Program-controlled USB HUB circuit and module
A technology for controlling modules and circuits, applied in data processing power supply, electrical digital data processing, instruments, etc., can solve problems such as USB product impact, USB port crash, signal jitter, etc., to improve performance, improve signal quality, and improve signal transmission. quality effect
Active Publication Date: 2022-03-04
SHENZHEN WELLTEST TECH CO LTD
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Problems solved by technology
In industrial automation control, USB needs to be automatically plugged and unplugged. In the process of automatic function test, it is often necessary to transfer the USB signal. The moment the transfer signal is connected, the USB will have an impact on the product, which may seriously damage the product. The product will cause the USB port to crash; there is signal jitter in the process of mechanical contact, which may easily cause the USB device to be unrecognizable; the default state of USB signal power-on cannot be flexibly controlled, and it cannot be restored after a failure
[0003] Especially when the product is connected to the device through a USB HUB, the speed of the product will slow down, and it will be unusable due to insufficient power supply
Method used
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[0031] The present invention will be further described in detail below with reference to the accompanying drawings.
[0032] A program-controlled USB HUB circuit of the present application, such as figure 1 As shown, it includes n USB control modules, MCU control modules, communication modules, and m USB switch modules. The MCU control module is connected to the communication module and each USB switch module. The communication module is also connected to the first USB control module. The control modules are connected in series.
[0033] Each USB switch module is used to connect a downstream USB port, and the MCU control module is used to connect the upper computer and the upstream USB port.
[0034] The first USB control module 1 is connected with k USB switch modules, the second USB control module 2 is connected with l-(k+1) USB switch modules, and the Nth USB control module n is connected with m-h USB switch modules.
[0035] Wherein, k / l / h / m / n are positive integers great...
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The program control USB HUB circuit comprises an MCU control module, a communication module, at least one USB control module and at least one USB switch module, the MCU control module is connected with the communication module and the USB switch module, and the communication module is further connected with the first USB control module and used for converting USB signals into UART signals and transmitting the UART signals to the MCU control module; the USB control modules are mutually connected, the first USB control module is connected with an upstream USB port, and the communication module is connected with one of the USB control modules; each USB control module is connected with at least one USB switch module, and each USB switch module is used for being connected with a downstream USB port; each USB switch module is respectively connected with the MCU control module, and the MCU control module is used for controlling each USB switch module according to an instruction of an upper computer, realizing connection or disconnection of different downstream USB ports and upstream USB ports, realizing program control of the USB HUB, and ensuring stability of signals and power supplies of the downstream USB ports.
Description
technical field [0001] The invention relates to the technical field of USB HUB, in particular to a program-controlled USB HUB circuit and a module. Background technique [0002] At present, USB (Universal Serial Bus) is the most mature and general communication interface. Because the USB port has the characteristics of supporting hot plugging, fast transmission speed, easy operation and easy maintenance, etc., it is widely used in the manufacture of consumer electronic products. In industrial automation control, USB needs to be automatically plugged and unplugged. In the process of automatic function testing, it is often necessary to transfer the USB signal. When the transfer signal is connected, the USB will impact the product, which may seriously damage the product. The product will cause the USB port to crash; there is signal jitter in the process of mechanical contact, which is easy to cause the USB device to fail to recognize; it cannot flexibly control the default sta...
Claims
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IPC IPC(8): G06F1/26G06F13/40
CPCG06F1/263G06F1/266G06F13/4022G06F13/4068G06F2213/0042
Inventor 余守军张艳罗玉奎
Owner SHENZHEN WELLTEST TECH CO LTD