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USB is not enumerated for Kinetics MK64FN microcontroller

Question asked by kirti raje on Apr 20, 2018
Latest reply on May 20, 2018 by kirti raje

Hello,

I have successfully accessed USB OTG on FRDM K64FN development board. I have used FSL_USB_STACK in device mode. Now I have designed our own board using same controller i.e MK64FN1M0VLL12 and trying to connect USB OTG on the same. The  connections for USB are as shown in attached image. My issue is that, USB is not getting enumerated when connected in port on new board. The difference between the CPU configuration of development board and designed board is that the dev board uses external reference clock of 50 MHz and I am using external crystal of 32 MHz as clock source. All other CPU settings are same for  both the boards.

Can any one help me to find out the cause of this issue.

 

Thanks in advance

Kirti

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