KEY=LOCKED
Security Key
KEY | Peripheral Lock Mask Key. 0 (LOCKED): PERIPHLOCK registers are locked and no valid values have been written to KEY. 1 (INTERMEDIATE): PERIPHLOCK registers are locked and the first valid value (0xA5) has been written to KEY. 2 (UNLOCKED): PERIPHLOCK registers are unlocked. Any subsequent writes to KEY will lock the interface. |