Honored ContributorFor the DDR3 Memory Controller w/ Uniphy IP (Cyclone V / Arria V family), there are some configuration options in Uniphy IP's GUI in Qsys.
What are these features under Mode Register 2 and what option should I select for each feature? 1. Auto selfrefresh method: Manual or Automatic? 2. Selfrefresh temperature: Normal or Extended? Please provide some guidelines. The AlteraEMIF guide isn't very clear.
Honored Contributor1) This depends whether you want to manually refresh the memory or allow it to happen automatically. This depends on your requirements. If you don't know I suggest you go for automatic.
2) Are you using an extended (industrial) temperature range FPGA? Cheers, AlexHonored ContributorHi Alex,
1) I don't want to manually control refresh rate. So I'll set to automatic as you suggested. Does this perform auto refresh or self-refresh? I recall there are two types of refresh when comes to DDR3, one being low-power mode. 2) Yes I'm using I-temp FPGA. I think we'll need double refresh rate due to high oper. temp. Should I set it to "Extended"? Also do I need to reduce the tREFI value by half as well? Thanks!Honored Contributor1) Refer to the "Controller Settings" section - page 3-9 - of the "ddr2 and ddr3 sdram controller with uniphy user guide (https://www.altera.com/ja_jp/pdfs/literature/hb/external-memory/emi_ddr3up_ug.pdf)" chapter of the Handbook. This explains use of both self-refresh and auto-refresh - UniPhy supports both - and discusses, briefly, the use of self-refresh in the context of a low-power mode and auto-refresh for efficiency.
2) Yes. I-temp FPGA, select "Extended". Cheers, Alex
