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Microcontroller Interfacing
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Output Levels
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Interpretation of TimingDiagrams
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Analog to Digital Converters Sampling rate (MHZ)
Sampling resolution (bits)
Interface type (parallel or serial)
Reference voltage (volt) Input range (unipolar or bipolar)
Sample-and-hold circuit usually inside chip
Note: Analog antialiasing filter must be in place
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ADC Technologies
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Parallel Interface Example
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Serial Interface Example
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Memory
External interface possible in most cases
Nonvolatile EPROM
Voltile RAM (SRAM, DRAM, etc.)
Nonvolatile EEPROM Nonvolatile FLASH
Refer to timing diagram for each to know howto interface with microcontroller
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Temperature Sensors
Thermistors (PTC, NTC)
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Optical Sensors
Switches
Isolators
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Magnetic Sensors
LVDT
Hall effect
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Mechanical Switch
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Motor Interfacing
Stepper motor
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Motors DC motor
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Motors Brushless DC
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TRIACs
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Microcontrollers Which microcontroller to use?
8051
PIC
ARM
AD
TI
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8051 Summary Selection of microcontroller
Definition of pins Block diagram
Instruction set
Memory map I/O ports
Timers
Interrupts
UART
Practical development
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Microcontroller Architecture
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Microcontroller Selection
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Pin Diagram
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Addressing Modes
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Addressing Modes
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I/O Ports
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UART
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Practical Development
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Standard Software Development
Process1. Create or edit an ASCII text file containing the human readable
source code, also known as the program instructions.
2. Translate the source code to machine-readable binary instructioncode using a language translator. This is accomplished using anassembler or compiler.
3. Load the program memory with the binary instruction code into
the processors program memory chip. For the SDK, the programis downloaded into program memory on the SDK.
4. Execute the program to test it and find program errors. For theSDK, this debugging process is facilitated using a specialprogram (debugger or monitor) resident on the SDK.
5. Once the problem is located, the source code is corrected byrepeating this process until all errors are corrected.
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