Lab Experiment on Digital Design | ECE 2214, Lab Reports of Digital Systems Design

Download Lab Experiment on Digital Design | ECE 2214 and more Lab Reports Digital Systems Design in PDF only on Docsity!

ECE 2214 LAB EXPERIMENT #4 Build an 8421 BC) Background —~e D adder using MSI [C’s Let us consider the addition of the numbers in 8421 BCD codes. Example 2.6.1 102 495 0100 +278 0010 10! 40° 1001 010% . Ot 1000 773 0110 The BCD sums 10000 and 1101, which are not valid 8421 BCD codes, therefore need to be - corrected as follows: 1 10000 1101 (= 13,9) | (= 16,5) ‘correction required Uncorrected Corrected BCD Sum BCD Sum 1101 ___ to be corrected to -. 10011 ~ LT Nate r 3 e a cary-out 10000 to be corrected to 10110 6: a carry-out With the corrections we have, a & a 107 10" ~=—10° 495 0100 1001 0101 +278 0010 0111 — 1000 7713 0110 10000 1101 (Compute C,: mis wis gs C.=D4etst Dede tC lls gis ss - ws Vs S 0110 10110 10012 eo ys 0111 0111 / “true” xesulis The derivation of: Cy = de 23 + Lp dy +C, (EQN.1) Is shown below. abe pee metas eee NE mE Orem mn we