To support the higher capacity needs, SD cards are now
requiring a different design. The new SD 2.0
specification support 4GB and up is called Secure
Digital High Capacity (SDHC). The SD Association has
created and defined 3 different speed classes to help
you identify speed and performance capabilities/ minimum
requirements of SDHC cards and their SDHC host products.
For the detail on the SD 2.0 specification you may also
refer to http://www.sdcard.org.
Main Features:
- Fully compatible with the SD 2.0 standard
- Class 2, and Class 6 specification
- Original NAND Flash chip
- Support Error Correcting Code (ECC) to detect
and correct errors
- Mechanical Write Protection Switch
Because SDHC works differently (supports the new
higher capacity cards) this new cards format is NOT
backward compatible with legacy SD format host devices.
Cameras must be SDHC compatible to use SDHC cards,
though most SDHC compatible cameras should be able to
use regular lower capacity SD cards. However SDHC is not
backward compatible with SD and that means a 4GB SDHC
card will not work in a camera designed only for use
with SD cards. Most new digital cameras will be SDHC
compatible, but not all current cameras are. For example
the Canon Powershot G7m A71, A630, and A640; Nikon D40
are SDHC compatible. Canon just released firmware
updates for the 1Ds MK II, 1D MKII N and 1D MK II to
make them SDHC compatible.
The SD Association has created and defined 3 speed
classes to help users identify speed and performance
capabilities/ minimum requirements of SD/SDHC cards and
thehost products. The SD speed class ratings specify a
minimum sustained write speed for SDHC cards. Class 2:
2MB/s; Class 4: 4MB/s; Class 6: 6MB/s. Users can look
for the speed class logo to identify the performance
class of your memory cards and host devices.
All Ridata SD high capacity cards meet the
specifications for their type of memory and will work
with any device also meeting specification. Manufactures
of devices that use the memory can specify capacity
limitation and can fall outside of the specifications.
You can contact manufacturer for compatibility questions
Browse By Brand
