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Analysis: Development Trends of Three Memory Cards
With the popularity of digital cameras and megapixel camera phones, the demand for memory cards continues to increase. As for the CF (compact flash memory) card, 1 GB of products have appeared, and 1 GB of small SD card products have also appeared, and are advancing to a larger capacity.
In terms of memory cards, there are both CF cards, multimedia cards, and memory sticks and SD cards that home appliance manufacturers use for security reasons. Memory sticks and SD cards now occupy most of the market, and due to the miniaturization and thinning of devices, there has been a more compact memory card for mobile phones.
Memory stick and SD card: large capacity miniaturization
Memory sticks have been developed for use in the AV field of home appliances. As a new series of memory sticks, memory sticks PRO and memory sticks that can realize high-capacity, high-speed transmission and high security have emerged.
The Memory Stick PRO is a large-capacity memory for recording high-definition movies with a maximum storage capacity of 32 GB. At the same time that 1GB products are shipped, Sundisk has begun to market 2GB high-capacity products. When this memory card is used for parallel transfer, the maximum data transfer speed is up to 20MBps and the maximum write speed is 1.88MBps.
The memory stick with storage function contains several 128MB memory to ensure high compatibility between devices.
The memory can be used according to the external switch. Various corresponding devices can be used, and content sorting and data cutting can be performed. Graded.
Similar to the memory stick, SD card data transfer speed is also very fast, and its application on AV devices, digital cameras, and PCs is increasing. Recently, manufacturers have begun to produce 1GB of high-capacity products.
Currently, the SDIO standard for I/O cards is being developed. Corresponding to this standard SD card slot equipped device, wireless LAN card and GPS card can be inserted.
Compact flash card: high speed data transfer In June 2004, the CFA (Compact Flash Memory Association) released a new standard for compact flash (version 2.0) that increased the speed of data transfer. A 1GB product based on the new standard is available from Sciendisc and Renesas. The maximum writing speed is 10MBps, which can speed up the shooting speed of digital cameras.
