ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Audio
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| History | |||
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| Version | Issue Date | Notes | |
| 1.0.0 | Sep 2021 | First release | |
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.
[[File:{Template:Nome-som-EVB-Audio-connector.png|thumb|center|500px|Audio connector]]
Signals[edit | edit source]
The following table describes the interfaces signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 8 | J15. | SAI2_RXFS | ||
| 10 | J15. | SAI2_RXC | ||
| J15. | SAI2_TXFS | |||
| J15. | SAI2_RXD0 | |||
| J15. | SAI2_TXC | |||
| J15. | SAI2_TXD0 | |||
| J15. | SAI2_MCLK | |||
| J15. | SAI5_MCLK | |||
| J15. | SAI5_RXC | |||
| J15. | SAI5_RXD0 | |||
| J15. | SAI5_RXD1 | |||
| J15. | SAI5_RXD2 | |||
| J15. | SAI5_RXD3 | |||
| J15. | SAI5_RXFS | |||
| J15. | SPDIF_RX | |||
| J15. | SPDIF_TX | |||
| 2, 4 | - | 5V_VIN | Power output for transceiver supply | Always ON rail |
| 1, 17 | - | 3V3_CB | Power output for transceiver supply | BOARD_PGOOD driven rail |
| 6, 9, 14, 20,
25, 30, 34, 39 |
- | DGND | Ground |
Device mapping[edit | edit source]
UART3 is mapped to /dev/ttymxc2 device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.
Device usage[edit | edit source]
To connect to the debug serial port:
- connect the DB9 adapter bracket to the J22 connector on the SBCX board
- connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
- start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
