RAM (Random Access Memory)
The read and write memory of the computer is called computer memory. In this, the user can read as well as write information. After specifying the address of any place in RAM, that location can be accessed. RAM is considered "Random Access" because with this we can directly access any memory cell if we know the address of that memory cell. Storage cells, which are made up of many transistors, can store data inside.
There are two types of RAM:-
Dynamic RAM (DRAM)
Static RAM (SRAM)
SRAM differs from DRAM in that it is refreshed from time to time. SRAM is faster than DRAM and the cost of SRAM is also higher. SRAM is generally used for CPU cache and DRAM is used for main memory of the computer.
Some other types of RAM are:
EDO (Extended Data Output) RAM: Any memory location in EDO RAMs can be accessed. It stores 256 information bytes in latches.
SDRAM (Synchronous DRAMs): These RAM chips use the same clock rate as the CPU. DDR-SDRAM (Double Data Rate- SDRAM): This RAM transfers data on both sides of the clock.
ROM (READ ONLY MEMORY)
It is non-volatile memory, it stores information and data even after the power goes off. It is used for permanent storage of information. Information stored on ROM cannot be changed. Whatever is stored in this memory is fixed forever, that is, it cannot be changed.
Types Of ROM:-
PROM (Programmable Read Only Memory): Its content is decided by the user. Users can store permanent programs. The data is sent to it using PROM programs.
EPROM (Erasable PROM): The information stored on the EPROM can be erased by exposing it to UV rays for 15 minutes. It is not possible to delete any part of the stored information through this process, but only the entire content can be deleted. EPROM is cheap and reliable.
Flash Memory: This memory is a permanent type of memory that can be erased and programmable by an electrical effect. This memory uses a transistor memory, which results in the memory having the highest packing density, low power consumption, low cost and high reliability. It is used in digital camera, MP3 player.
