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TMS320F2800154-Q1: XTAL Frequency

Huihuang Chen
Expert 4050 points
Part Number: TMS320F2800154-Q1


Hi Champ,

From datasheet the XTAL frequency range is 10-20MHz，if customer use 8MHz，  any problem or risk?

  • 0
    TI__Mastermind 38180 points

    Hi Johnson,

    The crystal oscillator was designed for crystals operating from 10MHz to 20MHz.  The design also assumes that the crystals of choice meet the specifications in table 6-8 [Crystal Equivalent Series Resistance (ESR) Requirements] for ESR and load capacitance.  Short answer is yes, there is a risk if customer will use 8MHz as this is outside of the crystal oscillator input frequency of operation.  Risk is that oscillation may fail to start.

    Regards,

    Joseph