What is ROM - Computer world

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Sunday, August 25, 2019

What is ROM




WHAT IS COMPUTER ROM
It’s logical then that data stored on READ ONLY MEMORY (ROM) cannot be change, as its name implies. It is Non-Volatile Memory. That is, its data can only be read. New data cannot be added to it. Because of it given to written by Manufactures by once. Instructions related to Computer Functionality are stored in ROM. Which is includes turning on the computer. This is called 'Booting'. Apart from computers, Washing Machines, Microwave Ovens and other electronic devices are also programmed by ROM. That mine store data is available in it forever. Data is not deleted even when power is off. These are also the primary memory of the computer.
FEATURES OF  R.O.M
ROMs are permanent memory. The instructions of Basic Functionality remain store.
They are readable only. They are cheaper than RAM. The CPU is part of the memory.
TYPES OF ROM
MROM (MASK READ ONLY MEMORY)
PROM (PROGRAMMABLE READ ONLY MEMORY)
EPROM (ERASABLE PROGRAMMABLE READ ONLY MEMORY)
EEPROM (ELECTRONICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY)
PROM (PROGRAMMABLE READ ONLY MEMORY):-
The full name of PROM is Programmable Read Only Memory. Data is written once in this Memory Chip.
EPROM (ERASABLE PROGRAMMABLE READ ONLY MEMORY):-
Its full name is Erasable Programmable Read Only Memory. The data available in this ROM can also be erased. Ultra-Violet Light is used to erase data.
EEPROM (ELECTRONICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY)
The full name of EEPROM is Electrically Erasable Programmable Read Only Memory. Whose data can be erased by an Electrical Charged. It is slightly slower than other ROMs.
MROM (MASK READ ONLY MEMORY):-
The full name of MROM is Mask Read Only Memory. It is programmed within the device by the manufactures. MROMs are cheaper than other ROMs and provide the ability to store more data in less space. Meaning its data store density is high.



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