lpcware

Changing the main frequency clock

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
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?

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