Driving 7-Segment Display from 200Hz Clock Signal

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SUMMARY

The discussion focuses on driving a 7-segment display using a 200Hz clock signal derived from a 500MHz source. The input clock signal must be declared as an input in the display module, and it should be utilized within an always block (i.e., always(@posedge clk)) to ensure proper synthesis as a clock signal. A flip-flop can be employed as a 2-output counter to cycle through the 4 multiplexed segments, although there is a minor risk of race hazards at these frequencies.

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  • Familiarity with Verilog or VHDL for hardware description
  • Knowledge of flip-flops and their operation in digital circuits
  • Experience with multiplexing techniques for display systems
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david90
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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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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.
 
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
 

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