Communication system and electronic device

The invention discloses a communication system and electronic equipment, and relates to the technical field of communication. The communication system comprises a master device and N slave devices. The master device and the slave device are connected through a power management bus, and N is an integer greater than or equal to 1. The slave device is used for pulling down the level of the warning line in the power management bus when an abnormality occurs. Wherein the warning line is at a high level when the N slave devices do not pull down the level of the warning line. The master device is configured to output a broadcast to a data line in the power management bus when the warning line is at a low level. The slave device is also configured to receive the broadcast from the data line. And the slave equipment is also used for executing hardware arbitration when receiving the broadcast, and sending address information to the data line if the arbitration is successful, and stopping lowering the level of the warni