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CPLD alternatives? http://forum.6502.org/viewtopic.php?f=10&t=7381	Page 1 of 1

Author:	fachat [ Wed Oct 26, 2022 11:22 am ]
Post subject:	CPLD alternatives?
So far I have used the Xilinx xc95288xl CPLD in my MicroPET and UltraPET designs. They are unfortunately still unobtainable right now, so I'm looking for alternatives. So far I've used the 5V tolerance of the xc9500xl series, but I've already updated the UltraPET CPU board to a 3.3V only (untested and unreleased as of now). Also, due to higher complexity of the Colour handling I've had to remove some features from the UltraPET CPLD code to make it fit and I'd like those features back and more... So, my requirements for an alternative are: - obtainable for a reasonable price - free dev environment (as in no cost, like Xilinx WebISE), supported on Linux hosts - 3.3V, no 5V tolerance needed - approx. 50%-100% larger (in terms of number of macro cells) - TQFP144 pinout - 5-7ns "speed" - instant on, no separate config ROM I'd even go for small FPGAs if they fulfill these reqs. Do you have any suggestions I should be looking at? I've looked at some alternatives mentioned here but they typically were too small.... Mamy thanks in advance André

Author:	BigEd [ Wed Oct 26, 2022 11:47 am ]
Post subject:	Re: CPLD alternatives?
It's a good question, but I think obtainable is the big one these days. Did you look at Lattice FPGAs? It looks like the MachX02 series is supported by the opensource toolchain yosys and nextpnr. Maybe a search like this will help - filtered by availability, sorted by price: https://www.mouser.co.uk/c/semiconducto ... rt=pricing

Author:

BigDumbDinosaur [ Wed Oct 26, 2022 5:10 pm ]

Post subject:

Re: CPLD alternatives?

Take a look at Atmel's ATF1508AS, which has 128 macrocells, and is available in PQFP-160, speeds down to 7.5ns, 3.3 volt operation and support for JTAG programming. The WinCUPL development package is free, but alas, only runs on Windows. My understanding is some users have done development using the Xilinx tools and then translated the output to a JED that is compatible with the Atmel part.

The ATF1508AS is in current production.

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Author:	BigEd [ Wed Oct 26, 2022 5:44 pm ]
Post subject:	Re: CPLD alternatives?
Certainly possible to run WinCUPL and CUPL on linux, using Wine.

Author:	plasmo [ Wed Oct 26, 2022 6:31 pm ]
Post subject:	Re: CPLD alternatives?
Max2 family CPLD operates at 3.3V and have more logic than XC95288. EPM570 has 570 logic elements and EPM1270 has 1270 logic elements. They are available in TQFP144 but you’ll need to buy them from china. Bill

Author:	fachat [ Fri Oct 28, 2022 8:49 pm ]
Post subject:	Re: CPLD alternatives?
I tried to look for details on the MachXO2, but mouser does not even have it in the catalog. Is this chip still current? I should probably add as requirement that the device should be one currently produced...

Author:	Proxy [ Fri Oct 28, 2022 9:07 pm ]
Post subject:	Re: CPLD alternatives?
the MachXO2 is still very much in production and supported by Lattice's current software. remember that we're still in a chip shortage! so it's simply sold out everywhere and won't be aviaible for a while. (maybe you had the "in stock" filter enabled on mouser so that's why none of MachXO2 chips showed up) here's the one i bought last year before the chip shortage fully kicked in: https://www.mouser.de/ProductDetail/842 ... 0HC5TG100C right now it sits at ~12 EUR, back when i bought it it was only ~8 EUR. i kinda wish i bought multiple of them because it's a pretty cool chip. lots of logic for little money

Author:	fachat [ Sat Oct 29, 2022 6:11 am ]
Post subject:	Re: CPLD alternatives?
Thanks, that helped. It seems the MachXO2 from the autocompletion works differently... only gives a couple of results, no FPGA - but using the brand name search shows it. Edit: I am on mobile and the drop down is way too large ... so I clicked the first MachXO2 entry, which was the category "!to be used with" and that of course is not the FPGA itself..

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