Wrong PDMIC example of scheme

Discussion around products based on ARM Cortex-A5 core.

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Location: Acme Systems srl - Rome - Italy
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Joined: Fri Jul 06, 2007 11:00 am

Wrong PDMIC example of scheme

Sat Sep 05, 2020 1:10 am

Hi to all,

the schematic on this page is wrong https://www.linux4sam.org/bin/view/Linu ... udioRecord.

The PDMIC interface is mono as explained on page 2194 od the SAMA5D2:

The Pulse Density Modulation Interface Controller (PDMIC) is a PDM interface controller and decoder that support
mono PDM format

so it's unuseful to wire two PDMIC microphones and the state on L/R line is non important. It records always on the same channel.

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