Random Access Memory (RAM) is a famous memory storage form. Reading and writing (R / W) memory is called RAM. The user can write information on it and learn the information from it. After specifying your address at Ram or any place, limited time (and less) can be reached for the time being.
RAM is a disturbing memory, it means that information can only be found in it when the power is on. As soon as the power is broken, they can not reach. So it means a blank RAM memory archive. The RAM takes data and processing instructions for some time until the CPU is needed.
RAM is considered "random access" because you can access any mobile storage directly when you know the row and column associated with that cell. RAM is made with electronic chips made of semiconductor, such as analysis and many other types of chips. In the RAM, transistors make different cells that can "remember" the number of data, for example, 1 or 4 bits - unless the PC is replaced. Physically, in RAM, small computer letters are found (small circuit boards are printed). Modules placed on the motherboard of the PC using socket - these are usually 2, 3 or 4
Dynamic RAM: It loses its stored information in a very short time (with milliseconds). D-RAM is cheap and low.
Like the Microprocessor Chip Integrated Circuit (IC) created by millions of transponders and capacitors.
The most common form of computer memory, dynamic memory cell represents a data data. Capacitor takes small details - 0 or 1. Transistor acts as a switch that allows rotating control over the chip memory to read capacitors or to change their position. A capacitor is like a small bucket that can hold the electrons. To keep 1 on the cell phone, the bucket is full of electrons.
To save 0, it has been removed. The problem with capacitors bucket is that it can leak. In the case of a few millimeters, a whole bucket is empty. Therefore, for dynamic memory to work, the CPU or memory controller will have to reach and upload all the capacitors that remain before they are released. To do this, the memory controller reads the memory and writes directly. This performance update automatically occurs thousands of times per second.
There are some other RAMS
(A) Edo (Extended Data Output) RAM: In the EDO RAM, any memory location can be accessed. 256 bytes store data information in the latch. Latch holds 256 bytes of information so that in most programs, which are executed sequentially, data waiting is available without states.
(b) SDRAM (Synchronous DRAMS), SGRAMs (Synchronous Graphic RAM) These RAM chips use the clock rate just like the CPU. When the CPU is expected to be ready, they transfer data.
(c) DDR-SDRAM (Double Data Rate - SDRAM): This RAM transfers data on both sides of the clock. Therefore, the transfer rate of data is doubled.
ROM: Read only memory: its non-volatile memory, i.e., the information stored in it, is not lost even when the power supply is stopped. It is used for permanent storage of information. It also has a random access property. Information by user / programmer can not be written in the ROM. In other words, ROM is determined by the content manufacturers.
The following types of ROMs listed below:
(i) PROM: This is a programmable ROM. Its content is determined by the user. The user can store permanent programs, data etc. in a PROM. Data is fed into it using PROM program.
(ii) EPROM: An EPROM is a killable PROM. The stored data of EPROM can be erased by exposing it to UV light for approximately 20 minutes. Erasing it is not easy because EPROM IC has to be removed
Computer connection and UV light. All data has been removed and the user does not have selected parts. The EPROM is cheaper and reliable.
(iii) EEPROM (Electro-erosable PROM): The chip can be easily replaced by byte and switched by byte. It can be removed from a few milliseconds. EEPROM is limited to repeated reductions, e. It is usually about 10,000 times.
Flash Memory: This is the last type of electricity stored and configured. It uses all transistor memory due to high packages of packages, low power consumption, low cost and high reliability. Used in all power, digital camera, MP3 player etc.
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