Author Topic: where did all the lower end FPGAs go ??  (Read 6482 times)

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Online nctnico

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Re: where did all the lower end FPGAs go ??
« Reply #75 on: June 27, 2022, 08:34:19 am »
Anyone heard of Cologne Chip?  They are German and seem to have out the smallest part in their product line, 20kLUTs.  The LUT structure is a bit unique, with 8 inputs to a "LUT-tree" which can be configured as a pair of 4LUTs or something else I haven't found yet.  Only a single package, 324 pin, 0.8 mm BGA. 

The most interesting part is Digikey has them in stock!
Interesting indeed. Cologne chip has been around for several decades but I didn't know they where into FPGA.
« Last Edit: June 27, 2022, 08:36:37 am by nctnico »
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Offline asmi

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Re: where did all the lower end FPGAs go ??
« Reply #76 on: June 27, 2022, 02:06:35 pm »
Do you know if they're supported by Vivado Standard?  This makes it look like only the largest AU25P is supported by the free verison: https://www.xilinx.com/products/design-tools/vivado/vivado-ml.html#architecture.
I've asked this question during one of their webinars, and they confirmed that entire Artix US+ family will be available in free license.

Offline jayk

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Re: where did all the lower end FPGAs go ??
« Reply #77 on: June 27, 2022, 06:37:16 pm »
Good to hear.  I happened to talk to our Xilinx sales rep this morning and they're saying the lead-time on the Artix US+ isn't really any better than the Spartan-7 and Artix at this point.  They're saying the 'recovery' time for pretty much all parts is 2H 2023.
 

Offline SiliconWizard

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Re: where did all the lower end FPGAs go ??
« Reply #78 on: June 27, 2022, 06:48:41 pm »
They're saying the 'recovery' time for pretty much all parts is 2H 2023.

If only that were true.
 

Offline gnuarm

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Re: where did all the lower end FPGAs go ??
« Reply #79 on: June 28, 2022, 04:42:32 pm »
They're saying the 'recovery' time for pretty much all parts is 2H 2023.

If only that were true.

You guys do know, the chip makers are losing money too, right?  They would love to be selling more chips.  But they can only build new fabs so fast. 

It's weird that we got into this situation in the first place.  Does anyone really understand what happened?
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Offline Wiljan

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Re: where did all the lower end FPGAs go ??
« Reply #80 on: June 28, 2022, 04:53:52 pm »
Anyone heard of Cologne Chip?  They are German and seem to have out the smallest part in their product line, 20kLUTs.  The LUT structure is a bit unique, with 8 inputs to a "LUT-tree" which can be configured as a pair of 4LUTs or something else I haven't found yet. 
Interesting chip  :-+ In the documentation https://www.colognechip.com/programmable-logic/gatemate/#documentation
in the  "GateMate Primitives Library (March 2022)" pdf on page 45 it tells how the LUT are combined in a LUT tree wit up to 8 inputs, I did short hope the they actually had an 8 input LUT I could use as lookup table for 8x8 (256) ... but no luck here
 

Offline gnuarm

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Re: where did all the lower end FPGAs go ??
« Reply #81 on: June 28, 2022, 05:37:44 pm »
Now I'm disappointed.  I figured the LUT would be a pair of LUT4s with some clever combining logic.  But there are no LUT4s even.  They use LUT2s with more LUT2s to combine them.  So rather restricted in the logic which can be implemented in a single LUT-tree.  The LUT2 seems to be the actual primitive hardware element in the CPE Logic element.  They never show you how they can be connected or how many there are.  2 input what-not gates. 

I also noticed the chip doesn't have 3.3V I/Os either.  2.5V max it looks like.  That's a bigger problem and precludes this device from my current need.
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