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Tuesday, 10 August 2010

FLASH MEMORY CARDS

Introduction to Flash Memory Card

Flash memory refers to a particular type of EEPROM, or electrically erasable programmable read only memory. It is a memory chip that maintains stored information without requiring a power source.
Flash memory is
Non volatile.
Considered as solid state storage devices.
Used more as hard drive.

Why Flash Memory Cards Popular?
Flash Ram storage devices are shock proof, dust proof, immune to magnetic fields and really small too. Flash Memory provides storage for today’s electronic devices such as iPods, PDA, digital cameras, CAMCORDERS utilize flash cards.
Important Methods in Flash Memory Working
TUNNELING
ERASING

Different Types of Flash Memory Cards
SMART MEDIA CARD
COMPACT FLASH
xD PICTURE CARD
SECURE DIGITAL or MULTIMEDIA CARD
MEMORY STICK

Smart Media Card
Better known as smart media
2MB to 128 MB
Developed By Toshiba
compact Flash
Developed by Sandisk
8MB to 6 GB
They are thicker
Utilize controller chip

Compactable flash card comes from 2 ways
Type I
Type II

Xd Picture Card
xD means “extreme digital”
Currently available from 64MB to 1GB
Found in Fuji and Olympus digital camera

SECURE DIGITAL or MULTIMEDIACARD
They designed to hold copyrighted musical content.
Small size.
Low power consumption.
16MB to 2GB.

mEMORY STICK
Shaped like a stick of gum
Smaller size
Storage capacity up to 128 MB
Ideal for mobile application

EXTERNAL CARD READERS
It is used to access digital cameras images very fast. These come in many varieties depending on the computer interface. Most common type are made for PCs and connected to the usb port.

Advantages of Flash Memory Cards
Power consumption.
Portability.
Capacity.
Durability.
Performance.
Reliability.
Plug-and –play.

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