ADC In / DAC Out Example .......................4-2 Figure 4-2. CDB47xxx System Properties ....................4-2 Figure 4-3.
  • Page 7 Figure 6-22. CDB47xxD (Differential) Microcontroller Card Interface ............6-25 Figure 6-23. CDB47xxD (Differential) Microcontroller Card Schematic ............6-26 Figure 6-24. CDB47xxD (Differential) Microcontroller Card User Interface ..........6-27 Figure 6-25. CDB47xxx-DC48 Daughtercard Block Diagram ..............6-29 Figure 6-26. CDB47xxx-DC48 Daughtercard Schematic ................6-30 Tables Table 1-1. CDB47xxx Kit Contents........................1-1 Table 4-1.

  • Page 8: Tables

    CDB47xxx Kit Contents CDB47xxx User’s Manual Chapter 1 Kit Contents and Requirements 1.1 CDB47xxx Kit Contents Each CDB47xxx kit comes with the items listed in Table 1-1. Table 1-1. CDB47xxx Kit Contents CRD Kit Item Quantity CDB47xxxS-DC48 CDB47xxxS Single-Ended Development Board with integrated MCU & USB interface CDB47xxxS-DC28 with daughtercard populated with either the CS47048, CS4028, or CS47024 DSP.

  • Page 9: Figure 1-1. Cdb47Xxxs-Dcxx Kit Contents

    CDB47xxx Kit Contents CDB47xxx User’s Manual Figure 1-1. CDB47xxxS-DCxx Kit Contents Figure 1-2. CDB47xxxD-DCxx Kit Contents DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 10: Requirements

    • Analog Audio Inputs – 1/8” stereo plug microphone cable (Connect microphone to ADC), RCA audio cables (CDB47xxxS only), 1/8” stereo plug differential cable (CDB47xxxD only) • Analog Audio Outputs – RCA audio cables (Connect CDB47xxx line-level outputs to powered speakers.) Copyright 2012 Cirrus Logic, Inc.

  • Page 11: Cdb47Xxx Main Board System Description

    CDB47xxx Main Board System Description CDB47xxx User’s Manual 1.3 CDB47xxx Main Board System Description A detailed block diagram of the CDB47xxxS Development Board is shown in Figure 1-3. The block diagram of the CDB47xxxD Development Board is shown in Figure 1-4 The sections that follow provide a detailed description of each block.

  • Page 12: Audio Inputs

    CDB47xxx Main Board System Description CDB47xxx User’s Manual Figure 1-4. CDB47xxxD Main Board Block Diagram 1.3.1 Audio Inputs 1.3.1.1 Analog Line-level Inputs -- Single-Ended (CDB47xxxS only) (AIN1A - AIN5B, AIN6B) Analog line-level inputs have the following characteristics: • Connector Type: RCA Female •...

  • Page 13: Optical Digital Input (J21)

    CDB47xxx Main Board System Description CDB47xxx User’s Manual 1.3.1.3 Optical Digital Input (J21) Optical digital inputs have the following characteristics: • Connector Type: Fiber Optic RX for Digital Audio, JIS F05 (TOSLINK) 1.3.1.4 Coaxial Digital Input (J4) Coaxial digital inputs have the following characteristics: •...

  • Page 14: Coaxial Digital Output (J35)

    • Connector Type: 1x2, 0.100 inch, Stake Header The CDB47xxx is designed to operate from a single DC power input. The 9V power supply provided with the kit is connected to the DC power input jack (J22) and is regulated down to the system voltages (5V, 3.3V, 1.8V).

  • Page 15: Digital Audio Input Source Multiplexer (U1)

    The CS470xx can be booted from external serial Flash for custom applications in which a host MCU is not desired. The CDB47xxx also allows the PC to act as a host to boot and configure the DSP through the GUI software for real-time configuration of the audio processing.

  • Page 16: C8051 Mcu

    CDB47xxx User’s Manual 1.3.9 C8051 MCU The C8051 (U15) is a USB slave controller and general purpose MCU used to control the CDB47xxx Board in stand-alone applications, and also used to interface to the PC through the USB port (DSP Composer).

