11-28-2019 09:27 PM
Hi every body,
I have an fpga board with a kintex 7 fpga on it. Unfortunately the part and barcode isnt clear on it. Is there any way for diagnosis speed and temperature grade with vivado or any otherthing. How can i find the specefication of fpga wihout using the part and barcode on it?
Please help me.
11-29-2019 12:58 PM
12-08-2019 03:01 PM
Sorry for late reply.
>Or in the other word, is there any information include temprature grade of my fpga in idcode?
I don't have any idea to make sure tempareture grade in idcode by using jtag.
It' only confirmed by 2D mark on surface of fpga or by measuring delay value on measurement path for confirmation of quality of silicon...
12-09-2019 05:07 AM
Can you explain how to measured delay value on measurement path. This is a good idea but i havent any information aboat it. Is it possible to you that give me an example aboat it?
12-09-2019 05:44 AM - edited 12-09-2019 05:44 AM
If you need to speed-grade identify unknown chips, I would build some IPs doing something at different speeds and checking the (known) result. Prepare the bitstreams for -1, -2 and -3 speeds and flash them, driving an LED is all you need to show what they can run an cannot.
12-09-2019 06:17 AM
12-09-2019 06:25 AM
you know, never say no. To be safe, I wouldn't either say absolutely yes.
At least those test can bring some probabilistic insight.
what I absolutely agree with is that a reliable supplier is the best, but things are seldom as wished.
12-09-2019 07:33 AM
At Xilinx, in building 2,
There is a wall display with reclaimed, remarked parts, resold by unscrupulous vendors. With parts being scrapped, and remarked, and resold, if it is not a Xilinx authorized distributor, and you did not have full control of the chain of possesion, I would assume you have a remarked, resold part. Clear evidence is that the part is maked as the most expensive grade possible. This allows maximum profit to the scammer. Because of the handling and removal, these parts typically fail in less than a month. Because the scammers make a lot of money, these remarked parts may be skillfully done, and short of a tear-down, and using sophisticated tools, you will not know these are trash. They often wind up being sent back to Xilinx where they join their friends on display (because Xilinx can verify their origin, and no, they will not tell you how).
Just. Don't. Buy. From. Aynone. But. An. Authorized. Distributor.
End of story.
12-09-2019 07:43 AM
It seems like an important fraction of fakers' revenue go into the skillful disguisal, and that can be most of what the naive buyer pays, while the value they get must approach nil...
12-09-2019 10:08 PM
In view of the above, I think there is no way to know if it is fake.
In my opinion this is a problem that is better solved by xilinx. And this can be solved by inserting a code like idcode. This increases the reliability of users and clients using fpga
12-11-2019 07:41 AM
There is device DNA. Xilinx is able to track this back to who bought the device, when tested, die XY on wafer, lot ---
But, they are not going to help you unless you bought the device directly, or through the authorized distributor.
So, lose the chain of possession, the device becomes garbage,
Xilinx as no interest in doing anything more.