Tim Hanson wrote: > I've laid out an interface to a 133Mhz SDRAM, and the path lengths > were similar to yours. Works great. No LA connector, though. > Tim >
I just looked at the reference design for atmel AT91SAM9260 and it uses similar if not the same memory. Guess what, no clock termination. I can't find any gerbers though, and the pcb file is for snOrcad. If we could get a peek at the layout maybe some insight into a working layout. The only picture I've found is a top view of the board but it doesn't show the traces. The sdram appears not too close to the micro. Wish I could see those traces. Maybe Tim is is right. Still, I'd watch your timing budget closely and probably terminate the clock line. DJ, you could consider the XC3S200-4PQG208C for additional IO. $20 from digikey. _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
