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LMH1219: Selective SMPTE Data Rate Lock

K.Yaita
Guru 29720 points
Part Number: LMH1219

Hi Team,

Programming guide page 8 "3.4 Selective SMPTE Data Rate Lock" shows it enables faster lock time.
Could you tell me how to confirm the function? Is it only way to check the time when LOCK_N pin goes low?
I would also like to know how much faster to use the function just for reference.

Best Regards,
Yaita

  • 0
    TI__Guru* 93670 points

    Hi Yaita-San,

    Yes the only way is to check LOCK_N pin. Also, you need an indication as to when data is applied to the CDR so you can measure from when data is applied to when LOCK_N becomes asserted.

    Each data rate is about 2 to 3ms faster.

    Regards,, Nasser