  • Page 17: Cdb47Xxx Daughtercard System Description

    1-5. The CDB47xxxD ( or S)-DC28 and CDB47xxxD (or S)-DC24 daughtercards for single-ended or differential platforms are shown in Figure 1-6 Figure 1-7 respectively. The sections that follow provide a detailed description of each block. Figure 1-5. CDB47xxx-DC48 Daughtercard Block Diagram DS886DB9 Copyright 2012 Cirrus Logic, Inc 1-10...

  • Page 18: Figure 1-6. Cdb47Xxx-Dc28 Daughtercard Block Diagram

    CDB47xxx Daughtercard System Description CDB47xxx User’s Manual Figure 1-6. CDB47xxx-DC28 Daughtercard Block Diagram 1-11 Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 19: Audio Inputs

    • Connector Type: High-Density High-Speed Shrouded Female Connector • Absolute Maximum Signal Level: +3.6V • Absolute Minimum Signal Level: -0.3V This connector passes all serial audio data and clock signals up from the main CDB47xxx board. DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 20: Audio Outputs From The Cs470Xx Dsp

    CDB47xxx Daughtercard System Description CDB47xxx User’s Manual 1.4.2 Audio Outputs from the CS470xx DSP 1.4.2.1 Analog Line-level Outputs (J3) Analog line-level outputs have the following characteristics: • Connector Type: High-Density High-Speed Shrouded Female Connector • Maximum Signal Output Level: These signals should only be driven from the connectors on the main board.

  • Page 21: Audio Clocking

    The clock fed to XTI of the CS470xx is MCLK for the system, and the ASOC masters clocks to DAC and ADC. The user need only route in analog signals and route out the processed analog signals. DS886DB9 Copyright 2012 Cirrus Logic, Inc 1-14...

  • Page 22: Clock And Data Flow For S/Pdif Input

    This means that the DAO can be run at a constant Fs that is independent of the incoming S/PDIF Fs. This is useful in systems with digital amplifiers and wireless audio transmitter modules that requires a fixed Fs. The CS470xx can master its output clocks, or slave to clocks from another source. 1-15 Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 23: Clock And Data Flow For Dai Input With Fixed Output Fs

    SRC. This means that the DAO can be run at a constant Fs that is independent of the incoming DAI Fs. This is useful in systems with a digital amplifier that requires a fixed Fs. The CS470xx can masters its output clocks, or slave to clocks from another source. DS886DB9 Copyright 2012 Cirrus Logic, Inc 1-16...

  • Page 24: Clock And Data Flow For Dai Input With Matched Dao Fs

    1.6.1 Web Sites • Cirrus Logic main web site: www.cirrus.com 1.6.2 DSP Information The following information can be obtained from your Cirrus Logic representative. • CS470xx Data Sheet • CS470xx Hardware User’s Manual • AN333, CS470xx Firmware User’s Manual 1-17 Copyright 2012 Cirrus Logic, Inc.

  • Page 25: Board Information

    Other Useful Information CDB47xxx User’s Manual 1.6.3 Board Information • The following information can be obtained from your local Cirrus Logic representative. • Schematics • BOM • Artwork and PCB stackup 1.6.4 DSP Software Utility Information The following information can be obtained from your local Cirrus representative.

  • Page 26: Chapter 2. Introduction To Cdb47Xxx Kit

    Introduction to CDB47xxx Kit 2.1 Introducing the CDB47xxx Customer Development Kit The CDB47xxx kit is composed of the CDB47xxxS or CDB47xxxD main board and a daughtercard that can support any member of the CS470xx Audio SOC (ASOC) family. The CDB47xxx provides a practical platform for emulating a typical multi-channel audio system application.

  • Page 27: Identifying Cdb47Xxx Components

    • Microphone input with integrated amplifier. • Supports all members of the CS470xx family in the 100-pin LQFP package. Note: Not all features of the CS470xx are exercised on the CDB47xxx. 2.2 Identifying CDB47xxx Components 2.2.1 CDB47xxxS Board Figure 2-2 shows the top side of the CDB47xxxS Board.

