T2080 POWER SEQUENCING

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T2080 POWER SEQUENCING

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Contributor I

Hi,

Is there any requirement of power sequencing in T2080 ,datasheet provides only the list of power rails?

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NXP TechSupport
NXP TechSupport

I could not say that the T2080 datasheet provides the list of power rails only.  Its section 3.2 “Power sequencing” clearly says that power rails must be applied in a specific sequence and requires all supplies be at their stable values within 400 ms.  Notice T2080 based  system may require the VDD supplies ramp prior to any of the I/O power. Because there is a brief period as the VDD powers up that the I/Os associated with applied  I/O supply may go from being  tristated to an indeterminate state (either driven to a logic one or zero).