I have had a Nexys Video for quite a while. I first thought this was normal behavior for the XC7A200T, but once I got an XC7K325T - and it does not demonstrate this - I started to think otherwise.
The behavior leading me to think it's faulty is this: I am hashing Blake-256 on it. When I use 4 cores of my design (as I use with my XC7A100T on my Nexys 4 DDR) it works fine. Now, this packs the XC7A100T mostly full, but the 200T still has room. So, I've tried packing 7 on it, as well as 8. While the bitstream is made fine, it fails upon flashing. It won't take more than six. I tried raising the clock just a bit - same issue. It's almost as if parts of the FPGA just don't want to be flashed or work. The XC7K325T, by the way, takes 12 cores so far at 150Mhz.
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Wolf0
I have had a Nexys Video for quite a while. I first thought this was normal behavior for the XC7A200T, but once I got an XC7K325T - and it does not demonstrate this - I started to think otherwise.
The behavior leading me to think it's faulty is this: I am hashing Blake-256 on it. When I use 4 cores of my design (as I use with my XC7A100T on my Nexys 4 DDR) it works fine. Now, this packs the XC7A100T mostly full, but the 200T still has room. So, I've tried packing 7 on it, as well as 8. While the bitstream is made fine, it fails upon flashing. It won't take more than six. I tried raising the clock just a bit - same issue. It's almost as if parts of the FPGA just don't want to be flashed or work. The XC7K325T, by the way, takes 12 cores so far at 150Mhz.
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