Le 22.04.2009 12:37, Invisible nous fit lire :
> The Holtek chips say "HT27C512-70" followed by a number that's unique to
> each chip. Apparently this part number is a "OTP CMOS 64K x 8-Bit EPROM".
> 
> http://pdf1.alldatasheet.com/datasheet-pdf/view/64437/HOLTEK/HT27C512.html
> 
> "The HT27C512 chip family is a low-power, 512K bit, +5V electrically
> one-time programmable (OTP) read-only memories (EPROM)."
> 
> Um, wouldn't that make it a PROM rather than an EPROM? The E is for
> *erasible*. :-P

it is erasable.
E from EPROM is erasable programmable (EP).
first E from EEPROM is electrically.
EPROM are erased with UV-light. EEPROM are erased electrically.
Now, if the packaging has no window (cheaper), the EPROM become a OTP EPROM...
a PROM is using fuse, so technically they are different.

But at the core, it's still an EPROM... that packaging does not allow to erase.
(how do you like your marketing text ?)

Post a reply to this message