PIC LAB-1 
Test-3


Page 16
INDEX

Answer the following questions  .   .   .  JavaScript is required!
This test finds out how much you know about basic programming.     

   
1. What does the word "literal" mean?
A number
A value such as 0C3h
A hexadecimal value 
A number loaded into W


2. Write the instruction to put 4Ch into W:
MOVWF 4Ch
MOVLW 4Ch
MOLVW 4Ch
MOVWL 4Ch

3. Write the instruction to move 4Ch from W to file 1B:
MOVLW 1Bh
MOLVW 4Ch,1
MOVLW 4Ch
MOVWF 1Bh

4. Write the instruction to move 4Ch from file 1B to W:
MOVF 1Bh,0
MOVWF 4Ch,1
MOVWF 1Bh,1
MOVF 1B,1

5. Write the instruction to clear the value 4Ch in file 1B:
CLRF 4Ch
CLRF 1Bh,0
CLRF 4Ch,0
CLRF 1Bh

6. Write the instruction to move 4Ch from file 1A to file 1B:
MOVF 1B,1
MOVF 1C,0
MOVWF 1B,1
no instruction exists

7. Write the instruction to decrement file 1B:
DECFSZ 1B,0
DECF 1B,0
DECFSZ 1B,1
DECF 1B,1

8. After the instruction: BCF 06,3 the file will contain:
0101 0000
1111 1010
1111 1000
1010 1010

9. What is the difference between:
         MOVLW 02
         MOVWF 1B
and:
         BSF 1B,2

0000 0010    and   0000 0010 
0000 0011    and   0000 0010 
0000 0010    and   0000 0100


10. The TRIS file is loaded with 0011 1011. Name the output line(s) created by this value.
RB0, RB1, RB3, RB4, RB5
RB1, RB2, RB4, RB5, RB6.
None of the above

11. A LED is connected to the 3rd lowest output.
     Write the instruction to activate the LED:
BSF 06,3
BSF 06,2
BSF 06,4

12. File 1B holds the value 0000 1100.  
      After the following instruction:  BSF 1B,6  the file will contain:
0010 0011
0010 1100
0100 1100
0010 0000

13. Write the instructions to make bit 3 of TRIS 06 an INPUT:
MOVLW 03  and    MOVWF 06
MOVLW 04  and    MOVWF 06
MOVLW 08  and    MOVWF 06

14. For any file, what is the maximum hex value it can contain?
128
FF
256h
255h

15. Write the instructions to make bit 3 of the input/output file HIGH:
MOVLW 03    MOVWF 06
BSF 06,3
MOVLW 11    MOVWF 06


16. What value will be contained in file 1B after the instruction: BSF 1B,4:
0000 1000
0000 1111
0000 0100
unknown

17. Write the two instructions to carry out the following: Put 8E into file 1C
MOVWF 8Eh  and  MOVWF 1Ch
MOVLW 8Eh  and  MOVWF 1Ch
MOVLW 8Eh  and  MOVLW 1Ch
MOVWF 8Eh  and  MOVLW 1Ch

18. A file containing 0000 1001 is ANDed with 1100 1010. The result is:
0000 1001
1000 1000
0000 1000
1100 1000

19. Write the "bit set file" instruction for bit 5 of file 06:
BSF 05,6
BSF 06,5
BSF 05
BSF 06

20. A file containing 0110 1001 is XORed with 1100 1001. The result is:
0110 1001
1001 0110
1010 0000
0001 1111

21. The zero bit in the Status file is:
03,0 
03,1
03,2


22. Name the file after 1F:
1G
20
20h
2A

23. A file contains FF.  After an increment operation, it will contain:
00
FE
F0

24. The result of BCF 1B,3 is:
0000 0000
1111 1100
1111 1111
none of the above

25. Write the value needed to make RA1, RA3 and RA4 inputs:
1010 1111
0001 1010
0101 1101
0000 1101




These are the types of questions you should be able to answer fairly quickly, if you want to design and build microcontroller projects.  If you get less than 20, now's the time to do the PIC Programming Course. Try the test again after the course, I'm sure you will "fly" through the answers and be amazed at how much you have learnt.
You should also build our first PIC project to teach programming: PIC LAB-1.

NEXT