T1022 POR cycle limit

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T1022 POR cycle limit

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jack_mcculloch
Contributor I

Hi,

On page 54 of the T1022 datasheet it states that:

"Only 300,000 POR cycles are permitted per lifetime of a
device. Note that this value is based on design estimates and is
preliminary."

I have a few questions about this.

What is a POR cycle? is it when all the power rails powered up then down or is it when the device is reset using PORESER_B? 

If it is the latter does this mean the device will be lifed if it enters a reset loop (watchdog fault, boot loop etc.) for an extended period of time?

As this is a preliminary value is there a more up to date value available?

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r8070z
NXP Employee
NXP Employee

POR cycle is when all the power rails powered up then down. The datasheet provides  up to date value available.

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cjs1
Contributor I

Does this also apply to the T4240?  (note on Datasheet rev2, p. 81)

What is the consequence of exceeding that number of cycles?

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