Programmable stepper motor controller provides a digital monostable circuit, which generates a control signal. The control signal indicates a field coil within a motor, which is to be turned on or off. Two registers are provided within the digital monostable to store values that indicates a fixed off time and a minimum on time. These registers are loaded with selected values by a microprocessor. The stored values are loaded into a counter. The values in the off time and minimum on time registers are changed to suit operating conditions of the system. It is operated in open loop mode.