Objective of this presentation is tell people about flash memory and fix information
-What if flash memory
-How does it works
-Why it is popular
Flash memory, also known as flash storage, is a type of
nonvolatile memory that erases data in units called
blocks and rewrites data at the byte level. Flash
memory is widely used for storage and data transfer in
consumer devices, enterprise systems and industrial
applications. Flash memory retains data for an
extended period of time, regardless of whether a flashequipped device is powered on or off.
Flash memory is used in enterprise data center server,
storage and networking technology, as well as in a wide
range of consumer devices, including USB flash drives -also known as memory sticks -- SD cards, mobile
phones, digital cameras, tablet computers and PC cards
in notebook computers and embedded controllers. For
instance, NAND flash-based solid-state drives are often
used to accelerate the performance of I/O-intensive
applications. NOR flash memory is often used to hold
control code, such as the basic input/output system
(BIOS), in a PC.
The Flash memory was invented by Dr. Fujio Masuoka
while working for Toshiba in 1984. According to
Toshiba, the name 'Flash' was suggested by Dr.
Masuoka's colleague, Mr. Shoji Ariizumi, because the
erasure process of the memory contents reminded him
of a flash of a camera. Dr. Masuoka presented the
invention at the IEEE 1984 Integrated Electronics
Devices Meeting held in San Jose, California. Intel saw
the massive potential of the invention and introduced
the first commercial NOR type flash chip in 1988.
Dr. Fujio Masuoka
How does flash memory work?
Flash memory architecture includes a memory array
stacked with a large number of flash cells. A basic flash
memory cell consists of a storage transistor with a
control gate and a floating gate, which is insulated from
the rest of the transistor by a thin dielectric material or
oxide layer. The floating gate stores the electrical
charge and controls the flow of the electrical current.
Electrons are added to or removed from the floating
gate to change the storage transistor's threshold
voltage. Changing the voltage affects whether a cell is
programmed as a zero or a one.
Why it is popular?
It saves data when power is OFF. It is non-volatile and
hence preserve state without any power.
Large and increased capacity
High transferring speed, hence it has faster read and
write compare to traditional hard disk drives.
Small size, portability
Low power consumption than traditional hard disk
Work more quietly than physical hard drive Less prone
Cheaper compare to traditional drives in small storage
It does not have any moving parts larger than electrons.