UNICA SBC/Interfaces and Connectors/Audio
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Audio[edit | edit source]
Description[edit | edit source]
The Audio interface is available on UNICA SBC through the J15 and J26 connectors. The audio codec is a TLV320AIC3100 device connected to the I²S interface.
- J25 is a 3.5mm female jack connector for headphone usage
- J26 is a 4x2x2.54mm header with microphone input and class-D line 1.6W power output
Signals[edit | edit source]
The following table describes the interface signals for J26:
| Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|
| 2, 4, 6 | AGND Analog | Analog Ground | |
| 1 | SP_P | Speaker+ | |
| 3 | SP_M | Speaker. | |
| 5 | MICDET | Microphone detection | |
| 7 | MIC1LP | Microphone and line input P | |
| 8 | MIC1LM | Microphone and line input M |
Device mapping[edit | edit source]
The Audio interface is mapped to card0 ALSA device in Linux. The ALSA peripheral 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 device access.
