Here's an example Verilog code to implement a JK flip-flop circuit:
module jk_ff (output reg q, input j, k, clk, reset);
always @(posedge clk, negedge reset) begin
if (!reset) begin
q <= 1'b0;
end
else begin
if (j && !k) begin
q <= 1'b1;
end
else if (!j && k) begin
q <= 1'b0;
end
else if (j && k) begin
q <=
q;
end
end
end
endmodule
This code defines a module called “jk_ff” that implements a JK flip-flop. The output “q” is a registered output, which means that it is updated only on clock edges. The inputs “j” and “k” are the inputs to the flip-flop, and “clk” is the clock input. The “reset” signal resets the flip-flop to 0.
The “always @(posedge clk, negedge reset)” block is a sequential logic block that updates the “q” output based on the clock and reset signals. If the “reset” signal is low, then the flip-flop is reset to 0. Otherwise, the flip-flop behaves according to the JK flip-flop truth table:
– If J is high and K is low, then the flip-flop sets to 1 on the positive edge of the clock.
– If J is low and K is high, then the flip-flop resets to 0 on the positive edge of the clock.
– If both J and K are high, then the flip-flop toggles its output on the positive edge of the clock.
Note that this Verilog code assumes that the “q” output and the “j”, “k”, “clk”, and “reset” signals are all 1-bit signals. If you want to use multi-bit signals, you would need to modify the code accordingly. Additionally, this code implements a rising-edge triggered flip-flop. If you wanted to implement a falling-edge triggered flip-flop, you would need to modify the code accordingly.