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based on Verilog-HDL hardware Circuit of 9.4 pulse frequency measurement and display 9.4.1 pulse frequency measurement frequency 9.4.2 principle, the principle 9.4.3 Frequency Measurement Module Design and Implementation 9.4.4 cycle statement while the use 9.4.5 gating signal occurred Module Design and Implementation 9.4.6 frequency of Verilog-HDL description 9.4. 7 frequency of hardware