Cirrus Logic CRD49530 User Manual

CRD49530 -USB

Customer Reference Design

CRD49530-USB

User’s Manual

Preliminary Product Information

http://www.cirrus.com

This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice.

DS705RD3

CRD49530-USB User’s Ma nual

Contacting Cirrus Logic Support

For all product questions and inquiries contact a Cirrus Logic Sales Representative.

To find the one nearest to you go to www.cirrus.com

MPORTANT NOTICE “Preliminary” product information describes products that are in production, but for which full characterization data is not yet available. Cirrus Logic, Inc. and its subsi di ar i es (“Cirrus”) believe that th e i nformation contained in this document is accurate and reliable. However, the information

is subject to change without notice an d is provi ded “AS I S” without warr anty o f any kind ( express or i mplied ). Customers ar e adv ise d to obt ain the l atest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitatio n of liability . No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyright s, trademarks, trade secrets or other intellectual property ri ghts. Cirrus owns the copyrights associated wi th the inf ormat ion contain ed here in a nd gi ves consent f or copies to be made of the i nformatio n only for use within your or ganizat ion with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.

CERTAIN APPLICATIONS USING SEMICOND UCTOR PRODUCTS MA Y INVOLVE POTENTIAL RISK S OF DEATH, PERSONAL INJURY, OR S EVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN PRODUCTS SURGICALLY IM PL ANT ED INTO THE BODY, AUTOMOTIVE SAFETY OR S ECURIT Y DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS . INCLUSION OF CIRRUS PRODU CTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOME R AGREES , BY SUC H USE, TO F ULLY INDEMNIF Y CIRRUS, IT S OFFICERS, DIRECTORS, EMPLOYEE S, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND AL L LIABILITY, INCLUDING AT TORNEYS' FEES AND COSTS, THAT MA Y RESULT FROM O R ARISE 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 document may be trademarks or service marks of their respective owners.

Microsoft and Windows XP are registered trademarks of Microsoft Corporation. SPI is a trademarks of Motorola, Inc.

C is a registered trademark of Philips Semiconductor Corp.

I HDMI is a trademark or registered trademark of HDMI Licensing, LLC in the United States and/or other countries. Dolby Digital is a registered trademark of Dolby Laboratories Licensing Corporation.

Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv

Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

1.1 CRD49530-USB Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.3 CRD49530-USB System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.4 Other Useful Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

1.5 Information Shipped with the Evaluation Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

2.1 Introducing the CRD49530-USB Customer Reference Kit . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

3.1 Installation, Setup, and Running First Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.2 Basic Application Download and System Configuration - PCM Pass-through . . . . . . . . . .4-1

4.3 Changing Audio Input Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

4.4 Changing Audio Output Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

4.5 Programming the On-board Serial Flash. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

CRD49530-USB User’s Ma nual

1.2.1 PC Requirements ...........................................................................................................1-1

1.2.2 Software Requirements..................................................................................................1-2

1.2.3 Support Hardware Requirements...................................................................................1-2

1.2.4 Cabling Requirements....................................................................................................1-2

1.3.1 Audio Inputs....................................................................................................................1-3

1.3.2 Audio Outputs.................................................................................................................1-3

1.3.3 Control Header ...............................................................................................................1-4

1.3.4 On-Board Voltage Selection Headers ............................................................................1-4

1.3.5 Audio Input Source Multiplexer.......................................................................................1-4

1.3.6 CS4953xx Audio DSP ....................................................................................................1-4

1.3.7 CS8416 S/PDIF RX................................................. ....... ...... ....... ...... ....... ...... ....... ...... ...1-5

1.3.8 CS42448 Audio Codec...................................................................................................1-5

1.3.9 Memory...........................................................................................................................1-5

1.3.10 Audio Clocking..............................................................................................................1-6

1.4.1 Web Sites .......................................................................................................................1-9

1.5.1 DSP Information .............................................................................................................1-9

1.5.2 Board Information...........................................................................................................1-9

1.5.3 Audio Codec Information................................................................................................1-9

1.5.4 S/PDIF Receiver Information..........................................................................................1-9

1.5.5 DSP Software Utility Information ..................................................................................1-10

2.1.1 Identifying Components on the CRD49530-USB ...........................................................2-2

3.1.1 Evaluation Software Installation ..................................... ...... ....... ...... .............................3-1

