Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/NXP Semiconductors/LPC11E6x/SYSCON/SYSPLLSTAT#0x0
LOCK=NO_LOCK
System PLL status
PLL lock status
0 (NO_LOCK): No lock. PLL not locked
1 (LOCK): Lock. PLL locked
Reserved
https://github.com/cmsis-svd/cmsis-svd-data