What is the recommended best practice for using blocking =) and non-blocking <=) assignments in Verilog HDL to avoid race conditions and ensure correct synthesis of hardware?
The standard guideline is to use non-blocking assignments <=) when modeling sequential logic (e.g., in an always @(posedge clk) block) to correctly model the behavior of flip-flops where all outputs are updated simultaneously at the clock edge. Blocking assignments =) should be used for combinational logic (e.g., in an always @(*) block) to model the immediate, level-sensitive propagation of logic values. Following this rule prevents simulation race conditions and ensures the synthesized hardware matches the intended behavior.
