Patent ID: 8607036

Claim:
A power management integrated circuit for managing power supply of a device comprising: an internal non-volatile memory for storing boot settings for the power management integrated circuit; a data interface for connecting to an external source of boot settings; and control circuitry adapted to, when boot settings are required by the power management integrated circuit, in the event that an external source of boot settings is operably connected to the data interface, provide one or more boot configuration settings from the external source of boot settings in preference to any corresponding boot settings stored in the internal non-volatile memory; and in the event that no external source of boot settings is operably connected to the data interface, provide any boot settings stored in the internal non-volatile memory, said power management integrated circuit being configured to, in use, receive power from a power supply and provide regulated power to at least one power domain of a host device, wherein the control circuitry is adapted to determine whether the internal non-volatile memory has been programmed with boot settings and, in the event that an external source of boot settings is not operably connected, to prevent a start-up sequence from occurring if the internal non-volatile has not been programmed with boot settings.