Feeds

SD cards to get 300MB/s bus

SD 4.0 spec roadmapped

Choosing a cloud hosting partner with confidence

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. ®

Website security in corporate America

More from The Register

next story
Bono: Apple will sort out monetising music where the labels failed
Remastered so hard it would be difficult or impossible to master it again
Oi, Tim Cook. Apple Watch. I DARE you to tell me, IN PERSON, that it's secure
State attorney demands Apple CEO bows the knee to him
4K-ing excellent TV is on its way ... in its own sweet time, natch
For decades Hollywood actually binned its 4K files. Doh!
Your chance to WIN the WORLD'S ONLY HANDHELD ZX SPECTRUM
Reg staff not allowed to enter, god dammit
Phones 4u website DIES as wounded mobe retailer struggles to stay above water
Founder blames 'ruthless network partners' for implosion
Monitors monitor's monitoring finds touch screens have 0.4% market share
Not four. Point four. Count yer booty again, Microsoft
Getting to the BOTTOM of the great office seating debate
Belay that toil, me hearty, and park your scurvy backside
prev story

Whitepapers

Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.