MEMORY
The term "memory" applies to any electronic component capable of storing data.
Memory can be categorized in to two types
1. Internal memory
2. External memory
Internal memory
It is used to store the data temporary.
It uses micro conductors ,Ex. Electronic circuits.
Internal memory corresponds to random access memory.
External Memory
It is also called physical or auxiliary memory.
It is used to store the data permanently.
Examples of external memory are hard disk, compact disk, Digital video disk, ROM.
Characteristics of memory are
*Capacity
*Access time
*Cycle time
*Through output
*Non Volatility
Types of memory
1. Random access memory.
2. Read only memory.
3. Flash memory.
Random access memory. (RAM)
It is the main memory of the computer.
When a program is running temporary data is stored here .
RAM is volatile means that it only stores data as long as it supplied with electricity.
When the computer is turned off, all the data in the memory are immediately erased.
Read Only Memory
ROM is non volatile.
It has only read only access.
Types of ROM are
1.PROM ( programmable read only memory)
2.EPROM ( Electrically programmable read only memory)
3.EEPROm ELectrically erasable programmable read only memory )
Flash memory
Flash memory possesses the non-volatility of ROM memories while providing both read and write access .
However, the access times of flash memories are longer than the access times of RAM.
Flash memory is a memory storage device for computers and electronics.
It is most often used in devices like digital cameras, USB flash drives, and video games.
It is quite similar to EEPROM.
Flash memory is different from RAM because RAM is volatile (not permanent).
When power is turned off, RAM loses all its data. Flash can keep its data intact, with no power at all. A hard drive also is permanent (non-volatile) storage, but it is bulky and fragile.
Flash memory is much slower than RAM or hard drives.
But it is great for small electronics because it is small and it has no moving parts.
Examples of flash memory are pendrive.
The term "memory" applies to any electronic component capable of storing data.
Memory can be categorized in to two types
1. Internal memory
2. External memory
Internal memory
It is used to store the data temporary.
It uses micro conductors ,Ex. Electronic circuits.
Internal memory corresponds to random access memory.
External Memory
It is also called physical or auxiliary memory.
It is used to store the data permanently.
Examples of external memory are hard disk, compact disk, Digital video disk, ROM.
Characteristics of memory are
*Capacity
*Access time
*Cycle time
*Through output
*Non Volatility
Types of memory
1. Random access memory.
2. Read only memory.
3. Flash memory.
Random access memory. (RAM)
It is the main memory of the computer.
When a program is running temporary data is stored here .
RAM is volatile means that it only stores data as long as it supplied with electricity.
When the computer is turned off, all the data in the memory are immediately erased.
Read Only Memory
ROM is non volatile.
It has only read only access.
Types of ROM are
1.PROM ( programmable read only memory)
2.EPROM ( Electrically programmable read only memory)
3.EEPROm ELectrically erasable programmable read only memory )
Flash memory
Flash memory possesses the non-volatility of ROM memories while providing both read and write access .
However, the access times of flash memories are longer than the access times of RAM.
Flash memory is a memory storage device for computers and electronics.
It is most often used in devices like digital cameras, USB flash drives, and video games.
It is quite similar to EEPROM.
Flash memory is different from RAM because RAM is volatile (not permanent).
When power is turned off, RAM loses all its data. Flash can keep its data intact, with no power at all. A hard drive also is permanent (non-volatile) storage, but it is bulky and fragile.
Flash memory is much slower than RAM or hard drives.
But it is great for small electronics because it is small and it has no moving parts.
Examples of flash memory are pendrive.
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