thw_mod5_no4 - Number of P-terms required to implement...

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ECE 270 Introduction to Digital System Design Fall 2011 TakeHomaWork for Module 5 – Due November 9, 2011 1. [20 points] Compile the ABEL program (listed below) using ispLever in order to determine the minimum number of P-terms required for the code as written . Attach a copy of the Reduced Equation report to document your answers. MODULE cla4 TITLE '4-bit Carry Look-Ahead Adder for 26V12' DECLARATIONS X0..X3, Y0..Y3 pin; " operands CIN pin; " carry in S0..S3 pin istype 'com'; " sum outputs C0..C3 pin istype 'com'; " carry outputs (C3 is carry out) G0..G3 pin istype 'com'; " generate functions P0 = X0$Y0; " propagate functions P1 = X1$Y1; P2 = X2$Y2; P3 = X3$Y3; EQUATIONS G0 = X0&Y0; " generate functions G1 = X1&Y1; G2 = X2&Y2; G3 = X3&Y3; " carry functions C0 = G0 # CIN&P0; C1 = G1 # G0&P1 # CIN&P0&P1; C2 = G2 # G1&P2 # G0&P1&P2 # CIN&P0&P1&P2; C3 = G3 # G2&P3 # G1&P2&P3 # G0&P1&P2&P3 # CIN&P0&P1&P2&P3; S0 = CIN$P0; " sum bit outputs S1 = C0$P1; S2 = C1$P2; S3 = C2$P3; END Number of P-terms required to implement equation for C0 = ____
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Unformatted text preview: Number of P-terms required to implement equation for C1 = ____ Number of P-terms required to implement equation for C2 = ____ Number of P-terms required to implement equation for C3 = ____ Number of P-terms required to implement equation for Si = ____ ECE 270 Introduction to Digital System Design Fall 2011 2. [20 points] Draw a circuit that multiplies a 4-bit unsigned binary number X3 X2 X1 X0 by a 3-bit unsigned binary number Y2 Y1 Y0, using an array of full-adder cells. Determine the worst case propagation delay if each full adder takes 10 ns to produce its C and S outputs, and each AND gate (used to generate the product components) has 10 ns of propagation delay. C S X Y Z full adder cell to use X3 X2 X1 X0 × Y2 Y1 Y0 Name: __________________________________________ Class No: __ __ __ __ - __ Signature: ______________________________________ Score: _______ / 40 Your Class No. is the last four digits of your PUID followed by the first character of your last name....
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