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why the voltage of RESET pin of KE02Z MCU is unstable?

Question asked by MA QINDONG on Oct 26, 2014
Latest reply on Oct 30, 2014 by Adrian Cano

I have a minimum system with the Freescale KE02Z64 MCU,and there are just three parts--power supply circuit, reset circuit and crystal oscillator  in this system. then i try to load code to the MCU with the JTAG interface using PE multilink universal. but I failed. the problem is that the signal of restet pin is as follow,TEK00000.PNG

P.S. the power is +5V.

p.p.s. the MCU is newly-welded,no codes in it. it's the first time to use the MCU.

p.p.p.s.the reset circuit and clock circuit are as follow.

捕获.PNG

how should i deal with this problem? i am needling your help?

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