Chapter 8 introduces the synchronous design methodology and the construction and coding of synchronous sequential circuits. Basic “regular” sequential circuits, such as counters and shift registers, in which state transitions exhibit a regular pattern, are examined. | Sequential Circuit Design: Principle RTL Hardware Design by P. Chu Chapter 8 1 Outline 1. 2. 3. 4. 5. 6. 7. 8. Overview on sequential circuits Synchronous circuits Danger of synthesizing asynchronous circuit Inference of basic memory elements Simple design examples Timing analysis Alternative one-segment coding style Use of variable for sequential circuit RTL Hardware Design by P. Chu Chapter 8 2 1. Overview on sequential circuit • Combinational vs sequential circuit – Sequential circuit: output is a function of current input and state (memory) • Basic memory elements – D latch – D FF (Flip-Flop) – RAM • Synchronous vs asynchronous circuit RTL Hardware Design by P. Chu Chapter 8 3 • D latch: level sensitive • D FF: edge sensitive RTL Hardware Design by P. Chu Chapter 8 4 RTL Hardware Design by P. Chu Chapter .