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Ans. Read Only Memory (ROM):
Another important part of main memory is Read Only Memory (ROM). Instructions can only be read from ROM. Instructions once written on ROM chip cannot be changed. It is a permanent or non-volatile memory of a computer, i.e. the contents of this type of memory are not lost when the computer is turned off. As soon as the computer is turned on, a program that resides in ROM automatically makes the computer ready for use. ROM is a semiconductor memory generally programmed by the manufacturer.
Difference between PROM and EPROM:
(Programmable Read Only Memory):
It is a non-permanent memory of a computer. It is programmeable read only memory.
EPROM (Erasable and programmable Read Only Memory):
It is a non-permanent memory of a computer. It is programmeable and erase able read only memory.
What else can I help you with?
What are the 2 main types of ROM called?
PROM (programable read only memory) EPROM (eraseable programable read only memory) PROM (programable read only memory) EPROM (eraseable programable read only memory) PROM (programable read only memory) EPROM (eraseable programable read only memory) PROM (programable read only memory) EPROM (eraseable programable read only memory) PROM (programable read only memory) EPROM (eraseable programable read only memory) PROM (programable read only memory) EPROM (eraseable programable read only memory)
What are the kind of ROM?
ROM can be broadly of three types, namely PROM (programmable read only memory), EPROM (erasable PROM), and EEPROM (electrically EPROM). Many versions of EEPROMs are available.
Why eeprom is better than eprom?
The advantages were "accumulative", so a history of the development of ROM is best to explain them: First came ROM - Read-Only Memory. Unlike RAM, ROM could not be written to but had the advantage that it was non-volatile which means its contents are permanently there, they do not disappear when power is removed. But the contents were put there in the factory, you could not "program" the contents yourself. Then came PROM - Programmable ROM. With PROM you could, if you owned a programming machine or "programmer", set the contents of the PROM yourself, one time, before your put it in the electronic circuit board. Next came EPROM - Eraseable PROM - with EPROM if you needed too you could take the EPROM out of the circuit board, put it in an EPROM eraser to reset the contents, and then program it again in the programmer. The EPROM eraser was a small box that the EPROM was placed inside. When the box was turned on ultra-violet light shined into the EPROM thorough a small "window" on the top of each EPROM, erasing the contents. Finally came EEPROM or E2PROM - Electronically Erasable PROM. With EEPROM you didn't need the eraser or the programmer! The EEPROM can be programmed, again and again while it is on the circuit board, by sending a sequence of signals to certain pins on the device.
What are examples of primary memory?
examples of primary memory are RAM, ROM, PROM, EPROM , etc.....
What is ROM eprom eeprom ram?
Here ya go found this on the Internet for you: Acronym for erasable programmable read-only memory, and pronounced ee-prom, EPROM is a special type of memory that retains its contents until it is exposed to ultraviolet light. The ultraviolet light clears its contents, making it possible to reprogram the memory. To write to and erase an EPROM, you need a special device called a PROMprogrammer or PROM burner. An EPROM differs from a PROM in that a PROM can be written to only once and cannot be erased. EPROMs are used widely in personal computers because they enable the manufacturer to change the contents of the PROM before the computer is actually shipped. This means that bugs can be removed and new versions installed shortly before delivery.
What is the explanation for the four types of ROM?
ROM- read only memory.. types are masked rom, prom, eprom and eeprom.
How can be erase data stored in ROM?
A standard ROM or PROM cannot be erased, only erasable PROM can be erased. It is done with either UV light or electronically depending on the type of EPROM.
What is the classification of ROMs?
Rom :- Read Only Memory. The storage of data and instructions in Rom is permanent. It does not depend on the power supply. The memory which does not lose its content when power is turned off is known as non-volatile memory. There are three types of Rom :- Prom = Programmable read only memory Eprom= Erasable Prom EEprom=Electrically erasable prom
What is the difference between PROM and EPROM?
EPROM (Electronic Programmable Read Only Memory) chips can be erased if it needs to be updated or fixed. It can be erased electronically only These are comparatively expensive than PROMs. PROM (Programmable Read Only Memory) chips are relatively once written and to rewrite them you need to replace entire data on it. These are relatively less costly. PROM is the Programmable ROM that allows the user to store data. an instrument called a PROM programmer does the storing by 'burning in', once the data has been burned, the data cannot be erased! On the other hand, an EPROM allows the data to be erased by the help of uv lights. i.e EPROM is uv light erasable and electrically reprogrammable.
A ROM chip that can be programmed over and over using ultraviolet is known as what?
EPROM or Erasable Programmable Read Only Memory was invented by Engr. Dov Frohman. It is a ROM-type chip that can hold data from 10-20 years. It is different from PROM because it can be programmed more than once. An EPROM programming is erased only through exposure to ultra violet light. The EPROM is configured or reconfigured using an EPROM programmer.
Can ROM be erased or added to?
No. However there are forms of ROM that can be changed, like Programmable Read Only Memory (PROM) and Erasable Programmable Read Only Memory (EPROM).
The PROM chips can be programmed only once?
Yes, PROM (Programmable Read-Only Memory) chips can only be programmed once. After the initial programming, the data stored in these chips is permanent and cannot be altered or erased. This characteristic makes PROM suitable for applications where the data does not need to change over time. However, for applications requiring reprogrammable memory, other types like EPROM or EEPROM are used instead.
