Circuit and method for detecting insertion of USB equipment
A technology for USB interfaces and devices, applied in the field of detecting USB device insertion, can solve problems such as increased energy consumption, inconvenient use, and manual operation of keys, and achieves the effects of saving power, reducing energy consumption, and improving security.
Pending Publication Date: 2022-01-07
CHONGQING DIANGE TECH (GRP) CO LTD
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Problems solved by technology
However, the buttons need to be manually operated, which is not convenient enough to use
[0005] 2. Use a power chip or protocol chip with its own insertion detection function: this method needs to supply power to the power chip or protocol chip, especially the protocol chip requires continuous energy consumption, which increases energy loss
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[0043] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0044] Such as image 3 As shown, the present invention includes a power supply module, an MCU module, a protocol module, an insertion detection module, and a USB interface, wherein:
[0045] The power supply module is respectively connected to the protocol module and the insertion detection module for supplying power to each module. During implementation, the power module can choose a common chip that can be used for USB charging, such as: sc8815, sc8812, etc.
[0046]The protocol module is connected to the USB interface, and is used to identify the charging mode required by the USB device in...
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The invention discloses a circuit and method for detecting insertion of USB equipment. The circuit comprises a power module, an MCU module, a protocol module, an insertion detection module and a USB interface. A communication pin of the power supply module is connected with a communication pin of the protocol module; a D+ pin and a D- pin of the protocol module are respectively connected with a D+ pin and a D- pin of the USB interface; the insertion detection module is respectively connected with an output pin of the power supply module and a VCC pin of the USB interface; an ADC pin of the MCU module is connected with the insertion detection module, and a GPIO pin of the MCU module is connected with an enabling pin of the power supply module and an enabling pin of the protocol module; the insertion detection module is used for detecting the voltage of a resistor R2 connected with the power supply module and the USB interface and sending the voltage to the MCU module; and the MCU module judges whether USB equipment is inserted into the USB interface according to the received voltage value and controls the working states of the power supply module and the protocol module, so that the electric energy is effectively saved, and the service life of the battery pack and the service life of the circuit are prolonged.
Description
technical field [0001] The invention relates to a circuit for detecting the insertion of a USB device and a method for detecting the insertion of the USB device using the detection circuit. Background technique [0002] The USB female socket is a connection socket commonly used at present. It is an essential port for outdoor products such as portable USB power supplies. It is widely used in charging or data exchange scenarios. The common shapes of USB-type A and USB-type C are as follows: Figure 1a , 1b shown. The principle of using the USB socket to charge an external USB device is as follows: figure 2 As shown, the power module is connected to the USB socket through the power cable, and the power module is connected to the protocol module through communication, and the protocol module is connected to the USB socket through communication. Among them, the power supply module can adopt DC / DC module or AC / DC module. Common DC / DC chips include SC8103, SC8815, TPS56339, BQ25...
Claims
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IPC IPC(8): G06F11/22G06F11/267
CPCG06F11/221G06F11/267
Inventor 龚小明魏志成谭亮吴亮杨进
Owner CHONGQING DIANGE TECH (GRP) CO LTD