Occasional Contributor1) Need forum admin to help, I can not post any reply on below topic even use different browser.
2) answer to this topic:
I set memory burst length = 8, and use half rate.
Can I set local_size = 4, 8, 16 or even higher?
Re:burst read and write DDR2 using altmemphy - Intel Communities
Regular ContributorI think you should use local_size = 2.
New ContributorBut why?
In user guide, the max = 64;
when generate the ddr ip instance, local maxinum burstcount already set = 64.
Regular ContributorHello,
I hope you are doing well.
The DDR IP instance will be reflected by the IP setting.
You have set the Local Maximum Burst Count = 64.
Then the local_size width will be 6.
But the memory burst length is set to 8 beats and you are running the controller with a half rate.
So your local_size should be 2.
New ContributorThanks! The memory burst length can only be set 8 or 4. I am not sure what's the relation of memory burst length and local maxinum burst count? why can not set higher burst local_size?
Regular ContributorI don't have the exact reason on why you cannot set a higher local_size but I think it's the limitation on the controller side.
So you have to follow the document for your configuration.
