Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface

Abstract

The invention discloses a television with multiplexing of a USB (Universal Serial Bus) interface and a method for multiplexing the USB interface. The television comprises the USB interface, a multimedia signal processing unit, a serial-port signal processing unit, a switching circuit, an I / O (Input / Output) control unit, an input unit and a central processor, wherein the USB interface is connected with the multimedia signal processing unit and is connected with the serial-port signal processing unit by the switching circuit; the output of the I / O control unit is connected to the control end of the switching circuit; the central processor is respectively connected with the multimedia signal processing unit, the serial-port signal processing unit and the I / O control unit; and the output of the input unit is connected to the central processor. The invention has the advantages that the switching circuit is connected between the USB interface and the serial-port signal processing unit, the connection between the serial-port signal processing unit and the USB interface is isolated by utilizing the switching circuit, and when the isolation needs to be realized, the switching circuit is controlled by the I / O control unit, so that the USB interface not only can be used as a multimedia input interface, but also can be multiplexed as a serial port to complete all the functions of the serial port.

Description

technical field [0001] The invention relates to the technical field of televisions, in particular to a television with multiplexing USB interfaces and a method for multiplexing the USB interfaces. Background technique [0002] With the further development of TV technology, especially the development of digital TV and Internet TV, the functions of TV are also increasing. Therefore, it is necessary to continuously update the control software in the TV to adapt to the continuous improvement of TV functions expand. Current TV software upgrades are usually achieved through a USB interface or a serial port. Like this, in order to realize the upgrade of the control software in the TV, a USB interface and a serial port, that is, a COM interface, are usually set in the existing TV. It has the characteristics of fast transmission speed, convenient plug-in and good developability. The USB interface supports plug-and-play and hot-swap functions of the device. Although the transmission ...

AI Technical Summary

Problems solved by technology

Current TV software upgrades are usually achieved through a USB interface or a serial port. Like this, in order to realize the upgrade of the control software in the TV, a USB interface and a serial port, that is, a COM interface, are usually set in the existing TV. It has the characteristics of fast transmission speed, convenient plug-in and good developability. The USB interface supports plug-and-play and hot-swap functions of the device. Although the transmission speed of the COM interface is slow and the connection is inconvenient, the COM interface has a long transmission distance. Low cost, simple development, no need for driver support

Because the existing TV sets are equipped with USB ports and COM ports, this has resulted in a large number of ports on the current TV sets, which virtually increases the area of ​​the TV PCB board, resulting in an increase in the cost of the TV set.

Images