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Beginner
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In power sequencing defined for Cyclone V E,Is there any time period specified between 2 sequences(ie , group 1: +1.1V , group2: +2.5V)?

Hello

In power sequencing defined for Cyclone V E,Is there any time period specified between 2 sequences(ie , group 1: +1.1V , group2: +2.5V)?

 I have observed the sentence : "Ramp up the power rails in Group 1 to a minimum of 80% of their full rail before Group 2 starts."

No Time difference between sequences is mentioned.

 

Thanks

Ashad

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5 Replies
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Employee
75 Views

Thanks Ashad for your inquiry. Let me get back to you after reviewing your question.

 

Thanks.

Eng Wei

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Employee
75 Views

Hi Ashad

 

Sorry for late response. For different power rail groups' power up sequence, we need to meet the voltage points requirement in order to meet the spec. I am quoting one of the external site's example diagram as follow (this is for Arria 10 requirement but the same concept applied to Cyclone V devices per Cyclone V spec):

power_sequence.png

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Beginner
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Thanks @ewO_Intel​ .

But in cyclone V handbook , only 2 groups are mentioned.

Also no power down sequence mentioned.

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Employee
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Hi Ashad

 

The example diagram above is showing the Arria10 device, we shall refer to the spec for the power rails available in Cyclone V. The recommended power down is in the reverse sequential order of the power up sequence.

 

Thanks.

Eng Wei

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Employee
71 Views

Hi Ashad

Let me know if you still have further inquiry for this topic before we proceed to close the ticket.

 

Thanks.

Eng Wei

 

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