Cirrus Logic CRD7410-HE User's Guide

CRD7410-HE User’s Guide

http://www.cirrus.com

Release 1.2

Feb ‘04

DS621UMC2

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

IMPORTANT NOTICE

Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest 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 acknowled gm ent, including those pe rtaining to warranty, patent infringem ent, and lim itation of liab ility. No responsibility is assumed by Cirrus for the use of this information, including use of this inform ation as th e basis for man ufacture o 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, copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization 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 SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY

PPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE SUPPORT PRODUCTS OR OTHER

CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT SYSTEMS OR COMPONENTS AND PERSONAL OR

UTOMOTIVE SAFETY OR SECURITY DEVICES). INCLUSION OF CIRRUS PRODUCTS 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

PPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.

Cirrus Logic, Cirrus, and the Cirrus Logic logo designs 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.

Supply of this product does not convey a license under the relevant intellectual property of Thomson multimedia and/o Fraunhofer Gesellschaft nor imply any right to use this product in any finished end user or ready-to-use final product. An inde pendent license for such us e is required. For details, please visit http://www.mp3licensing.com

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2 CRD7410-HE User’s Guide - DS621UMC2

0Table of Contents

1.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2. Main Subsystems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2.1. Decoder Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2.2. Audio Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.2.1. On-board DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.2.2. SPDIF Digital Audio Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2.2.3. Subsystem Design Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2.3. Tuner Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.2.4. User Interface Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.2.4.1. LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.2.4.2. System Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.2.4.3. Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.2.4.4. CD Loader Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1.2.4.5. Power Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.2.4.6. Debug Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1.2.4.7. Jumpers and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.1. User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.1.1. System Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.1.2. Normal (Default) Start-up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.2. Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.2.1. ESP Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.2.2. Backlight Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.2.3. Lyrics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.2.4. Resume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.2.5. Scrolling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.2.6. Power Off Time Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.2.7. Audio Source Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.2.8. Playback Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.2.9. EQ (Preset) Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.2.10. User EQ Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

2.2.10.1. 60Hz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.2.10.2. 150Hz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2.2.10.3. 400Hz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.2.10.4. 1kHz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.2.10.5. 2kHz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2.2.10.6. 6kHz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.2.10.7. 15kHz EQ Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2.2.11. 3D Enhancement Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.2.12. Sleep Timer Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.2.13. Order Tracks Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2.2.14. Firmware Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.3. Menu Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.3.1. Power Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table of Contents

2.3.2. Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

2.3.3. Navigator/Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

2.3.4. Playlist Selection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2.3.5. Playlist Creation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

2.3.6. Menu Mode, in a Menu List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.3.7. Menu Mode, in a Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2.3.8. Menu Mode, in the User EQ Setting Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.1. Tuner Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.1. Integrated Stereo FM Tuner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.2. CS5333 ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.3. CS43L42 DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.4. Tuner Mode Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

3.1.5. Tuner Mode Button Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

4 CRD7410-HE User’s Guide - DS621UMC2

List of Figures

0List of Figures

Figure 1-1.. CRD7410-HE System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 1-2.. CS7410 (U6) and SDRAM (U8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 1-3.. Flash EEPROM (U3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 1-4.. CS43L42 DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 1-5.. CS5333 ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 1-6.. Headphones and Line Out Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 1-7.. FM Tuner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 1-8.. LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 1-9.. Detail View of the Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 1-10.. Remote Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 1-11.. Servo Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 1-12.. CD Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 1-13.. Power Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 1-14.. Debug Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 2-1.. Power On Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 2-2.. Checking for Update Files Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 2-3.. Loading Updated Firmware Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 2-4.. Bad Disc Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 2-5.. Normal Operation Screen (Play). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 2-6.. Normal Operation Screen (Pause) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 2-7.. Volume Adjust Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 2-8.. Navigator Mode Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 2-9.. Playlist Select Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 2-10.. Loading Playlist Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 2-11.. Create Playlist Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 2-12.. CRD7410-HE Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 2-13.. Main Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 2-14.. Electronic Shock Protection (ESP) Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 2-15.. Backlight Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 2-16.. Lyrics Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 2-17.. Resume Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 2-18.. Scrolling Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 2-19.. Power Off Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 2-20..

