7.6.5 Power Sequence Timing

Power supplies must adhere to the following rules:

  • The VDDA supply must never be powered without VDDAU also powered.
  • The VDDA supply must never exceed the VDDAU supply by more than 0.5 V.
  • There is no power-up sequencing requirement, however all power supplies must reach operational levels within the time periods specified in Table 7-11.
  • There is no power-down sequencing or timing requirement for VDDP relative to VDDA, however VDDA must not be powered for an extended period of time without VDDP also at operational levels.
  • Following initial power-on, or if a power supply brownout occurs (i.e., either of the VDDA or VDDP supplies drops below operational limits), an internal power-on reset will be performed once all power supplies reach operational levels. Refer to the section Power-On Configuration Strap Timing for power-on reset requirements.
  • Do not drive input signals without power supplied to the device.
Attention: Violation of these specifications may damage the device.
Figure 7-4. Power Sequence Timing
Table 7-11. Power Sequence Timing
DescriptionSymbolMinTypMaxUnits

Additional
Information

VDDP supply turn-on time relative to VDDAtpon05msNote 1
Note:
  1. Design parameter, not tested.