Question

01 (a) As a designer, state the principles that normally applied in designing digital circuits. Give your opinion on why the principles are very important. (6 marks) (b) A PLD is a general-purpose chip for implementing logie cireuits. It contains a collection of logic circuit elements that can be customized in different ways. State three advantages of CPLD compared to FPGA. (3 marks) O2 (a) By referrine to the Verilor code in Listing Q2 (a). find and explain the syntax errors (if any). Rewrite the correct syntax for each error found Note that es for printive gates are optional) Lin2 Line 3 Line 6 /L: 7 Listing 2() (10 marks) (b) By referring to the Boolean expression below, construet the Verslag eode Um the data flow modelluny (c) Listing O2() shows a Verilog code of a digital system. Sketch the functional blocle diagram (IBD) of the circuit that is modelled by the code. Label all the wes and ports. module Module_test(a, b, c, d, s, Y); input a, b, c, d, s; output reg [3:0]y: reg x1, x2: always @ (a,b, s) if (s==1) x1 = b; else xl = a; always @ (c,d,s) if (c==1) x2 el se x2 = c; = d; always (x1, x2) case ({x1, x2)) 0: Y = 4'hl: 1: Y = 4'h2; 2: y = 4'h4; 3: Y = 4'h8; endcase endimodule

Answer 1

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          Please find the answer to Q1 attached as under. Please give a thumbs up rating if you find the answer useful! Have a rocking day ahead!

1. (a) The normal prinbciples applied for the design of digital circuits are as follows:

- The logic is first designed through state tables and circuitry through K maps and variable reduction techniques. At every stage, the circuit design is simulated through software.

-Once the final circuit is designed, prototypes are manufactured and tested in all possible conditions.

- The user is always involved throughout the design process

- While designing, care is taken to consider delay times, rise times and hazards.

(b) CPLD uses lesser number of interconnection logics and are hence more advantageous for simpler circuits.

- CPLDs are cheaper than FPGA's

- CPLDs can be programmed more quickly and efficiently than FPGAs.

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