Figure 2-21.. Playback Mode Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 2-22.. EQ (Preset) Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 2-23.. User EQ Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 2-24.. User EQ 60 Hz Submenu Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 2-25.. User EQ 150 Hz Submenu Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 2-26.. User EQ 400 Hz Submenu Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 2-27.. User EQ 1 kHz Submenu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 2-28.. User EQ 2 kHz Submenu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Audio Source Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

List of Figures

Figure 2-29.. User EQ 6 kHz Submenu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 2-30.. User EQ 15 kHz Submenu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 2-31.. 3D Enhancement Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 2-32.. Sleep Timer Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 2-33.. Order Tracks Screen 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 2-34.. Order Tracks Screen 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 2-35.. Firmware Version Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 3-1.. Audio Source Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 3-2.. Navigator Mode Screen (Tuner Mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 3-3.. Tuner Playback Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 3-4.. Tuner Tuning Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 3-5.. Tuner Edit Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

6 CRD7410-HE User’s Guide - DS621UMC2

List of Tables

0List of Tables

Table 1-1:. Main Board Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 1-2:. Remote Controller Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

List of Tables

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8 CRD7410-HE User’s Guide - DS621UMC2

Chapter 1

1.1 Overview

1Board Architecture

This document describes a reference design platform for the Cirrus Logic CS7410, known as the CRD7410-HE. It is an evaluation platform for a high-end portable CD player. The CRD7410-HE platform provides a low-cost yet powerful solution for today’s popular digital music formats (CDDA, MP3, WMA, VCD, AVCD, and SVCD). The platform also provides support for today’s popular music playlist formats such as MP3, M4U, PLS, B4S, and RMP. An integrated single-chip stereo FM tuner provides yet another attractive feature for the portable audio market. The system’s small size, light weight, and low power consumption allow designers to integrate powerful features into a portable device. The design is also easily adapted to small bookshelf systems.

The CRD7410-HE is composed of the main board and the remote control unit. All components necessary for a portable CD/MP3/WMA/VCD/AVCD/SVCD/FM application except the LCD display are incorporated into the main board. The remote control unit contains an LCD display and all switches necessary to control the player. Refer to Figure 1-1.

Debug capability is provided adjacent to the main circuitry. In a final design, the I2C debug and Romulator ports could easily be eliminated, leaving only the circuitry required for the application.

In addition, the LCD display and control buttons on the remote control are laid out in a manner which allows that circuitry to be moved easily to a separate front panel PCB. Refer to Figure 1-1.

Cirrus Logic provides the system as a complete solution. Schematics and Gerber data files for the PCB are available.

Board Architecture

Figure 1-1. CRD7410-HE System

The CRD7410-HE system contains three Cirrus Logic devices:

• CS7410 Compressed Audio Decoder

• CS43L42 Low-voltage Stereo D/A Converter with Headphone Amp

• CS5333 24-Bit, 96 kHz, Stereo A/D Converter

User interface control and digital audio decoding are provided by the CS7410. The CS7410 receives data from the CD loader subsystem, decodes the CDDA/MP3/WMA/VCD/AVCD/SVCD data, processes it for EQ and 3D sound effects and delivers digital audio outputs to the on-board CS43L42 digital-to-analog converter (DAC).

The CS43L42 DAC can deliver the analog audio to an external amplifier via a line-level output jack or, using its integrated headphones amplifier, power a set of headphones.

The CS5333 ADC converts analog input from the on-board world-wide-capable FM tuner or the auxiliary line-level input jack. The analog data is converted and delivered to the CS7410 for EQ and 3D sound effects processing. The processed digital data is then passed to theCS43L42 stereo DAC and output to both the integrated headphones amplifier and the auxiliary line-out jack.

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1.2 Main Subsystems

The CRD7410-HE has seven main subsystems. They are:

• Decoder

• Audio

• User Interface Subsystem

• CD Loader

• Power

• Debug Interface

• Jumpers and Switches

The subsystems are detailed in the following sections.

1.2.1 Decoder Subsystem

Board Architecture

This system uses the Cirrus Logic CS7410 for main control and audio decode. See U6 in Figure 1-2.

A Flash EEPROM is used for application code. See U3 in Figure 1-3.

An SDRAM is provided for Electronic Shock Protection (ESP). See U8 in Figure 1-2.

Figure 1-2. CS7410 (U6) and SDRAM (U8)

Board Architecture

1.2.2 Audio Subsystem

The CS7410 receives data from the CD loader subsystem, decodes the CDDA/MP3/WMA/VCD/AVCD/SVCD data (supporting M3U/M4U/PLS/B4S/RMP playlist formats), processes it for EQ and 3D sound effects and delivers digital audio outputs to the on-board CS43L42 digital-to-analog converter (DAC).

The CS43L42 DAC can deliver the analog audio to an external amplifier via a line-level output jack or, using its integrated headphones amplifier, power a set of headphones.

The CS5333 ADC converts analog input from the on-board world-wide-capable FM tuner or the auxiliary line-level input jack. The analog data is converted and delivered to the CS7410 for EQ and 3D sound effects processing. The processed digital data is then passed to the CS43L42 stereo DAC and output to both the integrated headphones amplifier and the auxiliary line-out jack.

