AnsweredAssumed Answered

Using a MC9S12C32 controller in a fairly wide temperature application and have occasionally seen the controller hang at hot operating temperatures.  Have noticed a sensitivity on the clock (XTAL) line - probing this signal or adding a small amount of capa

Question asked by Steve Ruef on Jan 28, 2016
Latest reply on Feb 11, 2016 by Radek Sestak

Using a MC9S12C32 controller in a fairly wide temperature application and have occasionally seen the controller hang at hot operating temperatures.  Have noticed a sensitivity on the clock (XTAL) line - probing this signal or adding a small amount of capacitance seems to alleviate the problem, but do not see any noticeable problem with the oscillator signal itself.  The oscillator is a Pierce configuration at fairly low frequency - 2.56MHz.  Has anyone run into this kind of problem?

 

oscillator circuit.jpg

Outcomes