Multiple choice technology embedded technologies

The PIU restart rank is refresh. What will be the restart rank of the corresponding SPM on that board?

  1. coldwtest

  2. refresh

  3. cold

  4. SPM are not affected by PIU restarts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When a PIU (Packet Interface Unit) restart rank is set to 'refresh', the corresponding SPM on that board undergoes a 'cold' restart. This is a cascading restart behavior where the PIU's refresh-level restart triggers a more severe cold restart of the associated SPM. Option C is correct.

AI explanation

When a PIU's restart rank is set to 'refresh,' the corresponding SPM circuit on that same board is restarted at the 'cold' rank rather than mirroring the PIU's own refresh rank — this reflects how restart severity cascades differently between the physical board unit and its logical SPM circuits. This is a defined restart-rank mapping specific to this hardware, not a case where SPMs are simply unaffected.

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