SBC Axel SBC/Interfaces and Connectors/Audio
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| Issue Date | Notes | ||
| 2021/07/19 | New documentation layout | ||
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.
