Microprocessors

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• Microprocessors

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Books

• Microcontroller 8051Publisher BaghaniPub.Date 
  1380ISBN 964-7343-00-0Pages 380Author Mohamm
  ad ali Mazidi Jonis Glispi Mazidi
• Translator Dr. Sepidnam

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Books

• The 8051 MicrocontrollerPublisher BaghaniPub.Da
  te 1380Publishing Turn 5Edition Turn 3ISBN 
  964-91532-2-5Pages 383Author Iscott Makenzi
• Translator Rezaei Nia ,Darbandi Azar

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Intruduction

• Microprocessor (MP)(MPU)
• A MP is a CPU on a single chip.
• Components of CPU
• ALU, instruction decoder, registers, bus control
  circuit, etc.
• Micro-computer (M-Computer)
• small computer
• MP peripheral I/O memory specifically for
  data acquisition and control applications
• Microcontroller (MC)
• M-Computer on a single chip of silicon

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MP vs. MC

• architecture
• A MP
• only is a single-chip CPU
• bus is available
• RAM capacity, num of port is seletable
• RAM is larger than ROM (usually)
• A MC
• contains a CPU and RAM,ROM ,timers, Prepherals,
  I/O port in a single IC
• internal hardware is fixed
• Communicate by port
• ROM is larger than RAM (usually)
• Small power consumption
• Single chip, small board
• Implementation is easy
• Low cost

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MP vs. MC cont.

• Applications
• MCs are suitable to control of I/O devices in
  designs requiring a minimum component
• MPs are suitable to processing information in
  computer systems.

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MP vs. MC cont.

• Instruction
• MP have powerfull addressing mode
• MP instruction work with nibble,byte,word,dw
• MC have instruction to work with bits (only I/O)
• MC have slower speed in processing of data

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MP vs. MC cont.

• MC is easy to use and design.
• Only single chip can be a complete system
• interfacing to other devices,
• for example, motors, displays, sensors, and
  communicate with PC.
• In contrast, similar system that builds from
• MP would require a lot of additional units,
• such as RAM, UART, I/O , TIMER and etc.

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MC is a Reusable Hardware

• Logic circuit provides limited function for one
• single design. In order to change circuits
• functionality, we need to redesign the
  circuits.
• MC can reprogram and change functionality of
• every port, input to output or digital to
  analog
• on the fly.

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MC Application

• In cars
• In home (refrigerator )
• In automation of factory
• In shop ( pos )
• In town ( led board , lamps)
• In