1/1

|
DDR-SDR Module> OK for DIMM?
by Unknown on Jun 24, 2007 |
Not available! | ||
|
Hello,
I have successfully used the ddr-sdr opencore to test discrete DDR chips (HYB25D256), but would like to use this core with a Registered DIMM. As far as I can see, the effective CL changes from 2 clocks to 3 clocks due to the 1 clock delay that the register adds. Is there anything else I need to keep in mind when trying to get the DIMM running with this core? Other things that stand out: 1) S0# and S1# - Selects physical banks, currently S1# is disabled and S0# is tied to cs (cs_qn) of the controller 2) CKE0 and CKE1 - CKE1 disabled and CKE0 tied to cke_q of the controller. Hmm... what am I missing? (It must be something because DDR reads from any address always return the last value that I wrote to DDR...). Thanks for any input - Stephan -- |
|||
1/1

