Thursday, September 20, 2018
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Xiaomi Launches the Mi 8 Lite And Mi 8 Pro Smartphones in China
Airbnb to Comply with European Commission Demands, Facebook and Twitter Need to Do More
Pioneer Unveils New Flagship UDP-LX800 UHD BD Player
Nvidia Said to Chose TSMC Over Samsung For GPU Production
Japanese Cryptocurrency Exchange Zaif Hacked
New Samsung Galaxy A7 Smartphone Has Triple Lens Module
Nintendo Switch Online has Arrived
Cadence Tensilica DNA 100 Processor IP for On-Device AI
Active Discussions
Which of these DVD media are the best, most durable?
How to back up a PS2 DL game
Copy a protected DVD?
roxio issues with xp pro
Help make DVDInfoPro better with dvdinfomantis!!!
menu making
Optiarc AD-7260S review
cdrw trouble
 Home > News > Mobiles > SD Asso...
Last 7 Days News : SU MO TU WE TH FR SA All News

Monday, February 27, 2017
SD Association Adds Higher App Performance Class And Low Voltage Signaling

The SD Specification 6.0 expands support for mobile devices with Application Performance Class 2 (A2) more than doubling random read and write speeds guaranteed in the entry level App Performance Class 1 (A1), and new low voltage signaling (LVS) SD memory cards availability.

These new SD memory cards maintain full backwards compatibility.

The SDA introduced A1, the basic App Performance Class in November 2016 as its first and basic class. The new A2 is directed at special cases where hosts require even higher levels of performance. The newly introduced functions of Command Queuing, Cache, and Self-Maintenance are SD protocol functions that enable higher performance levels.

A2 memory cards deliver app-running performance by meeting or exceeding thefollowing levels under specified conditions:

  • Random Read Input-Output access Per Second (IOPS) of 4000
  • Write IOPS of 2000
  • Sustained Sequential performance of 10MB/s

The latest SD specification also allows SD host product manufacturers to offer devices that only support 1.8V Low Voltage Signaling (LVS), which complements the latest chip designs for higher performance and less power consumption. LVS SD memory cards maintain the SDA's commitment to backwards compatibility with legacy host products.

All memory cards supporting A2 will also support the new LVS signaling.

The following features are required on all products that indicate A2 performance:

  • Command Queue
    • Contributes mainly to random read performance
    • Multiple tasks can be handled at one time with arbitrary order
    • New tasks can be assigned during data transmission
  • Cache function
    • Contributes mainly to random write performance
    • Card may use higher speed volatile memory to cache the host data during memory card access operation
  • Self-Maintenance
    • Contributes to better memory access performance
    • Allows internal background data management
    • May be initiated either by card or by the host based on the card's internal needs

Low Voltage Signaling

A low voltage symbol identifies LV Interface supported SD products for users. An LVS host will bear the LV symbol somewhere on the product, package or manual. LVS device users need to use a corresponding SD memory card with an LV symbol for their LV-marked device.

On the other hand, an LVS card is usable by any host, including hosts that do not carry the LV symbol.

The LVS card is fully backwards compatible and usable by both conventional hosts using 3.3V signaling or by LVS hosts that operate only with 1.8V signaling An LVS host may operate only with the new LVS cards and conventional UHS-II cards are supported if a UHS-II mode is available by the host device.

RICOH R 360-degree, Live Streaming Camera Available For Pre-order        All News        Mobile World Congress 2017: Alcatel Introduces 4G LTE Windows 2-in-1: PLUS 12
Gionee Launch New Selfie-focused A1 And A1 Plus Smartphones     Mobiles News      MWC: Sony Adds Four New Photo-centric Smartphones To X-series

Get RSS feed Easy Print E-Mail this Message

Related News
SD Express Integrates PCIe and NVMe for up to 985 MBps Transfer Rate
Kingston Releases New 'Canvas' Series of Flash Cards
New UHS-III SD Cards Will Offer Up To 624 MBps Transfer Rates
Sony's New SD Card Goes Up To 300 MBps
SD Association Releases New App performance Class And Card Symbol
Toshiba to Implement Eyefi Connected Features in Next FlashAir SD Cards
U.S. To Develop Safety Guidelines For Self-driving Cars
Faster SD Cards For 4K Video Are Coming Soon
Ford Tripling Autonomous Vehicle Development Fleet
Ford And Google In Talks To Build Self-driving Cars: report
California Wants A Man Behind The Wheel Of Self-driving Cars
Samsung Unveils New PRO Plus 128GB microSD Memory Card

Most Popular News
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2018 - All rights reserved -
Privacy policy - Contact Us .