HOME    COMMUNITY    BLOGS & FORUMS    To USB or Not to USB
To USB or Not to USB
  • About

    Covering the latest trends and topics in USB IP.

    I started working on USB in 1995, starting with the world’s first BIOS that supported USB Keyboards and Mice while at Award Software. After a departure into embedded systems software for real-time operating systems, I returned to USB IP cores and software at inSilicon, one of the leading suppliers of USB IP. In 2002, inSilicon was acquired by Synopsys and I’ve been here since. I also served as Chairman of the USB On-The-Go Working Group for the USB Implementers Forum from 2004-2006.

    I received an M.B.A. from Santa Clara University and an M.S. in Engineering from University of California Irvine, and a B.S. in Engineering from the University of Minnesota. I’m a licensed Professional Engineer in Civil Engineering in the State of California
    - Eric Huang

SDXC and USB 3.0

Posted by Eric Huang on August 4th, 2009

 

Toshiba has announced that they will go into production of SDXC cards in Q1 2010.  These SDXC cards is the next generation of SD card that will be used in digital cameras, mobile phones, media players, and camcorders to store pictures, video and music.

SDXC specification supports 104 Megabytes per second throughput today and up to 300 Megabytes per second in the future.  This is a lot faster than today’s USB 2.0 32-35 Megabytes per second.  USB 2.0 just will not be fast enough.

The next question someone will ask is: Is the flash memory fast enough to handle these speeds?

The answer is:  Yes, but it will cost more (at least initially).  Memory just needs to be put in parallel so that it can be read or written to faster and simultaneously.  I would guess that early memory will be designed to the 104 MBps standard to save on cost, with premium manufacturers designing even higher, and as prices come down, the faster speeds get implemented.

You can read the SDXC announcement from Toshiba here:

http://news.cnet.com/8301-13580_3-10302756-39.html

You can read the SDXC specification here:

http://www.sdcard.org/developers/tech/sdxc

I’m also burying some news on USB 3.0 Hosts here:

Apparently ASUS has cancelled their motherboard with USB 3.0 Host.  You can read 2 articles here:

http://www.theinquirer.net/inquirer/news/1495417/asus-cancels-usb-motherboard

ASUS is quoted as saying the motherboard was cancelled for “not for any particularly interesting reasons”   It should be noted that the motherboard was/is a high-end premium motherboard.

Tom’s Hardware speculates reasons here:  http://www.tomshardware.com/news/Asus-USB-3.0-Motherboard-PC,8368.html

Let’s hope that NEC is on track for their deployment of USB 3.0 Hosts.

Share and Enjoy:
  • del.icio.us
  • Digg
  • Facebook
  • Google Bookmarks
  • Print
  • Twitter
  • StumbleUpon
  • LinkedIn
  • RSS