Mobile phone interface multiplexing circuit based on standard micro USB interface

A mobile phone interface and multiplexing circuit technology, which is applied in the field of communication, can solve problems such as inconsistent interface definition, waste of space and cost, and incompatibility of accessories, and achieve the effects of simplifying structural design, reducing product cost, and reducing occupied space

Active Publication Date: 2011-06-15
苏州盛泽科技创业园发展有限公司
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AI Technical Summary

Problems solved by technology

[0003] For example: a typical interface solution for existing mobile phones is that the USB and serial ports are multiplexed with an 8-pin or 10-pin flat head connector, and the earphone uses a single four-segment socket. Some mobile phones can also see a 20-pin

Method used

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  • Mobile phone interface multiplexing circuit based on standard micro USB interface
  • Mobile phone interface multiplexing circuit based on standard micro USB interface

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention 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.

[0017] see figure 1 As shown, the present invention is based on the standard Micro USB interface, and X6 is a connector conforming to the Micro USB interface specification. When connecting a USB device or USB HOST, the first pin of X6 is the VBUS signal, and the second pin is the USB D- signal , the third pin is the USB D+ signal, the fourth pin is the USB ID signal, and the fifth pin is the ground signal. In the present invention, different pins of the X6 can be multiplexed as corresponding peripheral signals and realize corresponding functions when connecting different peripheral devices.

[00...

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Abstract

The invention provides a mobile phone interface multiplexing circuit based on a standard micro USB interface. The mobile phone interface multiplexing circuit comprises an interface device and an analog switch, wherein the second and the third pins of the interface device are respectively connected with the eighth and the seventh pins on the common end of the analog switch; the fourth pin of the interface device is connected with the MIC input terminal of an earphone of a baseband processor through a first magnetic bead; the fifth pin of the interface device is connected with the signal ground through a second magnetic bead; the first pin of the analog switch is connected with a positive signal terminal of the baseband processor, the twelfth pin of the analog switch is connected with the negative signal terminal of the baseband processor; the second and the third pins of the analog switch are respectively connected with the stereo output terminal of the earphone of the baseband processor through a third magnetic bead and a fourth magnetic bead; the fourth and the fifth pins of the analog switch are respectively connected with a serial transceiving terminal of the baseband processor through a first diode and a second diode; the sixth pin of the analog switch is connected with the signal ground; the ninth and the tenth pins of the analog switch are connected with an analog switch control circuit; and the eleventh pin of the analog switch is connected with a power source.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a mobile phone interface multiplexing circuit based on a standard Micro USB interface. Background technique [0002] Existing mobile phones, portable media players (PMP), mobile Internet devices (MID) and other portable products require a variety of interfaces to provide data connections, audio and video outputs, internal programming and firmware upgrades, and lithium battery charging. In addition to the USB data interface and the standard 3.5mm or 2.5mm headphone audio interface, various companies use a variety of interface mechanisms and their own specific interface pin definitions. As a result, a large number of various incompatible chargers, data cables and other accessories have been produced. [0003] For example: a typical interface solution for existing mobile phones is that the USB and serial ports are multiplexed with an 8-pin or 10-pin flat head connector, and ...

Claims

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Application Information

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IPC IPC(8): G06F13/40H04M1/725H04M1/72412
Inventor 邓玖根王颖平朱人中
Owner 苏州盛泽科技创业园发展有限公司
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