Interface circuit

Abstract

The embodiment of the invention provides an interface circuit which comprises a main scheme module used for obtaining high-definition multimedia interface HDMI data and asynchronous transmit-receive transmitter URAT data; a data conversion module used for combining the HDMI data and the URAT data sent by the main scheme module into the same output channel; a self-adaptive control module used for switching the output mode of the output channel; and a HDMI interface module used for receiving data corresponding to the output mode. An HDMI interface is used as a URAT debugging interface, the function of a URAT communication interface is achieved under the condition that the original function of an HDMI high-speed signal line is not affected, and the functions of software debugging and system upgrading maintenance can be achieved directly through the HDMI interface.

Description

technical field [0001] The invention relates to the technical field of HDMI, in particular to an interface circuit. Background technique [0002] During the development and debugging process of Android system products, in order to add hardware function modules and software function modules, it is necessary to use URAT to add codes at each system layer for debugging, obtain the product kernel, and print debugging data; during the product aging test process, it is necessary to record Android The kernel data is analyzed and judged, the problem is located and the system bug is optimized. Due to the limitations of product design, during the process of R&D and debugging, aging testing, and after-sales maintenance and upgrading, it is necessary to repeatedly disassemble the product to connect to URAT for debugging. For products with large size and complex structure, repeated disassembly may cause problems such as damage to the display screen, which causes great inconvenience for p...

AI Technical Summary

Problems solved by technology

For products with large size and complex structure, repeated disassembly may cause problems such as damage to the display screen, causing great inconvenience for product upgrades

[0003] At present, the solution is to use a transistor to convert the HDMI interface to the URAT interface, and connect the URAT through the HDMI interface, but the key parameters such as the turn-on time, turn-off time, rising edge and falling edge time, and turn-on delay time of the PN junction of the transistor It is an important factor affecting the URAT communication transmission process. The instability of the above parameters is likely to cause problems such as data packet loss and abnormal communication waveforms. During maintenance and upgrades, it will cause problems such as incomplete data acquisition, garbled codes, and incomplete input information.

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