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CDCM9102: CDCM9102 crystal waveform

Wei He
Prodigy 200 points
Part Number: CDCM9102
Other Parts Discussed in Thread: AM5728

The first time I use this crystal CLK circuit; I can't see the crystal waveform with an oscilloscope, it doesn't work? Any other questions?

Probe measured at the arrow,, mount C273 also not  waveform

  • 0
    Expert 1200 points
    Hi,

    Kindly use the crystal with load capacitance 10pF and shunt capacitance 7pF. In summary this device is very sensitive to crystal characteristics. We faced the same problem with18pf load capacitance crystals. Later as per the cdcm9102 data sheet and am5728 evm we changed the crystal it is working fine.

    Best Regards,
    N.V.Subbaiah.