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Interfacing to microprocessors

Interfacing to microprocessors

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For the purpose of this discussion, the authors will narrow it down to 8-bit microprocessors since these are some of the simplest and are commonly used in sensor/actuator systems, and because they are representatives of all microprocessors (16- and 32-bit microprocessors are also in common use, but the principles involved in interfacing are essentially the same). Even within these, there are a number of architectures being used. That is less important to the discussion here, and they will emphasize the Harvard architecture because of its simplicity, flexibility, and popularity. However, this architecture, though common, should be viewed as an example

Chapter Contents:

  • 12.1 Introduction
  • 12.2 The microprocessor as a general-purpose controller
  • 12.2.1 Architecture
  • 12.2.2 Addressing
  • 12.2.3 Execution and speed
  • 12.2.4 Instruction set and programming
  • 12.2.5 Input and output
  • 12.2.6 Clock and timers
  • 12.2.7 Registers
  • 12.2.8 Memory
  • 12.2.9 Power
  • 12.2.10 Other peripherals and functionalities
  • 12.2.11 Programs and programmability
  • 12.3 General requirements for interfacing sensors and actuators
  • 12.3.1 Signal level
  • 12.3.2 Impedance
  • 12.3.3 Frequency and frequency response
  • 12.3.4 Input signal conditioning
  • 12.3.4.1 Offset
  • 12.3.4.2 Scaling
  • 12.3.4.3 Isolation
  • 12.3.4.4 Loading
  • 12.3.5 Output signals
  • 12.4 Errors
  • 12.4.1 Resolution errors
  • 12.4.2 Computation errors
  • 12.4.3 Sampling and quantization errors
  • 12.4.4 Conversion errors
  • 12.5 Problems

Inspec keywords: sensors; microprocessor chips; actuators

Other keywords: actuator systems; sensor systems; Harvard architecture; microprocessors

Subjects: Sensing devices and transducers; Microprocessor chips; Microprocessors and microcomputers

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