I am looking for a SDRAM controller for Xilinx Spartan3 device in Verilog. xapp 134 has one which targets virtex 2 devices. Xilinx MIG can be used for DDR and DDR2 SDRAMs. Can a DDR SDRAM controller be used to drive SDR SDRAM? What other options do I have?
Yes, with some minor modifications this should be possible. But beware, there are no usefull free DDR controllers available for the Spartan3 series.
-- Programmeren in Almere? E-mail naar nico@nctdevpuntnl (punt=.)
I need this SDRAM controller too. There are some on OpenCores, but with gotchas.
No, unless it is a combined DDR/SDR controller, and those aren't common.
An SDR DRAM controller.
Write one? Assuming you have relatively modest performance requirements (which seems reasonabnle, or you'd be using DDR), it's not a huge task. My first significant piece of VHDl was an SDRAM controller, years ago using a FLEX10KE part!
SDR is really not that complicated, and the timing is fairly easy for modern devices to handle.
Cheers, Martin
-- martin.j.thompson@trw.com TRW Conekt - Consultancy in Engineering, Knowledge and Technology http://www.conekt.net/electronics.html
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