# Intgrated circut design

⦁ Part 1: Design of Random Number Generator
—————————————————————————- PURPOSE – In this section of the laboratory work you will design a Random Number Generator.
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⦁ Introduction
In many real applications, such as electronic measurements (signature analyzers), communications, random (or better said pseudo random) number generators are needed. This laboratory is dedicated to designing a random number generator whose block diagram is shown in the figure below:

This circuit is known as an autonomous “ Linear Feedback Shift Register” (LSFR). In particular, the circuit presented here is called generic modular LSFR. There are also other types of LSFR’s. It has to be mentioned that this circuit is a pseudo random number generator due to its discrete nature.

In LESR hi is a binary constant, and hi = ‘1’ implies that a connection exists, while hi = ‘0’ implies that no connection exists. Not every binary combination of the vector H is a good one. Usually, the vector H is taken from existing tables for any particular value of n. An encircled ‘+’ symbolizes an XOR gate.

⦁ Design of a pseudo random number (PRN) generator

You will design a random number generator that can generate different 8-bit number
sequences. The initial conditions are loaded on reset (initial starting count). If start is set to ‘1’ the then the pseudo random generator generates a ”random sequence” and when start is set to zero it

stops and holds on to the last value in the sequence.

Pseudo random generator
clock

Start

reset Q (8 bits)
Design and implement the PRG using the polynomial P(x) = 1 + x2 + x3 + x4 + x8. Verify via simulation the operation using different seeds (initial conditions).

Part 2 Game specification:

You will have to design a game whose specifications are as follows: The inputs to the game are Rb ( roll button) and Reset. Reset is used to initiate a new game. When RB is pushed the random number generator will start generating numbers without displaying them until the roll button is released. When the Roll button is released, the controller will compare the two the 4-most significant bits and the 4least significant bits of the generated number) and declare a win if the sum is 7 or 11, a no-win if the sum is 8, 5 or 13 otherwise the sum is stored in a point register and the player is allowed another attempt. If the new value is equal to the value stored in the point register, then the player wins, else he loses. The output of the game (PRN) should be driving two 7-segment LEDs.

Hand in
VHDL code for part 1 and 2. Including the design code, test bench and simulation results

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