3.1.2 Setting up the CS49530-USB Boards ............................................................................3-2

3.1.3 Connecting to a PC ........................................................................................................3-4

3.1.4 Running a Stereo PCM Application on CRD49530-USB................................................3-6

3.1.5 Downloading Other Applications ....................................................................................3-6

4.2.1 System Block..................................................................................................................4-3

4.2.2 Channel Remap of CS4953xx........................................................................................4-3

4.3.1 S/PDIF Audio Input.........................................................................................................4-4

4.3.2 Analog Audio Input.........................................................................................................4-5

4.3.3 USB (

4.3.4 DAI Input..................... ....... ...... ....... ...... ....... ...................................... ....... ...... ................4-6

4.4.1 DAO Output of CS4953xx ..............................................................................................4-7

4.4.2 Changing Serial Control Protocol (I

S) Audio Input.....................................................................................................4-5

C“® or SPI™) / Memory Usage..............................4-8

CRD49530-USB User’s Manual

5.2 Detailed Schematic Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

5.2.1 CS49530-USB Block Diagram........................................................................................5-1

5.2.2 CS4953xx DSP...............................................................................................................5-1

5.2.3 Memory...........................................................................................................................5-2

5.2.4 S/PDIF Receiver.............................................................................................................5-2

5.2.5 Audio CODEC ................................................................................................................5-3

5.2.6 Input/Output Filters.........................................................................................................5-3

5.2.7 Microphone Preamplifier.................................................................................................5-4

5.2.8 Power and Connectors...................................................................................................5-4

5.3 Obtaining Schematic Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5

6.1 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

6.1.1 Power LEDs....................................................................................................................6-1

6.1.2 Board not Recognized by PC .........................................................................................6-1

6.1.3 Audio is not Heard..........................................................................................................6-2

6.1.4 Only Stereo Audio is Heard............................................................................................6-2

6.1.4 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2

Figures

Figure 1-1. CRD49530 Kit Contents .............................................................................................................1-1

Figure 1-2. CRD49530-USB Block Diagram ................................................................................................1-2

Figure 1-3. ADC Clocking .............................................................................................................................1-6

Figure 1-4. S/PDIF Clocking .........................................................................................................................1-7

Figure 1-5. HDMI Clocking ...........................................................................................................................1-8

Figure 2-1. CRD49530-USB System Block Diagram ...................................................................................2-1

Figure 2-2. CRD49530 Top View .................................................................................................................2-2

Figure 3-1. Front Panel Driver Setup Wizard ...............................................................................................3-2

Figure 3-2. Board Setup Diagram ................................................................................................................3-3

Figure 3-3. ound New Hardware Window ....................................................................................................3-4

Figure 3-4. Found New Hardware Wizard Window ......................................................................................3-4

Figure 3-5. Found New Hardware Wizard with Automatic Installation Option Window ................................3-5

Figure 3-6. Hardware Installation Window ...................................................................................................3-5

Figure 4-1. PCM Pass-through Example Application ...................................................................................4-2

Figure 4-2. CRD49530 System Properties ...................................................................................................4-3

Figure 4-3. CRD49530 DAO Channel Remap .............................................................................................4-3

Figure 4-4. CRD49530 Audio In Properties ..................................................................................................4-4

Figure 4-5. CRD49530 S/PDIF Rx Properties ..............................................................................................4-4

Figure 4-6. CRD49530 Analog Properties ....................................................................................................4-5

Figure 4-7. CRD49530 DAI Input Properties ................................................................................................4-6

Figure 4-8. CRD49530 Audio Out Properties ...............................................................................................4-7

Figure 4-9. CRD49530 Digital Audio Output Properties ...............................................................................4-7

CRD49530-USB User’s Ma nual

Figure 4-10. CRD49530 Comm Mode / Memory Usage ..............................................................................4-8

Figure 5-1. CRD49530-USB Block Diagram ................................................................................................5-6

Figure 5-2. CS49953xx DSP on CRD49530-USB Board .............................................................................5-7

Figure 5-3. SDRAM and Flash Block ...........................................................................................................5-8

Figure 5-4. S/PDIF Receiver ........................................................................................................................5-9

Figure 5-5. CS42448 CODEC ....................................................................................................................5-10

Figure 5-6. Input / Output Filters ................................................................................................................5-11

Figure 5-7. MIC Pre-AMP ...........................................................................................................................5-12

Figure 5-8. Connectors and Power ............................................................................................................5-13

