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McBSP as master (stable sample rate)

Andrew Stepanov
Prodigy 240 points

Hello.

I want to use McBSP at DM365 as master.

It is necessary step, becasue it feeds two similiar audio codecs via I2S.

I'm confusing about sample rate source for McBSP (I2S).

I can't use the McBSP internal clock, just it is the CPU/6 clock. In my case CPU frequency is changed on demand.

Could anybody suggest clock source(master) for I2S (McBSP)?

Thanks in advance.

  • 0
    TI__Guru 65405 points

    The McBSP allows to use two sources of clocks - internal and external.
    You can get information for DM365 clocking in the following document:
           http://www.ti.com/lit/ds/sprs457e/sprs457e.pdf
    See paragraphs 3.3 Device Clocking and 6.6 Oscillators and Clocks