Audio support for interface adapter modules depends on the serial protocol that the interface adapter module uses and the capabilities of the SerDes in use.

The carrier module does not include a dedicated audio extraction or injection pipeline. Access audio data through the general data path or via GPIO.

Audio in Serial Protocols

The serial protocols used by interface adapter modules vary in their support for embedded audio.
Table 27. Audio Support Per Serial Protocol
Protocol Audio in Standard Carrier Audio Access
DSI-2 Yes. Audio data might be embedded in video blanking intervals Full stream data (including audio) is accessible. There is no dedicated extraction hardware.
CSI-2 Yes. Audio might be carried in embedded data packet types Full stream data, including audio, is accessible. There is no dedicated extraction hardware.
OLDI No N/A
The carrier receives the full protocol stream with DSI-2 and CSI-2. To access audio data embedded in the stream, provide a TDMS file formatted according to the applicable protocol standard.

GPIO-Based Audio

Interface Adapter Module SerDes chips can provide I2S or TDM audio signals on GPIO pins. The carrier FPGA provides deterministic timing for GPIO read/write operations. You can access these signals with sufficient precision to implement audio data capture or generation. The carrier does not provide I2S or TDM framing hardware. You must implement your own protocol handling.

This GPIO-based audio access is a general hardware capability. Whether a specific interface adapter module routes audio signals to GPIO pins depends on the SerDes in use. For more information, refer to the Interface Adapter Module User Manual.

Support in FlexRIO Interface Adapter Modules

Table 28. Audio Support per Interface Adapter Module
Interface Adapter Module Model SerDes Protocol Embedded Audio in Protocol GPIO-Based Audio
IVN-14811 DS90UB981 Serializer DSI-2 Supported in video blanking intervals. Supported
IVN-14811 DS90UB988 Deserializer OLDI No Supported