![]() Therefore, we prefer the highest level of abstraction (behavioral modeling) for describing sequential circuits. And not as an authentic flip-flop that triggers on clock edges. Hence, the dataflow model of SR flip flop will work only as a latch. When we use a conditional operator, the statement is not executed at the clock edges(HIGH to LOW or LOW to HIGH) but the clock level(HIGH and LOW). Kudos to you if you’ve caught it.įlip flops are edge-triggered circuits. POSITIVE EDGE TRIGGERED FLIP FLOP IN VERILOG CODEHence, our final code will be: module srff_dataflow(q,qbar,s,r,clk) īut…there’s a problem. Then, we move on to write the continuous assignment using keyword assign assign q = clk ? (s + ((~r)&q)) : q Starting with the module declaration and port declaration: module srff_dataflow(s,r,clk,q,qbar) Let’s see how we code in this equation using dataflow modeling. This style describes how data flows from input to output using logic equations.īefore moving on to the coding part, let’s see the characteristic equation of the SR flip flop: For that, we use a higher level of abstraction, which is Dataflow modeling. Instead of knowing the logic circuit, we can describe the circuit using its logic expression. ![]() Hence, it becomes challenging to instantiate a large number of gates and interconnections. But, when the number of logic gates increases, the circuit complexity increases. Gate level modeling works for circuits having less number of logic gates. ![]() In that order.įinal code: module srff_gate(q, qbar, s, r, clk) nand (nand1_out,clk,s) //this is the first nand gate described with its output and inputs. Time for us to instantiate the gate primitives. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |