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22-Elec-A4 Digital Systems and Computers: May 2018

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Combinational circuit — even / equal-MSB detector and odd-sum detector
  2. Question 2 Start/stop 3-bit synchronous counter
  3. Question 3 RS + T flip-flop state machine
  4. Question 4 Shift registers in serial communication
  5. Question 5 Parallel I/O — CPU communication and handshake protocols
  6. Question 6 Multiplexed seven-segment display driver (68HC11)

Start with Question 1 →

National Exams — May 2018 · 16-Elec-A4 Digital Systems & Computers. Closed book, 3 hours. Six questions, 12 marks each; the rubric requires any five, but all six are solved here as a study resource. Approved Casio/Sharp calculator permitted. A Boolean-identity table and the flip-flop excitation table are supplied with the paper (reproduced where used).

Reference texts. M. M. Mano & M. D. Ciletti, Digital Design (6th ed.) — number systems, Boolean minimization, sequential logic; J. F. Wakerly, Digital Design: Principles and Practices (5th ed.) — counters, registers, PLDs; C. Hamacher, Z. Vranesic, S. Zaky & N. Manjikian, Computer Organization and Embedded Systems (6th ed.) — parallel I/O, handshaking, memory-mapped ports; Motorola M68HC11 Reference Manual — port addressing and instruction set.