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Connect Ground (GND) at P2.pin15 from 

CX20921 evaluation board to J8.pin14 on RPi3, 

and GPIO1 at P2.pin14 from CX20921 

evaluation board to J8.pin13 on RPi3

Connect the power supplies for both CX20921 

evaluation board, (J10, +5V power supply 

included) and RPi3 (J1). Switch the power 

switch (SW3) to turn on the CX20921 evaluation 

board. LED D6 (5VLED) will turn on when there is 

power on the board.

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Go to 

https://github.com/alexa/alexa-avs-sample-app/wiki/Conexant2Mic-Raspberry-Pi

 for information on setting up AVS on  RPi3

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To verify the setup, please say 

“Alexa”

 followed by a 

question or command

1. A green LED will light up if evaluation board is 

working properly 

2. A voice response will be heard if Raspberry Pi is

set up correctly with AVS  

To learn more about Amazon Alexa Voice Service and 

access the AVS API reference guide, visit: 

https://developer.amazon.com/alexa-voice-service/

Proper speaker selection will enhance overall performance.

Please download 

“External Loudspeaker Guidelines and 

Recommendation for Smart Speaker Applications” 

for additional 

information.

Amazon, Alexa, and all related logos are trademarks of Amazon.com, Inc. or its affiliates

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