FPGA + Microcontroller - HELP

Hi all, What is a device consisting of FPGA and microntroller suitable to following reqiurement:

  1. my PCB board size is 2.5"x2.5" - small (so I need a chip which has FPGA and Microcontroller ? )
  2. FPGA portion has minimum 28 JK FlipFlops, 28 shift registers, and the rest for IO and state machine, input clock 100 Mhz minimum.
  3. microcontroller size has 2 serial ports, USB. Any advice will be appreciated. Loc
Reply to
LOC
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There is no Microcontroller plus FPGA, except you mean a microcontroller inside an FPGA. Yes, they do exist. From 100k gates up. EG the Altera Cyclone family.

Rene

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Reply to
Rene Tschaggelar

Don't know much about them, but Atmel has a "FPSLIC" device which has both. I suspect that like most FPGAs, there aren't any JK F/Fs. However you can synthesize them with D's and logic. USB? Probably not native, but surely with all that horsepower you can perform the necessary logic; all you need is some buffering outside -- don't think you'll escape that.

HTH -- -frank

Reply to
Frank Miles

AVR + FPGA => ATMEL "FPSLIC" USB to RS232 => FTDI chip

Kind regards, Laurent

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Reply to
Amontec, Larry

This is quite a small logic resource. Small uC + FPGA have been market failures, because they could not match enough users requirements.

More flexible is to use a slightly larger FPGA, and a Soft-CPU ( which scales, and follows process), or to look at

ST STR711 family : USB+Ports+FLASH+SomeConfigLOGIC, ARM core

ST uPSD33xx family : USB+Ports+FLASH+SomeConfigLOGIC, Turbo51 or do a Two-package Solution (Which a FPGA+Loader is anyway)

SiLabs : USB+Ports+FLASH+Debug, small packages plus a Small package CPLDs 64-128MC from Altera/Atmel/Xilinx/Lattice

-jg

Reply to
Jim Granville

Does anyone know the price for FPSLICs? (largest ones)

I'm also interested in dev. boards with ARM processor and FPGA (low cost and small size).

I know just one:

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I'd like to know what other can offer, but I haven't found any.

Oh, BTW NEC has SystemOnChip Lite

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But it cost too much (about 5000$ just for the board).

BR, Slawc

Reply to
slawc

Devices are fairly cheap (

Reply to
Mike Harrison

Digikey show the smallest ones ~$20, and the largest ones ~$70. (excludes the external loader prom)

Note these devices have a hard-ceiling to their relatively small code size of 8K/16K opcodes. Go past that, and it's drop-dead time....

-jg

Reply to
Jim Granville

Much lower cost in volume. < $5 possible. There are people that work on Dynamic Link Libraries allowing the code to be expanded. The AT94KxxAX series will have an external databus, allowing you to easily expand the data (but not the instruction) It runs at 40 Mhz so the part could conceivable run an interpreter in the internal RAM and load code from the external memory.

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Reply to
Ulf Samuelsson

That is not so small. It depends on what more you need on the board...

Why do you need a FPGA? Timing? With a 32 bit microcontroller/DSP you can read 32 signals in one external read. An then make any manipulaton you like internally. (Using internal memory only)

32 bit microcontrollers are more likely to have serial ports and USB. (why both BTW?) And these have to fit on the board too, I guess.

/RogerL

Reply to
Roger Larsson

CPLD is more than enough for this.

No existing microcontroller can deal with 100 MHz, not even 128 bits bus.

Reply to
Linnix

code to be

easily

the

So does this AX part exist somewhere? I can't find any info on it at the web site. Is there a data sheet? What size is the $5 part and what "volume". Can you project price for 1000 quantity on a part with

20 K gates? I know the current AL line does not have that size, so if the AX doesn't as well, I would need to bump up to the 40K gate part.

Will the part be pin compatible or are you going to a new socket? Also, are you adding any new packages? The QFP208 is a very large package. A 256 pin BGA would be nice.

Reply to
spamgoeshere4

will = futurum, but I have seen STK594s with AX chips running. The first chip will be the 10, followed by the 40 and then the 05. I think you have to wait until next year for the 40. They are pin compatible with the AL series, but need 1.8V core Vcc. There should be an app note on Atmels Website how to use the AL until AX is available. There will be new (smaller) packages. I think the AT94Sxx are in 256 BGA, with the configurator internally.

The System Design speed has improved quite a lot with the latest patch. Did not work so well when AVR Studio 4 was first released, since Studio stole all the CPU. I wrote an QSPI app note and I estimate that the Modelsim/AVR Studio coverification runs 10-15 x faster than the original 2.0.

Pricing you have to get from your local Atmel source. I get slapped on the fingers if I do pricing.

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Best Regard
Ulf Samuelsson
Reply to
Ulf Samuelsson

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