PIC LAB-1 Test 4 Page 17

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Answer the following questions … JavaScript is required!
More questions on programming …
Do you realise, the best way to learn about a topic is with questions?
Even if you know nothing about a topic, a list of questions can be asked. Even if you get 15% correct, this is your starting point. Every time you attempt the questions, your score will rise. After 5 attempts, your result will be as high as 95%.
This is better than any textbook as the retention will be maintained for a longer period of time and your overall score will be higher.

1. Write the instruction to copy the contents of file 1A to W:

MOVF 1A,1
MOVWF 1A,1
MOVF 1A,0
MOVWF 1A,0

2. Write the instruction to put 6Dh into W:

MOVWF 6Dh
MOVLW 6Dh
MOLVW 6Dh
MOVWL 6Dh

3. Write the instruction to move 6Dh from W to file 1B:

MOVLW 1Bh
MOLVW 6Dh,1
MOVLW 6Dh
MOVWF 1Bh

4. Write the instruction to copy 6Dh from file 1B to W:

MOVF 1Bh,0
MOVWF 6Dh,1
MOVWF 1Bh,1
MOVF 6Dh,0

5. Write the instruction to clear the value 6Dh in file 1B:

CLRF 6Dh
CLRF 1Bh,0
CLRF 6Dh,0
CLRF 1Bh

6. Write the instruction to move 6Dh from file 1A to file 1B:

MOVF 1A,1
MOVF 1B,0
MOVWF 1B,1
no instruction exists

7. Write the instruction to decrement file 1A:

DECFSZ 1A,0
DEFC 1A,0
DECFSZ 1A,1
DECF 1A,1

8. After the instruction: BCF 06,4 the file will contain:

0101 0000
1111 1010
1111 1000
1010 1010

9. What is the difference between:
MOVLW 04
MOVWF 1B
and:
BSF 1B,3

0000 0100 and 0000 1000
0000 0011 and 0000 1000
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 2nd lowest output. Write the instruction to activate the LED:

BSF 06, 3
BSF 06, 2
BSF 06,1

12. File 1B holds the value 0000 1100. After the following instruction: BSF 1B,5 the file will contain:

0010 1100
0001 1100
0001 0000
0010 0000

13. Write the instructions to make bit 4 of TRIS 06 an INPUT:

MOVLW 04h MOVWF 06
MOVLW 08h MOVWF 06
MOVLW 10h MOVWF 06

14. For any file, what is the maximum hex value it can store?

128
FF
256h
255h

15. Write the instructions to make bit 3 of the input/output file HIGH:

MOVLW 03 MOVWF 06
MOVLW 08 MOVWF 06
MOVLW 11 MOVWF 06

16. What value will be contained in file 1B after the instruction: BSF 1B,3:

0000 0100
0000 1000
0000 0100
0000 0111

17. Write the two instructions to carry out the following: Put 5E into file 1C

MOVWF 5Eh MOVWF 1Ch
MOVLW 5Eh MOVWF 1Ch
MOVLW 5Eh MOVLW 1Ch
MOVWF 5Eh MOVLW 1Ch

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

0000 1001
1100 1011
0000 1000
1100 1001

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:

1001 1001
0100 1001
1010 0000
0110 1001

21. The zero bit in the Status file is:

03,0
03,1
03,2

22. Name the file after 1F:

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

24. The result of BCF 1B,3 is:

0000 0000
1111 1011
1111 1000
none of the above

25. Write the value needed to make RA1, RA3 and RA5 inputs:

1011 1111
0011 1101
0101 1101
0001 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.