Tashkent university of information technologies subject of operating systems

Price level
Image "X" (SD1.0 specification, not currently used):
It is calculated from the CD-ROM's 150kb / s to 1-speed speed calculation method. Basically, they can be 6 times faster than a standard CD-ROM (900 kB / sec), while a high-speed SD card can transmit 66X (10 MB / sec) and 133x or higher. Some digital cameras require high-speed SD cards and constant shooting speeds for smooth shooting.
As of December 2005, most hardware came from the SD card specification 1.01, and the high-speed 133X hardware ranged from the 1.1 specification to 12.5 MB / sec.
SD2.0 specification:
The speed of normal cards and high-speed cars is defined as 2nd class, 4th class, 6th class and 10th class levels. There are cards that are Class11 and Class13 before the Class 10 card, but this standard is ultimately not a consensus with the SDA.
SD3.01 specification:
Also known as an ultra high speed card, the tariff is set as UHS-I and UHS-II. In the second quarter of 2013, only the UHS-I card was registered. UHS-II was released in the fourth quarter of 2012, but by 2014, in terms of technology development, UHS-I was enough to spend 2014 or more. The speed rating of the UHS-I card is divided into UHS-Class0 and UHS-Class1. UHS’s Class and SD2.0 are different, there is no clear Class0 card, and the literal meaning is a card that does not reach Class1. In the future, it can be generalized as Class0 . The Class1 has a maximum read speed of 104 MB / s, while the Class SD2.0 standard represents the smallest speed range.
The marker symbol on the card is shown in the figure.

Meeting different levels of reading speed and application requirements:

Opportunity level
SD card capacity is currently available in three levels, namely SD, SDHC and SDXC.
The following table shows the capacity level and the standard disk format:

SD memory capacity is 8MB, 16MB, 32MB, 64MB, 128MB, 256MB, 512MB, 1GB, 2GB.
SDHC capacity is 2GB, 4GB, 8GB, 16GB, 32GB.
SDXC capacity 32 GB, 48 GB, 64 GB, 128 GB, 256 GB, 512 GB, 1 TB, 2 TB