 | This text/reference provides students and practicing engineers with an introduction to the classical methods of designing electrical circuits, but incorporates modern logic design techniques used in the latest microprocessors, microcontrollers, microcomputers, and various LSI components. The book provides a review of the classical methods e.g., the basic concepts of Boolean algebra, combinational logic and sequential logic procedures, before engaging in the practical design approach and the use of computer-aided tools. The book is enriched with numerous examples (and their solutions), over 500 illustrations, and includes a CD-ROM with simulations, additional figures, and third party software to illustrate the concepts discussed in the book. |
TABLE OF CONTENTS Digital Principles & Logic Design
Section 6.6 - Registered PAL Ddvices
Flip-flops are employed in sequential digital circuits in addition to the combinational circuits, and therefore for the design of sequential circuits, PALs have been developed with flip-flops in the outputs. These devices are referred to as registered PALs. The flip-flops are all controlled by a common clock and another dedicated input pin is provided for output ENABLE control of INVERTERs.
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