X1 and X2 clock multiplier outputs of CY7B994V with no reference

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    Question: What frequencies can be expected at the X1 and X2 clock multiplier outputs in CY7B994V Clock part in the absence of any reference clock?


    In the absence of a reference clock, the PLL is expected to lock to the zero frequency input. It will therefore run at a frequency below the specified range for the device, but still in the MHz range. For example, if FS = Low, fNOM will probably be somewhere in the range of 1 MHz to 20 MHz. It may have much higher jitter than when it is operating normally.