CMX649 查看數據表（PDF） - CML Microsystems Plc

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CMX649

ADM Codec

CML Microsystems Plc 

ADM Codec

CMX649

Section

CONTENTS

Page

1.

Brief Description.................................................................................. 1

2.

Block Diagram ..................................................................................... 3

3.

Signal List ............................................................................................4

4.

External Components.......................................................................... 5

5.

General Description............................................................................. 6

5.1 Block Descriptions.................................................................. 6

5.1.1 ADM Coding Engine ................................................... 6

5.1.2 PCM Encoding and Decoding.................................... 7

5.1.3 Transcoding with the Encoder and Decoder ............ 8

5.1.4 Non-Linear Instantaneous Companding ................... 9

5.1.5 Digitally Controlled Amplifiers................................... 9

5.1.6 Microphone Amplifier................................................. 9

5.1.7 Programmable Anti-alias/image SC Filters ............... 9

5.1.8 Data Clock Recovery ................................................ 11

5.1.9 Data Scrambler/De-scrambler .................................. 11

5.1.10 Voice Activity Detector (VAD) .................................. 12

5.2 C-BUS Description ................................................................ 13

5.2.1 Write Only Register Description .............................. 16

5.2.2 Read Only Register Description .............................. 35

6.

Application Notes .............................................................................. 37

6.1 C-BUS Operation................................................................... 37

6.2 CODEC Data Interface........................................................... 38

6.3 Example CODEC Setups and Application Help................... 39

7.

Performance Specification................................................................ 44

7.1 Electrical Performance.......................................................... 44

7.2 Packaging.............................................................................. 49

© 2003 CML Microsystems Plc

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