Digital Electronics N6 — Document
November 2023 — N6 — Digital Electronics
N6
2023
Nated Engineering
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Q1— Section header —
1.5\n the ANSWER BOOK.
1.1A code that is used in sequential counting in which only one bit changes at time as the count progresses
1.2An electronic circuit in chip form that changes analogue inputs into digital outputs
1.3An electronic circuit in chip form that can be used as a pulse distributor in a central processing unit
1.4Activity on the sun's surface that can cause disruption in satellite communication
1.5The technical term for starting a computer up (5 1\ [5]5
Q2— Section header —
2.5\in the ANSWER BOOK.
2.1Which ONE of the following interrupts has to be attended to immediately? Internal External Priority Non
2.2A system in which several data inputs are interfaced with a computer: Frequency shifted keying Data acquisition system The Seebeck effect
2.3Which ONE of the following is the solution for .B.1 + 0? .B
2.4The ray equivalent of the binary number 11001
2.5The binary equivalent of 0101 1100 xs 11000
Q3— Section header —
3.5n the ANSWER BOOK. COLUMN A COLUMN B
3.5A graphical representation of the steps involved in finding the solution to a given problem A high level business language A high
Q4— Section header —
4.5\n the ANSWER BOOK.
4.1The absorption rule in Boolean algebra can be described by the following identity: D.E + D.F = D(E + F\
4.2A computer is said to be on line if it is switched on.
4.3If data is processed as it is entered the system is said to operate in real time.
4.4A stepp ing motor switch is associated with data routing. 8080376
4.5The step voltage on a digital to analogue converter refers to the voltage on the output when all inputs are high. (5 1\ [5] TOTAL SECTION A: 20 SECTION B5
Q5— Section header —
5.1A calculator is designed to have a five bit opcode. What is the maximum number of functions that the calculator could have?
5.2A computer numeric control (CNC\system can be used to shap an object to preset specifications.
5.2.1Draw a fully labelled diagram of a CNC system that could perform this task. (7\
5.2.2Briefly describe how th is CNC system would function. (3\
5.3What is meant by real time processing ? N ame any TWO applications of real time processing
Q6— Section header —
6.1Draw block diagram of a complete four input data acquisition system. The system must incorporate a random access memory, th
6.2The following data packages are transmitted using PCM (pulse coded modulation\at uses NRZ (non return to
6.3Write the following abbreviations or acronyms out in full
6.3.1USART
6.3.2CPU
6.3.3ALU (3 1\ (3\
6.4six bit analogue to digital converter produces an output of 000001 when 10
6.4.1Calculate the full scale voltage of the analogue to digital converter
6.4.2Calculate the output when 0,5 V is applied to the input. (2 2\ (4\ [19] 808037619
Q7— Section header —
7.1Control units vary from one computer to another. Base your answer on the Von Neumann rchitecture where a common RAM holds all data and program instructions, necessitating a fetch execute routine.
7.2The decoder in the block diagram in QUESTION
7.1ha s the following instruction set: INSTRUCTION OPCODE LDA 0010 ADD 1000 SUB
7.3When certain instructions such as LDA and STA are executed, the last pulse is (3\ [18]18
Q8— Section header —
8.1Consider the following FORTRAN program segment JIM = 14 MORRISON = 9 21100 DOORS = JIM + MORRISON JIM = JIM + 7 IF (DOORS.LT.40\TO 21100 MORRISON = MORRISON + 7 PRINT JIM, MORRISON
8.2The following is a section of a program in machine code INSTRUCTION # OPCODE ADDRESS DESCRIPTION 0000 0011 1001 L DA
Q9— Section header —
9.1The following word is received in Hamming ode. By showing all the steps involved find the fault in the word
9.2Write the following floating point numbers in decimal, showing all your steps
9.2.1101 0 1111000 (3\
9.2.2101 1 1111000 (3\
9.3Simplify the following Boolean problem: + C + AB + BC + ABC (2\ [15] TOTAL SECTION B: 80 GRAND TOTAL:15
Multiple Choice Options
1D)E + D.F = D(E + F\
Topics Identified
1
Business Plan
Mark Allocation
Total100 marks
Sections5 + 5 + 5 + 5 + 13 + 19 + 18 + 15 + 15 = 100 marks
Paper information
TitleDocument
SubjectDigital Electronics
LevelN6
Document typeQuestion paper
Year2023
MonthNovember
Pages7
Downloads4
Examination context
Decade2020s
Years ago3y
SeasonSpring (SH)
Start dayWednesday
Exam periodNovember 2023
Days since exam1,074
About Digital Electronics examination preparation
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A practical revision approach
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