Hi Jurgen stuber,
Thank you for your question.
I think it is the user manual's bug, we already report it, the user manual will updated this area in the next version.
LPC84X sector size is 1KB, page size is 64Byte, numbers is 1024.
Actually, our LPC84X code bundle also demonstrate it.

Wish it helps you!
Have a great day,
Kerry
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