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ECET 340 Entire Course

•  
• 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
• ECET 340 Week 4 iLab 4
• ECET 340 Week 5 HomeWork 5
• ECET 340 Week 5 iLab 5
• ECET 340 Week 6 HomeWork 6
• ECET 340 Week 6 iLab 6

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ECET 340 Week 1 HomeWork 1

• 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 Week 1 iLab 1

• 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.

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ECET 340 Week 2 HomeWork 2

• 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
• 6. Given the starting address for the TC0
  Interrupt is to become 5000. Write the assembly
  instruction necessary to place this ISR address
  into the interrupt vector table and then unmask
  the interrupt (assembly only). 3 points

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ECET 340 Week 2 iLab 2

• ECET 340 Week 2 iLab 2

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ECET 340 Week 3 HomeWork 3

• 1. 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 Week 3 iLab 3

• SOLVED ECET 340 iLAB3
• 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.

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ECET 340 Week 4 HomeWork 4

• 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

• I. OBJECTIVES
• 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.
• To become more proficient in programming displays
  for real-time operation.

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ECET 340 Week 5 HomeWork 5

• 1. Explain, briefly, why an analog restoring
  filter is sometimes used at the output of a DAC.
•  2. Give Iref 2 mA for a DAC1408 IC, find Iout
  for the input 1110 1110
•  3. 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 Week 5 iLab 5

• 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.
• Deliverables
• For this lab, the deliverables include the cover
  sheet,
• filled-in sections of the lab report, photographs
  (online), or instructor
• sign-offs (onsite), and answers to the questions.
  The cover sheet must be
• completed in typed format.

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ECET 340 Week 6 HomeWork 6 (Devry)

• 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?
•  4. Two input capture events occur at 0x1037 and
  0x002A. If the prescaler bits PR210 are set
  to 101 and the e clock is 24 MHz, how much time
  as transpired between the two events?

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ECET 340 Week 6 iLab 6 (Devry)

• ECET 340 Week 6 iLab 6 (Devry)

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ECET 340 Week 7 HomeWork 7 (Devry)

• 1. 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

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ECET 340 Week 7 iLab 7

• ECET 340 Week 7 iLab 7

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