Flash Memory

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Flash Memory

• Comparision of Information from Wikipedia and
  Google

NameSagas Elphas Kipkemboi Cap06sTeacher
Jaana Holvikivi
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TABLE OF CONTENTS

• History
• Description
• Application
• Limitations
• Conclusion
• References

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INFORMATION GOT FROM GOOGLE
HISTORY

• Evolved from EEPROM
• Got the name from Toshipa to show how it can be
  erased faster
• Constructed either NOR or NAND gates
• Toshiba developed NAND in 1989
• Intel developed NOR IN 1988

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DESCRIPTION

• Rewritable memory chip
• Can hold its contents without power
• Smaller in size
• Lighter in weight
• Has no movable parts
• Available in various capacity

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ITS APPLICATION

• BIOS chip in computers
• Compact Flash i.e in digital cameras
• SmartMedia
• Memory Stick
• PCMCIA Type I and Type II memory cards (used as
  solid-state disks in laptops)
• Memory cards for video game

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ITS LIMITATION

• More volatile for example when a computer is
  repeatedly booted up using one.

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ACCORDING TO WIKIPEDIA
HISTORY

• Invented by Dr. Fujio Masuoka in 1984
• It was first presented at IEEE 1984
• Introduced asNAND flash at ISSCC in 1989 by
  Toshiba
• Introduced as the first commercial NOR type flash
  chip in 1988 by intel

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ITS DESCRIPTION

• Its a non-volatile Computer memory
• Need no power to maintain its data
• can be electrically erased and reprogrammed
• It is easy to access and read data
• Cannot be deatroyed by ordinary physical means
• Its cheap,less than EEPROM

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ITS APPLICATION

• Used in digital cameras
• Used in mobile phones
• Used in USB flash drives
• Used in laptops
• MP3 players

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LIMITATION

• Must be erased a block at a time
• It has finite number of erase-write cycles
  compared to hard disk drive
• Cost per byte is higher than the corresponding
  cost of a hard disk drive

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CONSLUSION

• There is inconsistency of information over the
  origin of the name Flash
• In both wikipedia and google the information is
  more of advertising than academic
• using more than one browzer to get information
  makes our search much better
• Wikipedia compared to google is better because it
  is devoted to explain than advertise

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REFERENCES

• www.google.com
• www.wikipedia.com