Question

write the three types of ROM ? also mention their full form.

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Answer 1

Answer:

Three types of ROM are ;

1. PROM (Programmable read-only memory) – It can be programmed by user. Once programmed, the data and instructions in it cannot be changed.

2. EPROM (Erasable Programmable read only memory) – It can be reprogrammed. To erase data from it, expose it to ultra violet light. To reprogram it, erase all the previous data.

3. EEPROM (Electrically erasable programmable read only memory) – The data can be erased by applying electric field, no need of ultra violet light. We can erase only portions of the chip.

Answer 2

Answer:PROM-programmable read-only memory

EPROM-erasable programmable read-only memory

EEPROM-electrically erasable programmable read-only memory