DFI - ddr-phy.org

Forum Discussions (214)

Discussions Replies Latest Activity

BIST implementation for DRAM (lpddr5)

HI , Can anyone suggest few inputs for bist implementation on DRAM (lpddr5)? Thanks Mayur


0 Dec 14, 2020

command truth table in DFI

Do we have any command truth table in  DFI interface, bocz in the dfi spec it was mentioned that, a signal DFI command ,but there is no val…

Started by Ravi

1 Dec 11, 2020
Reply by John MacLaren


Please note that there is a spammer (or more likely phisher) active - Yann Lamb. His activity is quite telling: http://www.ddr-phy.org/prof

Started by Dmitri Varsanofiev

1 Oct 22, 2020
Reply by John MacLaren

Command Mapping in case of LPDDR5

Hi In case of LPDDR5, how does the command mapping happens if we are working on 1:4 mode? In my waveform, the complete command (MRR) along…

Started by Shikha Singh

0 Aug 7, 2020

Any update to DFI 5.0 for LPDDR5 Link ECC support?

Are there any updates to DFI 5.0 spec specifically related to LPDDR5 Link ECC support? Is there any ongoing discussions? If so, when is the…

Started by Deepti Sriramagiri

2 Jun 25, 2020
Reply by Deepti Sriramagiri

Is there a comparison between dfi5.0 and previous generations anywhere?

Can I find a discussion on the differences between 4.0 and 5.0 anywhere?

Started by Martin Kiernicki

0 Jun 12, 2020

dfi_wrdata_mask and dfi_rddata_dbi width

Hi All, I have few queries. Kindly help me. 1) It is written in spec that both dfi_wrdata_mask and dfi_rddata_dbi have width equal to DBI W…

Started by Abhishek Das

0 Apr 4, 2020

Disconnect protocol?

Hi, Can anyone explain me the objective of "DFI disconnect protocol [Sec 13.0]" from LP4 DFI specification? I read the section but could no…

Started by Dhaval shah

4 Mar 25, 2020
Reply by Uma Baskaran

Data bus mapping in matched frequency, 1:2 frequency ratio systems

For a matched frequency system, the DFI data width is defined as (generally) 2x the PHY data width, but I do not see any information that e…

Started by Andrew Nance

0 Feb 7, 2020

Update vs Training

Can anyone explain difference between purposes why phy initiates update and master protocols?"

Started by pradeep vetapalem

3 Dec 11, 2019
Reply by Atanu Biswas


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