Hi Selim Olcer,
Thank you for your interest in NXP Semiconductor products and the opportunity to serve you.
I'd highly recommend you to use the ROM Power API by referring to the LPCOpen sample.
The LPCOpen sample has some demos which illustrate the approach of utilizing the ROM API and it's very helpful for you.
LPCOpen:
LPCOpen Software for LPC11XX|NXP
Have a great day,
Ping
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------