Signal slope control system and method

The invention relates to a signal slope control system and method. The system comprises a main control chip, a level output circuit, a driver circuit and a time adjustment circuit. The method comprises the following steps that the main control chip sends a control signal to the level output circuit and sends an enable signal to the driver circuit; the level output circuit outputs a high level to the driver circuit according to the control signal of the main control chip; when the enable signal output by the main control chip is received and the high level output by the level output circuit isreceived, the driver circuit outputs a pull-up voltage to the time adjustment circuit; and the time adjustment circuit receives the pull-up voltage and adjusts rise time of an open-drain bus by changing a resistance value. Compared with the prior art, the technical scheme has the beneficial effects that the signal slope can be adjusted according to different slave devices to match with an optimalsignal rate; and the flexi