Lesson 5

• Interface


  The path for communication between two components.
• The main purpose of the I/O interfaces

  Transmit and receive data to and from the microprocessor.
• Input-Output Interface


  Used as a method which helps in transferring of information between the

  internal storage devices i.e. memory and the external peripheral device.
• Peripheral device


  that which provide input and output for the computer, it is also called Input-Output devices.
• Functions of Input/Output Interface

  1.It is used to synchronize the operating speed of CPU with respect to input-output devices.

  2. It selects the input-output device which is appropriate for the interpretation of the input-output

  device.

  3. It is capable of providing signals like control and timing signals.

  4. In this data buffering can be possible through data bus.

  5. There are various error detectors.

  6. It converts serial data into parallel data and vice-versa.

  7. It also converts digital data into analog signal and vice-versa.
• Interface device


  A hardware component or system of components that allows a human being to interact with a computer, a telephone system, or other electronic information system.
• PIC microcontroller


  can be used as the ‘brain’ to control a large variety of products. In order to control devices, it is necessary to interface (or ‘connect’) them to this.