That's essentially the response I was expecting. I have a couple uses for this board already planned, so it would have been convenient, but I think we'll have to go with a low-cost FPGA board and drop-in a DDR3 core. Certainly a more flexible approach, if more expensive.
On Friday, January 30, 2015 at 11:14:54 AM UTC-5, Gerald wrote: > > Our interface is 16bits wide. We use DDR3L. We have no termination > resistors.Maximum memory is 2GB. There are no external pins for the DDR. > You would need to redesign the schematic and PCB. > > Not sure how trivial this is, but it in my mind would be a waste of time > and expensive.,. > > Gerald > > > On Fri, Jan 30, 2015 at 9:28 AM, <[email protected] <javascript:>> wrote: > >> I am not looking to expand the BBB's internal RAM nor use external RAM >> for any operational functions, and I realize what I am asking is not >> trivial. >> >> But, I want to ask before I start down a path that is going to be a >> nightmare. Is it practical to build an external interface to a standard >> DDR3 SODIMM for memory testing purposes? I won't need to operate at full >> speed, either, just perform read/write cycles to verify memory integrity >> after certain environmental tests. For this purpose we will likely need to >> use a fresh tester for each DIMM we want to test (probably dozens), so the >> tester should be inexpensive. I was hoping that something like the BBB >> might be a novel way to solve this problem rather than some of the existing >> ($1000's each) memory tester or FPGA eval boards. >> >> Is the answer as simple as "The AM335 DDR controller is hardwired to the >> onboard RAM and cannot be reconfigured to address external RAM in any way"? >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Gerald > > [email protected] <javascript:> > http://beagleboard.org/ > http://circuitco.com/support/ > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
