Content originally posted in LPCWare by Ex-Zero on Fri Jul 29 08:34:26 MST 2011
In cr_startup_lpcxx.c in your source folder System_Init() in system_LPCxxxx.c is called.
There you can find your PLL setting:
1. Change SYSPLLCLKSEL:
#define SYSPLLCLKSEL_Val 0x00000000
Now IRC is selected :)
2. Set 24MHz
#define SYSPLLCTRL_Val 0x00000041
See: Table 54. PLL configuration examples
That's all :eek: