Patent attributes
A master-slave system and a data transmission method thereof are provided. The master-slave system includes a slave device and a master device. The master device is coupled to the slave device via a power line. The master device outputs a voltage signal to the slave device via the power line. In a first period, the master device outputs the voltage signal subject to a first voltage level change to the slave device based on first data via the power line, so that the slave device obtains the first data based on the first voltage level change. In a second period, the slave device changes load of the power line based on second data, so that the voltage signal on the power line is subject to a second voltage level change. The master device obtains the second data based on the second voltage level change.
