Consider the state machine below: CLK B' A' A B' J. B B A a) Is this a Moore or a Mealy machine? b) Find the next-state equations and output equation. B X N
Consider the state machine below: CLK B' A' A B' J. B B A a) Is this a Moore or a Mealy machine? b) Find the next-state equations and output equation. B X N
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:### State Machine Analysis
**Description:**
The figure depicts a state machine circuit. It consists of two JK flip-flops and logic gates that determine the behavior of the machine. The state machine is driven by a clock signal labeled `CLK`.
**Components:**
1. **JK Flip-Flops:**
- **Flip-Flop (A):** Inputs are `J_A` and `K_A`. Outputs are `A` and `A'`.
- **Flip-Flop (B):** Inputs are `J_B` and `K_B`. Outputs are `B` and `B'`.
2. **Logic Gates:**
- **AND Gates:** Two AND gates are present:
- The first AND gate takes inputs `A` and `X`, and outputs to `J_B`.
- The second AND gate takes inputs `B'` and `X`, and outputs to `J_A`.
- **OR Gate:** Takes inputs `B` and `X`, and outputs to a NOT gate, which produces output `Z`.
**Questions:**
a) **Determine the Type of Machine:**
- **Moore Machine:** Outputs depend only on the current state.
- **Mealy Machine:** Outputs depend on the current state and the current inputs.
- Given that `Z` depends on both `B` and `X`, this is a **Mealy machine**.
b) **Find the Next-State Equations and Output Equation:**
- **Next-State Equations:**
- `J_A = B'X`
- `K_A = 0` (not explicitly provided, implied by absence of connections)
- `J_B = AX`
- `K_B = 0` (not explicitly provided, implied by absence of connections)
- **Output Equation:**
- `Z = B + X`
This setup describes how the state transitions and output logic are determined by the circuit configuration.
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