In message 20040109021612.81164.qmail@web15208.mail.bjs.yahoo.com you wrote:
When using the UPM Burst Read settings whick worked on LITE_DW,I got the following best result by now.I wrote some UPMA Burst Read Words but without no better performance.
As I have pointed out a hundred times or more before: the culprit is usially NOT the UPM setting, but the initialization sequence of your SDRAM.
2.When setting DER as 0x51c7000f,I get the "good" results by over 70 continuing "go" commands:
This probably just hushes up the symptoms. Try runnign without the BDI attached. Does it work? No? You see... the problem was not fixed yet.
It seems that one more step could succeed.However,the truth hurts.I trapped in settings of UPM RAM Words and want to figure it out.
IT HAS NOTHING TO DO WITH THE UPM SETUP.
THE PROBLEM IS THE SDRAM INIT SEQUENCE.
[sorry for shouting]
Best regards,
Wolfgang Denk