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How do mains powered devices retain their settings when powered off

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Comments

  • AndyPix
    AndyPix Posts: 4,847 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    Modern motherboards do not use "watch batteries" but rather high capacity capacitors for the cmos memory.

    Routers and the like use EPROM chips (like flash memory - Erasable Programmable Read only Memory)

    The bits are in solid state so no, they will never "run out"

    Andy
  • Fightsback
    Fightsback Posts: 2,504 Forumite
    AndyPix wrote: »
    Modern motherboards do not use "watch batteries" but rather high capacity capacitors for the cmos memory.

    Routers and the like use EPROM chips (like flash memory - Erasable Programmable Read only Memory)

    The bits are in solid state so no, they will never "run out"

    Andy

    Andy, think you mean EEPROM (Electrically Erasable Programmable Read only Memory) you erase an EPROM using UV.
    Science isn't exact, it's only confidence within limits.
  • AndyPix
    AndyPix Posts: 4,847 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    ^^ Yes I do .. No coffee yet ;) thanks
  • Fightsback
    Fightsback Posts: 2,504 Forumite
    AndyPix wrote: »
    ^^ Yes I do .. No coffee yet ;) thanks

    While you're there, white with one sugar please ;)
    Science isn't exact, it's only confidence within limits.
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