Initially program storage using integrated circuits was just ROM — read-only memory, that was programmed as a mask at the factory. TECHNICAL BAJRANGI 66,979 views. The difference between a PROM and a ROM (read-only memory) is that a PROM is manufactured as blank memory, whereas a ROM is programmed during the manufacturing process. RAM computer memory available to the user for creating, loading, or running programs and for the temporary storage and manipulation of data, in which time of access to each item is independent of the storage sequence. The data on this non-volatile memory chip can be erased by exposing it to high intensity UV light. It’s memory is written just the once and programmed electrically by the user at the time or when the initial chip fabrication. PROM stands for Programmable Read Only Memory is the type of ROM is written only. DIFFERENCE. 1 Answers. EPROM is a type of ROM that can be erased by exposing it to ultra-violet light and can be reprogrammed. Nowadays everyone uses Flash, which you can erase and reprogram easily in-circuit, but it's slow. As opposed to RAM (random access memory), which nowadays is volatile (loses data with the power off), but used to be non-voltile (magnetic core memory). EPROM provides reduced storage permanency as compared to PROM as a result of the EPROM is receptive to radio ad electrical noise. EPROM stands for erasable programmable read-only memory, it is the type of ROM is read ad written optically. To write associate EPROM, its storage cells should stay within the same initial state. EPROM stands for erasable programmable read - only memory. To write associate EPROM, its storage cells should stay within the same initial state. So RAM and ROM are actually talking about different things. EPROM (Erasable Programmable Read Only Memory) is also the type of ROM is read and written optically. What Is The Difference Among,RAM,ROM,PROM,EPROM? RAM vs ROM : Difference between them along with their types - Duration: ... TYPES OF ROM AND THEIR DIFFERENCE EXPLAIN IN HINDI - PROM,EPROM,EEPROM - Duration: 4:01. look at my pict hhnoon answered . It was meant to fulfil the requirement of a group of ROMs which may contain a selected memory content. The process of programming a PROM is sometimes called burning the PROM. EPROM- Erasable programmable read only memory is a type of ROM which can be erased and reused. EEPROM- Electrically erasable programmable read only memory is a type of ROM which retains all the stored data even after the power is removed. EPROM provides reduced storage permanency as compared to PROM as a result of the EPROM is receptive to radiation and electrical noise. To write data onto a PROM chip, you need a special device called a PROM programmer or PROM burner. in the construction of EPROM, MOS transistors are used. ROM stands for read only memory. 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