1. SYEN 3330 Digital SystemsJung H. Kim Chapter 3 1 SYEN 3330 Digital Systems Chapter 3

2. SYEN 3330 Digital Systems Chapter 3 Page 2 Design Hierarchy

3. SYEN 3330 Digital Systems Chapter 3 Page 3 Hierarchical Design

4. SYEN 3330 Digital Systems Chapter 3 Page 4 Reusable Functions and Design

5. SYEN 3330 Digital Systems Chapter 3 Page 5 Top-Down verses Bottom Up

6. SYEN 3330 Digital Systems Chapter 3 Page 6 Analysis Procedure

7. SYEN 3330 Digital Systems Chapter 3 Page 7 Analyze the network below F A B' C D' B E' T1T1 T2T2

8. SYEN 3330 Digital Systems Chapter 3 Page 8 Analysis (Continued) F A B' C D' B E' T1T1 T2T2 T3T3 F A B' C D' B E' T1T1 T2T2 T4T4 T3T3 T 3 =D’+T 2 T 4 =T1  T 3 F = A+T 4

9. SYEN 3330 Digital Systems Chapter 3 Page 9 Analysis (Continued) F A B' C D' B E' T1T1 T2T2 T4T4 T3T3

10. SYEN 3330 Digital Systems Chapter 3 Page 10 Analyze the Code Converter w x y z A B C D F1F1 F2F2 F0F0

11. SYEN 3330 Digital Systems Chapter 3 Page 11 Code Converter (Cont.)

12. SYEN 3330 Digital Systems Chapter 3 Page 12 Truth Tables from Diagrams

13. SYEN 3330 Digital Systems Chapter 3 Page 13 Code Converter Truth Table

14. SYEN 3330 Digital Systems Chapter 3 Page 14 Truth Table Fill-In

15. SYEN 3330 Digital Systems Chapter 3 Page 15 Finish Up Entries

16. SYEN 3330 Digital Systems Chapter 3 Page 16 What Does the Circuit Do?

17. SYEN 3330 Digital Systems Chapter 3 Page 17 Final Note (and warning)

18. SYEN 3330 Digital Systems Chapter 3 Page 18 Logic Design: Functional Blocks

19. SYEN 3330 Digital Systems Chapter 3 Page 19 Review Combinatorial Logic

20. SYEN 3330 Digital Systems Chapter 3 Page 20 Design Procedure

21. SYEN 3330 Digital Systems Chapter 3 Page 21 Code Converter Design

22. SYEN 3330 Digital Systems Chapter 3 Page 22 Example: BCD to Excess 3 Note: All BCD codes greater than "9" can be assigned "Don't Cares" in the K-Map. Such BCD codes are never possible.

23. SYEN 3330 Digital Systems Chapter 3 Page 23 Example (Cont.): BCD to Excess 3 Minimized Equations: z = D ' y=C  D + C '  D ' (exnor) x=B '  C + B '  D + B  C '  D ' w = A + B  C + B  D

24. SYEN 3330 Digital Systems Chapter 3 Page 24 BCD to Excess 3 Implementation

25. SYEN 3330 Digital Systems Chapter 3 Page 25 BCD to Excess 3