BitGen accepts text strings of 1's, 0's and hex digits and converts them to equivalent "pwl" voltage sources for inclusion in netlists for circuit simulation . Periodic waveforms can be exported as "pulse" voltage sources. Parameters such as rise time, fall time, pulse width and duty cycle can be set on a waveform-by-waveform basis.

The BitGen program produces a bitstream for Xilinx FPGA device configuration. The BitGen program displays as the Configure step within the Flow Engine.