9. Programmable Logic Devices - Part B
This chapter covers the principles and applications of Programmable Logic Devices (PLDs), specifically focusing on Programmable Logic Arrays (PLAs) and Programmable Array Logic (PAL) devices. It discusses their architectures, functionalities, and how to implement logic circuits using these devices. Key examples illustrate the design of specific logic functions, showcasing simplifications and optimizations in Boolean expressions.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- PLAs allow for flexible implementation of Boolean functions with programmable AND and OR arrays.
- PALs have programmable AND gates but fixed OR gates, making them less flexible but simpler.
- Karnaugh maps can be used to minimize Boolean functions for implementation in PLDs.
Key Concepts
- -- Programmable Logic Array (PLA)
- A digital device that implements combinational logic by using a programmable AND array and a programmable OR array to configure logic functions.
- -- Programmable Array Logic (PAL)
- A type of PLD that features a programmable AND array followed by a fixed OR array, allowing for easier implementation at the cost of flexibility.
- -- Karnaugh Map
- A method for minimizing Boolean expressions by visually organizing truth values to identify simplifications.
- -- Boolean Expression
- An algebraic expression formed using binary variables, constants, and logical operations.
Additional Learning Materials
Supplementary resources to enhance your learning experience.