microcontrollers.

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microcontrollers.

Post  kosovohp on Thu Sep 30, 2010 11:47 am

All cards must support all three modes, except for microSD where SPI is optional. The cards must also support clock frequencies of up to 25 MHz for regular cards, and 50 MHz for high-speed cards.

UHS-I
SD Association unveiled the UHS-I specification for SDXC and SDHC cards. The new Ultra High Speed (UHS) symbol can be found exclusively on SDXC and SDHC products.[8] SDXC or SDHC products with the UHS-I symbol offer the fastest bus-interface speeds available today (2nd week of June 2010), capable of supporting data transfer speeds up to 104 Megabytes per second. UHS-I quadruples the existing maximum possible speed of 25 Megabytes per second. UHS bus interfaces are backwards compatible. SDXC UHS-I and SDHC UHS-I memory cards can achieve greatest performance when paired with a UHS-I device and are designed to allow consumers to record HD resolution videos, plus perform other simultaneous recording functions.

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