why my lpc822 PLL can not lock?

[lpcware]

Content originally posted in LPCWare by dpliu on Wed Oct 28 00:36:31 MST 2015
i use the same clock configuration codes which work well on lpc812,but can not lock on 822.
thanks a lot

[lpcware]

Content originally posted in LPCWare by lpcmunich on Thu Oct 29 04:51:16 MST 2015
Hi dpliu,
Please give more details so that others are able to help you.
Which clock source are you using (IRC/Crystal Oscillator/CLKIN)?
Is your hardware a custom built or our standard LCXpresso824-MAX board?
Can you paste your code snippet?