?? reginf.v
字號:
// MAX+plus II Verilog Example
// Register Inference
// Copyright (c) 1997 Altera Corporation
module reginf(d, clk, clr, pre, load, data,
q1, q2, q3, q4, q5, q6, q7);
input d, clk, clr, pre, load, data;
output q1, q2, q3, q4, q5, q6, q7;
reg q1, q2, q3, q4, q5, q6, q7;
// Register with active-high Clock
always @(posedge clk)
q1 = d;
// Register with active-low Clock
always @(negedge clk)
q2 = d;
// Register with active-high Clock & asynchronous Clear
always @(posedge clk or posedge clr) begin
if (clr)
q3 = 0;
else
q3 = d;
end
// Register with active-low Clock & asynchronous Clear
always @(negedge clk or negedge clr) begin
if (!clr)
q4 = 0;
else
q4 = d;
end
// Register with active-high Clock & asynchronous Preset
always @(posedge clk or posedge pre) begin
if (pre)
q5 = 1;
else
q5 = d;
end
// Register with active-high Clock & asynchronous Load
always @(posedge clk or posedge load) begin
if (load)
q6 = data;
else
q6 = d;
end
// Register with active-high Clock & asynchronous Clear & Preset
always @(posedge clk or posedge clr or posedge pre) begin
if (clr)
q7 = 0;
else if (pre)
q7 = 1;
else
q7 = d;
end
endmodule
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