CN214202370U - Double-channel serial port device with mutual isolation function applied to embedded debugging system - Google Patents
Double-channel serial port device with mutual isolation function applied to embedded debugging system Download PDFInfo
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- CN214202370U CN214202370U CN202120298580.2U CN202120298580U CN214202370U CN 214202370 U CN214202370 U CN 214202370U CN 202120298580 U CN202120298580 U CN 202120298580U CN 214202370 U CN214202370 U CN 214202370U
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Abstract
The utility model relates to an embedded debugging technical field discloses a be applied to embedded debugging system's binary channels serial ports device that has mutual isolation function, including the circuit board and set up the USB interface on the circuit board, USB changes double-circuit serial ports bridging chip, the chip is kept apart to first double-channel signal, the chip is kept apart to the second double-channel signal, first serial ports and second serial ports, USB changes the signal input part of double-circuit serial ports bridging chip and the signal output part communication connection of USB interface, two way signal output part keep apart the signal input part communication connection of chip and second double-channel signal isolation chip with first double-channel signal respectively, the signal output part that chip and second double-channel signal isolation chip were kept apart to first double-channel signal is respectively with the signal input part communication connection of first serial ports and second serial ports. The technical scheme of the utility model can make single USB interface realize two way serial communication, be favorable to the debugging and the popularization of product, and the practicality is strong.
Description
Technical Field
The utility model relates to an embedded debugging technical field, in particular to be applied to embedded debug system's binary channels serial ports device that has mutual isolation function.
Background
In the embedded debugging process, the running state of the target board needs to be monitored. A common method is to use serial communication to check system information through a serial port or read log information of a target board through a serial port.
At present, a serial port communication circuit is adopted, and a target board cannot be directly connected with a USB interface of a computer to carry out communication under the condition that voltage difference exists. A USB interface isolator is required to be connected in series to the USB interface of the computer. After the serial port communication circuit is connected in series with the isolator, a channel communication is obtained after the serial port communication circuit is connected. If two different target boards need to be subjected to log reading, 2 USB interfaces need to be occupied, each USB interface needs to be connected with a USB interface isolator in series, and then two paths of serial communication can be realized by connecting a serial communication circuit. The power supply of the communication circuit generally has two modes, namely obtaining the power supply from the USB interface or the target board, and obtaining the power supply from the target board, and because the isolation communication of the mode enables the ground wire of the serial port conversion circuit to be connected with the ground wire of the target board, namely the noise of the serial port communication circuit is introduced into the ground wire of the target board; the power supply is obtained from the USB interface, and an independent external isolation voltage-stabilized power supply is needed to be arranged for realizing the power supply, so that although the noise influence on the target board can be reduced, an additional power circuit is needed to be added, the volume of the equipment is occupied, and the miniaturization of the equipment is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to embedded debug system's binary channels serial ports device that has mutual isolation function aims at two way serial ports communications and isolation function integration in an organic whole, and two way serial ports communications can be realized to a USB interface, and realize two way serial ports passageway mutual isolations, reduce the noise introduction to the target board.
In order to achieve the above object, the utility model provides a dual-channel serial port device with mutual isolation function for embedded debugging system, which comprises a circuit board, and a USB interface, a USB-to-dual-channel serial port bridging chip, a first dual-channel signal isolation chip, a second dual-channel signal isolation chip, a first serial port and a second serial port arranged on the circuit board, wherein the USB interface is arranged at one end of the circuit board, the first serial port and the second serial port are respectively arranged at the other end of the circuit board, the signal input end of the USB-to-dual-channel serial port bridging chip is in communication connection with the signal output end of the USB interface, the USB-to-dual-channel serial port bridging chip is provided with two-channel signal output ends, the two-channel signal output ends are respectively in communication connection with the signal input ends of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip, the signal output part of the first double-channel signal isolation chip and the second double-channel signal isolation chip is respectively in communication connection with the signal input part of the first serial port and the signal input part of the second serial port, the power input part of the USB-to-double-channel serial port bridging chip is electrically connected with the power output part of the USB interface, the power output part of the USB-to-double-channel serial port bridging chip is respectively electrically connected with the signal side power input part of the first double-channel signal isolation chip and the signal side power input part of the second double-channel signal isolation chip, the power output part of the first serial port and the power output part of the second serial port are respectively electrically connected with the isolation side power output part of the first double-channel signal isolation chip and the isolation side power output part of the second double-channel signal isolation chip, and the first serial port and the second serial port are respectively electrically connected with a target board.
Further, the USB-to-dual serial port bridge chip adopts a CP2105 chip.
Further, the first dual-channel signal isolation chip and the second dual-channel signal isolation chip both adopt ADUM1201 chips.
Furthermore, the first serial port and the second serial port are both double-row pin interfaces.
