ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Audio
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Audio interface[edit | edit source]
There is no directly available Audio interface on the Evaluation Kit, two SAI and one SPDIF full duplex interfaces are available on the expansion connector.
Description[edit | edit source]
The SAI and SPDIF interfaces are available on the Evaluation Kit at the connector J8.
J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.
Signals[edit | edit source]
The following table describes the interfaces signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 1, 17 | - | 3V3_CB | Power output for transceiver supply | BOARD_PGOOD driven rail |
| 2, 4 | - | 5V_VIN | Power output for transceiver supply | Always ON rail |
| 6, 9, 14, 20,
25, 30, 34, 39 |
- | DGND | Ground | |
| 7 | J15. | SAI2_TXFS | Transmit Frame Sync | |
| 8 | J15. | SAI2_RXFS | Receive Frame Sync | |
| 10 | J15. | SAI2_RXC | Receive Bit Clock | |
| 11 | J15. | SAI2_RXD0 | Receive Data 0 | |
| 12 | J15. | SAI2_TXC | Transmit Bit Clock | |
| 16 | J15. | SAI2_TXD0 | Transmit Data 0 | |
| 18 | J15. | SAI2_MCLK | Audio Master Clock | |
| 13 | J15. | SPDIF_RX | SPDIF Receiver | |
| 15 | J15. | SPDIF_TX | SPDIF Transmitter | |
| 22 | J15. | SAI5_MCLK | Audio Master Clock | |
| 32 | J15. | SAI5_RXFS | Receive Frame Sync | |
| 35 | J15. | SAI5_RXD3 | Receive Data 3 | |
| 36 | J15. | SAI5_RXD2 | Receive Data 2 | |
| 37 | J15. | SAI5_RXD1 | Receive Data 1 | |
| 38 | J15. | SAI5_RXD0 | Receive Data 0 | |
| 40 | J15. | SAI5_RXC | Receive Bit Clock |
Please note that all the signals are 0-3.3V level.
Device mapping[edit | edit source]
The device mapping depends on the used device and the device tree configuration.
Device usage[edit | edit source]
The associated device can be accessed in Linux by standard stacks, such as pulse audio or alsalib.
