Chapter thirteen
Input/output systems
Objectives
The objectives of this chapter are that, after studying it, the reader should be able to:
- Identify interface requirements and how they can be realised: buffers, handshaking, polling and serial interfacing.
- Explain how interrupts are used with microcontrollers.
- Explain the function of peripheral interface adapters and be able to program them for particular situations.
- Explain the function of asynchronous communication interface adapters.
13.1 Interfacing
When a microprocessor is used to control some system it has to accept input information, respond to it and produce output signals to implement the required control action. Thus there can be inputs from sensors to feed data in and outputs ...
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