Friday, February 19, 2016

Memory Basics

Most widely used Memory Terminology in Computer

  • Memory is one of the most important feature of a computer
  • A bit is a binary digit that can have the value 0 or 1
  • A byte is defined as 8 bits
  • A nibble is half a byte, or 4 bits
  • A word is two bytes, or 16 bits
  • A kilobyte is 210 bytes, or 1024 bytes
  • A megabyte is 220 bytes, or 1024 kilobytes
  • A gigabyte is 230 bytes, or 1024 megabytes
  • A terabyte is 240 bytes, or 1024 gigabytes
  • RAM and ROM are the types of memory commonly used in computer
  • RAM stands for Random Access Memory
  • RAM is used for temporary storage of programs that it is running
  • RAM is called volatile memory. The data is lost when the computer is turned off
  • ROM stands for Read Only Memory
  • ROM is used to store programs and information essential for the operation of computer
  • ROM is called non-volatile memory. The data is lost when the computer is turned off
  • RAM and ROM memories are referred to as primary memory
  • A memory chip contains 2x locations, where x is the number of address pins
  • Each location contains y bits, where y is the number of data pins on the chip
  • The entire chip will contain 2x * y bits, where x is the number of address pins and y is the number of data pins on the chip



Related topics:
Microcomputer System   |   Microcomputer System Architecture   |   Numbering System   |   Digital Logic   |   ASCII Code   |   Computer Internals   |   ROM and RAM Memory

List of topics: Microcomputer

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