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Visitor jeydoux
Visitor
759 Views
Registered: ‎07-04-2018

3 DNA resources available

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Hello,

 

When trying to use to instantiate "DNA_PORTE2" primitive, I can see that there is 3 "DNA_PORTE2" primitives available on VU9P FPGA:

 

8. CONFIGURATION
----------------

+--------------------+--------+--------+-----------+-----------+
| Site Type          | Used | Fixed | Available | Util%  |
+--------------------+-------+---------+-----------+-----------+
| DNA_PORTE2 |       1 |         0 |     3       | 33.33  |

 

 

So I try to implement 3 "DNA_PORTE2" on a test design and I discovered that the 3 instances point on the same location (information from the graphical view on Vivado 2017.1).

 

Can you confirm that the DNA is unique by device and that the 3 primitives point to the same DNA unique id ?

 

 

Best

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Moderator
Moderator
818 Views
Registered: ‎11-04-2010

Re: 3 DNA resources available

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Hi, @jeydoux ,

Each device contains a single unique, 96-bit, embedded, device identifier (device DNA).

FPGA designs can access the DNA internally through a Device DNA Access Port, there is one DNA_PORTE2 in one SLR. 

Since VU9P has 3 SLRs, there are 3 DNA_PORTE2 primitives in the device.

The available value in Util report is correct. 

 

DNA_PORTE2 is only the channel to visit DNA. It's expected to have same DNA unique id.

 

 

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2 Replies
Moderator
Moderator
819 Views
Registered: ‎11-04-2010

Re: 3 DNA resources available

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Hi, @jeydoux ,

Each device contains a single unique, 96-bit, embedded, device identifier (device DNA).

FPGA designs can access the DNA internally through a Device DNA Access Port, there is one DNA_PORTE2 in one SLR. 

Since VU9P has 3 SLRs, there are 3 DNA_PORTE2 primitives in the device.

The available value in Util report is correct. 

 

DNA_PORTE2 is only the channel to visit DNA. It's expected to have same DNA unique id.

 

 

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Visitor jeydoux
Visitor
718 Views
Registered: ‎07-04-2018

Re: 3 DNA resources available

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Hi @hongh,

 

Thanks for the clear answer, it was our hypothesis.

 

Thanks

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