  • Page 28: Figure 2-2. Cdb47Xxxs (Single-Ended) Top View

    Figure 2-2. CDB47xxxS (Single-ended) Top View...

  • Page 29: Cdb47Xxxs Board (Single-Ended) Components

    25. Power LEDs (4) 26. + 3.3V Header 2.2.2 CDB47xxxD Board Figure 2-3 shows the top side of the CDB47xxxD Board. Section 2.2.2.1 contains the legend for the reference points called out in red in Figure 2-3. DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 30: Figure 2-3. Cdb47Xxxd (Differential) Top View

    Figure 2-3. CDB47xxxD (Differential) Top View...

  • Page 31: Cdb47Xxxd Board (Differential) Components

    26. + 3.3V Header 2.2.3 CDB47xxx-DCxx Daughtercard The layout for the daughtercard shipped with the CDB47xxx is the same, regardless of which type of main board (differential or single-ended) the customer orders. The daughtercard can be ordered populated with either the CS47048, Cs47028, or CS47024 DSP. The daughtercard with CS47024 DSP is labelled and referred to as CDB47xxx-DC24.

  • Page 32: Cdb47Xxx-Dc48 Daughtercard Components

    CDB47xxx User’s Manual Figure 2-4. CDB47xxx-DC48 Daughtercard 2.2.3.1 CDB47xxx-DC48 Daughtercard Components The circled numbers found in Figure 2-4 refer to the CDB47xxx-DC48 daughtercard components in the following list. 1. Cirrus Logic CS47048 DSP 2. Power LEDs (2) 3. MCLK-XTAL_OUT Header 4.

  • Page 33: Chapter 3. Installation And Setup Of Development Board Software

    Figure 3-1. 3. Connect the power supply jack to the CDB47xxx Board at J2 and the adapter to a wall power socket or to a power strip. Note: Never connect the power supply without the daughtercard being connected to the main board.

  • Page 34: Connecting To A Pc

    5. Make Audio Input connections to the CDB47xxx Board. • Connect one end of the digital audio S/PDIF optical cable to (J1) on the CDB47xxx Board. • Connect the other end of the optical cable to the optical output on the back of a DVD player or other digital audio source.

  • Page 35: Running A Stereo Pcm Spdif In, Dac Out Application On Cdb47Xxx

    Note: If the pop up window “Project Out of Date” appears, click on “Update Devices”. 2. Press the Go button. 3. Provide analog audio input signals to inputs AIN_1A (J14) and AIN_1B (J15) of the CDB47xxx. (Full scale is approximately 4.3Vrms for a differential signal, and approximately 2.15Vrms for single ended.)

  • Page 36: Chapter 4. Programming The Cdb47Xxx Board

    The DSP Composer software is a graphical user interface (GUI) that is used to program the CS470xx DSP, and to configure the CDB47xxx. This chapter provides basic instructions for using the GUI  to control the CDB47xxx. Detailed information on using the DSP Composer firmware can be found in the ™...

  • Page 37: System Block

    Note: Leave the Autodetect Fs default value as "None" unless the application note for a specific firmware module used in a Composer project provides a setting that differs from the default value. Figure 4-2. CDB47xxx System Properties DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 38: Selecting / Changing Audio Input Sources

    Audio In block and selecting Device Properties. Figure 4-3. Selecting Audio In Source using Device Properties Dialog Note: All designs must include the Input Remap block. For details, see Section 4.2.3 “Input Channel Remap” on page 4-6. Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 39: Audio In Via Adc

    For the configuration shown in Figure 4-4, “Ain_2a” and “Ain_2b” are active. If the selection was “Ain_3A/ 3B” instead, the terminals would say “Ain_3a” and “Ain_3b.” On the CDB47xxx board, the microphone input is connected to terminal 6A. DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 40: Audio In Via S/Pdif

    S, drag the Audio In block to the canvas and choose an input combination that includes I S as shown in Figure 4-6. As stated in the dialog box, you must connect an I S Signal before pressing “GO!” Figure 4-6. Selecting Multi-Channel I S Input Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 41: Input Channel Remap

