AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/Audio

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Version Issue Date Notes
1.0.0 Jul 2021 First DESK release

Audio interface[edit | edit source]

Description[edit | edit source]

The optional audio interface is available on the AXEL ULite Evaluation Kit at the connector J14.

J14 is a Molex 53375-0610 header connector. The audio codec is a TLV320AIC3100 device connected to the I²S interface.

Audio connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# Codec Pin# Pin name Pin function Pin Notes
J14.1 27 HSOL Left channel Headphone/line output -
J14.2 30 HSOR Right channel Headphone/line output -
J14.3 22 SPKP Speaker + output -
J14.4 23 SPKM Speaker - output -
J14.5 11 MIC IN Microphone input -
J14.6 12 MIC BIAS Microphone bias -

Device mapping[edit | edit source]

The Audio interface is mapped to card0 ALSA device in Linux. The ALSA peripheral #0: sfczg-audio-tlv320aic3100 can be accessed via alsa-utils with hardware address 0.

Device usage[edit | edit source]

For example, it is possible to play a file using aplay -D hw:0,0 device access.