High-speed usb TYPE-C interface device and graphic signal generator supporting bidirectional transmission

Abstract

The invention discloses a high-speed USB TYPE-C interface device supporting bidirectional transmission, an interface conversion device and a graphic signal generator. The interface device includes: a control module, a channel switching module, an interface identification module and a USB TYPE-C interface; the interface identification module is used to identify the data transmission parameters and insertion direction of the USB TYPE-C interface; the control module uses The channel switching module is controlled according to the data transmission parameters, so that the two groups of TX pins and the two groups of RX pins of the USB TYPE-C interface are all used as data transmission channels or switched to be all data reception channels for data transmission; so The control module is further configured to invert the data channel inside the control module according to the insertion direction. The present invention does not rely on a dedicated PD chip to control the channel inversion chip, can realize the switching and inversion of the data channel, and supports the bidirectional transmission and reception of data in the Alternate Mode mode.

Description

technical field [0001] The invention belongs to the technical field of USB transmission, and more specifically relates to a high-speed USB TYPE-C interface device, an interface conversion device and a graphic signal generator supporting bidirectional transmission. Background technique [0002] In recent years, the USB TYPE-C interface has added a reversible plug-in function and reduced the interface size on the basis of the original USB interface's versatility. Once launched, it has won unanimous praise from manufacturers and users. [0003] The USB TYPE-C interface can support 3.3-20V voltage negotiation under the latest power transmission protocol PD3.0 specification, 100W maximum power bidirectional power supply, and has 4 high-speed data transmission channels, and has a USB 2.0 transmission line, but the above The function is optional support for hardware manufacturers. For example, the current mobile phone interface only needs power supply function and does not need to...

AI Technical Summary

Problems solved by technology

[0003] The USB TYPE-C interface can support 3.3-20V voltage negotiation under the latest power transmission protocol PD3.0 specification, 100W maximum power bidirectional power supply, and has 4 high-speed data transmission channels, and has a USB 2.0 transmission line, but the above Function is optional support for hardware manufacturers

For example, the current mobile phone interface only needs power supply function and does not need to perform ultra-high-speed data transmission, so hardware manufacturers will only develop power supply circuits, and this circuit may only be powered by chargers. Notebooks need to use the USB TYPE-C interface to charge and connect the display signal to the screen through this interface. This kind of application is also one-way

Moreover, the current solutions provided by several major chip manufacturers such as TI, STM, and NXP are basically chips that support channel flipping for unidirectional transmission. At present, no dedicated channel flipping chip that supports bidirectional transmission of 20Gbps signals has been developed.

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