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BF524C xtal selection

Question asked by Jay on Apr 7, 2010
Latest reply on Apr 7, 2010 by BobK

With a BF524C, is it advisable to use the same 24MHz crystal for both USB_XTAL and CODEC_MCLK?

 

-Is the USB oscillator certain to be active at all times?

-Would any buffering be necessary or is it possible to simply connect USB_XTALIN to MCLK?

-According to the datasheet, "When using an external clock source to drive the CODEC_MCLK pin, care should be taken to select a clock source with less than 50 ps of jitter." How good is the USB oscillator in this respect?

-Are there any related issues with PCB routing?

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