Connect MIC and speaker to nrf52832

[corinna]

Hi nordic team，

I use the nrf52832 EVK ,I want to connect MIC and speaker to the EVK.

I read the nRF52832_PS_v1.4.pdf, and i guess following interfaces can be used.I don't know which is the best solution for nrf52832.

MIC-->PDM interface, I2S interface-->OP-->speaker

Or MIC-->SPI interface, I2S interface-->OP-->speaker

Or MIC-->I2S interface, I2S interface-->OP-->speaker.

And I find there is no PDM example in nrf52 SDK.

Do you have a mature solution about how to connect MIC and speaker to EVK?

Could you gave me some batter suggestions?

Thank you very much.

[Jørgen Holmefjord]

Hi,

PDM microphones are used in our Nordic Thingy:52 and Smart Remote for nRF52 reference designs. The Thingy:52 also has a speaker, but this is driven by PWM interface and an amplifier, with the audio quality this gives. Using the I2S interface should work well, and should be easy to implement with the I2S example in the SDK.

Best regards,
Jørgen