Abstract: A counting method adapted to count the stage number of an integrated circuit is provided herein. The counting method includes selecting an initial segment on a graphical user interface; determining whether the initial segment is floating; when it is determined that the initial segment is coupled to a first device, storing the first device in a device register; increasing the stage number by 1 to be a first stage number corresponding to the first device; storing all segments coupled to the first device except the initial segment in a first coupling register; selecting a first segment from the first coupling register; determining whether the first segment is floating; and when it is determined that the first segment is not floating, displaying the first stage number at the first segment on the graphical user interface.

Abstract: A pulse width modulation (PWM) driving device for generating a driving signal to a load is provided. A driving unit provides the driving signal according to a PWM signal and a control signal. A pulse generating unit generates the PWM signal according to a feedback signal from the load. A control unit generates the control signal according to an enable signal and the feedback signal. The control unit generates the control signal to control the driving unit to stop outputting the driving signal when the enable signal is at a first logic level and the feedback signal is smaller than a first predetermined voltage during a first time interval. The control unit generates a reset signal to reset the driving unit and the pulse generating unit when the enable signal is at a second logic level during a second time interval.