8.1.3.2 Power-Up

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

1. Turn on the PUF domain:
   • Automatically controlled by SYSC at start-up if SFR_PUFCTL.PONOFFM=0 (default).
   • Manually controlled if SFR_PUFCTL.PONOFFM has been set to ‘1’.
     1. Enable the power switch HiZ by setting SFR_PUFCTL.PONOFFHZ=1.
     2. Wait for at least 60 µs.
     3. Enable the power switch LoZ by setting SFR_PUFCTL.PONOFFLZ=1.
2. Enable the PUF peripheral clock via the PMC.
3. Put the PUF in Active state by setting SFR_PUFCTL.PUFRST=0.