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ECET 340 Course Extraordinary Success
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ECET 340 Course Extraordinary Success
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• ECET 340 Entire Course

• ECET 340 Week 1 HomeWork 1

• ECET 340 Week 1 HomeWork 1
• ECET 340 Week 1 iLab 1
• ECET 340 Week 2 HomeWork 2
• ECET 340 Week 2 iLab 2
• ECET 340 Week 3 HomeWork 3
• ECET 340 Week 3 iLab 3
• ECET 340 Week 4 HomeWork 4

• 1. Give three examples each of internal and
  external peripheral devices as referenced to the
  HCS12 microcontroller and not an entire PC. (2
  points)2. Given the requirements of each
  signals destination must match the capabilities
  of the signals source, name some of the
  electrical signal parameters that must be
  considered when designing an interface between
  two different hardware components. (2 points)

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ECET 340 Course Extraordinary Success
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• ECET 340 Week 1 iLab 1

• ECET 340 Week 2 HomeWork 2

• oBJECTIVES
• To become familiar with Microcontroller MC9S12
  parallel ports and how simple input and output
  devices are interfaced through them.
• To learn how to program I/O instructions in C
  language.
• To learn how to organize a program to read data
  from input ports, process the data, and display
  the result on a simple output device.

• 1. Where does program control transfer to when an
  interrupt occurs? 2 points
• 2. Which one of the following Interrupts has
  highest priority? 2 points
• 3. RAM Vector table addresses 3E52 belongs to
  which interrupt? 2 points
• 4. Before exiting an ISR, the programmer should
  use which command? 2 points
• 5. In which one of the following sequences is the
  stack pulled by rti? 3 points

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• ECET 340 Week 2 iLab 2

• ECET 340 Week 3 HomeWork 3

• ECET 340 Week 2 iLab 2

• . Sketch a circuit that can be used to debounce a
  pushbutton and explain how it works. (4 points
  max)
• 2. In Figure 7.32 on page 339 of the Huang
  textbook, if the row has and the columnsare ,
  which key is pressed? (2 points max)
• 3. In Figure 7.32 on page 339 of the Huang
  textbook, explain why the 10k? resistors ties to
  VCC are required. (2 points max)

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ECET 340 Course Extraordinary Success
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• ECET 340 Week 3 iLab 3

• ECET 340 Week 4 HomeWork 4

• OBJECTIVES
• To learn the basic operation of a keypad.
• To understand how to interface a keypad to a
  microprocessor.
• To learn how to program a keypad driver in C
  language.
• To learn how to program a keypad activated
  interrupt that identifies the key being pressed
  and displays or otherwise returns its value to
  the main program.

• 1. Determine the conversion time for an ADC0804
  (8-bit), where 66 clocks per bit are required, if
  its clock frequency is 50 kHz.2. If an 8-bit
  SAR has Vref 10 V, what is the binary value for
  an input voltage of 7.28 V?3. What is the
  percent error for the binary answer found in
  Problem 2?4. Given an 24 MHz bus speed. Write
  down the line(s) of instruction which set the
  ATD1 unit for 2MHz conversion frequency, 10-bit
  resolution and 8 A-to-D clocks per sample time.

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• ECET 340 Week 4 iLab 4

• ECET 340 Week 5 HomeWork 5

• To learn how to use A-to-D converters to digitize
  signals from analog input devices.
• To learn how to write a C language program that
  samples the data from an analog device, digitizes
  it and formats it for output on an LCD.

• 1. Explain, briefly, why an analog restoring
  filter is sometimes used at the output of a DAC.
  2. Given Iref 2 mA for a DAC1408 IC, find
  Iout for the input 1110 11103. Find the number
  of discrete voltages output by a 12-bit DAC. Show
  work.4. Use the internet to locate the data
  sheet for an MC1408 DAC. From it find, for the
  MC1408-7 version, the following
• a. The settling time
• b. Accuracy at full scale output current (1.99
  mA), 25ºC

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ECET 340 Course Extraordinary Success
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• ECET 340 Week 5 iLab 5

• ECET 340 Week 6 HomeWork 6

• Scenario/Summary
• This week's lab covers two areas, conversion of
  digital HCS12 signals to an analog format, and
  the use of a Serial Peripheral Interface (SPI)
  to transfer data, and commands between the
  HCS12, and the DAC peripheral.

• 1. What are the four main functions of the HC12
  Timer unit? 2. Two input capture events occur
  at counts 0x1037 and 0xFF20 of the free-running
  counter. How many counts (in decimal) have
  transpired between these two events?3. What is
  the maximum time possible before the free-running
  counter overflows when the e MHz?

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• ECET 340 Week 7 HomeWork 7

• ECET 340 Week 7 iLab 7

• . The movable part of the solenoid is the 2
  points
• 2. Why is the 6N139 optoisolator used in the
  interfaces to devices such as large motors? 2
  points
• 3. Calculate the number of steps per revolution
  for a stepper motor with a step angle of 7.5. 2
  points
• 4. How is stepper motor speed controlled? State
  any two ways a program can do this. 2 points

• ECET 340 Week 7 iLab 7

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