Accessory and host battery synchronization

摘要

A portable electronic device that can receive power from an internal power source (such as a battery) and/or a second portable electronic device is described. In order to coordinate the power availability in these portable electronic devices, a power-management mechanism in the portable electronic device (which may be implemented in hardware and/or software) may determine a power state of an internal power source in the second portable electronic device, and may accordingly adjust a power consumption by circuits in the portable electronic device and/or the power received from the second portable electronic device. In this way, the power-management mechanism may approximately synchronize the power consumption in the portable electronic devices and/or the power states of the internal power sources in the portable electronic devices. This approximate synchronization may facilitate concurrent operation of the portable electronic devices.

主权项

1. A first portable electronic device, comprising:
a first power source configured to supply power to circuits in the first portable electronic device; an interface circuit configured to communicate with and receive power from a second portable electronic device; and a power-management mechanism configured to: monitor a power state of the first power source; manage power consumption by the circuits in the first portable electronic device; determine, via the power-management mechanism in the first portable electronic device, a second power state of a second power source in the second portable electronic device; and via the power-management mechanism, separately adjust based on the first and second power states,
a power consumption of circuits in the first portable electronic device,a power consumption of circuits in the second portable electronic device,a power received by the first portable electronic device from the second portable electronic device, anda power sent from the first portable electronic device to the second portable electronic device.