Red face is there sth. wrong with LPC1114

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Wu_Biao_Ti_.jpg (11060Bytes)


I had burn several LPC1114 in the circuit below.After I use it for hours, the PWM signal produce by LPC1114 became square wave limited between 3.3V and 2.5V. Is it possible that the LPC1114 is too unstable.Or the value of the resistor is not proper,or the may be sth. wrong with other parts of my circuit?

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You should post more

You  should post more information about your setup, so we can provide better advice.

How is your LPC1114 microprocessor powered? Is the circuit in the attached file powered from the same source? Pictures of your setup, circuit diagrams, and more description would be helpful.

We can only help if you provide good information.