Financial key based on audio and usb data transmission and its control method
A technology of data transmission and USB interface, which is applied in the field of low power consumption and high performance financial key and its control, which can solve the problems of high cost, complicated PCB board and high power consumption, and achieve cost saving, complexity reduction and power consumption reduction Effect
Active Publication Date: 2016-01-06
SHANGHAI AISINOCHIP ELECTRONICS TECH
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Problems solved by technology
However, most of the current audio key products have complex circuits, and AD and DA are needed for data conversion between the security chip and the smartphone, which makes the PCB board of the key more complicated, resulting in higher cost and higher power consumption.
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[0040] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0041] like figure 1 As shown, the present invention discloses a financial key based on audio and USB data transmission. The financial key is an audio key, which includes: audio interface 5, USB interface 6 (Universal Serial Bus, UniversalSerialBUS), audio A signal conversion circuit 2, a security chip 1, a battery 3, a battery management chip 4, a power control unit and a linear voltage regulator (lowdropoutregulator, LDO).
[0042] The audio interface 5 includes a left channel terminal, a right channel terminal and a microphone terminal, which is connected to an external audio device, receives audio signals through the left channel terminal and the right channel terminal, and outputs audio signals through a microphone terminal (Mic). The audio device can be a mobile interconnected device such as a mobile phone.
[0043] The USB interface...
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The invention discloses a financial key based on audio frequency and USB data transmission, which comprises an audio frequency interface that connects an external audio frequency device to receive or output audio signal; a USB interface that connects external device to provide power supply to the key and transmit signal; an audio signal converting circuit that connects the audio frequency interface to output the audio signal after processing; a safety chip that connects the audio frequency interface to receive the audio signal through an audio signal converting circuit, and connects an external device through the USB interface; a battery that stores electric energy and provides power supply to the key; a battery management chip that connects the battery and controls charge and discharge to the battery; and a power control unit that connects the battery management chip, the audio frequency interface and the safety chip respectively by circuits. According to the invention, capacitance-resistance network is used to replace an AD / DA module, which reduces audio frequency key panel complexion and saves cost; and static power consumption control method and dynamic power consumption control method are used for command processing to reduce system power consumption.
Description
technical field [0001] The invention relates to an audio key, in particular to a financial key with low power consumption and high performance based on audio and USB data transmission and a control method thereof. Background technique [0002] With the rapid development of Internet technology, e-commerce has developed rapidly in recent years, so how to ensure the security of transactions, especially users' online banking, has become the most concerned issue for people. At present, PC-based transactions are mainly guaranteed by a universal serial bus (UniversalSerialBUS, USB) key (key). The USBKey is mainly used to store digital certificates and perform signature authentication inside the USBKey. At the same time, the key of the USBKey can never be exported, which ensures the security of communication and interaction. [0003] However, with the popularity of mobile Internet devices such as smartphones, transactions are no longer limited to traditional PC-based network transa...
Claims
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IPC IPC(8): G07C9/00
Inventor 杨军平周玉洁
Owner SHANGHAI AISINOCHIP ELECTRONICS TECH