2 Verilog HierarchyEach design identifier creates a new branch of the hierarchy tree
3 Tristate Signals and Busses Tristate busses are allowed by most FPGA architectures on devices output pinsIf tristate are not allowed, the synthesis may have control to automatically substitutes with MUXes
17 State AssignmentMake a big difference in how efficiently your logic will be synthesizeuse parameters, ‘define and ‘ifdef to select between encoding assignments
18 State AssignmentOne-hot state assignment means that each state is assigned a single state flip-flop which is active only in the assigned stateOne-could state assignment means that a flip-flop is inactive only in the assigned state
19 Adders Half-AdderThe synthesis tool will examine each instance of the operator and will try to implement the logic with a preoptimized module
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