Re: [ProgSoc] SONY Digital Cam Memory Stik

[Murray Grant <ligos@nospam.progsoc.uts.edu.au>]

> > > PIC chips use flash memory and you can erase and rewrite single
> > > memory locations. They are supposed to give up after 1000 writes
> > > whether that be single location or block.
> > 
> > Are you sure that isn't refering to some onboard EEPROM? Flash memory that
> > is byte or word eraseable is often called EEPROM, even if it technically
> > is flash.
> 
> I'm not aware of any actual structural differences between EEPROM
> and flash memory other than the name. My understanding is that they
> are all based on a `floating gate' same as normal EPROM but rather than
> use UV light to make the floating gate lose its charge, they depend
> on a large electric field caused by a local high voltage element.

Too true. I remember an article in Silicon Chip from a while back where
the writer's difference between flash and EEPROM was "flash is block or
chip erasable and EEPROM is byte or word erasable" (paraphrase). So any
difference really is a moot point. I was just wondering if you ment any on
board EEPROM on the PIC (again not a very relivant point). I know some
AVRs have onboard EEPROM, but my dad hasn't had as much dealings with PICs
(he loaths them actually ;-)).

None of this will help retreive photos from memory sticks though ;-)


Murray Grant
Progsoc Computer Systems Officer
cso@nospam.progsoc.uts.edu.au


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