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Reset signal of K64

Question asked by Kiyoshi Matsuzaki on Jan 7, 2016
Latest reply on Apr 2, 2016 by Juandres Lazaro

Hi, all

 

I made custom boards using MK64FN1M0VLQ12 (144pin).

I received boards from integration company, adn I tried to write my software to the board by the P&E Micro Multilink Universal with the PROGACMP.

I push a Connect(Reset) button, then I got a dialog message of "Device is secure. Erase to unsecure?"

 

I checked reset pin of MK64, I saw a strange waveform.

 

MK64FN1M0VLQ12_reset.png

 

Here is my questions.

1. When any firmwares  are not written  to the MK64 ever, is this signal correct?

2. How should I do for writing firmware to MK64?

 

This is a schematic of my custom boards around riset pin and the debug interface.

 

MK64FN1M0VLQ12_schmatic.png

 

If you have any idea, please let me know.

 

Regards,

 

Kiyoshi Matsuzaki

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