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Overview or Features of 8086

  • It is a 16-bit Microprocessor(μp).It’s ALU, internal registers works with 16bit binary word.
  • 8086 has a 20 bit address bus can access up to 220= 1 MB memory locations.
  • 8086 has a 16bit data bus. It can read or write data to a memory/port either 16bits or 8 bit at a time.
  • It can support up to 64K I/O ports.
  • It provides 14, 16 -bit registers.
  • Frequency range of 8086 is 6-10 MHz
  • It has multiplexed address and data bus AD0- AD15 and A16 – A19.
  • It requires single phase clock with 33% duty cycle to provide internal timing.
  • It can prefetch upto 6 instruction bytes from memory and queues them in order to speed up instruction execution.
  • It requires +5V power supply.
  • A 40 pin dual in line package.
  • 8086 is designed to operate in two modes, Minimum mode and Maximum mode.
    • The minimum mode is selected by applying logic 1 to the MN / MX# input pin. This is a single microprocessor configuration.
    • The maximum mode is selected by applying logic 0 to the MN / MX# input pin. This is a multi micro processors configuration.