    The input configuration may be changed later by right clicking on the Audio Out block and selecting Device Properties. The Device Properties dialog box allows the user to configure one or more of the following: • DAC • I • S/PDIF Out DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 42: Audio Out Via Dac

    4-9. Note that the terminals for DAO3 are replaced by the spdif.L and spdif.R terminals. Draw wires from the Remap Audio Out put block to the Audio Out block for the desired mappings. DAO2 can also be configured to be a S/PDIF output. Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 43: I2S Audio Input Output

    S, drag the Audio In block to the canvas and choose an input combination that includes I S as shown in Figure 4-10. Draw wires from the Output Remap block to the Audio Out block for the desired mappings. DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 44: Changing Serial Control Protocol (I2C' Or Spi') / Flash Type

    SPI ) / Flash Type   The CDB47xxx is designed to communicate using either I or SPI protocols. In order to change the communication mode in the DSP Composer application, go to the menu bar and select File Properties, which brings up the Project Properties dialog.

  • Page 45: Figure 4-11. Cdb47Xxx Communication Modes / Flash Type

    Running the ADC In / DAC Out Example Application CDB47xxx User’s Manual Figure 4-11. CDB47xxx Communication Modes / Flash Type DS886DB9 Copyright 2012 Cirrus Logic, Inc 4-10...

  • Page 46: Chapter 5. Using Dsp Composer Or Micro-Condenser Application To Create And Load A Flash Image

    The DSP Composer application allows the user to create a project, compile it into a binary image, deploy the binary image to the Flash device, and to initiate a Master Boot of the CS470xx DSP. To create and load a Flash image to the DSP on the CDB47xxx Board or a customer board, follow these steps: 1.

  • Page 47: Figure 5-1. Project Properties Dialog Showing The Selection Of The I2C Protocol For

    3. Click the Advanced button and choose one the supported Flash types that will be receiving the Flash image download. When downloading a Flash image to a customer board, customers should consult their schematics to determine the Flash type to select. If downloading a Flash image to the CDB47xxx Board, choose the appropriate I C or SPI Flash device noted in the Flash Type pull-down menu.

  • Page 48: Figure 5-2. Selecting Flash Type Via The Advanced Properties Dialog Box

    Programming a Serial Flash Device for Master or Slave Boot Operations CDB47xxx User’s Manual Figure 5-2. Selecting Flash Type via the Advanced Properties Dialog Box Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 49: Using Micro-Condenser To Create And Load A Flash Image For Slave Mode Operations

    The two JP1 checkboxes allow the user to do one of the following: • JP1 Pin 12--Check this box to three-state JP1 Pin 12 signal (mute) which leaves the audio outputs unmuted on the CDB47xxx. This actions allows the user to install an external mute control such as a DSP GPO.

  • Page 50: Using Micro-Condenser To Create And Load A Flash Image Into The Dsp

    9. Open flash_image.txt to see the new Flash image data. 5.1.3.2 Programming the Flash Image into the Flash Device Cirrus provides the usb_flash.exe utility with the CDB47xxx Evaluation Kit and is used to program memory storage devices. Run program_mcu_spi_flash.bat to program flash_image.txt into the microcontroller's external SPI Flash.

  • Page 51: Chapter 6. Cdb47Xxx Schematics

    CDB47xxx Schematics 6.1 Introduction The schematics included in this document are the original Revision A schematics of the CDB47xxx and reflects the board as it was manufactured. Newer schematics may be available that incorporate feature additions or corrections, and may not match Rev. A hardware.

  • Page 52: Memory

    CDB47xxxS. Each input of the CS470xx has its own input filter that consists of a current limiter, an AC-coupling capacitor (10 F), and an anti-aliasing capacitor (2200 pF) which is not DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 53: Output Filters

    The LCD (LCD1) is the primary feedback device for the MCU user interface. The LEDs D1-D4 are also part of the MCU feedback interface showing the MCU status. LED D11 is used to indicate that the USB interface is active. Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 54: Figure 6-1. Cdb47Xxxs (Sngle-Ended) Board Block Diagram

    SPDIF - IN CDB47XXXS SPDIF - IN I2S HDRs I2S IN HDR COAX OPTICAL Header will be available to probe / bring in I2S signals 20 Pin HDR Standard 20 Pin Debug Header (Serial Control & Debug) Buffer Mic Input Digital Pre-Amp Jack...

