Test 1
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University of Bahrain Information Technology College Computer Engineering Department ITCE 344 : µP-Based Design Test 1 Time: 1 hour
Date: May 4, 2009 Dr. Riyadh Al-Hakim
Name:
Sec:
ID #:
Show all your work.
Question
Max Mark
Q1
35
Q2
35
Q3
30
Mark Scored
Total out of 100
Q1. Show with clear schematic diagram how to add to 86-traner kit:
16 kB RAM starting at 2000:0000 ; and 8 kB ROM ending at E000:FFFF
Q2.
Connect switch K1 to PC7 and switch K2 to PC6 of the PPI. Write an optimum program that uses these switches to select the square wave output frequency of counter 2 of the PIT, such that: K1 K2 frequency 0 0 1
0 1 X
150 kHz 15 kHz 1.5 kHz
The PPI is located @ FFE0 and the PIT @ FFF9 with 1.5 MHz clock.
Q3.
A PIC, located @ FFF4, is programmed with ICW2 = 20h. The main program is located @ 3000h and the ISR of IRQ6 is located @ 5000h. Explain with numbers the steps taken by the µP when an interrupting signal is applied to IRQ6. Also explain with numbers the steps taken by the µP when the instruction IRET is executed in the ISR.
Date: May 4, 2009 Dr. Riyadh Al-Hakim
Name:
Sec:
ID #:
Show all your work.
Question
Max Mark
Q1
35
Q2
35
Q3
30
Mark Scored
Total out of 100
Q1. Show with clear schematic diagram how to add to 86-traner kit:
16 kB RAM starting at 2000:0000 ; and 8 kB ROM ending at E000:FFFF
Q2.
Connect switch K1 to PC7 and switch K2 to PC6 of the PPI. Write an optimum program that uses these switches to select the square wave output frequency of counter 2 of the PIT, such that: K1 K2 frequency 0 0 1
0 1 X
150 kHz 15 kHz 1.5 kHz
The PPI is located @ FFE0 and the PIT @ FFF9 with 1.5 MHz clock.
Q3.
A PIC, located @ FFF4, is programmed with ICW2 = 20h. The main program is located @ 3000h and the ISR of IRQ6 is located @ 5000h. Explain with numbers the steps taken by the µP when an interrupting signal is applied to IRQ6. Also explain with numbers the steps taken by the µP when the instruction IRET is executed in the ISR.
