This may be a dumb suggestion, but why not use some regular computer=20 laptop/desktop SDRAM in a SIMM module? It could be older very generic=20 stuff that sure seems likely to be supported by xilinx's software.=20 Physically too big? You could ask on a xilinx forum about the DRAMs from mouser, you'd be=20 much more likely to find that guy that knows it will work. Good luck! J V G wrote: > On Fri, Oct 14, 2011 at 9:05 PM, Bob Blick wrote: > >> On Friday, October 14, 2011 8:41 PM, "V G" >> wrote: >> >>> SIGH. The package is a 9x6 BGA and the ball pitch is 0.75mm. This is >>> going >>> to be very difficult to design. >> >> Ouch. 0.75mm is what I would consider micro-BGA, and not anything I >> would consider (at this date) possible to prototype with "in house". >> > > I need /some/ way to add memory to my FPGA. SRAM is wayyy too expensive i= n > the megabit range, DRAM is hard to use, and the cellularRAM by Micron is = in > a very small and almost impossible to prototype package. The only realist= ic > option I have here is the TSSOP DRAM. > > I know Xilinx's software generates DRAM controllers, but I've never done = it > before and I don't know how exactly this will all fit together with the > TSSOP DRAMs I'm currently browsing at Mouser. > > DRAMs: > http://nz.mouser.com/Semiconductors/Integrated-Circuits-ICs/Memory/DRAM/_= /N-6j75u?P=3D1z0xts6Z1z0y15pZ1z0xz7wZ1z0xttdZ1z0xtrtZ1yzt5m8Z1z0y16jZ1yzuyk= wZ1z0w6vwZ1z0sr05Z1z0w6phZ1z0sr02Z1z0w6qiZ1z0w0i3 > > The specs on the DRAMs look very attractive, including the speed. But I'm > feeling uneasy. I just need someone to say "hey don't worry man, the Xili= nx > memory controller generator will work nicely with those DRAMs and you'll = be > reading and writing in no time". --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .