Hi yamazaki seiji
MCUXpresso SDK doesn't support LPC11U68. For the moment, there is no plan for that.
Our recommended SDK for LPC11U68 is LPCOpen
LPCOpen Software for LPC11XX|NXP
and our recommended IDE is MCUXpresso
MCUXpresso IDE|NXP
This is an useful article of
How to create a new LPC project using LPCOpen and MCUXpresso IDE
Have a great day,
Jennie Zhang
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