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'[EE]: What will replace flash memory ?'
See EMMA project
See Versatile project (Intel & ST, EU funding. )
Crossbar "vertical stacked resistive" with eg Zinc oxide diodes for access.
ZnO used due to high process temperatures which bar usual materials
when layer on layer methods are used.
"Only" 5 micron at present. Gains are as much from vertical stacking.
Samsung working on similar.
- Quantum computer stuff - more states than you can fit into "reality".
- Mayhaps 'bits' of light slowed to m/s range and packed in tight.
- "A few atoms" TM per cell stuff.
- Buckminsterfullerene seems to keep turning up new attributes. Must
be good for high density memories too.
For real volume Flash has a way to go to outcompete electromechanical
storage. What WOULD alien visitors thin? !!!! "You use mechanically
rotating stuff !!! ?"
- Phase encoded light in optical fibre? (Even at TerraHertz range you
get ~ 100s of cycles per foot in free space. Play Bose-Einstein
tricks with it and you may get "rather more".
E&OE, YMMV, do not bend fold spindle or mutilate. TTFN.
> From a design point of view, I figure SD is a good interface;
> whatever comes out will be usable, and I'm insulated from the details
> by a smart controller.
> I'd think MMC would be a better choice... eMMC (embedded MMC - MMC chips
permanently fixed to the board) chils are already quite popular, and support
higher max rates (8-bit data, higher frequency, I think they might even be
talking about double-pumping?). Plus, no licensing fees for controller
manufacturers, just for implementers (if I remember correctly).
There are some embedded SD solutions out there, but I don't think they've
caught on quite as much.
Also, when you start striping data across multiple flash devices, you want
your own control logic, not something that's optimized for a single device.
Since this is what's done now in SSDs, raw flash/NAND is much preferrable to
solutions with integrated "intelligence"
On Wed, Jul 28, 2010 at 6:19 PM, Michael Rigby-Jones
<oclaro.com> wrote: Michael.Rigby-Jones
>> In Microcontrollers? The limited write capability there doesn't seem
>> to be a "real" problem. But TI claims that they will do FRAM versions
>> of MSP430 "soon"
> They told us that FRAM based Arm Cortex parts were in development and
> due next year.
FRAM is nice. If the cost goes down, I think it will gain quite some market
share in the MCU segment.
William \Chops\ Westfield
On Jul 28, 2010, at 1:07 AM, Marcel Birthelmer wrote:
> I'd think MMC would be a better choice... eMMC (embedded MMC - MMC
> chips permanently fixed to the board) chils are already quite
> popular, and support higher max rates (8-bit data, higher frequency,
> I think they might even be talking about double-pumping?).
Huh? Isn't it the other way around? MMC was first, and SD/SDHC added some pins and parallel modes for faster access? MMC cards seem to have all but disappeared, though in most cases the SD cards are backward compatible.
> Plus, no licensing fees for controller manufacturers, just for
> implementers (if I remember correctly).
The SD licensing issues ARE annoying.
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