USBDM and MK20DN512ZVLL10

lskelectronics — Wed, 22 Dec 2021 13:09:11 GMT

Hello, i have a problem with communication between the MK20DN512ZVLL10 MCU and the USBDM debugger. When i click to "Detect Chip" in ARM Flash programmer tool, It looks like it communicates (even on oscilloscope it looks well), but after few seconds of detecting chip, communication is terminated with an error message. I also found that the MCU is not on the list. Maybe it is not supported by USBDM? If this can be the case, is it possible to add it? I tried it on two boards with the same result so the MCU should be not damaged.

I will be happy for any suggestion.

Thank you

Jakub

Re: USBDM and MK20DN512ZVLL10

Robin_Shen — Tue, 28 Dec 2021 02:35:09 GMT

The ARM Flash programmer tool seems support MK20DN512ZVLL10.
Have you tried mass erase?

About the waveform on reset_b, for blank new chip(after mass erase) it's normal phenomenon.
If you flash a program for MK20DN512VLL10 to MK20DN512ZVLL10, then hard fault will cause the reset too.
If you have a debugger from PEMicro, you can halt the MCU by refer: Recovering Cortex-M Microcontroller with a Power Glitch
If you have a debugger from Segger, you can refer: Communication error while accessing MDM-AP.

Best Regards,
Robin
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topic USBDM and MK20DN512ZVLL10 in Kinetis Microcontrollers

USBDM and MK20DN512ZVLL10

Re: USBDM and MK20DN512ZVLL10