The latest enhancements to the HBM2 standard will clearly be appreciated by developers of memory bandwidth-hungry ASICs, however in order to add support of HBM2E to their designs, they are also going to need an appropriate controller as well as physical interface. For many companies developing of such IP in-house does not make financial sense, so Rambus has designed a highly-integrated HBM2E solution for licensing.

The HBM2E standard supports 12-Hi DRAM stacks as well as memory devices of up to 16 Gbps, thus enabling to build up to 24 GB stacks using a 1024-bit bus. At the same time, the new specification officially supports data rates of up to 3.2 Gbps, which results in 409.6 GB/s bandwidth per stack. Rambus’s HBM2E solution includes a controller that can work with 12-Hi KGSDs (known good stack dies) as well as a verified 1024-bit PHY that supports speeds of up to 3.2 Gbps. 

The Rambus HBM2E controller core (originally developed by Northwest Logic) is DFI 3.1 compatible (with appropriate extensions) and supports AXI, OCP or proprietary interfaces to connect to integrator logic. Meanwhile, the controller also supports Look-Ahead command processing (a standard way to trim latencies) as well as channel densities of up to 24 Gb.

Licensees of Rambus’s HBM2E solution will get everything they need to integrate it into their designs, including source code of the controller (in a bid to synthesize it for a particular process technology) as well as fully-characterized hard macros (GDSII) of the interface. Alternatively, engineers from Rambus can help integrate the HBM2E IP support for a fee.

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Source: Rambus

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  • DeeDee - Sunday, May 31, 2020 - link

    Rambus Receives Decision in SK Hynix Case

    Rambus entitled to compensation for infringement based on fair and reasonable royalty rates

    SUNNYVALE, CALIFORNIA, UNITED STATES – 09/23/2012 – Rambus Inc. (Nasdaq:RMBS), one of the world’s premier technology licensing companies, today announced that the judge for the Northern District of California (NDCA) has issued his decision in the matter with SK Hynix. The Honorable Ronald M. Whyte has found that the Rambus patents in this case are valid and infringed by SK Hynix and Rambus is entitled to receive royalty payments for past infringement based on reasonable and non-discriminatory (RAND) rates.

    “This is a positive result as it is consistent with what we’ve been seeking all along – reasonable compensation for the use of our patented inventions,” said Thomas Lavelle, senior vice president and general counsel at Rambus. “We appreciate the Court’s extensive efforts in working through years of complex arguments. While this decision does not provide SK Hynix with a going-forward license, we are hopeful it will lead to putting this matter behind us completely and allow us to reach reasonable agreements.”

    In his ruling, Judge Whyte found that Rambus executed its document retention practices during a time when it reasonably anticipated litigation, and thus willfully spoliated evidence, but also found that Rambus did not deliberately destroy documents it knew to be damaging. The parties have been ordered to provide briefs on the issue of the damages SK Hynix will need to pay Rambus.

    Rambus management will discuss this decision during a special conference call on Monday, September 24, 2012 at 6:00 a.m. PT. The call will be webcast and can be accessed through the Rambus website. A replay will be available following the call on Rambus’ Investor Relations website or for one week at the following numbers: (855) 859-2056 (domestic) or (404) 537-3406 (international) with the ID# 34575979.

    Background of the Matter

    This case was originally filed by SK Hynix against Rambus in August 2000. The case was split into three separate phases with Rambus prevailing in all three phases. The first phase considered SK Hynix’s allegations that certain Rambus patents should be unenforceable under the doctrine of unclean hands and spoliation
  • DeeDee - Sunday, May 31, 2020 - link

    drenxnx, very good point. But what's scary about some people is that their methodology
    of thought can be dangerous. I'm not saying just because of this but for any other
    important reason:

    It Ain’t What You Don’t Know That Gets You Into Trouble. It’s What You Know for Sure That Just Ain’t So - Mark Twain.
  • Sahrin - Friday, March 6, 2020 - link

    AMD put 16GB of HBM on the $700 Radeon VII.

    They're crazy if they don't think there's a market for this tech on a CPU.
  • MrEcho - Friday, March 6, 2020 - link

    Im just waiting for this to happen. And now with the memory controller on its on chip...
  • close - Monday, March 9, 2020 - link

    Would be nice for highly integrated systems (laptops, AIOs, and such, assuming the power consumption is kept in check), or if you could still expand the memory using regular DDR DIMMs. But this implies having more complexity on the IMC side. Also trying to fit another 4 dies (for 64GB of RAM) today on something like a 3700X would make for a crowded package.
  • MDD1963 - Saturday, March 7, 2020 - link

    TIme for RAMBUS to file a lawsuit over other vendors perhaps using bits and bytes and stuff....and transferring and from!
  • Lord of the Bored - Saturday, March 7, 2020 - link

    Rambus is still around? Why aren't they dead yet?
  • FreckledTrout - Saturday, March 7, 2020 - link

    Because they keep coming up with new ideas and selling IP. They are a hybrid patent troll and actual make new IP.
  • electronicschlong - Saturday, March 7, 2020 - link

    Once again Rambus isnt making a product or service, they're making a patent to sue innovators. Rambus is a parasite on the industry and the world will be better when they disappear.
  • Yojimbo - Saturday, March 7, 2020 - link

    They are making a design which they patent and license to anyone who wants to use it. If they didn't license the design from RAMBUS they'd have to license it from someone else or design it themselves. Designing it themselves would mean hiring people with the expertise to do it. Apparently, RAMBUS is a lower cost, or higher quality, designer. It's a standard service that is a key part of the tech industry. It is performed by many companies and relied on by many companies that make products.

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