Reg 210.2 न 00000561121900۳۰:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: EC361
Course Name: DIGITAL SYSTEM DESIGN
Max. Marks: 100 Duration: 3 Hours
PART A
Answer any two full questions, each carries 15 marks. Marks

1 a) Examine the clocked synchronous sequential network given below and obtain the (10)
excitation equation, excitation table, state transition table, state table and state
diagram.

b) Draw the ASM chart for mod-8 down counters. (5)
2 a) Obtain a primitive flow table and minimal-row flow table for a fundamental (10)
mode asynchronous sequential network with two inputs x1, x2 and one output z.
The inputs x1 and x2 never change simultaneously. The output is same as x2 if
೫1 = 1. However if x1 = 0, the output should remain fixed at its last value.
b) With a transition table, explain the concept of critical race, non-critical race and (5)
cycle.
3 8) Explain the three steps in state table reduction. (6)
b) Find the reduced flow table for the following: (9)