| podobné slovo | definícia |
erasable programmable read-only memory
(encz) | erasable programmable read-only memory,mazatelné programovatelná paměť
pouze pro čtení n: EPROM Petr Menšík |
erasable programmable read-only memory
(wn) | erasable programmable read-only memory
n 1: (computer science) a read-only memory chip that can be
erased by ultraviolet light and programmed again with new
data [syn: erasable programmable read-only memory,
EPROM] |
electrically alterable programmable read-only memory
(foldoc) | Electrically Alterable Programmable Read-Only Memory
EAPROM
(EAPROM) A PROM whose contents can be changed.
[What's the difference between EAPROM and EEPROM?]
(1995-11-12)
|
electrically erasable programmable read-only memory
(foldoc) | Electrically Erasable Programmable Read-Only Memory
(EEPROM) A non-volatile storage device using a
technique similar to the floating gates in EPROMs but with
the capability to discharge the floating gate electrically.
Usually bytes or words can be erased and reprogrammed
individually during system operation.
In contrast to RAM, writing takes much longer than reading
and EEPROM is more expensive and less dense than RAM. It is
appropriate for storing small amounts of data which is changed
infrequently, e.g. the hardware configuration of an Acorn
Archimedes.
[Difference from EAPROM?]
(1995-04-22)
|
erasable programmable read-only memory
(foldoc) | Erasable Programmable Read-Only Memory
EPROM
(EPROM) A type of storage device in which the data
is determined by electrical charge stored in an isolated
("floating") MOS transistor gate. The isolation is good
enough to retain the charge almost indefinitely (more than ten
years) without an external power supply. The EPROM is
programmed by "injecting" charge into the floating gate, using
a technique based on the tunnel effect. This requires higher
voltage than in normal operation (usually 12V - 25V). The
floating gate can be discharged by applying ultraviolet light
to the chip's surface through a quartz window in the package,
erasing the memory contents and allowing the chip to be
reprogrammed.
(1995-04-22)
|
flash erasable programmable read-only memory
(foldoc) | Flash Erasable Programmable Read-Only Memory
FEPROM
Flash EPROM
Flash ROM
(FEPROM, "flash memory") A kind of {non-volatile
storage} device similar to EEPROM, but where erasing can
only be done in blocks or the entire chip.
In 1995 this relatively new technology started to replace
EPROMs because reprogramming could be done with the chip
installed. At that time FEPROMs could be rewritten about 1000
times.
Like EAPROM and ferro-magnetic material, FEPROMs rely on {FN
tunnelling}. Some flash memory supports block erase.
(1995-04-22)
|
one time programmable read-only memory
(foldoc) | One Time Programmable Read-Only Memory
OTPROM
(OTPROM, EPROM OTP) A kind of storage device like an
EPROM but with no quartz glass window in the package for
erasing the contents. This reduces the packaging cost but
means the device cannot be erased with UV and so can only be
written once. Erasure is possible, but expensive, with
X-rays.
(1995-04-22)
|