Fall2010_quiz4_solution

# Fall2010_quiz4_solution - BILKENT UNIVERSITY Department of...

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BILKENT UNIVERSITY Department of Electrical and Electronics Engineering EEE212 Microprocessors QUIZ 4 12-23-2010 Fall Semester Open book, closed notes. Use the boxes provided for your answers. Show all your calculations! Duration: 40 minutes Question 1 (25 points) Question 2 (45 points) Question 3 (30 points) TOTAL SOLUTION

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2 For all Questions, show your calculations inside the boxes, otherwise you will get no credits. Do not forget to write the units in your answers. 1) [25 pts] A DAC0808 is interfaced as shown in Figure 1. Answer parts a and b according to this configuration. Figure 1: Connection of DAC0808 a- Write down the values of the following parameters: i. Reference current (I ref ): 5.12V/2kOhm = 2.56 mA ii. Nominal full scale value for Vout: Iref*2kOhm =10.24V iii. Full scale output for Vout: 10.24*255/256 = 10.2V b- What is the value of Vout for the following values of P1? i. P1 = 64 (decimal), Vout: 64x(Iref/256)x4kOhm=10.24/4 = 2.56V ii. P1 = 100 (decimal), Vout: 100x(Iref/256)x4kOhm = 4V
3 2) [45 pts] An 8 bit ADC of the type ADC0804 rounds the result to the nearest integer. (Which can be larger or smaller). Assume that the analog input voltage we want to convert, V

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Fall2010_quiz4_solution - BILKENT UNIVERSITY Department of...

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