Erasable Programmable Read-Only Memory


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erasable programmable read-only memory

[i¦rās·ə·bəl prō¦gram·ə·bəl ¦rēd ‚ōn·lē ′mem·rē]
(computer science)
A read-only memory in which stored data can be erased by ultraviolet light or other means and reprogrammed bit by bit with appropriate voltage pulses. Abbreviated EPROM.

Erasable Programmable Read-Only Memory

(storage)
(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.
References in periodicals archive ?
If a HMMWV with a newly installed transmission goes into "limp mode" (won't shift out of second gear right away, it could have the wrong erasable programmable read-only memory (EPROM) chip installed.
Existing owners of C4 controllers may obtain the firmware upgrade free of charge by supplying an appropriate electronically erasable programmable read-only memory (EEPROM) device to hold the firmware and paying the return postage or, for a $50 charge and a C4 serial number, a new EEPROM with the firmware installed may be obtained.
In 1968, he co-founded Intel Corp., producer of the first commercial dynamic random-access memory, the first microprocessor, and the first erasable programmable read-only memory. Today, Intel, of Santa Clara, CA, is the largest semiconductor manufacturer in the world.