Driving 7-Segment Display from 200Hz Clock Signal

In summary, the question is how to input a clock module signal into a 7segment display module that uses the clock signal to cycle through 4 segments. Warren suggests using a flip flop as a 2 output counter, but there is a slight risk of race hazards at these frequencies. David90 explains that the clock should be declared as an input and used in an always block to indicate it is a clock.
  • #1
david90
312
2
I have a clock module that divides a 500mhz signal to a 200hz signal, and another module that is suppose to use the 200hz clk signal to drive 4 multiplexed 7segment display. My question is how do I input the clock module signal into the 7segment display module?
 
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  • #2
What is the "another module" doing? Is it using the 200hz to cycle the 4 seg's?

If so i'd use a flip flop as a 2 output counter (using Q and clk). Slight risk of race hazards but affordable at these frequencies.
 
  • #3
david90,

The clock enters the module like any other signal. It should be declared as an input. If you use the signal as the argument in an always block (i.e. always(@posedge clk)), the synthesizer will know it's a clock. You do not have to do anything special to declare that an input signal is a clock; it's a clock if you use it as a clock.

- Warren
 

Related to Driving 7-Segment Display from 200Hz Clock Signal

1. How do I connect a 7-segment display to a 200Hz clock signal?

To connect a 7-segment display to a 200Hz clock signal, you will need to use a decoder and a multiplexer. The decoder will convert the binary data from the clock signal into a 7-segment display compatible format, and the multiplexer will select which segment of the display to light up at a given time. You will also need to connect power and ground to the display, as well as any additional control signals.

2. What is the purpose of using a 200Hz clock signal to drive a 7-segment display?

A 200Hz clock signal is commonly used to drive a 7-segment display because it allows for a smooth and continuous display of numbers or characters without any noticeable flickering. This frequency is also high enough to ensure that the display is updated quickly and accurately.

3. Can I use a different clock signal frequency to drive a 7-segment display?

Yes, you can use a different clock signal frequency to drive a 7-segment display. However, it is important to consider the refresh rate and the capabilities of the display. A higher frequency may result in a smoother display, but it may also require more complex circuitry and may not be compatible with all types of 7-segment displays.

4. How do I troubleshoot if my 7-segment display is not working with a 200Hz clock signal?

If your 7-segment display is not working with a 200Hz clock signal, the first step is to check all connections and ensure that the power and ground are properly connected. You should also double-check the wiring and the code used to drive the display. If these steps do not resolve the issue, there may be a problem with the display itself or the clock signal source.

5. Can I use a 200Hz clock signal to drive multiple 7-segment displays?

Yes, a 200Hz clock signal can be used to drive multiple 7-segment displays by using a multiplexer to select which display to update at a given time. However, as the number of displays increases, the refresh rate may decrease, resulting in a less smooth display. It is important to consider the capabilities of the clock signal and the circuitry when using multiple displays.

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