Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/NXP Semiconductors/LPC11Axx/SYSCON/SYSPLLSTAT#0x0
LOCK=PLL_NOT_LOCKED
System PLL status
PLL lock status
0 (PLL_NOT_LOCKED): PLL not locked
1 (PLL_LOCKED): PLL locked
Reserved
https://github.com/cmsis-svd/cmsis-svd-data