Instruction Manual

CRD4299-1 AMR
2 DS319RD1A1
TABLE OF CONTENTS
1. GENERAL INFORMATION ............................................................................ 4
2. REFERENCE DESIGN FEATURES ............................................................... 4
2.1 Digital Audio Out .................................................................................. 4
2.2 CS4299 Audio Codec ‘97 .................................................................... 4
2.2.1 Power Requirements .................................................................. 5
2.3 Analog I/O ............................................................................................ 5
2.4 Audio I/O .............................................................................................. 5
2.4.1 Line Out ...................................................................................... 5
2.4.2 Headphone Out .......................................................................... 5
2.4.3 Line In ........................................................................................ 5
2.4.4 Mic In .......................................................................................... 5
2.4.5 CD Audio In ................................................................................ 6
2.4.6 Aux In ......................................................................................... 6
2.4.7 Video In ...................................................................................... 6
2.4.8 Modem Audio Connection .......................................................... 6
3. SCHEMATIC DESCRIPTION ......................................................................... 7
3.1 Figure 11: Block Diagram .................................................................... 7
3.2 Figure 12: AMR Bus Interface ............................................................. 7
3.3 Figure 13: Power Supply ..................................................................... 7
3.4 Figure 14: CS4299 AC ‘97 Audio Codec ............................................. 7
3.5 Figure 15: Analog Inputs ...................................................................... 7
3.6 Figure 16: Audio Outputs ..................................................................... 8
3.7 Figure 17: Microphone Pre-amp and Bias ........................................... 8
3.8 Component Selection .......................................................................... 8
3.9 EMC Components ............................................................................... 8
4. GROUNDING AND LAYOUT ......................................................................... 9
4.1 Partitioned Voltage and Ground Planes .............................................. 9
4.2 CS4299 Layout Notes .......................................................................... 9
5. AUDIO PERFORMANCE EVALUATION ..................................................... 10
5.1 Plots ................................................................................................... 10
6. REFERENCES .............................................................................................. 17
7. ADDENDUM ................................................................................................. 17
8. BILL OF MATERIALS .................................................................................. 25
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