ECET 330 DeVry Final Exam

ECET 330 DeVry Final Exam
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ECET 330 DeVry Final Exam
ECET330
ECET 330 DeVry Final Exam
ECET 330 DeVry Final Exam
Page 1
Question 1.1. (TCO 1) The characteristics of dynamic memory compared to static memory are (Points : 8)
o
o
o
o
higher density, higher cost.
higher density, lower cost.
lower density, higher cost.
lower density, lower cost.
Question 2.2. (TCO 1) Which of the following is volatile memory? (Points : 8)
o
o
o
o
o
ROM
RAM
Flash
All of the above
None of the above
Question 3.3. (TCO 1) With a 24-bit address bus, we get _____ bytes of memory space. (Points : 8)
o
o
o
o
24M
16M
64M
64K
Question 4.4. (TCO 2) Which bus is bidirectional? (Points : 8)
o
o
o
o
o
Address
Data
Control
All of the above
None of the above
Question 5.5. (TCO 2) Which bus carries memory contents? (Points : 8)

o
o
o
o
Data bus
Address bus
Control bus
None of the above
Question 6.6. (TCO 2) The address bus is __________. (Points : 8)
o
o
o
o
bidirectional
unidirectional
able to be programmed to be either bidirectional or unidirectional
None of the above
Question 7.7. (TCO 3) To use JSR (or CALL) instruction, we must initialize _____ register. (Points : 8)
o
o
o
o
X
Y
PC
SP
Question 8.8. (TCO 3) Find the value of Register A for the following program.
LDAA #$55
EORA #$AA (Points : 8)
o A = $00
o A = $FF
o A = $7F
o None
Question 9.9. (TCO 3) The dollar sign ($) that precedes numbers in MC9S12 assembly language means that
(Points : 8)
o
o
o
o
o
it is a hexadecimal number.
it is a decimal number.
it is immediate mode.
All of the above
None of the above
Question 10.10. (TCO 3) The largest value (in hex) that can be loaded into Register A of HCS12 is (Points : 8)
o $08.
o $255.
o $65535.
o $FF.
Page 2
Question 1.1.(TCO 4) What addressing mode is used for the instruction, INX? (Points : 8)
o
o
o
o
o
Direct
Indexed
Inherent
Immediate
None of the above
Question 2.2.(TCO 5) When instruction, “jsr”, is executed, the return address is stored at (Points : 8)

o
o
o
o
PC.
CCR.
SP.
memory pointed by SP.
Question 3.3.(TCO 5) After the execution of the following code, the value in Register D is:
LDAA #$BB
LDAB #$CC
ANDA #$0F
ANDB #$F0 (Points : 8)
o
o
o
o
o
$FFFF.
$CCBB.
$C00B.
$0BC0.
None of the above
Question 4.4.(TCO 5) Which bit is used to indicate the sign of a 16-bit signed number? (Points : 8)
o
o
o
o
D0
D15
D7
D1
Question 5.5.(TCO 5) In the following program, the maximum number of iterations is limited to _________.
L1 CLRA
NOP
NOP
DECB
BNE L1 (Points : 8)
o 255
o 100
o 0x200
o 0x99
Question 6.6.(TCO 7) What C-language construct does the following assembly code implement? cmpb #10 bpl
ADD37H addb #$30 bra CONT ADD37H: addb #$37 CONT: stab 0,x (Points : 8)
o
o
o
o
o
Loop
If
If /else
All of the above
None of the above
Question 7.7.(TCO 8) Assume that PORTB has a value of 0x37. Which of the following gives us unpacked BCD
for 7? (Points : 8)
o PORTB = PORTB & 0x37;
o PORTB = PORTB | 0x30;
o PORTB = PORTB | 0x0F;

o
PORTB = PORTB & 0x0F;
Question 8.8.(TCO 8) The following program creates square wave pulses on PB0. What is the duty cycle?
ORG $8000 LDS #$4000 LDAA #$FF STAA DDRB BACK BSET PORTB,%00000001 JSR DELAY JSR DELAY BCLR
PORTB,%00000001 JSR DELAY JSR DELAY BRA BACK (Points : 8)
o 75%
o 66%
o 50%
o 25%
Question 9.9.(TCO 8) Find the value for PORTB after the execution of the following code: PORTB = 0x55 ^ 0xFF;
(Points : 8)
o
o
o
o
PORTB = 0x05
PORTB = 0x0A
PORTB = 0xAA
PORTB = 0xFF
Question 10.10.(TCO 8) Fill in the blank to get 0x38 on PORTB. unsigned char BCD_Byte = 0x89; unsigned char
x; x = BCD_Byte & 0xF0; _____; PORTB = x | 0x30; (Points : 8)
o
o
o
o
x=x>>4;
x=x>>2;
x=x