RAM (Random access memory) is a volatile memory, means when the power of a computer goes off, then all the contents in ram get vanished.
In the RAM, the memory cells accessed by transferring the information from any random locations. That is, the process of locating a word in memory is the same and requires an equal amount of memory, that’s why the name is “random access”.
communication between RAM and its environment possible through the data input and output lines, address selection lines, control lines which specify the direction of transfer.
Types of RAM
RAM in a computer can be two types:-
- Dynamic random access memory
- Static random access memory
Dynamic Ram consists of a transistor and a capacitor. The capacitor is capable of storing an electric charge.
It fully depends on the switching action of the transistor that capacitor either contains charge (1bit) or does not hold a charge (1bit).
It usually provides volatile storage which means its content is going to vanish in the event of power failure.
The amount of time taken to produce data required from memory, from the start of access until the availability of data known as memory access time.
Nowadays dram chip accessing time range:- below 7 to 70 nanosecond.
DRAM storage density:-
Consists of only one transistor and capacitor Per bit.
It allows a Dram Chip to pack large number of cells within the cheap in compared to the SRAM.
Basically, the chips are available in 128 bit or 256-bit densities or even more.
There is a problem in the capacitor because it starts losing the charge over a period of time.
It can only retain its data for thousand of a second.
Read attempt also drains out the charges and Due to this reason then memory controller needs to refresh its contents (a thousand times per second) which known as a memory refreshing.
The refreshing operation consumes precious processor time add each refresh Cycle take several CPU cycles to complete.
Static (SRAM) :
static RAM is also volatile but as long as they supplied with the power, they don’t need any special Regenerate circuit to retain it’s stored data.
It is basically consist of internal flip flops which store the binary information.
The Stored data is remain valid as long as power applied to the unit.
Static take more space than the dynamic .
Static RAM used in the specialized application and dynamic Ram used as a primary storage section of computer and smartphones.
It is easier to use and has shorter read and write cycle compared the dynamic.
What is RAM in a computer?
RAM means Random access memory which is a volatile memory. when the computer shutdown or goes off, all the contents in ram get vanished and it cannot be reverted.
What is RAM used for ?
Ram is used in devices to run the application or program. It does all the operation in the devices.
Such as laptop, smartphones, pc etc.
What is RAM and how it works?
As we know that ram is a volatile memory. In the RAM, memory cells accessed by the transfer of information from any random locations. That process of locating a word in memory is the same and it requires an equal amount of memory, so that’s why it is known as “random access”.
Different types of RAM?
There are two types of RAM
1.Dynamic random access memory:- it consists of a transistor and a capacitor and the capacitor has ability to store an electric charge.
2.Static random access memory:- it is also volatile but as long as it supplied with the power, SRAM don’t need any special Regenerate circuit to retain it’s stored data.