8.1.3.3 Power-Down

To power-down the PUF, the sequence below must be followed:

  1. Put the PUF in Reset state by setting SFR_PUFCTL.PUFRST=1.
  2. Disable the PUF peripheral clock via the PMC.
  3. Disable the power switch LoZ by setting SFR_PUFCTL.PONOFFLZ=0.
  4. Disable the power switch HiZ by setting SFR_PUFCTL.PONOFFHZ=0.