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ECE 564 (001) Fall 2025 ASIC and FPGA Design with Verilog
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Which statement best describes the main purpose of inserting scan chains into a design?
The code fragment is likely to implement unintended latches?
always@(posedge clock)
state <= next_state;
always@(state or A)
begin
out = 0;
case (state)
0 : if (A) begin
out = 1;
next_state = S0;
end
else next_state = S1;
1 : next_state = S0;
end
Assuming the code in the question above is synthesizable, what is the code doing?
Is the following code fragment, that of a Mealy or Moore machine?
always@(posedge clock)
state <= next_state;
always@(state or A)
begin
out = 0;
case (state)
0 : if (A) begin
out = 1;
next_state = S0;
end
else next_state = S1;
1 : next_state = S0;
end
Is this a valid, synthesizable, use of a for loop?
reg [8:0] A, B;
integer i;
parameter N=8;
always@(B)
begin
for (i=1; i<=N; i=i+1)
A[i-1]=B[i];
A[N] = A[N-1];
end
You have to build a part that has numerous 256 Mbps inputs and you are required to perform real time processing on them. The volume is high. Which implementation style would you choose?
What is wrong with the following code fragment (note the use of non-blocking assignment)?
always@(A or B or C)
begin
E <= C | B;
F <= E ^ A;
end
What are the TWO things wrong with the following code fragment?
always@(A orB or C)
begin
F = A & C;
A = F | B;
end
always@(B or D)
begin
F = D ^ B;
end
Would you expect to achieve a 1 GHz clock with an FPGA?
What is wrong with the following code fragment?
always@(A or C)
D = A & C;
always@(posedge clock)
if (B) E <= C;