Computer RAM


RAM

Random Access Memory or RAM is the up gradable type of computer memory that can be accessed easily. It is named as Random access memory because any byte can be accessed without touching the preceding byte. SAM or Serial Access Memory is the opposite type in which the memory is arranged in a series of memory cells that can accessed only in a sequential way. RAM is an essential part of computer and Printers. RAM can be classified into DRAM and SRAM. DRAM or Dynamic Random Access Memory which needs to be refreshed thousands of times per second. SRAM or Static Random Access Memory is faster than DRAM so that refreshing in not necessary. More over the SRAM gives the access time as low as 10 nano seconds compared to the 60 nano seconds of DRAM. But due to the high cost of SRAM, DRAM is commonly used in computers. RAM has volatile memory which will wipe off when the power is switched off. Virtual memory is the method of extending the RAM capacity with a part of the Hard drive and Shadow RAM is another kind of RAM in which the contents of the ROM is copied to read-write memory to reduce the access time. RAM disk is the partitioned region of the physical RAM that can act as a faster Hard disk.

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Micro SD (TF) Card How Stuff Works


microsd-2

Micro SD card (Micro Secure Digital card) is the flash memory card widely used as storage device in Digital camera, Mobile phones, MP3 players etc. The Micro SD format was originally called as T-Flash card before adopted by the SD card association. The Trans Flash (TF) cards and Micro SD cards are identical in format and can be used in devices supporting both cards. But unlike TF card, Micro SD cards have the capability of supporting the NFC ( Near Field Communication) system.
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Computer RAM. How Stuff Works


RAM

Random Access Memory or RAM is the up gradable type of computer memory that can be accessed easily. It is named as Random access memory because any byte can be accessed without touching the preceding byte. SAM or Serial Access Memory is the opposite type in which the memory is arranged in a series of memory cells that can accessed only in a sequential way. RAM is an essential part of computer and Printers. RAM can be classified into DRAM and SRAM. DRAM or Dynamic Random Access Memory which needs to be refreshed thousands of times per second. SRAM or Static Random Access Memory is faster than DRAM so that refreshing in not necessary. More over the SRAM gives the access time as low as 10 nano seconds compared to the 60 nano seconds of DRAM. But due to the high cost of SRAM, DRAM is commonly used in computers. RAM has volatile memory which will wipe off when the power is switched off. Virtual memory is the method of extending the RAM capacity with a part of the Hard drive and Shadow RAM is another kind of RAM in which the contents of the ROM is copied to read-write memory to reduce the access time. RAM disk is the partitioned region of the physical RAM that can act as a faster Hard disk.

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Flash Memory


Today Flash memory is everywhere in Pen drives, Digital camera, MP3 players and in almost all portable electronic devices. Flash memory is a Non volatile Erasable memory device that can be reprogrammed. Dr.Fujio Masuoka of Toshiba introduced the Flash memory in 1984 to the world.


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Secure Digital Card


Secure Digital (SD) cards are flash memory cards developed for use in portable devices such as digital cameras, Mobile phones , PDAs and GPS systems etc.

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Multimedia Card (MMC)


It is the Flash memory card introduced in 1997 by Siemens AG and SanDisk based on the NAND based flash memory of Toshiba. It is small in size than the older Compact flash and has a size of 24mmx32mmx1.4mm just like a post stamp. Newer versions of MMC allow transfer of 4 or 8 bits at a time. MMC can be used in most of the systems that support SD cards.

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Multimedia Card (MMC)


It is the Flash memory card introduced in 1997 by Siemens AG and SanDisk based on the NAND based flash memory of Toshiba. It is small in size than the older Compact flash and has a size of 24mmx32mmx1.4mm just like a post stamp. Newer versions of MMC allow transfer of 4 or 8 bits at a time. MMC can be used in most of the systems that support SD cards.

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