  • Page 55: Figure 6-2. Cdb47Xxs (Sngle-Ended) Board Schematic Index

    CDB47xxS Single-Ended Schematic Descriptions CDB47xxx User’s Manual Figure 6-2. CDB47xxS (Sngle-ended) Board Schematic Index Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 56: Figure 6-3. Cdb47Xxxs (Sngle-Ended) Daughtercard Connectors

    Figure 6-3. CDB47xxxS (Sngle-ended) Daughtercard Connectors...

  • Page 57: Figure 6-4. Cdb47Xxxs (Sngle-Ended) Digital Audio Control Connectors

    Figure 6-4. CDB47xxxS (Sngle-ended) Digital Audio Control Connectors...

  • Page 58: Figure 6-5. Cdb47Xxxs (Sngle-Ended) Serial Memory

    Figure 6-5. CDB47xxxS (Sngle-ended) Serial Memory...

  • Page 59: Figure 6-6. Cdb47Xxxs (Sngle-Ended) Mic Pre-Amp

    Figure 6-6. CDB47xxxS (Sngle-ended) Mic Pre-Amp...

  • Page 60: Figure 6-7. Cdb47Xxxs (Single-Ended) Power Connectors

    Figure 6-7. CDB47xxxS (Single-ended) Power Connectors...

  • Page 61: Figure 6-8. Cdb47Xxxs (Sngle-Ended) Adc Filters

    Figure 6-8. CDB47xxxS (Sngle-ended) ADC Filters...

  • Page 62: Figure 6-9. Cdb47Xxxs (Sngle-Ended) Dac Filters

    Figure 6-9. CDB47xxxS (Sngle-ended) DAC Filters...

  • Page 63: Figure 6-10. Cdb47Xxxs (Sngle-Ended) Microcontroller Card Interface

    Figure 6-10. CDB47xxxS (Sngle-ended) Microcontroller Card Interface...

  • Page 64: Figure 6-11. Cdb47Xxxs (Sngle-Ended) Microcontroller Card User Interface

    Figure 6-11. CDB47xxxS (Sngle-ended) Microcontroller Card User Interface...

  • Page 65: Figure 6-12. Cdb47Xxxs (Sngle-Ended) Microcontroller Card User Interface

    Figure 6-12. CDB47xxxS (Sngle-ended) Microcontroller Card User Interface...

  • Page 66: Cdb47Xxd Differential Schematic Descriptions

    The series resistor is small enough that it does not affect the signal in normal operation, assuming a load of at least 5 k is connected to the analog output of the board. DS886DB9 Copyright 2012 Cirrus Logic, Inc 6-16...

  • Page 67: Mcu Block Diagram

    See section Section 6.2.10 for description of circuitry. 6.3.11 User Interface Devices Figure 6-12 shows the buttons, LEDs, and InfraRed receiver which comprise the standalone user interface for the CDB47xxxD. See section Section 6.2.11 for description of circuitry. 6-17 Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 68: Figure 6-13. Cdb47Xxd (Differential) Board Block Diagram

    CDB47XXXD_REV_A. s c h- 1 - Thu J an 29 18: 21: 59 2009 CDB47XXXD I2S HDRs SPDIF - IN SPDIF - IN I2S IN HDR Header will be available to probe / bring in I2S signals COAX OPTICAL 20 Pin HDR Standard 20 Pin Debug Header (Serial Control &...

  • Page 69: Figure 6-14. Cdb47Xxd (Differential) Board Schematic Index

    CDB47xxD Differential Schematic Descriptions CDB47xxx User’s Manual Figure 6-14. CDB47xxD (Differential) Board Schematic Index 6-19 Copyright 2012 Cirrus Logic, Inc. DS886DB9...