Tables

Table 1-1. ADC Clocking...............................................................................................................................1-7

Table 1-2. S/PDIF Clocking...........................................................................................................................1-8

Table 1-3. HDMI Clocking .............................................................................................................................1-9

1.1 CRD49530-USB Kit Contents

Each CRD49530-USB kit comes with the following:

• CRD49530 Development Board

• Power Supply: +9V, 1.67A, 100V - 240V with AC Power Cord

• CRD USB Master USB Digital I/O Card

• USB Cable

• Document Card explaining how to get the latest board software

CRD49530-USB Kit Contents

CRD49530-USB User’s Manual

Chapter 1

Kit Contents and Requirements

Figure 1-1. CRD49530 Kit Contents

1.2 Requirements

1.2.1 PC Requirements

• Microsoft Windows® XP Operating System

• USB 2.0 Support

CRD49530-USB System Description

CRD49530-USB User’s Manual

1.2.2 Software Requirements

• Cirrus Evaluation Software Package (available from your local Cirrus Logic representative)

1.2.3 Support Hardware Requirements

• Digital or Analog Audio Source (e.g. DVD player, PC with a digital audio card/device)

• Amplified Speakers for audio playback (e.g. powered PC speakers, AVR/amp + speakers)

1.2.4 Cabling Requirements

• Digital Audio Inputs – S/PDIF Optical Cables, RCA Audio cables (Connect to digital audio card, audio analyzer, or DVD player.)

• Digital Audio Output – S/PDIF Optical Cables (Connect to digital audio card, audio analyzer, or AVR.)

• Analog Audio Inputs – RCA Audio Cables (Connect CRD49530 line-level inputs to analog audio source.)

• Analog Audio Outputs – RCA Audio Cables (Connect CRD49530 line-level outputs to powered speakers.)

1.3 CRD49530-USB System Description

A detailed block diagram of the CRD49530-USB Customer Reference Design is shown below in

Figure 1-2. The sections that follow provide a detailed description of each block.

Analog

MIC In

Control Header – J11

Preamp

SPI / I2C

HDMI Clocks/Data

HDMI_SPDIF

BRD_RESET

MIC

SPI / I2C

DSP_RESET

ADC Data

Audio Clock s

S/PDIF Data

CS42448

CS4953xx

XTAL_OUT

CS8416

CS42448_RESET

Memory Bus

SPI Master

SPI FLASH

SDRAM

FLASH

SPDIF OUT

SPDIF IN

Analog

Analo

Out

S/PDIF

Out

S/PDIF

Figure 1-2. CRD49530-USB Block Diagram

CRD49530-USB System Description

CRD49530-USB User’s Manual

1.3.1 Audio Inputs

1.3.1.1 Analog Line-level Inputs

• Connector Type: RCA Female

• Absolute Maximum Signa l Leve l: +6.5V

• Absolute Minimum Signal Level: GND - 0.7V

• Full Scale Amplitude: 2V

• Reference Designators: J12, J26-J30, or AIN1 - AIN6

1.3.1.2 Optical Digital Inputs

• Connector Type: Fiber Optic RX for Digital Audio, JIS F05 (JIS C5974-1993 F05)

• Reference Designators: J1-J2, or SPDIF_RX0-SPDIF_RX1

1.3.1.3 Coaxial Digital Inputs

• Connector Type: RCA Female

• Maximum Signal Level: +3.3V

• Minimum Signal Level: GND - 0.7V

• Reference Designators: J31-J32, or SPDIF_RX2-SPDIF_RX3

RMS

1.3.1.4 Microphone Input

• Absolute Maximum Signa l Level: +5V

• Absolute Minimum Signal Level: GND - 0.7V

• Full Scale Amplitude: 7mVp-p

• Reference Designator: J5

The microphone preamplifier shares the AIN5 ADC with the AIN5 RCA jack. Only one analog source can be sampled at any given time. When the microphone input is selected, the AIN5 audio jack is ignored. The default configuration enables the AIN5 audio jack.

1.3.2 Audio Outputs

1.3.2.1 Analog Line-level Outputs

• Connector Type: RCA Female

• Full Scale Amplitude: 1.21V

• Reference Designators: J33-J40, or AOUT1 - AOUT8

1.3.2.2 Optical Digital Output

• Connector Type: Fiber Optic TX for Digital Audio, JIS F05 (JIS C5974-1993 F05)

• Reference Designator: J24, or SPDIF_TX

• The S/PDIF output uses the same data line as AOUT7 and AOUT8. When the digital output has been enabled, and you have speakers connected to AOUT7 and AOUT8 white noise will be heard. This could damage the speakers.

