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KL05 MCU Reset PIN voltage errors

Question asked by Thooman Wang on Jul 12, 2014
Latest reply on Jul 13, 2014 by Thooman Wang

Use the KL05 MCU, battery (3V), use 10K or  4.7K resistor pull-up Reset PIN, decoupling capacitor of 1uF.

Measuring voltage Reset PIN is only about 1.48V, then after Jlink, Jlink Commander can identify MCU, but Jlink LEDs constantly flashing red light.

Remove decoupling capacitance, measurements  the Reset PIN voltage is noly about 0.35V .

 

What is this problem? What do you do?

 

Previously used KL03 MCU have experienced the same problem

 

Circuit no problem, reviewed by Freescale technical support engineers

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