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frdm-kw40z could not detect by usb port

Question asked by 劉 欣展 on Jul 30, 2016
Latest reply on Aug 1, 2016 by vicentegomez

I have a frdm-kw40z,and then rework  two new component(MK20DX128VFM5, kw40z ) . 

my computer could not detect rework board( frdm-kw40z) by usb port.

 

so how can i do to solve this problem  ?

(Is it the new component no open sda ?  )

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