Toshiba Memory Cards

Press Release: Toshiba and Trek Establish Forum to Promote SD Cards Embedding Wireless Communication Functions

Jun, 22, 2010 Tokyo—Toshiba Corporation today announced the launch of an industry forum to promote a new SD card that integrates Wi-Fi wireless communication with data storage capabilities. The forum, the "Standard Promotion Forum for Memory Cards Embedding Wireless LAN"* has been founded by Toshiba and Singapore-based Trek 2000 International Ltd.

In recent years, as digital cameras have achieved huge rates of market penetration, the need for quick and easy way to share photographs has grown. The new card offers an innovative solution that brings new capabilities to the already very popular SDHC format.

The card is designed to bring Wi-Fi functionality to digital still cameras that have an SDHC slot. Once in a camera, a card can recognize and communicate with the same type of card in another camera (on a one-to-one basis), and users can exchange photographs quickly and easily. It also allows users to upload and download photographs to and from a server without any need for a cable connection or transfers of the memory card.

The new card is compliant with the SD memory card standard, supports IEEE 802.11b/g and has an 8-gigabyte capacity. It can transfer both JPEG and RAW images, the two most widely used digital formats.

Toshiba and Trek will invite the participation of digital camera manufacturers and other interested parties in promoting the card, and in exchanges of technical information toward establishing standard specifications and expanding the use of the card.

Toshiba is a market leader in the development and manufacture of NAND flash memory, which is indispensable for today's personal digital devices. The company seeks to enhance and expand its memory business by proposing new applications for NAND flash memories.

Features of SD card embedding wireless communication functions

  • The ability to send and receive image data among digital still cameras equipped with an SDHC slot and the card.
  • Upload and downloads of digital photographs between a digital still camera equipped with an SDHC slot and the card, and in a Wi-Fi environment, and a server.
  • User management of image transmission and reception minimizes power consumption compared with current solution.
* Standard Promotion Forum for Memory Cards Embedding Wireless LAN is a provisional name and may be subject to change.

Toshiba Memory Cards
Toshiba Digital SD CardsToshiba Digital SD Cards are designed for use in many digital devices, including digital cameras, MP3 players, PDAs, cellular phones and camcorders. Please note that SDHC Cards are only compatible with Secure Digital High Capacity (SDHC) devices. Check your device instructions for SDHC card compatibility prior to purchase.
Toshiba 64GB SDX Card.

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  SD Flash Card Size (SDHC)
Please verify that your device such as cellular phone or digital camera supports SDHC cards. SDHC cards are not compatible with standard SD host devices and card readers, and will only work on SDHC host devices.
  Toshiba SDHC Memory Card - 16GB: $71.99
  Toshiba 4GB High Speed SDHC Memory Card: $15.00

Speeds

CompactFlash
IDE (ATA) emulation speed is usually specified in "x" ratings, e.g. 8x, 20x, 133x. This is the same system used for CD-ROMs and indicates the maximum transfer rate in the form of multiplier of the data rate of an audio CD, which is 150 KB/s. R = {K \cdot 150}, KB/sec where R = transfer rate, K = speed rating. For example, 20x rating means 20 * 150 KB/s = 3,000 KB/s = 3 MB/s.

These are manufacturer speed ratings and actual transfer speed may be higher or sometimes lower that one shown on a card

SecureDigital
There are different speeds of SD card available. The official unit of measurement is the Speed Class Rating; an older unit of measurement is the × rating.

Speed Class Rating

The Speed Class Rating is the official unit of speed measurement for SD Cards, defined by the SD Association. It is equal to 8 Mbit/s, and it measures the minimum write speeds based on "the best fragmented state where no memory unit is occupied

The following are the ratings of some currently available cards:

  • Class 2: 16 Mbit/s (2 MB/s)
  • Class 4: 32 Mbit/s (4 MB/s)
  • Class 6: 48 Mbit/s (6 MB/s)
  • Class 10: 80 Mbit/s (10 MB/s)
Even though the class ratings are defined by a governing body, like × speed ratings, class speed ratings are quoted by the manufacturers but unverified by any independent evaluation process.

Important differences between the Speed Class and the traditional CD-ROM drive speed measurement ("×" speed ratings) are:

  • 1. the ability of the host device to query the SD card for the speed class and determine the best location to store data that meets the performance required
  • 2. class speed defines the minimum transfer speed.
  • Since the class rating is readable by devices, they can issue a warning to the user if the inserted card's reported rating falls below the application's minimum requirement.
On 21 May 2009, Panasonic announced new class 10 SDHC cards, claiming that this new class is "part of SD Card Specification Ver.3.0". Toshiba also announced cards based on the new 3.0 spec As of December 2009, the SD Association's Web site does not include information on this new class or new specification.

× rating

The × rating is a unit of measurement equal to 1.2 Mbit/s. It is derived from the standard CD-ROM drive speed of 1.2 Mbit/s. Basic cards transfer data up to six times (6×) the data rate of the standard CD-ROM speed (7.2 Mbit/s vs 1.2 Mbit/s). The 2.0 specification defines speeds up to 200×, but unlike the class rating system, does not mandate that x-ratings measure the card's sustained write-speed. For most cards, the maximum read speed is typical faster than its maximum write speed, leading some manufacturers to use read-speed as the ×-rating measurement. Other vendors, such as (Kingston, use write-speed.[ This table lists common ratings and minimum transfer rates.
 
Rating Write Speed
(Mbit/s)
SD Class
7.2  
10× 12.0  
13× 16.0 2
26× 32.0 4
32× 38.4 5
40× 48.0 6
66× 80.0 10
100× 120.0 15
133× 160.0 20
150× 180.0 22
200× 240.0 30
266× 320.0 40
300× 360.0 45

 

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