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TMS320F280049: Missing clock detection question about time for MCDSCNT to overflow

Julia Li
Expert 4755 points

Part Number: TMS320F280049

Hi Champ,

I ask this for our customer.

From the stop of OSCCLK to the overflow of MCDSCNT, the period of time can reach 819.2 us, and then the CLOCKFAIL signal is generated. Is there any method to shorten this time?

Best,

Julia

  • +1
    TI__Guru 55700 points

    Julia,

    Julia Li said:
    From the stop of OSCCLK to the overflow of MCDSCNT, the period of time can reach 819.2 us, and then the CLOCKFAIL signal is generated. Is there any method to shorten this time?

    Missing clock is detected when 13 bit counter (MCDSCNT) overflows. Since this counter is clocked using INTOSC1 (10 MHz), it takes 2^13 = 8192 INTOSC1 cycles = 819.2 us. There is no way to shorten it as we don't have a way to configure the max value of 13 bit.

    Regards,

    Manoj