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duli_3411451
Level 1
Level 1
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Hello,how to connect a digital microphone to CYW20706 chip?

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MiDa_1966691
Level 4
Level 4
10 replies posted 10 sign-ins 5 solutions authored

Q) How to connect a digital microphone to CYW20706 chip?

A) The CYW20706 has a I2S /PCM  interface block.

See link with block diagram - CYW20706 Product Guide

You can connect a microphone to either of these interfaces.

Schematic for eval board -

CYW920706WCDEVAL Evaluation Board Schematic (PDF)

Pins on chip:

---------------------------------------

I2S_DO/PCM_OUT/P29/P3/P35 -- A8

I2S_CLK/PCM_CLK/P2/P37/P28 -- B7

I2S_WS/PCM_SYNC/P0/P34 -- C8


Review schematic of "CYW920706WCDEVAL Evaluation Board"   all connections are on J22 -

You can see more information in - CYW920706WCDEVAL Hardware User Guide.

https://www.cypress.com/file/378381/download

(Section - 9.1)  I2S and PCM

Another good refernce on MEMS Microphones can be found on the Infineon website.

AN558

MEMS microphone electrical implementation

https://www.infineon.com/dgdl/Infineon-AN558_MEMS_Electrical_Implementation-AN-v01_00-EN.pdf?fileId=...


-Mike

View solution in original post

3 Replies
MiDa_1966691
Level 4
Level 4
10 replies posted 10 sign-ins 5 solutions authored

Q) How to connect a digital microphone to CYW20706 chip?

A) The CYW20706 has a I2S /PCM  interface block.

See link with block diagram - CYW20706 Product Guide

You can connect a microphone to either of these interfaces.

Schematic for eval board -

CYW920706WCDEVAL Evaluation Board Schematic (PDF)

Pins on chip:

---------------------------------------

I2S_DO/PCM_OUT/P29/P3/P35 -- A8

I2S_CLK/PCM_CLK/P2/P37/P28 -- B7

I2S_WS/PCM_SYNC/P0/P34 -- C8


Review schematic of "CYW920706WCDEVAL Evaluation Board"   all connections are on J22 -

You can see more information in - CYW920706WCDEVAL Hardware User Guide.

https://www.cypress.com/file/378381/download

(Section - 9.1)  I2S and PCM

Another good refernce on MEMS Microphones can be found on the Infineon website.

AN558

MEMS microphone electrical implementation

https://www.infineon.com/dgdl/Infineon-AN558_MEMS_Electrical_Implementation-AN-v01_00-EN.pdf?fileId=...


-Mike

Hi,actually we want to support earphone and microphone simultaneously in our project.But I saw there's only one I2s interface in cyw20706, shall I need to change to other chips?

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The C7 pin is for I2S_DI or PCM_IN. I think one I2S is enough for your applicaiton.

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