USB FLASH

DRIVER

By RAHMAD & HAFIZ

BA

SIC

FA

CT

A USB flash drive is a data storage device

flash memory with an integrated Universal Serial Bus (USB) interface.

USB flash drives are often used for the same purposes for which floppy disks or CD-ROMs

Removable,rewritable,smaller,faster,more capacity,durable.

Supported by OS.

Can read by many system.

PRINCIPAL

Crystal oscillator – produces the device's main 12 MHz clock signal and controls the device's data output through a phase-locked loop.

USB mass storage controller – a small microcontroller with a small amount of on-chip ROM and RAM

HIS

TO

RY

PATENT CONTOVERSY-invented by Amir

Ban, Dov Moran and Oron Ogdan (M-SYSTEMS) –april

1999 IBM & M-SYSTEM Shimon Shmueli-

September 1999 Competing claims have been

made by Singaporean company

Trek Technology and Chinese

company Netac Technology

most companies that manufacture

USB flash drives do so without

regard for Trek and Netac's

patents. Trek Technology(ThumbDrive) and

IBM(DiskOnKey) began selling the

first USB flash drives commercially

in 2000

Power RatingType USB 2.0 flash drives USB 3.0 flash drives

Speed 480 Mbps (Megabits per second)

4.8 Gbps (Giga bits per second) 10 times faster than USB 2.0

Power consumption

Read [W] Write [W] Read [W] Write [W]

0.22 0.38 0.07 0.08

Energy Efficiency Energy efficiency (P) is defined as amount of work per joule. Work

depends from the actual workload

It can also be considered as sustained throughput of a device per watt

USB 2.0 flash drives

USB 3.0 flash drives

Performance per Joule [Mb/J]

57.6 150.0

Efficiency 70 % 90 %