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I am struggling with programming MK64FX512VLQ12 using FRDM KL25Z with USBDM on OpenSDA. USBDM can not connect to target chip.

Question asked by Tymoteusz Lipinski on May 23, 2016
Latest reply on May 25, 2016 by Kerry Zhou

Signals on CWDIO and SWDCLK are present. Even the Reset pull down works, but MK64 outpun on reset pin is a sawtooth like signal. I know that it's related with watchdog constantly resetting the MCU because it's empty.


I read a lot of troubleshooting on freescale community and I'm stuck. It is even possible with USBDM?


Maby I shall switch to other device in order to sucesfully download code to flash memory?