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12 audio channels simultaneously in air

Tihomir Stoyanov
Prodigy 65 points
Other Parts Discussed in Thread: CC8531, CC2590

Good day, 

In my project, I need two devices: MASTER and SLAVE. MASTER should be capable of: 1) transmit to SLAVE 10 channels of uncompressed audio with highest fidelity and lowest latency possible; 2) receive from SLAVE 2 channels of uncompressed audio; 3) establish bidirectional UART port between the two devices. I am planning to use multiple CC8531/CC2590 configurations on a single PCB, as the space is crucially low.

Can you please advice, if these CC8531/CC2590 configurations could coexist in a closed to each other and if it would be too much interference between them for normal operation. 

Thanks in advance.

  • 0
    TI__Expert 3240 points
    Hi,

    There is a mechanism called "Timeslot alignment" that can be used to synchronize multiple master devices so that they are in TX and RX mode at the same time. This feature was added to handle designs as the one you are aiming for (requires a GIO to connect between the different master devices). If you also set up different channel maps for the master devices then they would affect each other as little as possible. However, how well they co-exist differ from use case to use case.

    I'm not sure if i fully understand your design, so just some other comments:
    * Each CC8531 can transmit 4 mono channels, so for 12 channels you would need to use 3 devices.
    * The CC8531 does not support UART, but I'm not sure if this is what you meant by bullet 3 above.


    Regards,
    Johan
  • 0 in reply to Johan Gustafsson
    Prodigy 65 points

    I understand fully CC8531 has no ability to send UART data, this would be implemented other way. Where can I find more info about this Time Slot Alignment? But anyways, I am afraid, that in the overcrowded 2.4GHz domain, using three channels(even synchronized) would be triple less space for all the communication and tripple more problems. Can anyone suggest a simle, general design using 5GHz domain?