Title:
INTERFACE CIRCUIT, AND STATE SWITCHING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/024725
Kind Code:
A1
Abstract:
The present invention relates to the technical field of terminals, and in particular, to an interface circuit, and a state switching method and device. The interface circuit comprises: a power management integrated circuit (PMIC) (210), a universal serial bus (USB) controller (220), an integrated circuit (IC) (230), and a USB interface (240). A pin ID1 of the PMIC (210) and a pin ID2 of the IC (230) are mutually connected. A pin CC1 of the IC (230) and a pin CC2 of the USB interface (240) are mutually connected. A data pin of the USB controller (220) and a data pin of the USB interface (240) are mutually connected. In a master-to-slave switching state, the pin ID2 and the pin CC1 of IC (230) are disconnected, and the pin ID2 is set to be a high voltage level, and the pin CC1 is set to be a low voltage level. In a slave-to-master switching state, the pin ID2 and the pin CC1 of IC (230) are disconnected, and the pin ID2 is set to be the low voltage level, and the pin CC1 is set to be the high voltage level. In a non-switching state, the pin ID2 and the pin CC1 of IC (230) are connected.
Inventors:
FENG WEI (CN)
TAO JUN (CN)
LI GUOSHENG (CN)
TAO JUN (CN)
LI GUOSHENG (CN)
Application Number:
PCT/CN2015/098944
Publication Date:
February 16, 2017
Filing Date:
December 25, 2015
Export Citation:
Assignee:
XIAOMI INC (CN)
International Classes:
G06F13/40
Foreign References:
| CN104239240A | 2014-12-24 | |||
| CN101359316A | 2009-02-04 | |||
| CN101901201A | 2010-12-01 | |||
| JP2005287278A | 2005-10-13 | |||
| JP2006099354A | 2006-04-13 | |||
| US8447890B1 | 2013-05-21 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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