The order of commands in the input is important. The model commands are model, parameter, and transistor. Circuit commands Used to input and describe the circuit being analyzed. The circuit commands are build, bus, capacitance, inputs, outputs, and resistance. This group includes the single command markdynamic, used to find and mark the dynamic memory nodes in the circuit.
Check commands Includes two commands, check, and ratio.
Setup commands There are three commands in this group, flow, precharged, predischarged, and set. These commands are used to restrict the analysis performed for a given clock phase. The delay command invokes the actual delay analysis. The only command outside these groups is the clear command, which resets information that was set by setup and delay commands. After clear, input may resume with anything except model commands.