US 12,316,793 B2
Accessory device, and electronic system and operation method thereof
Kai-Chun Liang, Taipei (TW); Kian Ming Chee, Taipei (TW); Chia-Yu Liu, Taipei (TW); Yii-Lin Wu, Taipei (TW); and Chia-Jui Shih, Taipei (TW)
Assigned to ASUSTeK COMPUTER INC., Taipei (TW)
Filed by ASUSTeK COMPUTER INC., Taipei (TW)
Filed on Aug. 3, 2022, as Appl. No. 17/880,562.
Claims priority of application No. 110130669 (TW), filed on Aug. 19, 2021.
Prior Publication US 2023/0058108 A1, Feb. 23, 2023
Int. Cl. H04M 1/02 (2006.01); H02J 50/12 (2016.01)
CPC H04M 1/026 (2013.01) [H02J 50/12 (2016.02)] 17 Claims
OG exemplary drawing
 
1. An accessory device, comprising:
a functional module;
a first connection interface, configured to be coupled to an external first electronic device;
a second connection interface, configured to be coupled to an external second electronic device;
a switch module, disposed between the first connection interface and the second connection interface, and between the first connection interface and the functional module; and
a microcontroller, coupled to the functional module, the first connection interface, the second connection interface, and the switch module, and configured to control the switch module, so that at least one of the first electronic device, the second electronic device, and the functional module supplies power to at least another one of the first electronic device, the second electronic device, and the functional module,
wherein a power supply voltage (VBUS) pin of the first connection interface is coupled to the second connection interface via a first switch circuit of the switch module; and
the microcontroller outputs a first switching signal to the first switch circuit, and when the microcontroller turns on the first switch circuit, the first electronic device supplies power to the second electronic device via the first switch circuit, or the second electronic device supplies power to the first electronic device via the first switch circuit.