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MC9S12DP512 won't run at power on or reset

Question asked by Greg Meagher on Nov 10, 2017
Latest reply on Nov 16, 2017 by Greg Meagher

I have a board that is using a MC9S12DP512 controller.  We have used these many times in the past and I have never seen this problem before.  When running through CodeWarrior and the BDM, things go smoothly and I see no problem resetting and running my firmware.  However, at power on or upon a reset, the controller is failing to start.  From what I can see, the configuration and pin connections are the same as in all of our previous designs, so nothing is glaring at me.  I am a software engineer so I didn't do the design myself, but our electrical engineer took many aspects of this from legacy designs and will need to be pointed in the right direction for a solution.  I'm hoping that someone here can give me an idea of where to look for what could be keeping me from running without the BDM connection.  Thank you in advance for any advice that you can offer.

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