Hi,
Please, install LPCScrypt in order to install the board’s device drivers. In the following link, LPCXpresso51U68 board for LPC51U68 MCU|NXP
Select step 2. Get Software
please check the second video, the video shows how to use LPCScrypt to program your board’s debug probe using this utility.
I hope this helps.
Have a great day,
Sol
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