Secure Digital (SD) is a non-volatile anamnesis agenda architecture developed by the SD Agenda Association (SDA) for use in carriageable devices. The SD technology is acclimated by added than 400 brands beyond dozens of artefact categories and added than 8,000 models.1
SD comprises several families of cards:2 the original, Standard-Capacity (SDSC) card, a High-Capacity (SDHC) agenda family, an eXtended-Capacity (SDXC) agenda family,3 and the SDIO4 ancestors with input/output functions rather than just abstracts storage.
SD aswell comprises three altered anatomy factors: the aboriginal size, the "mini" size, and the "micro" admeasurement (see illustration). Electrically acquiescent adaptors acquiesce the use of a abate agenda in a host accessory congenital to authority a beyond card. There are abounding combinations of anatomy factors and accessory families.
Host accessories that accede with newer versions of the blueprint accommodate astern affinity and acquire earlier SD cards, but earlier host accessories do not admit newer cards. The SDA uses several trademarked logos to accomplish acquiescence with its blueprint and assure users of compatibility.5 This commodity explains several factors that can anticipate the use of a newer SD card:
A newer agenda may action greater accommodation than the host accessory can handle.
A newer agenda may use a book arrangement the host accessory cannot navigate.
Use of an SDIO agenda requires the host accessory be advised for the input/output functions the agenda provides.
The alignment of the agenda was afflicted starting with the SDHC family.
Some vendors produced SDSC cards aloft 1 GB afore the SDA had connected a adjustment of accomplishing so.
SD comprises several families of cards:2 the original, Standard-Capacity (SDSC) card, a High-Capacity (SDHC) agenda family, an eXtended-Capacity (SDXC) agenda family,3 and the SDIO4 ancestors with input/output functions rather than just abstracts storage.
SD aswell comprises three altered anatomy factors: the aboriginal size, the "mini" size, and the "micro" admeasurement (see illustration). Electrically acquiescent adaptors acquiesce the use of a abate agenda in a host accessory congenital to authority a beyond card. There are abounding combinations of anatomy factors and accessory families.
Host accessories that accede with newer versions of the blueprint accommodate astern affinity and acquire earlier SD cards, but earlier host accessories do not admit newer cards. The SDA uses several trademarked logos to accomplish acquiescence with its blueprint and assure users of compatibility.5 This commodity explains several factors that can anticipate the use of a newer SD card:
A newer agenda may action greater accommodation than the host accessory can handle.
A newer agenda may use a book arrangement the host accessory cannot navigate.
Use of an SDIO agenda requires the host accessory be advised for the input/output functions the agenda provides.
The alignment of the agenda was afflicted starting with the SDHC family.
Some vendors produced SDSC cards aloft 1 GB afore the SDA had connected a adjustment of accomplishing so.
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