Memory card
A memory card, sometimes called flash card or memory card, is a compact, rewritable storage medium can be stored on any data, such as text, images, audio and video. The data is stored by the flash memory technology. They are used for small mobile devices such as digital cameras or mobile phones, but also as a means for data port together with a USB stick to a personal computer.
Types
Most current devices use the flash technology, although other technologies are developed. There are a number of memory cards on the market:
- CompactFlash ( CF ) Type I, CompactFlash Type II, CompactFlash Serial ATA Transfer ( CFast ) type I, CFast Type II
- Memory Stick ( MS), Memory Stick Select, Memory Stick ROM, Memory Stick PRO, Memory Stick Duo, Memory Stick PRO Duo, Memory Stick PRO -HG Duo, Memory Stick XC Duo, Memory Stick XC -HG, Memory Stick Micro ( M2), Memory Stick HG Micro ( M2 -HG ), Memory Stick XC Micro ( M2 XC), Memory Stick XC -HG Micro ( M2 XC -HG )
- MultiMediaCard ( MMC), RS- MMC, MMC mobile, MMCmicro
- Secure Digital Memory Card ( SD), SDHC, SDXC, miniSD, mini SDHC, T- Flash / TransFlash, microSD, microSDHC, microSDHC
- SmartMedia (SM ) / Solid State Floppy Disc Card ( SSFDC ) is no longer manufactured
- XD -Picture Card ( xD)
Other storage media belonging to the pluggable flash storage devices are Sony SxS ( ExpressCard - based) and Panasonic P2 ( PCMCIA based).
No memory card in the proper sense, but listed here because of similar application and construction is the USB stick. There are also compact Memory Card Readers (without own memory ) with a dedicated slot for example, a micro SD card so that they serve as an adapter plug from the norm these cards to USB.
The flash memory cards are of different size, the storage capacity is usually directly corresponds to the price. The CompactFlash card is the size of a matchbook, while the MultiMediaCard (MMC) and the SD card are as big as a postage stamp in about. More recent developments are only the size of a fingernail. In 2009, memory cards with 64 gigabytes regularly in the trade.
Since 2010 offer Sony (formerly only Memory Stick ) and Olympus (formerly xD card and before SmartMedia card ) in their new models in addition to SD Card Slots. This means that the format war is prone to memory cards of SD Card.
Transmission speed
The transmission speed of memory cards is usually not given directly, but as a factor based on the reading speed of CD ( = 150 kB / s for the original single-speed or 1 × drives). This notation has starting spread of CD burners for other rewritable storage media. Example: SD card 50x = about 7.5 MB / s transfer speed. The terms high-speed or hyper speed, etc. are not subject to standardization, so that it is not possible to say that a high-speed card must be very fast. In addition, the methods for measuring velocities are not standardized. Thus, with a few large files exorbitant write values to determine which have no relevance in many small files.
A comparison of the X - factors of speed flash memory cards from different manufacturers should be noted however, that the individual manufacturers define this speed differently or not at all. Some definitions describe the X-factor based on the write speed, others on basis of the reading speed. Still others speak of the data transfer speed by which they mean both read and write speed.
With well-known manufacturers can be found datasheets that define the speed designation greater detail.
Overview of the memory card standards
Comments
Memory cards for video game consoles
Memory cards are here mainly use it to store savegames ( savegame ).
Manufacturer of game consoles usually do not adhere to standards for memory cards, so every game console system has its own memory card format, even if it is only from the construction form. The proprietary formats are intended to promote the sale of the original accessories; However, there is usually also memory cards from other manufacturers, which often also provide more memory available. Since the introduction of the Xbox in 2001, have more and more video game consoles, such as game consoles Wii, Xbox 360 and PlayStation 3, in addition to conventional memory cards and built-in memory in the form of a hard disk or flash memory.
The memory card is usually plugged into the console (for instance, products Neo Geo, Sega Saturn, PlayStation, PlayStation 2 and Nintendo GameCube ). In the Dreamcast memory card (here called VMU ) exactly as in the developed by Microsoft Xbox and the Nintendo 64, however, attached or plugged into the gamepad.
N64 Controller Pak
Nintendo GameCube
Sony PlayStation 2