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ECE 564 (001) Fall 2025 ASIC and FPGA Design with Verilog
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What logic function does the following code fragment describe?
always@(posedge clock) begin for (i=8; i>=1; i=i-1) A[i] = A[i-1]; A[0] = In; end
If the input to this logic is In = 4’b0101 which is the correct output?
wire [3:0] out, In;assign out = {&In, In[In[1:0]], {2{In[2]}}};
After the initial compile, you should always use compile –incremental for any further runs that might change the logic.
The constraints specified in the class synthesis script were:
What logic function does the following code fragment describe?
wire [7:0] A, B;wire [15:0] D;wire [2:0] C;assign D = {B,B} << C;assign A=D[15:8];
The primary objective of the Design Compiler synthesis script presented in class is to:
We have to add four numbers (A, B, C, D).Which of the following Verilog fragments will produce the fastest logic?(There is more than one correct answer. You must select both.)
Which of the following statements are most correct?
Which alternative will the following code fragment synthesize to?
reg [3:0] A, B, C;always@(*) C = {{{2{A[3]}},A} >> 1} | {B[3:2],{2{B[0]}}};
Consider the following code. It is the only code in the module.
always@(posedge clock)begin A <= C & D; endalways@(*)E = A+B;If it is synthesized with the following constraints
Create_clock -period 8 -waveform {0 4} –name clockset_clock_skew -uncertainty 1.0 clockset_input_delay 1.0 -clock clock all_inputs() – clockset_output_delay 2.0 -clock clock all_outputs() – clockFlip flop tck-Q delay is 1 ns, setup time is 1 ns, and hold time 1 ns, all logic gate delays vary between 1 and 2 ns.What is the maximum allowed delay for the logic A+B? Give your answer in ns without the units.