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66AK2G02: Latency time

Kaustubh Kulkarni
Intellectual 1040 points
Part Number: 66AK2G02
Other Parts Discussed in Thread: AUDK2G, PCM1864

Hello all,

A student ask,

" I think AUDK2G and EVMK2G suit my needs to prototype an active noise control system. Nonetheless, I've some questions about latency in your system.

Does it work with buffers? If so, are they configurable?

Could tell me what minimal latency I could expect with your system? "

Could anyone help me this question.

Thank you in advance.

  • 0
    TI__Guru**** 161600 points
    Hi,

    K2G is pretty new device and I am not sure we have this data yet.
    Looping the design team to elaborate.

    Best Regards,
    Yordan
  • 0 in reply to Yordan Kovachev
    TI__Intellectual 1040 points
    Hello Yordan,

    Thank you for the answer.

    Any update here ?
    Could please tell me when we can get this data ?
    Thank you.
  • 0 in reply to Kaustubh Kulkarni
    TI__Guru**** 161600 points
    Hi,

    Sorry for the delay, I've notified the team internally. Feedback will be posted here.

    Best Regards,
    Yordan
  • 0
    TI__Guru** 114410 points
    Kaustubh,

    I don`t agree with my colleague Yordan`s earlier comments about not having data for this device :)

    The board has been designed to support Audio Sampling rates of upto 192 Khz. The PCM1864 can be used to sample audio signals at these sampling rates. There are DACs and bidirectional buffers on the AUDK2G, you can refer to the schematics here:
    www.ti.com/.../audk2g

    Additonally we have microphone array boards supported with the EVM that you can order:
    www.ti.com/.../TIDEP-0088

    The McASP audio peripheral drivers that we support for the AUDK2G board are optimized to use EDMA for data movement from MCASP FIFO to internal buffers and the to the OUTPUT MCASP serializers. This enables DSP to process data without requiring to worry about data movement from peripheral to memory. The MCASP also supports Async mode where it can receive and transmit at different bit rate if required. RTOS interrupt latency for C66x is around 250 cycles which is provided as part of the TI RTOS benchmarks.

    Regards,
    Rahul