The TPS65983B features two I²C slave ports that can be used simultaneously, where the system controller has the ability to write to either of the I²C slave ports. Each I²C port has an I²C interrupt that will inform the system controller that a change has happened in the system. This allows the system controller to dynamically budget power and reconfigures the capabilities of a port dependent on current state of the system. For example, if a battery power contract is established and the system is running low on battery power the system controller could notify the TPS65983B to renegotiate a power contract. The system controller is also used for updating the TPS65983B firmware over I²C, where the Operating System will be able to load the Firmware update to the system controller and then the system controller would be able to update firmware update though I²C.