DeVry ECET 340 ECET/340 ECET340 HOMEWORK 3 SOLUTION

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ECET 340 Homework 3 Answers /  Microprocessor Interfacing with Lab

Chapter 9: Timer Programming in Assembly and C

 

1. How many free-running timers do we have in the HCS12?

 2. TCNT of the HCS12 is

3. For accurate reading, the TCNT is accessed as (8-bit, 16-bit).

 4. The free-running timer supports a highest prescaler value of

5. The free-running timer supports a lowest prescaler value of

6. Which register holds the TOF?

7. How do we enable the free-running timer?

 

10. Find the frequency and period used by the free-running timer if the crystal attached to the    

 

20. Assume that XTAL = 4 MHz. Find the value needed to generate a time delay of 5 ms.

 

25. Program channel 2 for Output Compare to generate a square wave of 1 kHz with 50%

 

29. Explain the role of the TIOS register for the Input Capture function.

 

32. Explain the role of TCTL3 and TCLT4 in Input Capture function programming.