  • Page 70: Figure 6-15. Cdb47Xxd (Differential) Daughtercard Connectors

    Figure 6-15. CDB47xxD (Differential) Daughtercard Connectors...

  • Page 71: Figure 6-16. Cdb47Xxd (Differential) Digital Audio Control Connectors

    Figure 6-16. CDB47xxD (Differential) Digital Audio Control Connectors...

  • Page 72: Figure 6-17. Cdb47Xxd (Differential) Digital Serial Flash

    Figure 6-17. CDB47xxD (Differential) Digital Serial Flash...

  • Page 73: Figure 6-18. Cdb47Xxd (Differential) Mic Pre-Amp

    Figure 6-18. CDB47xxD (Differential) Mic Pre-Amp...

  • Page 74: Figure 6-19. Cdb47Xxxd (Differential) Power Connectors

    Figure 6-19. CDB47xxxD (Differential) Power Connectors...

  • Page 75: Figure 6-20. Cdb47Xxd (Differential) Adc Filters

    Figure 6-20. CDB47xxD (Differential) ADC Filters...

  • Page 76: Figure 6-21. Cdb47Xxd (Differential) Voltage Output Circuitry

    Figure 6-21. CDB47xxD (Differential) Voltage Output Circuitry...

  • Page 77: Figure 6-22. Cdb47Xxd (Differential) Microcontroller Card Interface

    Figure 6-22. CDB47xxD (Differential) Microcontroller Card Interface...

  • Page 78: Figure 6-23. Cdb47Xxd (Differential) Microcontroller Card Schematic

    Figure 6-23. CDB47xxD (Differential) Microcontroller Card Schematic...

  • Page 79: Figure 6-24. Cdb47Xxd (Differential) Microcontroller Card User Interface

    Figure 6-24. CDB47xxD (Differential) Microcontroller Card User Interface...

  • Page 80: Cdb47Xxx-Dc48 Daughtercard Schematic

    C master, or it can be simply terminated with pull-up resistors. The DAI3 digital audio input pin of the CS470xx is driven by a multiplexer on the CDB47xxx main board that chooses between optical S/PDIF RX, coaxial S/PDIF RX, and DAI3 from the DAI header on the main board.

  • Page 81: Figure 6-25. Cdb47Xxx-Dc48 Daughtercard Block Diagram

    Connector Serial Control CS47xxx S/PDIF In LED x 2 INPUTS S/PDIF Out SWITCH BUTTON Current Current Current Current Measure Measure Measure Measure Digital Point Point Point Point Connector +3.3VD +1.8VD +3.3VA +1.8VA POWER CONNECTOR Figure 6-25. CDB47xxx-DC48 Daughtercard Block Diagram...

  • Page 82: Figure 6-26. Cdb47Xxx-Dc48 Daughtercard Schematic

    Figure 6-26. CDB47xxx-DC48 Daughtercard Schematic...

  • Page 83: Obtaining Schematic Updates

    CDB47xxx User’s Manual 6.5 Obtaining Schematic Updates Updates to the schematics for the CDB47xxx Development Board can be can be obtained from your local Cirrus Logic representative as part of a design package including the associated BOM, and layout ™...

  • Page 84: Chapter 7. Troubleshooting

    • Possible cause: Power selection headers (P1-P3) are not populated. Solution: If you are using the DC wall supply provided with the CDB47xxx, all jumpers should installed. • Possible cause: Jumper settings when using an external power supply are set incorrectly.

  • Page 85: Audio Is Not Heard

    Problem: Audio cannot be heard. Possible cause: Wrong S/PDIF Source is selected. Solution: Check to make sure that the LED next to the desired S/PDIF source is ON. If not, use MCU to select the appropriate S/PDIF input. DS886DB9 Copyright 2012 Cirrus Logic, Inc...

  • Page 86: Revision History

    September, 2009 a caution statement immediately after the note. Changed references to the board name from CDB470xx to CDB47xxx to match the silk screen of the name on the board. Updated screenshots of DSP Composer in Chapter 4. Revised Section 5.1.2.2.

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