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;
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;
举一反三
- 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;
- 定义状态机当前状态为state ,次态为next _state; 输入a,输出b, 则下列为Mealy状态机的写法是: A: always@(posedge clk)case (state )0:next_state<=1;1:next_state<=x; B: always@(posedge clk)case (state )0: if(a==0)next_state<=1; else next_state<=x;1:next_state<=x; C: always@(posedge clk)case (state )0: if(state==0)next_state<=1; else next_state<=x;1:next_state<=x; D: 以上都是正确的
- 以下的描述中,必然是对Mealy型状态机的描述的是? A: always@(*)case(state)S0:beginout=0;if(in)next_state=S1;elsenext_state=S2;end…… B: always@(*)case(state)S0:beginif(in)next_state=S1;elsenext_state=S0;end…… C: always@(*)case(state)S0:beginif(in)beginnext_state=S1;out=1endelsenext_state=S0;end…… D: 以上答案均不正确
- 下列Verilog HDL代码描述中,采用时钟信号clock上升沿和复位信号reset下降沿触发的是( )。 A: always @ ( posedge clock, negedge reset ) if ( reset ) B: always @ ( posedge clock, negedge reset ) if ( ! reset ) C: always @ ( clock, reset ) if ( reset ) D: always @ ( posedge clock or negedge reset ) if ( reset==0 )
- 关于上面的display 信息描述正确的是() [R1]display interface g0/0/0 GigabitEthernet0/0/0 current state:Administratively DOWN Line protocol current state:DOWN