Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/NXP Semiconductors/LPC18xx/CCU2/PM#0x0
PD=NORMAL_OPERATION_
Power mode register
Initiate power-down mode
0 (NORMAL_OPERATION_): Normal operation.
1 (CLOCKS_WITH_WAKE_UP_): Clocks with wake-up mode enabled (W = 1) are disabled.
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data