Terminal multiplex circuit and multimedia terminal equipment

Abstract

The invention discloses a terminal multiplex circuit which comprises an AV (audio video)-OUT terminal, an isolation and integration module, a master controller and a channel switching module. The isolation and integration module detects a state of the AV-OUT terminal and outputs detection signals, and the master controller identifies the state of the AV-OUT terminal according to the detection signals and outputs switching control signals, so that serial signal channels or audio signal channels can be gated by the channel switching module under the control of the master controller, and serial signals or audio signals can be transmitted via the AV-OUT terminal. The invention further discloses multimedia terminal equipment. The multimedia terminal equipment comprises the terminal multiplex circuit. The terminal multiplex circuit and the multimedia terminal equipment have the advantages that the AV-OUT terminal not only can be used as a normal AV-OUT terminal, but also can be used as a serial debugging interface, accordingly, the serial signals and the audio signals in the multimedia terminal equipment can be transmitted by the AV-OUT terminal in a shared manner, usage of functional terminals can be reduced, the multimedia terminal equipment can be lightened and thinned, and the design cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a terminal multiplexing circuit and multimedia terminal equipment. Background technique [0002] On TVs and other multimedia terminal equipment, there will be AV-OUT (Audio Video OUT, audio and video output) terminals. At the same time, for the engineering development, debugging and maintenance of terminal equipment, some debugging interfaces are usually reserved, and the serial port is the most commonly used One of the debugging interfaces. [0003] For manufacturers of electronic equipment, in order to make the development and maintenance of electronic equipment convenient and feasible, it is hoped that the electronic equipment can reserve an interface for debugging to improve the efficiency of product development and maintenance. However, the reserved debugging serial port Therefore, the internal structure design and PCB layout of electronic equipment need to inc...

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Problems solved by technology

[0003] For manufacturers of electronic equipment, in order to make the development and maintenance of electronic equipment convenient and feasible, it is hoped that the electronic equipment can reserve an interface for debugging to improve the efficiency of product development and maintenance. However, the reserved debugging serial port Therefore, the internal structure design and PCB layout of electronic equipment need to increase their corresponding vacancies to place serial port terminals, which not only brings trouble and trouble to the design, but also increases the design cost, and it is difficult to realize the thinning of the product

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