"MK60DX256VLL10" RESET PIN

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"MK60DX256VLL10" RESET PIN

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hfabbasi
Contributor III

I have designed a circuit which uses MK60DX256VLL10 based on its development kit "TWR-K60D100M-KIT" . I have pulled up the RESET pin (pin # 52) as shown in figure but when I power up the circuit, RESET pin shows 0.9V due to which this controller is not detected in MCUExpresso for coding. I increased the value of capacitor from 100nF to 300nF but still voltage rises only to 1.1V. Any possible solution for this problem would be highly appreciated.

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hfabbasi
Contributor III

I connected EZP_CS_b port to the ground of microcontroller for just a second and then removed this grounding. Afterwards, I checked the Reset pin and it was showing 3.3V and finally controller was out of reset state. Then I was able to sucessfully download and debug my code to this controller.

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Robin_Shen
NXP TechSupport
NXP TechSupport

Hi hfabbasi,

Please check the hardware by refer: KQRUG, Kinetis K Quick Reference User Guide
1. RESET_b and NMI_b

2.1.3.4.1 RESET_b and NMI_b.jpg
2. Debug interface

2.1.5.3 Debug interface.jpg

 

Since you are using MCUXpresso IDE, then you can check the "Emergency Kinetis Device Recovery by Full Chip Erase".

Emergency Kinetis Device Recovery by Full Chip Erase.jpg

If still not work, then you may need to use the Kinetis_Recovery_Utility by refer: Recovering Cortex-M Microcontroller with a Power Glitch

Best Regards,
Robin
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hfabbasi
Contributor III

I connected EZP_CS_b port to the ground of microcontroller for just a second and then removed this grounding. Afterwards, I checked the Reset pin and it was showing 3.3V and finally controller was out of reset state. Then I was able to sucessfully download and debug my code to this controller.

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