DFI - ddr-phy.org

Mohamed Rayan
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Mohamed Rayan's Discussions

DDR5 CA bus mapping onto DFI address
1 Reply

Hi,DFI specs 5.0 is not clear to me in mapping CA bus onto DFI address for DDR5,What I found so far is the following: "For low power memories and the latest DDR DRAMs, the CA bus is mapped onto to…Continue

Started this discussion. Last reply by Mohamed Rayan Apr 8.

Mapping DDR4 PDA to DFI
1 Reply

PDA(Per DRAM addressability) is DDR4 feature which has the following specifications:Enable PDA mode using MR3 bit “A4=1”.In the ‘per DRAM addressability’ mode, only MRS commands are allowed.The mode…Continue

Started this discussion. Last reply by John MacLaren Nov 17, 2017.

DDR5 and LPDDR5 DFI Specs
3 Replies

Hello,Is there any updates related to DFI specifications for LPDDR5 or DDR5?Thanks in advance,MohamedContinue

Started this discussion. Last reply by John MacLaren Jan 31, 2018.

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Latest Activity

Mohamed Rayan replied to Mohamed Rayan's discussion DDR5 CA bus mapping onto DFI address
"Hi,Any updates here please"
Apr 8
John MacLaren replied to Mohamed Rayan's discussion DDR5 and LPDDR5 DFI Specs
"Hi Mohamed, The specification is entering review; it should be available in March. Thanks, John"
Jan 31, 2018
Mohamed Rayan commented on Naveenkumar's blog post DFi5.0
"Hi John, Does DFI 5.0 support of GDDRs? Regards,Mohamed"
Jan 22, 2018
Mohamed Rayan replied to Mohamed Rayan's discussion DDR5 and LPDDR5 DFI Specs
"Hi John, Is there any updates regarding to DDR5 and LPDDR5 DFI standard specifications? Thanks in advance,Mohamed"
Jan 22, 2018
John MacLaren replied to Mohamed Rayan's discussion Mapping DDR4 PDA to DFI
"Hi Mohamed, The DFI 4.0 states the following in Memory Topology-Specific Features (DFI 4.0) "DRAM features supported but not explicitly covered by DFI are not included in the matrix. These include: DQ VREF training Per DRAM…"
Nov 17, 2017
John MacLaren replied to Mohamed Rayan's discussion DDR5 and LPDDR5 DFI Specs
"Hi Mohamed, DFI changes are in progress for DDR5 and LPDDR5, hope to publish preliminary spec by end of the year. Thanks, John"
Oct 23, 2017

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