Caple C871i Manual do Utilizador Página 166

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Apple II Computer Info
and can be erased in 64KB blocks and are rewritten one byte at a time needing
only 5v supply (the 1Mb parts we had before this needed 12v to program).
The MC68HC12A4 has internal 16 bit wide EEPROM which can be erased either by
the byte, aligned word, aligned row (32 bytes) or bulk (4KB) but can only
be written by the byte or aligned word.
Based on that, Flash seems less flexible than EEPROM. Having to erase 64KB
to rewrite a sector would prevent its use as a standard disk but would still
be useful for a read mostly disk.
EEPROM is typically good for 10,000 erase/write cycles while flash is 100,000
erase/write cycles (based on a sample of two datasheets).
--
David Wilson School of IT & CS, Uni of Wollongong, Australia [email protected]
###################################################### E N D O F F I L E
### flash.eeprom
###################################################### E N D O F F I L E
Apple II Computer Technical Information : Apple II Family Hardware Info
ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 166 of 572
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