Computer System Architecture: Understanding State Tables/Diagrams

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State tables and diagrams are essential for understanding the behavior of systems with flip-flops, particularly in computer system architecture. The discussion focuses on creating a state table for two flip-flops, Da and Db, with inputs x and y, and output z. It highlights that the table begins with a present state, which can be confusing for learners. The concept of including the previous state as an independent input is also emphasized, indicating that three inputs are involved in the process. Clarifying these elements is crucial for mastering state tables and their applications in digital systems.
EEhokie13
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Hey,
My textbook, Computer System Architecture, by M. Morris Mano, describes state tables/diagrams. After reading over them a few times I am still struggling to understand the concept or actually how they work. For example if you have two flip flops, Da and Db with two inputs, x and y, with one output z how would your make the table?

Da = x(not)y + xA
Db = x(not)B + xA
z = B

I do know that the table starts with a present state, which i think means Da? but I get lost from there. Any help will be great. Thank you!
 
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When you have a stateful object, the previous state is usually shown as an independent input. Therefore you have three inputs, x, y, and previous state.
 

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