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PRega1
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1 hour ago

Cyclone V nRST assertion upon nPOR

Hello, I am looking for a confirmation on whether the nRST pin is driven low upon a nPOR input assertion. I have found no definite answer in the HPS TRM (cv_5v4 dated 2024.12.03).

But HPS TRM version 1.3 (Nov 2012), Table 3-3 page 3-7 says 

with 

I ran an experiment today on our prototype, asserting nPOR once the system has boot-up (linux) and see no assertion of nRST pin. Also, in the Reset Manager register description, I see no configuration bit that would enable/disable nRST assertion upon nPOR.

Can someone confirm the unconditional assertion of nRST upon a nPOR as I understand from HPS TRM from Nov 2012.

Thanks, Best regard

Pascal

 

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