AXEL Lite SOM/AXEL Lite Evaluation Kit/Interfaces and Connectors/Audio
History | |||
---|---|---|---|
ID# | Issue Date | Notes | |
19/07/2021 | First DESK release |
Audio[edit | edit source]
Description[edit | edit source]
The Audio interface available on the Evaluation Kit at the connector J27.
J27 is a 7x2x2.54mm header. The audio codec is a TLV320AIC3100 device connected to the I²S interface.
Signals[edit | edit source]
The following table describes the interface signals:
Pin# | Pin name | Pin function | Pin Notes |
---|---|---|---|
4, 5, 8, 9 | AGNDM Analog | Ground | |
1 | AUX_RES | Analog ground | |
2 | AUXR | Microphone in right | |
3 | AUXL | Microphone in left | |
6 | SPKM | Speaker out (negative) | |
7 | SPKP | Speaker out (positive) | |
10 | HSOR | Audio Headset right | |
11 | HSOL | Audio Headset left | |
12 | MIC_BIAS | Microphone bias | |
13 | AUD_HP_VGND | Analog ground |
Device mapping[edit | edit source]
The Audio interface is mapped to card0
ALSA device in Linux. The ALSA peripheral #0: sbcx-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.