A method for media access control, the method includes generating at least one media access grant in response to at least one media access request. The method further includes monitoring a data line, while maintaining at least a clock line in a low power mode, to detect at least one media access request generated by at least one component connected to the data line and to the clock line; and forcing the at least clock line to exit the low power mode and starting a contention prevention period, when the media access controller or at least one component requests to access the data line. Also disclosed is a device for implementing the method of media access control.