1.2.2.1 On-board DAC

The CS43L42 is an integrated Sigma-Delta-based Digital-to-Analog Converter. This allows the designer to build a low-cost DAC with a simple RC integration circuit. In such a design, proper layout permits greater than 80 dB SNR.

Figure 1-3. Flash EEPROM (U3)

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1.2.2.2 SPDIF Digital Audio Output

This system also provides audio data in serial format, to support the use of an external DAC. An optical SPDIF connector is available adjacent to the Romulator and I2C debug ports.

1.2.2.3 Subsystem Design Details

The flowering three figures show the details of the implementation of this subsystem design. This list below defines the semiconductor devices and connectors used in this subsystem, and the function of each.

• D-to-A Converter - CS43L42

• A-to-D Converter - CS5333

• J12 - Headphones Out and Line Controller Headphones Jack

• J15 - Line Out Jack

Board Architecture

Figure 1-4. CS43L42 DAC

Figure 1-5. CS5333 ADC

Board Architecture

Remote

Connector

Figure 1-6. Headphones and Line Out Jacks

1.2.3 Tuner Subsystem

The tuner subsystem incorporates an single-chip electronically-tuned FM stereo radio with fully integrated IF selectivity and demodulation.

The radio can be tuned to the European, US, and Japanese FM bands.

The tuner’s analog outputs are sampled and converted to digital data by the CS5333 and delivered to the CS7410 for EQ and 3D sound effects processing. The data is then passed to the optical SPDIF connector and the CS43L42 DAC. The CS43L42 integrates both a headphones amplifier and line-level amplifier.

Figure 1-7. FM Tuner

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1.2.4 User Interface Subsystem

The User Interface Subsystem has three sections: the LCD (Liquid Crystal Display), the Button Matrix, and the wired remote controller. The LCD is integrated into the remote controller.

1.2.4.1 LCD Display

Figure 1-8 shows a close-up view of the LCD, which is part of the User Interface Subsystem.

The LCD display (reference designator - DSP1) is a 128 x 64 pixel display. For a dot matrix character size of 8 x 6, this gives 21 characters per line, by 8 lines per display.

Board Architecture

Figure 1-8. LCD

Board Architecture

1.2.4.2 System Control Buttons

Figure 1-9 shows a close-up view of the control buttons located on the main board, which are part of the User Interface Subsystem. The Lid Open switch works as an interlock preventing the unit from being powered on while the lid/door is open. If the lid/door is opened while the unit is playing, the power will be switched off.

User inputs are implemented with 8 push buttons on the main board and 12 buttons on the remote control.

Table 1-1 shows the functions of the push buttons shown in Figure 1-9.

Figure 1-9. Detail View of the Control Buttons

Note: When the power is on, push button S2 must be pressed to activate the system.

Table 1-1: Main Board Buttons

S1:

Next/Right/Select

S5:

Vol-

S13:

Lid Open

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S2:

Play/Pause/Up

S6:

Vol+

S3:

Stop/Down

S7:

Hold

S4:

Previous/Left/Delete

S14:

Power On

1.2.4.3 Remote Controller

Figure 1-10 shows a close-up view of the remote controller, which is part of the User Interface Subsystem.

User inputs are implemented with 8 push buttons, one switch (Hold) and one headphone output.

The Hold button prevents inadvertent button presses while it is engaged. This allows the unit for instance, to be worn while jogging or other activity without unwanted button activity.

Table 1-2 shows the functions of the push buttons and switch shown in Figure 1-10.

S1 S2 S3 S4 S5 S6

Board Architecture

Table 1-2: Remote Controller Buttons

Note: When the power is on, push button S5 must be pressed to activate the system.

S1:

Next/Right

S5:

Play/Pause/Up

S9:

Hold Switch

Figure 1-10. Remote Control Buttons

S2:

Vol-

S6:

Vol+

Stop/Down

Previous/Left/Delete

Headphones

Jack

S3:

Select/AB Repeat/Program

S7:

Navigator/Menu

S4:

S8:

Board Architecture

1.2.4.4 CD Loader Subsystem

The CRD7410-HE provides direct support for common servo chipsets. The devices incorporated into the CRD7410-HE servo system are:

• SAA7824HL - (U301) CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control. Refer to Figure 1-11.

• MM1538XQ - (U201) 4-channel Motor Driver and DC-DC control. Refer to Figure 1-12.

• TPP381 - CD Loader Mechanism. Refer to Figure 1-12.

This design implements a power-save-mode circuit to maximize battery life.

Because of the capabilities built into the CS7410, no separate microcontroller is needed.

Figure 1-11. Servo Subsystem

Figure 1-12. CD Loader

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