CS6420

DS205PP2

3

Speech Detection ..................................................................................... 24

Half-Duplex Mode ........................................................................................... 24

AGC ................................................................................................................ 25

Suppression .................................................................................................... 25

Transmit Suppression............................................................................... 26

Receive Suppression ................................................................................ 27

Circuit Design ......................................................................................................... 27

Interface Considerations ................................................................................. 27

Analog Interface........................................................................................ 27

Microcontroller Interface ........................................................................... 27

Grounding Considerations .............................................................................. 28

Layout Considerations .................................................................................... 28

System Design ....................................................................................................... 28

Gain Structure ................................................................................................. 28

Testing Issues ................................................................................................. 29

ERLE ........................................................................................................ 29

Convergence Time ................................................................................... 30

Half-Duplex Switching............................................................................... 30

Pin Descriptions .............................................................................................................. 31

Analog Interface .............................................................................................. 31

Microcontroller Interface ................................................................................. 32

Clock ............................................................................................................... 32

Power Supply .................................................................................................. 32

Miscellaneous ................................................................................................. 33

Glossary ........................................................................................................................... 34

Package Dimensions ...................................................................................................... 37