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druepy's avatar
druepy
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3 years ago

Altera Register Chain

Hello, I'm a student at Georgia Tech. I want to do some timing analysis on flip-flop/register chains. I've read the relevant material for the two devices I have access to - a Cyclone 5 and a Stratix...
Hdl
druepy's avatar
druepy
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3 years ago

Your answer is reasonable, however I don't quite find it acceptable in this given context. The handbook is an advertisement of the features the chip offers and reasons to use them. Why would you want to force this issue? I'm not sure, but I'm tasked with measuring this for a research paper. This feature has been advertised for over 20 years; this is quite astounding.

Because of this thread I've decided to find some old archived datasheets and handbooks. Stratix, Stratix 2, Stratix 3, Stratix 4, Cyclone 3, Cyclone 4, Cyclone 5. I see that it seems starting with the Arria V, the handbook no longer advertises this ability. The Cyclone 10 LP does advertise it, but the Cyclone 10 GX does not.

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druepy
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3 years ago

My edited response didn't come through.

I'm starting to draw the conclusion you proposed -- hardware guys added it but software guys didn't enable it. It's just that the handbook then shouldn't have advertised this feature over the years. I was also hoping that an employee might have access to be able to confirm that this was the case.