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Last activity 2017-02-17 12:50:54 +0100 by Ole Bauck flag of Norway

PDM microphone (02730A0019 or AKU242) electrical connection to nRF52832

Hi,

I am connecting the AKU242 straight to our microprocessor. It is a PDM interface so it has a SELECT, DATA, CLOCK, VDD and 5 GND signals. On the datasheet, there are two identical PDM microphones with one SELECT connected ... (more)

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Last activity 2017-02-01 16:31:59 +0100 by Ole Bauck flag of Norway

nRF52840 I2S consumption

What is the most energy efficient microphone input method, PCM via I2S or PDM. Does the SoC have a special HW handling of the PDM format for converting to PCM? Does the filtering of the 1 bit conversion compete with ... (more)

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Last activity 2017-01-26 13:06:20 +0100 by Sigurd flag of Norway

nrf52 microphone : SAADC, PDM or I2S ?

I'm starting a new design on nRF52 and I need to connect a microphone on it. Reading the datasheets and questions here, I found there's 3 solutions for the type of microphone and interface to nRF52 :

  • Analog microphone ...
(more)

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Last activity 2016-08-11 13:34:38 +0100 by newtom

i2S digital microphone with nRF52832

I am using a digital microphone using i2S interface with the following signals: BCLK (bit clock), WS (word strobe), SELECT (select for Left/Right) and SDOUT (digital data output).

On nRF52 there are five main signals for i2S including MCLK ... (more)

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Last activity 2015-02-23 13:57:35 +0100 by Asbjørn flag of Norway

Digital MEMS microphone interface with nRF51822

I'm looking to integrate a digital (PDM/I2S) MEMS microphone into my nRF51822-based design. I'd like some pointers to reference designs or other information -- the ones that seem relevant on the Nordic site (nRF6929) are locked :(

Has anyone ... (more)

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