A guarded serial port
A serial port and pin technology, applied in the field of serial port design, can solve the problems of serial port chip burning and failure to work normally, and achieve the effect of reducing the current to ground
Active Publication Date: 2022-05-20
SHENZHEN GONGJIN ELECTRONICS CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In the actual use of the product, sometimes the operator will mistakenly plug the POE power supply into the serial port, that is, the serial port will be mistaken for the network port, causing the serial port chip to be burned and unable to work normally.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] The core of the invention is to provide a serial port with protection, which can effectively avoid the damage of the serial port chip caused when the serial port is mistaken for the network port.
[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] Before designing the serial port protection, the applicant analyzed the network port using the POE system, please refer to figure 1 , is a schematic diagram of a power supply structure of a network po...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a serial port with protection, comprising: a first current limiting module connected to the data sending pin of the serial port and the ground, used to control its own first current limiting module when the voltage of the data sending pin is lower than the first threshold Open circuit between one end and the second end, and when the voltage of the data sending pin is greater than or equal to the first threshold, reduce the current flowing from the data sending pin to the data sending line and absorb the ground current of the data sending pin; and the serial port The second current limiting module connected to the data receiving pin and the ground; the third current limiting module connected to the two ground pins and the ground, used to control itself when the voltage of the two ground pins is lower than the third threshold Conduction between the first end and the second end of the ground pin, and when the voltage of any ground pin is greater than or equal to the third threshold, the ground current of the two ground pins is reduced; the main body of the serial port. The application of the solution provided by the invention avoids the situation that the serial port chip is damaged when the serial port is mistaken for the network port.
Description
technical field [0001] The invention relates to the technical field of serial port design, in particular to a protected serial port. Background technique [0002] In many products, there are both network ports and serial ports. The serial port is used to debug and modify the configuration of the product. The network port can transmit data, and the power supply mode of POE (Power Over Ethernet, Active Ethernet) is usually used. That is to say, the network port also has the function of supplying power to the product. [0003] In the actual use of the product, sometimes the operator will mistakenly plug the POE power supply into the serial port, that is, the serial port will be mistaken for the network port, causing the serial port chip to be burned and unable to work normally. [0004] To sum up, how to effectively avoid the damage of the serial port chip caused when the serial port is mistaken for the network port is a technical problem urgently needed to be solved by those ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40G06F13/42
CPCG06F13/4068G06F13/4282G06F2213/0002Y02D10/00
Inventor 李明星陈定杜雅钟卓杰
Owner SHENZHEN GONGJIN ELECTRONICS CO LTD