Secure Digital Wikipedia. Secure Digital SD is a non volatilememory card format developed by the SD Card Association SDA for use in portable devices. The standard was introduced in August 1. San. Disk, Panasonic Matsushita Electric and Toshiba as an improvement over Multi. Media. Cards MMC,1 and has become the industry standard. The three companies formed SD 3. C, LLC, a company that licenses and enforces intellectual property rights associated with SD memory cards and SD host and ancillary products. 2The companies also formed the SD Association SDA, a non profit organization, in January 2. SD Card standards. 3 SDA today has about 1,0. The SDA uses several trademarkedlogos owned and licensed by SD 3. C to enforce compliance with its specifications and assure users of compatibility. 4OvervieweditSecure Digital includes four card families available in three different sizes. The four families are the original Standard Capacity SDSC, the High Capacity SDHC, the e. Xtended Capacity SDXC, and the SDIO, which combines inputoutput functions with data storage. 567 The three form factors are the original size, the mini size, and the micro size. Electrically passive adapters allow a smaller card to fit and function in a device built for a larger card. The SD cards small footprint is an ideal storage medium for smaller, thinner and more portable electronic devices. SD SDSCeditThe second generation Secure Digital SDSC or Secure Digital Standard Capacity card was developed to improve on the Multi. Media. Card MMC standard, which continued to evolve, but in a different direction. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get.
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