Microcontroller
  • A Microcontroller (or MCU for microcontroller unit) is a small computer on a single integrated circuit.
  • In modern terminology, it is a System on a chip. A microcontroller contains one or more CPUs (processor cores) along with memory and programmable input/output peripherals.
Application of Microcontroller

Application of Microcontroller in Day to Day Life Devices:
• Light sensing & controlling devices
• Temperature sensing and controlling devices
• Fire detection & safety devices

Application of Microcontroller in Industrial Control Devices:
• Industrial instrumentation devices
• Process control devices

Applications of Microcontroller in electronic equipment’s:
• Mobile Phones
• Auto Mobiles
• Washing Machines
• Cameras
• Security Alarms

Addressing Modes
  • These are the instructions used to transfer the data from one register to another register, from the memory to the register, and from the register to the memory without any alteration in the content.
  • We can specify address of operand in various ways. Addressing modes in 8085 is classified into 5 groups
1) Immediate addressing mode
2) Register addressing mode
3) Direct addressing mode
4) Indirect addressing mode
5) Implied addressing mode

Example of instruction
• ADD, SUB, MULT, MOV, LOAD, STORE, PROD

• Example of register (means operand)
• B, C, D, R1, R2

• # means address
• 4, 5k means value

• [B] means data in B work as an address of operand

• For example: ADD #4, R1
                          means value 4 is add into register R1.


Computer Instruction & Addrersing Mode


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