A computer system is a collection of hardware and software components designed to provide an effective tool for computation. Computer system are used in every walk of life to assist us in the various tasks we perform. The wide availability of the internet has enhance the use of computer for information sharing and communication. Computer system allows us to store, process, display and communicate information. In any modern computer system even a simple one, in general needs several different programs in order to accomplish its various functions.

Saturday, August 6, 2022

RAM architecture

In random-access memory (RAM) the memory cells can be accessed for information transfer from any desired random location. That is, the process of locating a word in memory is the same and requires an equal amount of time no matter where the cells are located physically in memory.

Due to RAM architecture, the memory cells can be accessed for information from anywhere on the computer system.

This communication between different peripherals and RAM is achieved by data input and output lines, control lines which specify the direction of transfer, and address selection lines.

The n data input lines deliver the all information which are hold in the memory, and n data output lines transfer the information that is come out of specific word selected among the 2k available. inside the memory.

Types of RAM
*SRAM (Static Random Access Memory) - is made up of four to six transistors. The word static indicates that the memory retains its contents as long as power is being supplied unlike DRAM, which has to be refreshed periodically.
*DRAM (Dynamic Random Access Memory) - is widely used as a computer’s main memory. Each DRAM memory cell is made up of a transistor and a capacitor within an integrated circuit, and a data bit is stored in the capacitor. DRAM must be continually refreshed in order to maintain the data. This is done by placing the memory on a refresh circuit that rewrites the data several hundred times per second.
*VRAM (Video Random Access Memory)
RAM architecture

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