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How should I tie unused RTC crystal pins on i.MX28?

Question asked by markwilliams on Mar 7, 2014
Latest reply on Mar 27, 2014 by Yuri Muhin



We are using an external RTC on our i.MX283 design to periodically synchronise the WinCE clock. The backup current and operating voltage range of the battery backup input is limited for use with a super cap.


I would like to use the 24MHz XTAL to keep the internal clock ticking between resync periods and therefore do not need to fit a seperate RTC crystal.


Should I just tie the RTC XTAL_IN pin to 0V through a resistor and leave the output floating?