RMS

1.3.2.3 DC Power Input

• Voltage Range: +9VDC TO +12VDC

• Minimum Power: 8W supply

• Connector Type: 2mm Female, positive center pin

• Reference Designator: J25

1.3.3 Control Header

• Connector Type: 2x25, 0.100 inch Shrouded Male

• Reference Designator: J11

This connector is the interface between the CRD49530 and the CRD USB Master. Control signals, clocks, data, and +3.3V power are passed across this connector.

1.3.4 On-Board Voltage Selection Headers

• Connector Type: 1x3, 0.100 inch, Stake Header

• Reference Designator: J17 - J19

The CRD49530-USB 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 (J25) and is regulated down to the system voltages (5V , 3.3V, 1.8V). The power selection headers should be set to the ‘REG’ position when using the DC wall supply. This is the default mode of operation and should not need to be changed for most applications.

CRD49530-USB System Description

CRD49530-USB User’s Manual

It is possible to bypass the regulated power supplies for any of the voltages by removing the jumper from the appropriate power selection header, and connecting an external voltage supply to the center pin of that selection header.

The third configuration for the power selection headers is the ‘EXT’ position. This is a special mode of operation, and cannot be used while connected to the CRD USB Master control board. Placing the power selection headers in the ‘EXT’ position while connected to the CRD USB Master will prevent the board from operating.

The unpopulated header, J3, is also designed for a special mode that brings 12V from the control header, but cannot be used when connected to the CRD USB Master.

1.3.5 Audio Input Source Multiplexer

• Source 0: CRD USB Master USB Board (This feature is used by engineering development and debugging purposes.)

• Source 1: CS8416 and CS42448

• Reference Designators: U1, U2

This multiplexer is used to select which audio sources feed the CS4953xx DAI pins. When the on-board sources (CS8416, U3 and CS42448, U4) are being used, the CRD USB Master data cannot be processed. Likewise, when the HDMI source (CRD USB Master) is selected, the on-board audio inputs are disabled.

1.3.6 CS4953xx Audio DSP

The CS4953xx audio DSP (U5) are a family of dual-core processors designed specifically for audio applications. The CRD49530 allows a designer to evaluate the CS4953xx DSPs in many different modes of multi-channel input and output. The 144-pin footprint on this board is compatible with any CS4953xx (or CS497xx) chip that uses the LQFP144 package.

CRD49530-USB System Description

CRD49530-USB User’s Manual

Audio input data to the DSP can come from any of the following sources:

• CS8416 (U3)

• CS42448 (U4)

• CRD USB Master (feature not currently supported)

• Audio output data from the DSP can be sent to the following destinations:

• CS42448 for conversion to Analog Output (AOUT1 - AOUT8)

• Optical S/PDIF Out (SPDIF_TX), this option disables AOUT7 and AOUT8

The CS4953xx has many applications stored in internal ROM, but a host is still required to configure the application for a particular system. The CRD49530 allows the PC to act as a host to boot and configure the DSP through the GUI software.

The CS4953xx can also be booted from external serial flash for custom applications that are not stored in the DSP’s ROM.

Note: The 144-pin footprint on this board is also compatible with the CS495xx family of DSPs. The

CRD49530 can support any CS495xx chip if the alternate stuffing options shown on the DSP schematic page have been followed.

1.3.7 CS8416 S/PDIF RX

The CS8416 (U3) is a 192 kHz S/PDIF receiver with an integrated input multiplexer. All of the S/PDIF input jacks (RX0-RX3) are connected to the CS8416. The active S/PDIF jack is selected by changing the internal mux through the serial host port of the CS8416. This selection is controlled through the Audio In configuration within DSP Composer (see Chapter 4 for details).

When S/PDIF audio is being processed, the CS8416 must master MCLK for the system (see "Audio

Clocking" on page 1-6 for details).

1.3.8 CS42448 Audio Codec

The CS42448 (U4) is a high-performance, multi-channel audio codec capable of supporting sample rates up to 192 kHz on its 6 ADCs and 8 DACs. This device is used for all analog-to-digital and digital-to-analog conversions on the CRD49530.

