Riches do not always bring_______. A.decayB.contentmentC.complaintD.destruction
Riches do not always bring_______.
A.decay
B.contentment
C.complaint
D.destruction
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2、选出正确的触发器描述A.module D_FF (input D,Clock, output reg Q); always@(Clock,D) Q <= D; endmoduleB.module D_FF (input D,Clock, output reg Q); always@(posedge Clock) Q <= D; endmoduleC.module D_FF (input D,Clock, output reg Q); always@(negedge Clock) Q <= D; endmoduleD.module D_FF (input D,Clock, output reg Q); always_ff@(posedge Clock) Q <= D; endmoduleE.module D_FF (input D,Clock, output reg Q); always_ff Q
关于always过程块的说法正确的是()。A.always语句主要用于对硬件电路的行为功能进行描述,不能用在仿真测试模块中。B.只要敏感事件表中的事件发生变化就会执行always语句块。C.在always块中,当过程赋值语句有两条语句时可以不用begin end界定。D.在always块中的过程赋值语句中,赋值符号左边的变量必须被定义成寄存器类型。
10、在过程赋值语句always语句块里赋值,称为过程赋值,always@ 后面的括号里是敏感列表,如下用持续赋值语句描述了一个异或门电路,与它等价的过程赋值语句是() input wire a,b; output wire c; assign c = a^b;A.input wire a,b; output reg c; always@(a,b) assign c = a^b;B.input wire a,b; output wire c; always@(a and b) assign c = a^b;C.input wire a,b; output reg c; always@ * assign c = a^b;D.input wire a,b; output logic c; always_comb assign c = a^b;
1、选出正确的锁存器描述A.module Latch (input D,E, output reg Q); always_latch if(E) Q=D; endmoduleB.module Latch (input D,E, output reg Q); always@(E or D) if(E==1) Q=D; else Q=Q; endmoduleC.module Latch (input D,E, output reg Q); always@(E or D) if(E==1) Q=D; endmoduleD.module Latch (input D,E, output reg Q); always@(E or D) if(E==1) Q=D; else Q=0; endmodule
3、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)
下列描述中采用时钟clk正边沿触发且rst异步低电平复位的代码描述是A.always @ (posedge clk, negedge rst) if (rst)B.always @ (posedge clk, rst) if (!rst)C.always @ (posedge clk, negedge rst) if (!rst)D.always @ (negedge clk, posedge rst) if (rst)
ADC 0809采样结束后需要通过LOCK向锁存器LATCH发出锁存信号,以便将输出口的D[7:0]8位数据锁存起来,下列程序当中能够实现数据锁存功能的是()A.always@(posedge LOCK) if (LOCK) REGL<=D;B.always@(posedge LOCK) if (!LOCK) REGL<=D;C.always@(posedge RST) if (!LOCK) REGL<=D;D.always@(posedge RST or posedge LOCK ) if (!LOCK) REGL<=D;