题解 | #异步复位同步释放#
异步复位同步释放
https://www.nowcoder.com/practice/9b892b6f75954267b4574b042f8a8d6a
`timescale 1ns/1ns module ali16( input clk, input rst_n, input d, output reg dout ); reg rst_n0, rst_n1; // 异步复位，同步释放 //*************code***********// always@(posedge clk or negedge rst_n) begin // 打两拍，来消除 亚稳态 if(!rst_n) begin rst_n0 <= 0; rst_n1 <= 0; end else begin rst_n0 <= rst_n; rst_n1 <= rst_n0; end end always@(posedge clk or negedge rst_n1) begin if(!rst_n1) dout <= 0; else dout <= d; end //*************code***********// endmodule
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