All analog inputs (AIN1-AIN6) and all analog outputs (AOUT1-AOUT8) are connected to the CS42448. The microphone input shares the AIN5 ADC with the AIN5 RCA jack. When the microphone is in use, the AIN5 RCA jack is ignored.

When analog audio is being processed, the 24.576 MHz crystal for the CS4953xx must master MCLK for the system (see "Audio Clocking" on page 1-6 for details).

1.3.9 Memory

The CRD49530 is populated with a 4 Mbit serial flash. There are 2 footprints (U11, U13) on the board for compatibility with both standard 8-pin serial flash pinouts. The serial control lines are shared by both footprints. Only one serial flash chip can be populated.

The CS4953xx can use external SDRAM (U7) to implement features such as large multi-channel audio delays. A 64 Mbit SDRAM (166 MHz) is connected to the 150 MHz memory bus of the CS4953xx.

There is an additional unpopulated footprint for a parallel flash (U6) memory device. This device was routed on the board as an example of how to route the memory bus when using a parallel flash memory,

but Cirrus recommends using serial flash for all systems. Adding a parallel flash makes the routing of the

SDRAM bus much more complicated.

1.3.10 Audio Clocking

Clocking architecture is one of the most important aspects of an audio system. The input and output clock domains of the DSP must be synchronous when delivering audio data in an isochronous fashion (constant bitrate delivery), even if the input/output domains operate at different frequencies (e.g. 48 kHz input/96

kHz output). Systems utilizing I isochronous delivery.

The requirements are slightly more complicated for systems using “bursty” delivery on the input side of the DSP, but the CRD49530 is designed to emulate isochronous systems.

The CRD49530 can operate in three different clocking modes. Each of these modes is explained in the following sections.

1.3.10.1 Clock and Data Flow for ADC Input

S delivery of S/PDIF input, ADC input, or other digital audio input use

MUXED_DAI[3:0] MUXED_LRCLK

MUXED_SCLK

CRD49530-USB System Description

CRD49530-USB User’s Manual

CS8416

S/PDIF Input

MUXED_MCLK

XTAL_OUT

SDOUT

DAI DAO

CS4953xx CS42448

MTA S/PDIF

DSP_SCLK DSP_LRCLK

DSP_DA0[3:0]

Figure 1-3. ADC Clocking

SDIN

The ADC clocking architecture is used when the ADCs are used as the only audio input (i.e. S/PDIF is disabled as described in "USB (I2S) Audio Input" on page 4-5), and the audio input source multiplexer (U1, U2) is used to select on-board audio sources. Figur e 1-3 illustrates this clocking configuration.

XTAL_OUT from the CS4953xx is MCLK for the system, and the codec masters the input clocks (MUXED_SCLK/MUXED_LRCLK) of the CS4953xx. The system routing of the clocks was simplified by using the CS8416 to drive MCLK to the system, but the internal clock multiplexer of the CS8416 is forced to the OMCK setting to pass XTAL_OUT.

CRD49530-USB System Description

CRD49530-USB User’s Manual

The CS4953x x always masters its output clocks (DSP_SCLK/DSP_LRCLK).

Table 1-1. ADC Clocking

Clock Name Clock Master Source Clock Driver Clock Frequency

MUXED_MCLK CS4953xx CS8416 24.576 MHz

MUXED_SCLK MUXED_MCLK CS42448 64*Input Fs (default)

MUXED_LRCLK MUXED_MCLK CS42448 Input Fs

DSP_SCLK MUXED_MCLK CS4953xx 64*Output Fs (default)

DSP_LRCLK MUXED_MCLK CS4953xx 1*Input Fs (default)

Note: MUXED_MCLK is the clock signal that is driven by the CS8416’s RMCK pin. The CS8416

provides the recovered clock from the S/PDIF input unless it loses signal lock, in which case the CS8416 passes the DSP clock (XTAL_OUT) that it receives on the OMCK pin.

1.3.10.2 Clock and Data Flow for S/PDIF Input

MUXED_DAI[3:0] MUXED_LRCLK

MUXED_SCLK

CS8416

S/PDIF Input

PLL

MUXED_MCLK

DSP_DAI4

DAI

XTAL_OUT

SDOUT

DAO

DSP_SCLK DSP_LRCLK

DSP_DA0[3:0]

SDIN

CS42448

CS4953xx

MTA S/PDIF

Figure 1-4. S/PDIF Clocking

The S/PDIF clocking architecture is used when any S/PDIF RX is used as an audio source, whether S/ PDIF is the only audio input or is used at the same time as ADC audio (i.e. any S/PDIF RX is selected as described in "USB (I2S) Audio Input" on page 4-5), and the audio input source multiplexer (U1, U2) is used to select on-board audio sources. Figure 1- 4 illustrates this clocking configuration.

