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MEMORY (VOLATILE MEMORY (Memory that loses its contents when the power is…

- - - - Memory chips that holds data or programs
        that are currently being used by the processor
      - Can be read from and written to by the
        processor
      - Volatile - loses its contents when the power is
        turned off.
      - Types of RAM chips
        
        DRAM (Dynamic RAM) - Chips must be reenergized
        constantly to keep their contents.
        
        SRAM (Static RAM) - Do not have to be reenergized
        as often as DRAM chips, faster access time,
        more reliable but more expensive than DRAM.
        
        MRAM (Magnetoresistive RAM) - Stores data
        using magnetic charges instead of electrical charges,
        greater storage capacity, consume less energy, faster
        access time, more expensive, and non-volatile
    - - Memory chips that stores permanent data or
        instructions needed by a computer or devices.
      - Can be read from, but cannot be written to by
        the processor.
      - Non volatile – does not lose its contents when
        the power is turned off.
      - Types of ROM chips
        
        PROM (Programmable ROM) - A blank ROM chip
        which a programmer can write permanently; once
        written, the contents cannot be erased or changed.
        
        EPROM (Erasable Programmable ROM) -
        Allows the programmer to erase the contents by
        exposing to ultraviolet light.
        
        EEPROM (Electrically Erasable Programmable
        ROM) - Allows the programmer to erase the
        contents with an electric signal.