A MOBILE DEVICE FOR A UNIVERSAL SERIES (USB) BUS CHARGER.

摘要

A mobile device (400) comprising: a communications subsystem (428) connected to a microprocessor (420); a controller (in Universal Serial Bus) USB (414) connected to the microprocessor (420); a load subsystem (416) connected to the microprocessor (420); a battery (418) connected to the charging subsystem (416); a USB interface (412) connected to the USB controller (414) and the charging subsystem (416), in which the USB interface (412) is configured to receive power from a USB charger (110); in which the USB controller (414) is configured to detect the presence of a USB charger (110) by identifying a configuration signal (115) of the charger carried in a D + line and in a D- line, and in which the controller USB (414) also determines the operational characteristics of the USB charger (110) from the waveform characteristics of the configuration signal (115) of the charger on the D + and D- lines, and in which the D + and D- they are continuously either both in a high logical state or both in a low logical state; characterized in that: the charger configuration signal is a periodic digital signal that has a preselected frequency and duty cycle, and the USB controller (414) is configured to identify the operating characteristics of the USB charger (110) from the frequency and of the service cycle of the charger configuration signal; and applies an output of the USB charger to recharge the battery, and in which the operational characteristics include, at least, the values of a regulated voltage and a maximum current capacity of the output of the USB charger.