Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by coatesm on Thu Oct 07 03:57:02 MST 2010

I'm currently a little confused, the user manual for the LPC11xx devices suggests that there are 3 oscillators built into the device, the IRC oscillator, the watchdog oscillator and the system oscillator.  I can't seem to find what frequency the "system oscillator" is?  The "SYSOSCCTRL" register allows us to select a frequency range for this oscillator, and to bypass it, but I cannot find a way of setting the frequency to a known value?  Is it perhaps the case that the "system oscillator" is in fact a buffer for an external crystal input and can be bypassed to enable use of an external digital clock signal?