Inside of a Pendrive

Pendrive is used to store data of  8/16/32/64gb or more..It uses a flash memory to store data.it is usually plugged in to USB port.It is rewritable.The advantage is that it does not require drivers.it is plug and play.
pendrive are 2 types. supports usb 2.0 and 3.0.
theoretically  transfer rate of usb 2.0 is   60MB/s and usb 3.0 is 625MB/s.All USB 3.0 devices are backward compatible with USB 2.0 ports.But practically read and write speeds are very low due to limitations of their memory controllers.

Some parts of pendrive are
 1.USB Connector
2.USB Microcontroller
3. Optional Jumper (To change configuration in future or across different models)
4.Flash memory chip (NAND)
5. Crystal oscillator for microcontroller
6. Status LED (optional)
7. Lock/Unlock switch
8. Second Flash (Optional)
 Descriptions.
1. Standard USB conector – provides a physical interface to the host computer
2. Microcontroller – a small microcontroller with a small amount of on-chip ROM and RAM. It controls the flow of data.
3.NAND flash memory chip(s) – stores data(NAND flash)
4.Crystal oscillator – produces the device's main 12 MHz clock signal and controls the device's data output    through a phase-locked loop.
 5.LEDs – indicate data transfers or data reads and writes.
6.Write-protect switches – Enable or disable writing of data into memory.

Famous manufactures are
  HP
Sandisk
Transcend
Moserbaer
PNY
Kingston
Strontium
Verbatim
Sony
Adata
EMTEC
iBall
Amkette
Toshiba
Trek
Corsair

  

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Article is exclusively by,

Harsha Krishna K

hkk007@engineer.com