What is ROM and How Does ROM work? Types of ROM

What is ROM and RAM

ROM is a non-volatile memory. This means that it is a memory device or storage medium that stores information permanently.

The complete form of ROM is ” Read Only Memory “. I told you about this in the previous article computer is only part of Primary Memory. So a little more reminder that there are two types of memory in a computer, Primary and Secondary, Primary Memory are of two types.RAM and another ROM.

Its full name is Read-Only Memory by its name; you must be aware that we can read this memory. There is a fixed program in it (or may say Permanent Memory); we cannot change this program quickly, as the correct answer is when you buy a computer, there is already a BIOS program in it.

It helps to turn on the system, and with this, it allows the BOIS Computer and Operating System. Links.

So this BIOS already resides in the new computer, and the memory in which it resides in the name of the ROM and an example is the FIRMWARE Software program which attaches lives with hardware. And the program that is in Firmware also stays in a Rom Chip.

This memory is also called Non-Volatile Memory. This memory is created only when computers are built. ROMs are not just used in computers or mobiles; we can use them in some other electronic devices.

Such as WASHING Machine, Microwave Oven, TV, AC, Lift. So due to changing technology, ROMs also have different types. We will talk about this further in Types of ROM.

Characteristics of ROM

Let us now consider the features of ROM.
• ROM is a permanent memory or permanent memory.
• It stores all the basic Functionality instructions of the computer.
• ROMs are readable only. Meaning that only the information in it can be read.
• Talking about the price, ROMs are cheaper than RAM.
• ROM uses very little energy, while they are very reliable.

Types of ROM

Some Sabbaths in this article like Data, Instruction, Program all mean the same, do not be confused and have a term ” Programmed “. This means that there are very many commands that do a task as the software does.

In the same way, here on Computer, the work of doing Computer On is done by a software program called Firmware, which resides in ROM. By the way, there are four types of ROM which are given below, and their information is also there.

  1. MROM (Masked Read Only Memory)
  2. PROM (Programmable Read-Only Memory)
  3. EPROM (Erasable and Programmable Read-Only Memory)
  4. EEPROM (Electrically Erasable and Programmable Read-Only Memory)

1.Masked Read Only Memory

This is the first ROM; it is not used at all in today’s world. This is Read-Only Memory Hard Wired Devices. In which there was a lot of pre-programmed data and Instruction Store. Such memory used to be quite expensive. At that time, MROM will not be available anywhere.

2.Programmable Read-Only Memory

This is such a Read-Only Memory, which we can change only once. Changing on here means putting some new program in PROM, and an update to it is also said. Once updated, no one can update it again.

User Blank PROM is purchased and then the Instruction that wants to be inserted in it can be inserted (Instruction means there are some commands which do some work).

There are miniature fuses in this memory, in which Instruction is inserted through programming. Once it is programmed, you cannot erase it again.

3.Erasable and Programmable Read-Only Memory

There is another type of this ROM, its specialty is that we can also Erase it and be programmed again. The way to erase this memory is quite different, in which you pass this memory up to 40 Minute with Ultra Violet Light, then it is empty.

We know a little more in detail, ” EPROM Eraser ” is also used to achieve this work. While Programming (Programming means updating or inserting some new program) Charge has to be inserted in it, which is kept for more than ten years because there is no way to get out of the Charge. Therefore, it remains inside that memory.

So to erase this charge (instruction), Ultra Violet Light is passed through Quartz Crystal Window (lid). With the effect of this light, all Charge Erase is more. Here was some information about Erasable and Programmable ROM.

4.Electrically Erasable and Programmable Read-Only Memory

Due to the change of technology, Read-Only Memory also needed to be changed repeatedly; that is why this memory was used. Its speciality is that we can Erase and programmed it 10 thousand times and within just 4 to 10 Millisecond, we can also Erase and Programmed it.

We can select any location of memory in it, and we can Erase and Programmed the same. We do not need to empty the entire Chip. Because of this Advantage, it is an EEPROM pedestal but is slow.

So till now, you know what ROM is (what is ROM), and ROM types now know about its benefits.

How does ROM work?

Whenever we switch on the computer, there is not much difference between your computer and rock, which means both have the same computing power.

Therefore, there is something that should be inside your computer that should tell him that there is other hardware in it such as keyboard, mouse, disk drive सभी attached हैं.

This is generically called ” BIOS ” ( Basic Input Output System ). Even though your computer is not so bright, these BIOS chips in the computer help the computer all startup routines. In accessing, stored in a disk drive, they also use RAM for all types of computations.

These BIOS are stored on a ROM chip. Otherwise, the computer will know how to do it with other hardware associated.

Like RAM, ROM chips also have grids of columns and rows. But where these columns and rows intersect, they are fundamentally different in these ROM chips than RAM chips.

RAM uses transistors to turn a capacitor on or off to access it in an intersection, while ROM diode is used to connect these lines if they have a value of 1. The same if their value The lines are not related at all if they are 0.

For the ROM chip to function correctly, it is essential that its programming be completely perfect, and it is also crucial to have complete data with it when the chip is being created. This is because you cannot reprogram or rewrite a standard ROM chip again.

If something goes wrong or you have to update any data, you have to change the ROM or make a new one. So ROM Chip’s original creation of a template is challenging, while many trial and error are made.

Advantages Of ROM

So now you know, what are the benefits of ROM, then it would be understandable to understand all the above information.

  • Its nature is Non-Volatile , which keeps the program permanently.
  • Its data does not change automatically; only the data changes by changing it.
  • It is cheaper than RAM .
  • Are more reliable than RAM because the data remains in RAM as long as the power supply remains.
  • It is stable, and there is no need to refresh it again and again.
  • There is a lot of thinking and putting data in it, which we cannot change again and again.

This was some information about the Advantages of ROM

My final decision

So friends, today, what was ROM (What is ROM)? You must have felt very good; I hope you find this helpful information for you. If you are a student, then this information will be more beneficial for you. If you want to know about RAM, then you can also read my other article.

There are some terms in it, which would be smiling to understand if you are non-technical, but still, if you want to ask any question, please write in the comment box below and subscribe to our blog because we give knowledge in simple language. , India is to be made digital, Jai Hind, Dhanyabad.

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