Feeds

SD cards to get 300MB/s bus

SD 4.0 spec roadmapped

High performance access to file storage

The guardians of the SD memory card specification announced version 3.0 of the technology less than a year ago, but that hasn't stopped them talking up version 4.0 already.

SDXC, launched on 7 January 2009, takes the card's capacity to 2TB and ups the maximum data transfer rate at the bus to 104MB/s.

SD 4.0 - which will also be branded SDXC, it seems - almost triples the bus speed, to 300MB/s.

SDXC

Like SD 3.0, 4.0 cards use the eXFAT file-system, so the maximum capacity will stay at 2TB. eXFAT is also known as FAT 64, the 64-bit upgrade to FAT 32.

Earlier this year, the SD Association said it was exploring SDXC's bus speed to 300MB/s. What it didn't say, but is now made clear, is that the upgrade will require a new pin array. SD cards current sport nine contacts on the edge of the card, but that is going to increase, the SD Association admitted.

SD 4.0 cards will have ten pins, one of which will handle the serialised data stream that runs at 300MB/s. The remainder will operate in parallel to deliver backwards compatibility. The size and shape of the card will not change.

The SD 4.0 spec is due to be completed by Spring 2010. ®

High performance access to file storage

More from The Register

next story
Feast your PUNY eyes on highest resolution phone display EVER
Too much pixel dust for your strained eyeballs to handle
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Microsoft lobs pre-release Windows Phone 8.1 at devs who dare
App makers can load it before anyone else, but if they do they're stuck with it
Report: Apple seeking to raise iPhone 6 price by a HUNDRED BUCKS
'Well, that 5c experiment didn't go so well – let's try the other direction'
Rounded corners? Pah! Amazon's '3D phone has eye-tracking tech'
Now THAT'S what we call a proper new feature
Zucker punched: Google gobbles Facebook-wooed Titan Aerospace
Up, up and away in my beautiful balloon flying broadband-bot
Nvidia gamers hit trifecta with driver, optimizer, and mobile upgrades
Li'l Shield moves up to Android 4.4.2 KitKat, GameStream comes to notebooks
AMD unveils Godzilla's graphics card – 'the world's fastest, period'
The Radeon R9 295X2: Water-cooled, 5,632 stream processors, 11.5TFLOPS
Sony battery recall as VAIO goes out with a bang, not a whimper
The perils of having Panasonic as a partner
NORKS' own smartmobe pegged as Chinese landfill Android
Fake kit in the hermit kingdom? That's just Kim Jong-un-believable!
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
HP ArcSight ESM solution helps Finansbank
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.