What is an EPROM
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The term EPROM stands for “E”rasable “P”rogrammable “R”ead “O”nly “M”emory.Let’s examine each term. Erasable means that the chip can be erased and reused. An EPROM is erased in a device called an EPROM eraser. The eraser is a high intensity ultraviolet light source in a box. We will talk more about erasing eproms later. Programmable means that the EPROM can be programmed with a program, data or both. Read Only Memory means that the computer which is connected to the EPROM can only get information from the chip. It cannot put information into the chip; thus the term read only. In short, the EPROM is a memory part which will not forget its program or data when power is removed. It must be programmed by a special programming product called an EPROM or DEVICE programmer. Once the EPROM is programmed it cannot be changed until it is erased in an EPROM eraser and then reprogrammed in a programmer. The computer cannot store data in an EPROM because the EPROM is a READ ONLY memory part.