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Honored Contributor
Honored ContributorDDR2 HPCII v11.0 problem, thanks for help !
everything seems well, however, local_init_done is always low, what's wrong? I tried both the full calibration and "skip the calibration", it doesn't change anything, the local_init_done is alway...
Altera_ForumHonored Contributor
Honored ContributorI used Quartus 11.1, 13.0 and now 15.0. All same results.
Yes I am using my own PRESET, stolen from a design that worked for Cyclone II 8 years back. I am thinking that could be a problem. Do you have a PRESET for 1GB/2GB unbuffered DDR2? Thanks, I really appreciate your answers. I get two warnings from ALTMEMPHY: warning: Cannot meet tRTP requirement of 7.5 ns. For a Memory interface clock frequency of 125.0 MHz, the minimum is 8.8 ns. warning: Cannot meet tRRD requirement of 7.5 ns. For a Memory interface clock frequency of 125.0 MHz, the minimum is 8.8 ns. I checked Micron data sheets they are both 7.5ns. I dont know why Cyclone IVE-8 can not meet the timings
