Question
What is the need of clocking blocks ?
Answers
It is used to specify synchronization characteristics of the design
It Offers a clean way to drive and sample signals
Provides race-free operation if input skew > 0
Helps in testbench driving the signals at the right time
 Features

                  - Clock specification                  - Input skew,output skew                  - Cycle delay (##)

Can be declared inside interface,module or program

Example :
01.Module M1(ck, enin, din, enout, dout);02.input         ck,enin;03.input  [31:0] din    ;04.output        enout  ;05.output [31:0] dout   ;06. 07.clocking sd @(posedge ck);08.input  #2ns ein,din    ;09.output #3ns enout, dout;10.endclocking:sd11. 12.reg [7:0] sab ;13.initial begin14.sab = sd.din[7:0];15.end16.endmodule:M1   Your Comment




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