5.9.1.2 Power-Down Sequence
The Power-up sequence shall be reversed for the Power-down sequence.
- Assert PORn while all power supplies are still valid.
- Remove voltage sources connected to non-fail-safe inputs.
- Continue to hold PORn low and DVDD33 valid while other power supplies decay.
- Continue to hold PORn low while DVDD33 decays.
Figure 5-4 describes the Power-down Sequencing of the device.