OTG detection circuit and mobile terminal with OTG detection circuit
A detection circuit and detection terminal technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of large GPIO pins and misidentified as OTG equipment, etc., to slow down the speed of electrochemical corrosion, reduce voltage, and improve The effect of recognition accuracy
Active Publication Date: 2016-02-03
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
[0003] Then, because the pull-up resistance of the GPIO pin is relatively large, if the GPIO pin has a short resistance to the ground, it is easy to misidentify the insertion of the OTG device, and after the insertion of the OTG device is recognized, there will be a The voltage around 1.8V always exists, thus providing an electric field environment for electrochemical corrosion in a humid environment
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[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0018] The OTG detection circuit proposed according to the embodiments of the present invention and the mobile terminal having the OTG detection circuit are described below with reference to the accompanying drawings.
[0019] figure 1 It is a schematic diagram of an OTG detection circuit according to an embodiment of the present invention. Such as figure 1 As shown, the OTG detection circuit includes a detection terminal 10 , a detection unit 20 , a comparator circuit 30 and a detection chip 40 .
[0020] Wherein, the detecti...
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The invention discloses an OTG detection circuit comprising a detection end which is used for being connected with OTG equipment; a detection unit which is connected with the detection end and used for generating detection voltage when the detection end is connected with the OTG equipment; a comparator circuit of which the input end is connected with the detection unit, wherein the comparator circuit outputs comparison signals according to detection voltage; and a detection chip of which the identification pin of the detection chip is connected with the output end of the comparator circuit, wherein the detection chip identifies whether the detection end is connected with the OTG equipment according to the comparison signals. According to the OTG detection circuit, connection of the OTG equipment is identified by additional arrangement of the comparator circuit so that identification precision is greatly enhanced. The invention also discloses a mobile terminal with the OTG detection circuit.
Description
technical field [0001] The invention relates to the technical field of mobile equipment, in particular to an OTG (On-The-Go) detection circuit and a mobile terminal with the OTG detection circuit. Background technique [0002] In related technologies, the mobile phone OTG detection circuit generally simply uses the GPIO (General Purpose Input / Output) pins of the chip for detection, and only relies on the level changes recognized by the GPIO pins to detect the insertion and removal of the OTG device. [0003] Then, because the pull-up resistance of the GPIO pin is relatively large, if the GPIO pin has a short resistance to the ground, it is easy to misidentify the insertion of the OTG device, and after the insertion of the OTG device is recognized, there will be a The voltage around 1.8V always exists, thus providing an electric field environment for electrochemical corrosion in a humid environment. Contents of the invention [0004] The present invention aims to solve one...
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Inventor 曹磊庄小利
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD