5 Fill in the following timing diagram for a rising-edge-triggered T flip-flop with an asychronous active-low PreN input. Assume Q begins at 1. Clock PreN T.

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### Timing Diagram for a T Flip-Flop

**Exercise 11.25**

**Instructions:** Fill in the following timing diagram for a rising-edge-triggered T flip-flop with an asynchronous active-low PreN input. Assume \( Q \) begins at 1.

**Diagram Explanation:**

- **Clock:** The uppermost waveform represents the clock signal, which shows periodic rising and falling edges. The rising edge is the active edge for the T flip-flop.

- **PreN:** The second waveform is the PreN (Preset) signal. This input is asynchronous and active-low. It shows a brief low state, indicating when the preset condition is activated, forcing \( Q \) to 1 regardless of the clock or T input state.

- **T (Toggle):** The third waveform is the T (Toggle) input. When high during a clock rising edge, it causes \( Q \) to toggle its state.

- **Q (Output):** The final waveform at the bottom represents the output \( Q \). The exercise asks you to determine the changes in \( Q \) based on the given signals. It starts at 1 and toggles with each active clock edge when T is high and PreN is not activating the preset condition.

### Exercise Objective:
Understand and fill out the waveform for the output \( Q \) based on active edges given the asynchronous PreN and the T (toggle) input.
Transcribed Image Text:### Timing Diagram for a T Flip-Flop **Exercise 11.25** **Instructions:** Fill in the following timing diagram for a rising-edge-triggered T flip-flop with an asynchronous active-low PreN input. Assume \( Q \) begins at 1. **Diagram Explanation:** - **Clock:** The uppermost waveform represents the clock signal, which shows periodic rising and falling edges. The rising edge is the active edge for the T flip-flop. - **PreN:** The second waveform is the PreN (Preset) signal. This input is asynchronous and active-low. It shows a brief low state, indicating when the preset condition is activated, forcing \( Q \) to 1 regardless of the clock or T input state. - **T (Toggle):** The third waveform is the T (Toggle) input. When high during a clock rising edge, it causes \( Q \) to toggle its state. - **Q (Output):** The final waveform at the bottom represents the output \( Q \). The exercise asks you to determine the changes in \( Q \) based on the given signals. It starts at 1 and toggles with each active clock edge when T is high and PreN is not activating the preset condition. ### Exercise Objective: Understand and fill out the waveform for the output \( Q \) based on active edges given the asynchronous PreN and the T (toggle) input.
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