Does anyone know the max gpio speed for the cyclone II, III, and IV ? I know the ram speed for the II is close to 240 mhz and the IV is close to 450 mhz, i dont know the gpio speed for any though, Thanks chasemayer

Hopefully I am asking the right question and not been sold a bill of goods to upsale me, my experience is limited to PIC proccessing but I am looking for the right proccessor with alot of speed in the gpio area.

If you are talking about a PIO on a system with a Nios CPU it depends on many factors, mostly the CPU type, its frequency, the memory type and interface connected to the CPU instruction master port, the amount of cache and the kind of software environment you will build your application upon. If you really want high speed input/output you should consider using a DMA instead of a PIO component.

I Want to control a PATA SSD with it at high speeds (over 60 megabytes a second)

I built a PIC18f based system that controlled a compact flash using GPIO, The cyclone III has a end GPIO of about 250 MHZ from digging around the internet, I think this would be best for my project, what do you think ?

The FPGA itself is certainly capable of such speeds, but you won't be able to reach it by controlling the SSD in software and PIOs. You will need a dedicated controller with DMA support, such as this one (http://www.cast-inc.com/ip-cores/storage/ataif/cast_ataif-a.pdf). There is also an opensource core at opencores (http://opencores.org/project,ata) but IIRC only the first one (PIO mode) is fully stable.

Max Gpio mhz for cyclone II, III, IV ? | Altera Community

15 Replies

Altera_Forum
Honored Contributor
14 years ago
I've already mocked up a PATA header in altium, I want to make sure that I have not messed up any routes to the JTAG lines. OK What exactly is nios ?
Altera_Forum
Honored Contributor
14 years ago
I have decided to use the EP3C5E144C7N but where do i find the pinout and datasheets for that model ?
Altera_Forum
Honored Contributor
14 years ago
You should have a look at the design guidelines (http://www.altera.com/literature/an/an466.pdf), it will give you a lot of information on designing a board with the Cyclone III.
The whole handbook (http://www.altera.com/literature/lit-cyc3.jsp) is useful too.
Altera_Forum
Honored Contributor
14 years ago
--- Quote Start ---
but where do i find the pinout and datasheets for that model ?
--- Quote End ---

Diy you try www.altera.com? There's a page with pinout documents under the Cyclone III documentation page.
Altera_Forum
Honored Contributor
14 years ago
ok thank you guys !

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Max Gpio mhz for cyclone II, III, IV ?

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