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MFG tools cant find my board

Question asked by Fred Kuo on Sep 17, 2014

I made a board based on Freescale's Sbare development board(MCIMX6Q-SDB),almost all the circuits are same,when I connect the board to the pc‘s usb port by otg wire ,MFG tools cant find the  board,  the host's device manager also cant find the board,NOW I know the OTG wire have no ploblem, I had tested the Voltage of the otg  circuit,the usb_otg_vbus is 5V. and I don't know where the problem is.