下列哪一个表述是正确：
A: always@(posedge CLK or RST)
B: always@(posedge CLK or negedge RST or A)
C: always@(posedge CLK or D or Q)
D: always@(posedge CLK or negedge RST)
A: always@(posedge CLK or RST)
B: always@(posedge CLK or negedge RST or A)
C: always@(posedge CLK or D or Q)
D: always@(posedge CLK or negedge RST)
举一反三
- 下列哪一个表述是正确： A: always@(posedge CLK or RST) B: always@(posedge CLK or negedge RST or A) C: always@(posedge CLK or D or Q) D: always@(posedge CLK or negedge RST)
- 下列敏感信号的表示属于边沿敏感型的是________ A: always@(posedge clk or posedge clr) B: always@(A or B) C: always@(posedge clk or clr) D: always @ (*)
- 要实现异步复位(低电平有效)、时钟使能(高电平有效)、上升沿触发的D触发器设计：module dff_s (data,rst,en,clk,q);input data,rst,en,clk;output reg q;always (1) begin if( 2 ) q<=1'b0;; else if (3) q<=data;endendmodule（1）应该填写（ ）。 A: @(posedge clk ) B: @(posedge clk or posedge rst or en) C: @(posedge clk or negedge rst) D: @(posedge clk or negedge rst or en)
- 下列Moore型状态机采用Verilog语言主控时序部分正确的是： A: always@(posedge clk or negedge reset) begin if(!reset) current_state<=s0; else current_state<=next_state; end B: always@(posedge clk ) begin if(!reset) current_state<=s0; else current_state<=next_state; end C: always@(posedge clk t) if(reset) current_state<=s0; else current_state<=next_state; D: always@(posedge clk or negedge reset) if(reset) current_state<=s0; else current_state<=next_state;
- 下列Moore型状态机采用Verilog语言主控时序部分正确的是： A: always@(posedge clk or negedge reset) begin if(!reset) current_state<=s0; else current_state<=next_state; end B: always@(posedge clk ) begin if(!reset) current_state<=s0; else current_state<=next_state; end C: always@(posedge clk t) if(reset) current_state<=s0; else current_state<=next_state; D: always@(posedge clk or negedge reset) if(reset) current_state<=s0; else current_state<=next_state;