COMPUTER ARCHITECTURE
MEMORY SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PROM
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EPROM
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Flash
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EEPROM
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Detailed explanation-1: -EPROM (erasable programmable read-only memory) is memory that does not lose its data when the power supply is cut off. The data can be erased and the chip reprogrammed by shining an intense ultraviolet (UV) light through a window designed into the memory chip.
Detailed explanation-2: -EPROM is a nonvolatile kind of memory. If ultraviolet rays are exposing (Mercury –vapor light) to the EPROM chip, then this chip will release stored charge. The stored content in that EPROM chip will be lost or erased.
Detailed explanation-3: -Once programmed, an EPROM can be erased by exposing it to a strong ultraviolet light source (such as from a mercury-vapour lamp).
Detailed explanation-4: -EPROMs are erased with ultraviolet light. The capabilities of EPROMs were extended with EEPROM (electrically erasable programmable read-only memory); flash memory, which is extensively used in computers in the early 21st century, is an EEPROM.