MCLK recovered from the incoming S/PDIF stream must be MCLK for the system, and the codec masters the input clocks (MUXED_SCLK/MUXED_LRCLK) of the CS4953xx. In this configuration the internal multiplexer of the CS8416 routes the recovered MCLK to MUXED_MCLK.

The CS4953x x always masters its output clocks (DSP_SCLK/DSP_LRCLK).

Table 1-2. S/PDIF Clocking

Clock Name Clock Master Source Clock Driver Clock Frequency

MUXED_MCLK CS8416 CS8416

MUXED_SCLK MUXED_MCLK CS8416 64*Input Fs (default)

MUXED_LRCLK MUXED_MCLK CS8416 Input Fs

DSP_SCLK MUXED_MCLK CS4953xx 64*Output Fs (default)

DSP_LRCLK MUXED_MCLK CS4953xx 1*Input Fs (default)

Note: MUXED_MCLK is the clock signal that is driven by the CS8416’s RMCK pin. The CS8416

provides the recovered clock from the S/PDIF input unless it loses signal lock, in which case the CS8416 passes the DSP clock (XTAL_OUT) that it receives on the OMCK pin.

1.3.10.3 Clock and Data Flow for USB Data Delivery

This feature is used by engineering development and debugging purposes.

CRD49530-USB System Description

CRD49530-USB User’s Manual

256*S/PDIF Fs

(e.g. 12.288 MHz for 48 kHz)

MUXED_DAI[4:0]

MUXED_LRCLK

MUXED_SCLK

HDMI

SOURCE

MUXED_MCLK

DSP_SCLK

DAI DAO

CS4953xx CS42448

MTA S/PDIF

DSP_LRCLK

DSP_DA0[3:0]

Figure 1-5. HDMI Clocking

SDIN

When the audio input source multiplexer (U1, U2) is used to select HDMI clocks and data, the HDMI source masters the system MCLK, and the input clocks (MUXED_SCLK/MUXED_LRCLK) of the CS4953xx.

Other Useful Information

CRD49530-USB User’s Manual

The CS4953x x always masters its output clocks (DSP_SCLK/DSP_LRCLK).

Table 1-3. HDMI Clocking

Clock Name Clock Master Source Clock Driver Clock Frequency

MUXED_MCLK

MUXED_SCLK MUXED_MCLK HDMI Source 64*Input Fs (default)

MUXED_LRCLK MUXED_MCLK HDMI Source Input Fs

DSP_SCLK MUXED_MCLK CS4953xx 64*Output Fs (default)

DSP_LRCLK MUXED_MCLK CS4953xx 1*Input Fs (default)

Note: MUXED_MCLK is the clock signal that is driven by the HDMI source.

HDMI

Source

1.4 Other Useful Information

1.4.1 Web Sites

• Cirrus Logic main web site: www.cirrus.com

HDMI Source

256*S/PDIF Fs

(e.g. 12.288 MHz for 48 kHz)

1.5 Information Shipped with the Evaluation Kit

By installing cs4953x_eval_kit.exe, end users can access the information described in the followin subsections.

1.5.1 DSP Information

• CS4953xx Data Sheet

• CS4953xx Hardware User's Manual

• AN288, CS4953xx / CS497xxxx Firmware User’s Manual

1.5.2 Board Information

•Schematics

•BOM

• Artwork and PCB stackup

1.5.3 Audio Codec Information

• CS42448 Data Sheet

• CS42448 Errata

1.5.4 S/PDIF Receiver Information

The following informat ion is located on the www.cirrus.com web site.

• CS8416 Data Sheet

• CS8416 Errata

1.5.5 DSP Software Utili t y Information

• DSP Composer User’s Manual

The documents listed above are updated periodically and may be more up-to-date than the information in this document. Check the Cirrus Logic web site for the latest updates.

§§

Information Shipped with the Evaluation Kit

CRD49530-USB User’s Manual

1. The “§§” symbol is used throughout this manual to indicate the end of the text flow in a chapter.

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