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Load on XOUT pin of CY254xx devices | Cypress Semiconductor

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Load on XOUT pin of CY254xx devices

Last Updated: October 01, 2011

When using a crystal connected to XIN and XOUT of a CY254xx device, can I use the XOUT pin to drive a load or drive the reference input of another clock device?


No. The extra capacitance from the load and the additional PCB trace from the XOUT pin can cause crystal oscillator start up issues. The proper solution is to configure one of the CY254xx clock outputs to be sourced from the oscillator and this output to drive an output load / second clock device reference input. 


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