BCD Counter:
Binary counters are counters that go through a binary sequence and an n-bit binary
counter is made of “n” number of flip-flops counting from 0 to 2n-1.BCD counters follow a sequence of ten states and count using BCD numbers from 0000 to 1001 and then returns to 0000 and repeats.
So, here in BCD counter, if reset=1, output=0, else if whenever our output is less than or equal to 9, output gets incremented by 1.
Verilog Code for BCD Counter:
module bcd_counter(reset,clk,out);
input reset,clk;
output reg[3:0]out;
initial out=0;
always@(posedge clk)
begin
if (reset)
begin
out<=3'b0;
end
else if(out<=9)
begin
out<=out+1;
end
else
out<=0;
end
endmodule
OUTPUT:
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