Content originally posted in LPCWare by fjrg76 on Tue Jul 28 22:48:54 MST 2015
Hi,
The LPC812-Max board works at 24 MHz. But what if I want to make it work slower (using the IRC) or at its max freq, say 30 MHz using a 10 MHz external crystal?
There are not clear ways to change the 24 MHz freq. I have followed the function calls chain and I couldn't see a single one that receives a parameter indicating not only the external crystal freq, but also a PLL multiplier. In other words, the 24 MHz freq seems to be fixed.
A design I'm working on is supposed to use a 10 MHz crystal (we bought hundreds of them :p ) in order to get 30 MHz system clock. For now 24 MHz is ok, but 30 MHz is a must.
Any ideas? Something that I have over-locked?