1. design a mod-16 ripple down counter using positive
triggered
2. design a synchronous counter to count in the following
sequence : 15, 9,, 11, 5, 2, 13, 1
Design the circuit that gives the total number of your school
number as an asynchronous counter. If 4 + 6 + 0 + 4 + 1 + 8 + 0 + 4
+ 0 = 27, Mode 28 counter will be designed. FF with negative edge
triggering will be used. You will definitely show the clock pulse,
input and output connections of the FFs you will use. Otherwise,
you will not get points because the counter will not work or...
Direct reset MOD 12 synchronous down counter
circuit
Designed using falling edge trigger SR FF
It is desirable. A, B, C, and D FFs in the circuit to be
designed
It will be used. Here the highest-valued output is considered
A
It will be. When this design is done, only SA and RA of A FF
after doing logic functions to be applied to their inputs
then write in the fields below. (Counter circuit design
write the steps in the...
A) Design 0?379 count?up counter with BCD counter
blocks if input clear signal is synchronous.
B) Design 0?379 count?up counter with BCD counter blocks if
input clear signal is Asynchronous.
C) Design of 1/577 frequency divider with BCD count?up counters
(Clear signal is Asynchronous)
Flip-flops:
a) Make a asyncronous MOD 12 flip-flop up counter circuit
b) Make a syncronous MOD 14 flip-flop up counter circuit
c) Each flip-flop has the same propagation delay, which is 10ms.
Calculate the maximum clock frequency of the circuit in questions
(a) and (b)
(a) What is the difference between synchronous and asynchronous
stream ciphers.
(b) Who was Horst Feistel?
(c) What is the main weakness of affine ciphers?
(d) What is the Kerckhoffs’ principle?
(e) Suppose a block cipher uses m-to-m bits S-boxes. How many
bits are required to store the look-up table of k different such
m-to-m bits S-boxes? Give a formula in terms of k and m. Hint: A
look-up table for one DES S-box requires 256 bits of storage.