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