Question

1) ALU Design: Carry-Select Adder EEL 380 Given: A4-bit adder is implemented in a carry ripple style as shown in the figure below. B3 A3 B2 A2 B1 A1 **** c0='1' Sought: Please calculate the output carries for each full adder (FA) using A=0x01 and B=0x04. It is required to show ALL incremental steps of the solution, then record each the final results in the table below. C4 C3 C2 ci

Answer 1

tareth table Addition Full with addenn Cin Caroly Sum for A B Casisly O O อ a O b o- - 0 ) 0 0 1 1 Sum A B A Cin fool A+B 1 of in Canary AB + BG + CA Chad

B2 Az B2 An Bi A1 Bo to C3 c) FA FA FA FA 53 S22 SI so Given A = OXO) = 0001 Az = 0, Ag= 0, A1 = 0, AO = 1 B = Ox04 = 0100 B3=0, Bgal, Bi=O) Bo=0 So = A Bo 6 co = 10001 = 0 a= Ao Bot Bocot Coto Otot I G = 1 SI = AIO BOCIE | C2 = A Bit BICH CIAI = 0+0+0 C=0 3 = A2 Br + B2 Cz + C2 AD ototo C2=0 cy= A3 B₂ + B3 C3 + C3 A3 - ototo cy=0

Cy C3 C2 C