I have used MK70FN1M0VMJ12 it is not coming out of reset mode after connecting to debugger

[shivakumarlv]

Hi all

I have used MK70FN1M0VMJ12 in our project out of three boards two are working fine. i am using universal multilink as a debugger and programmer. after flashing program it is continuously going to reset mode instead of main(). I have checked REST pin it is high.also find the attachment of JTAG debugger. please advice

[Carlos_Mendoza]

Hi Shivakumar,

After reviewing your JTAG connections I noticed that the pin 9 (PTA4/EZP_CS_b) is connected to ground, this will cause the MCU to enter in EZport mode after reset, we recommend to left this pin with a pull-up resistor to make sure it is kept high during the reset phase.

Please let me know if it helps!

Best Regards,

Carlos Mendoza

Technical Support Engineer