CS6420
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
DS205PP2
3
CIRRUS [ CIRRUS LOGIC ]
