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NonVolatile Memory

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A storage device whose contents are preserved when the system power is turned off. ... http://www.digikey.com. http://www.tigerdirect.com. Questions? ... – PowerPoint PPT presentation

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Title: NonVolatile Memory


1
Non-Volatile Memory
Tech Topic Presentation
  • Jeremy Searle
  • Feb. 4th, 2004

2
Definition
  • A storage device whose contents are preserved
    when the system power is turned off.
  • Examples Magnetic disks, magnetic tape, paper
    tape, punch cards, CD-ROMs, EEPROM, SRAM with
    batteries,

3
Report Focus
  • -Applicable to micro-controllers
  • -Single chip (28 pin DIP)
  • -Current technology
  • -Three types NV-SRAM, EEPROM, Flash EEPROM

4
Battery Backed SRAM (NVSRAM)
  • What is it Static RAM that has a battery
    connected to it in order to keep the SRAM
    contents when system power is off
  • Uses Constantly changing/updating data that must
    be recorded
  • Common Uses Control system data acquisition
    cards/Computer cards, HP calculator memory, older
    video game cartridges

5
Battery Backed RAM
6
EEPROM
(Electrically Erasable Programmable Read Only
Memory)
  • What is it Read Only Memory that requires
    absolutely no power to save data. Similar to
    EPROM except it can be programmed electrically,
    without removal/UV exposure
  • Uses Storing small amounts of data which is NOT
    frequently changed
  • Common Uses voice recognition phone dialers,
    lighting controllers/mixers, newer video game
    cartridges

7
EEPROM
8
Flash Memory
  • What is it A type of EEPROM that erases a block
    of data or the chips entire contents at one
    time, resulting in faster writing times
  • Uses Storing small amounts of data which is NOT
    frequently changed
  • Common Uses Memory sticks for digital cameras,
    portable USB drives, 68HC08 memory

9
Flash Memory
10
Relative Speed/Prices
Note All prices are for 256 KB, 28 pin DIP,
Parallel interface
11
Sources
  • http//www.gamespy.com/articles/july03/25smartest/
    index9.shtml
  • http//www.logistica.com.au/product.cfm/ProductID/
    DCE935CB-6C0E-48F2-8E76-34DE339534E2
  • http//www.st.com/stonline/products/families/memor
    ies/nvram/nv_zp_wi.htm
  • http//www.sbs.com/products/467
  • http//www.umem.com/MM-5415CN.html
  • http//computer.howstuffworks.com/ram4.htm
  • http//www.hyperdictionary.com/dictionary/non-vola
    tilestorage
  • http//hardwarecentral.dealtime.com/xDN-Musical_In
    struments-EEPROMCR-010DW-0
  • http//store.yahoo.com/safemart/noname8.html
  • http//computer.howstuffworks.com/flash-memory.htm
  • http//www.digikey.com
  • http//www.tigerdirect.com

12
Questions?
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