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TOPIC 3.3: FLASH MEMORY STORAGE - Coggle Diagram
TOPIC 3.3: FLASH MEMORY
STORAGE
Descriptions
Non-volatile memory chip used for storage and for transfering data between a personal computer (PC) and digital devices
able to be electronically reprogrammed and erased
often found in USB flash drives, MP3 players, digital cameras and solid-state drives
Flash-based gadgets
a. This wireless LAN card allows laptop and PDA users to access the Internet from any Wi-Fi access point.
b. This flash-based player provides everything you need to play music and store data on the go. It also comes with a built-in FM radio and voice recorder.
c. It looks like an ordinary watch, but this USB drive from Edge Tech can store up to 1 GB of flash memory. It will let you save and transfer your photos, songs and data files easily.
d. This flash memory card is used as 'digital film' to store images on a digital camera.
e. This hand console lets you play games stored on ROM game cards, which have a small amount of flash memory to save user data, for example high scores.
f. This USB flash pen drive.
Main Components of USB
Flash Drive
Standard USB plug. This provides connects the flash drive to a device.
USB mass storage controller. This is a microcontroller for the USB. It has a small amount of RAM and ROM.
NAND flash memory chip. The data is stored in this component.
Crystal oscillator. The data output is controlled by this component.
Express Card
An ExpressCard module is a removable device that fits in an ExpressCard slot.
Developed by the PCMCIA.
Commonly used in notebook computers.
Solid State Drive (SSD)
Flash memory chips are a type of solid state media and contain no moving parts.
Advantages
Faster access time
Faster transfer rate
Generate less heat and consume less power
Last longer
Different between HDD and SSD
Hard Disk Drive (HDD)
no moving parts
fast
small
cheaper
larger storage
Solid State Drive (SSD)
flash storage and no moving parts
much faster
more smaller, less space - physically
expensive and less storage
Pros and Cons of
Flash Memory
Pros
Faster read and write compared to traditional hard disk drives.
Smaller size.
Less prone to damage.
Cheaper than traditional drives in small storage capacities.
Uses less power than traditional hard disk drives.
Cons
Flash memory cells have a limited number of write and erase cycles before falling.
Most flash drives do not have a write-protection mechanism.
Smaller size devices, such as flash drives make them easier to lose.
Currently costs a lot more per GB than traditional hard drives for larger storage capacities.
May require a special version of a program to run on a flash-based drive to protect from prematurely wearing out the drive.