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Committed to Memory
Dear readers, I’ll warn you in advance that this blog post is sad and somewhat personal. If that’s not what you want to read right now, check out one of my other blog posts. By now you have probably seen the TV commercials showing the latest model vehicles that can automatically initiate braking when they […]
People are sometimes surprised when I tell them that more than $40 Billion of DRAM chips are sold every year – but have you ever wondered where they all go? The answer, once the obvious needs of personal, mobile and consumer devices have been met, is that many chips go into racks of servers and […]
As reported by Chipworks last week, the Apple iPhone 6S is using 2GB of LPDDR4 DRAM. This means that Apple is now joining other phones such as the LG Gflex2, the Samsung Galaxy S6, Xiaomi Mi Note Pro, HTC OneM9, and several others in using LPDDR4 RAM. The decision to use LPDDR4 appears to be […]
There was a huge technology announcement on 3D XPoint(tm) technology about 3 weeks ago – but without many details. I’m at the IDF2015 conference in San Francisco this week and we learned a lot more. During the big keynote presentation at IDF, 3D Xpoint(tm) was discussed for about 7 minutes, with information we had heard […]
It’s been about 9 months since I blogged on Samsung’s public roadmap and the fact that it carried some 3D Stacked DDR4 Devices using Through Silicon Vias (TSVs). Time for a quick update… Samsung’s website indicates that the M393A8G40D40 64GB DDR4 DIMM with 3DS TSV is in Mass Production status. The datasheet for the DIMM […]
A customer asked us, “Do I need DDR4 write CRC beyond a certain frequency?” The answer is far from simple; it’s dependent on many factors including the type of system it is, the other types of error correction (ECC) that may be in use, the system’s tolerance of errors, and the system’s ability to spare […]
AMD announced their new line of GPUs are using the new HBM (High Bandwidth Memory) DRAM technology yesterday. I have known these were coming for a while but the thing that surprised me the most was the relatively reasonable cost for the performance that they deliver – at least, the relationship between cost and benefit […]
Our friends in Synopsys’s Verification Group have been putting together an excellent set of Memory Verification IP (VIP) for DDR4, DDR3, LPDDR4, LPDDR3, that complements our other VIP for Flash, MIPI, PCIe, AMBA, Ethernet, HDMI, SATA, etc… The verification folks going on the road to tell people about our memory VIP in a series of […]
Faster than most people expected, LPDDR4 is here and shipping in two products! LG launched the LG Gflex2 Phone powered by the Qualcomm Snapdragon S810 processor with LPDDR4 DRAM in Korea earlier this year, followed by a global rollout in February and March. Samsung made a big event of the launch of the Galaxy S6 […]
I have written on the topic of Row Hammering in a White Paper I published last year (link here) but since it is in the spotlight recently I thought I’d dedicate a blog entry to it. I had never considered this to be a security hole until this morning. This morning Google Project Zero – […]
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About
This memorable blog is about DRAM in all its forms, especially the latest standards: DDR3, DDR4, LPDDR3 and LPDDR4. Nothing is off limits--the memory market, industry trends, technical advances, system-level issues, signal integrity, emerging standards, design IP, solutions to common problems, and other stories from the always entertaining memory industry.
The Authors
Graham Allan
Graham Allan is the Sr. Product Marketing Manager for DDR PHYs at Synopsys. Graham graduated from Carleton University's Electrical Engineering program with a passion for electronics that landed him in the field of DRAM design at Mosaid in Ottawa, Canada. Beginning at the 64Kb capacity, Graham worked on DRAM designs through to the 256Mb generation. Starting in 1992, Graham was a key contributor to the JEDEC standards for SDRAM, DDR SDRAM and DDR3 SDRAM. Graham holds over 20 patents in the field of DRAM and memory design.
Marc Greenberg
Marc Greenberg is the Director of Product Marketing for DDR Controller IP at Synopsys. Marc has 10 years of experience working with DDR Design IP and has held Technical and Product Marketing positions at Denali and Cadence. Marc has a further 10 years experience at Motorola in IP creation, IP management, and SoC Methodology roles in Europe and the USA. Marc holds a five-year Masters degree in Electronics from the University of Edinburgh in Scotland.
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