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RAM
RAM
This kind of memory is used for temporary storage of data. Data may be written into it at any time, and later read from it.
The data is lost when the power supply is switched off. Used for the storage of the data and for programs copied from more permanent data stores such as magnetic disks.
Random Access means that data can be read from or written to any location at any time. RAM occupies most of the available address space in a typical micro computer. A PC when purchased may be equipped with 32 MB of RAM, with room for expansion to 64 MB or more.
There is usually less need of RAM in micro controller systems as the programs are permanent and are stored in the ROM itself. FLASH memory is a more popular alternative to ROM these days.
Whenever data is read from RAM, it is copied to a register of the CPU. Conversely, it is copied from the CPU when it is written into RAM. In other words the original data remains unaltered after copying. This is known as non destructive readout.
Once data is stored in RAM, it remains there unless it is either
1: Overwritten and replaced by new data,
2: The power is switched off.
The types of RAM that exist are:
The physical types of ram include:
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RAM
RAM
This kind of memory is used for temporary storage of data. Data may be written into it at any time, and later read from it.
The data is lost when the power supply is switched off. Used for the storage of the data and for programs copied from more permanent data stores such as magnetic disks.
Random Access means that data can be read from or written to any location at any time. RAM occupies most of the available address space in a typical micro computer. A PC when purchased may be equipped with 32 MB of RAM, with room for expansion to 64 MB or more.
There is usually less need of RAM in micro controller systems as the programs are permanent and are stored in the ROM itself. FLASH memory is a more popular alternative to ROM these days.
Whenever data is read from RAM, it is copied to a register of the CPU. Conversely, it is copied from the CPU when it is written into RAM. In other words the original data remains unaltered after copying. This is known as non destructive readout.
Once data is stored in RAM, it remains there unless it is either
1: Overwritten and replaced by new data,
2: The power is switched off.
The types of RAM that exist are:
The physical types of ram include:
[Edit this page] [Page history] [What links here] [Discuss this topic] [Printer Friendly]
