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MKL27: Unknown USB Device

Question asked by Lorenzo Conti on Jul 14, 2017
Latest reply on Jul 17, 2017 by Lorenzo Conti

Dear experts,

 

I am experiencing some problems while trying to get my custom MKL27 board recognized to my PC as Mass storage device. It's a fresh new MCU on the board. The device is recognized as follows in the windows device management:

 

Unknown USB Device (Device Descriptor Request Failed)

 

What could I be doing wrong? The USB connection is almost identical to FRDM-KL27 board.

 

Many thanks in advance.

 

Lore

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