Adopt the technical scheme of the utility model, following beneficial effect has: the technical scheme of the utility model is that a USB interface is arranged at one end of a circuit board, a first serial port and a second serial port are respectively arranged at the other end of the circuit board, the signal input end of a USB-to-dual serial port bridging chip is in communication connection with the signal output end of the USB interface, the USB-to-dual serial port bridging chip is provided with two signal output ends which are respectively in communication connection with the signal input ends of a first dual-channel signal isolation chip and a second dual-channel signal isolation chip, the signal output ends of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip are respectively in communication connection with the signal input ends of the first serial port and the second serial port, the power input end of the USB-to-dual serial port bridging chip is electrically connected with the power output end of the USB interface, the power output end of the USB-to-dual serial port bridging chip is respectively electrically connected with the signal side power input ends of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip, the power output ends of the first serial port and the second serial port are respectively and electrically connected with the power output ends of the isolation sides of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip, the first serial port and the second serial port are respectively and electrically connected with the target board, two-way serial port communication generated by a single USB interface is realized through the CP2105 chip and the ADUM1201 chip, the requirement on the number of the USB interfaces is reduced, meanwhile, the isolation communication function of two-way communication is also provided, the noise introduction to the target board is effectively reduced, different values can be independently set for the baud rate of each serial port, no isolation power supply is needed, no external voltage stabilizing circuit is needed, the communication voltage of the target board is not limited, namely, the voltage adaptation of the target board is not needed, the voltage range of the adaptive voltage is from 5V to 2.5V, the adaptability is wide, two-way serial port communication and the isolation function are integrated into a whole, and the serial port communication can be realized through the single USB interface, the size of the equipment is reduced, the circuit design is simple, the number of peripheral devices is small, the debugging and the popularization of products are facilitated, and the practicability is high.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of an overall frame connection structure of a dual-channel serial port device with mutual isolation function applied to an embedded debugging system according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a dual-channel serial port device with mutual isolation function for an embedded debugging system according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a be applied to embedded debug system's binary channels serial ports device that has mutual isolation function.
As shown in fig. 1 and fig. 2, in an embodiment of the present invention, the dual-channel serial port apparatus with mutual isolation function for embedded debugging system includes a circuit board (not shown), and a USB interface 101, a USB to dual-channel serial port bridging chip 102, a first dual-channel signal isolation chip 103, a second dual-channel signal isolation chip 104, a first serial port 105, and a second serial port 106 disposed on the circuit board, wherein the USB interface 101 is disposed at one end of the circuit board, the first serial port 105 and the second serial port 106 are disposed at the other end of the circuit board, respectively, a signal input end 1021 of the USB to dual-channel serial port bridging chip 102 is in communication connection with a signal output end of the USB interface 101, the USB to dual-channel serial port bridging chip 102 has two signal output ends 1022, which are in communication connection with signal input ends 1022 of the first dual-channel signal isolation chip 103 and the second dual-channel signal isolation chip 104, respectively, the signal output ends of the first dual-channel signal isolation chip 103 and the second dual-channel signal isolation chip 104 are respectively in communication connection with the signal input ends 107 of the first serial port 105 and the second serial port 106, the power input end 1023 of the USB-to-dual-channel serial port bridge chip 102 is electrically connected with the power output end of the USB interface 101, the power output end 1024 of the USB-to-dual-channel serial port bridge chip 102 is respectively electrically connected with the signal side power input ends of the first dual-channel signal isolation chip 103 and the second dual-channel signal isolation chip 104, the power output end 108 of the first serial port 105 and the second serial port 106 is respectively electrically connected with the isolation side power output ends of the first dual-channel signal isolation chip 103 and the second dual-channel signal isolation chip 104, and the first serial port 105 and the second serial port 106 are respectively electrically connected with a target board.
Specifically, the USB to two-way serial port bridge chip 102 adopts a CP2105 chip.
Specifically, the first dual-channel signal isolation chip 103 and the second dual-channel signal isolation chip 104 both adopt an admm 1201 chip.
Specifically, the first serial port 105 and the second serial port 106 are both dual pin headers.
Specifically, the utility model is provided with a USB interface arranged at one end of a circuit board, a first serial port and a second serial port respectively arranged at the other end of the circuit board, a signal input end of a USB-to-dual serial port bridging chip is in communication connection with a signal output end of the USB interface, the USB-to-dual serial port bridging chip is provided with two signal output ends which are respectively in communication connection with signal input ends of a first dual-channel signal isolation chip and a second dual-channel signal isolation chip, signal output ends of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip are respectively in communication connection with signal input ends of the first serial port and the second serial port, a power input end of the USB-to-dual serial port bridging chip is electrically connected with a power output end of the USB interface, and a power output end of the USB-to-dual-channel serial port bridging chip is respectively electrically connected with a signal side power input end of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip, the power output ends of the first serial port and the second serial port are respectively and electrically connected with the power output ends of the isolation sides of the first dual-channel signal isolation chip and the second dual-channel signal isolation chip, the first serial port and the second serial port are respectively and electrically connected with the target board, two-way serial port communication generated by a single USB interface is realized through the CP2105 chip and the ADUM1201 chip, the requirement on the number of the USB interfaces is reduced, meanwhile, the isolation communication function of two-way communication is also provided, the noise introduction to the target board is effectively reduced, different values can be independently set for the baud rate of each serial port, no isolation power supply is needed, no external voltage stabilizing circuit is needed, the communication voltage of the target board is not limited, namely, the voltage adaptation of the target board is not needed, the voltage range of the adaptive voltage is from 5V to 2.5V, the adaptability is wide, two-way serial port communication and the isolation function are integrated into a whole, and the serial port communication can be realized through the single USB interface, the size of the equipment is reduced, the circuit design is simple, the number of peripheral devices is small, the debugging and the popularization of products are facilitated, and the practicability is high.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (4)
1. The utility model provides a be applied to embedded debugging system's binary channels serial ports device that has mutual isolation function, a serial communication port, including the circuit board and set up in USB interface on the circuit board, USB change double-channel serial ports bridging chip, first double-channel signal isolation chip, second double-channel signal isolation chip, first serial ports and second serial ports, the USB interface set up in the one end of circuit board, first serial ports and second serial ports set up respectively in the other end of circuit board, USB change double-channel serial ports bridging chip's signal input part with the signal output part communication connection of USB interface, USB changes double-channel serial ports bridging chip and has two way signal output part, two way signal output part respectively with the signal input part communication connection of chip and second double-channel signal isolation chip is kept apart to first double-channel signal, the signal output part of chip and second double-channel signal isolation chip respectively with the signal output part of chip is kept apart to first double-channel signal isolation chip and second double-channel signal isolation chip respectively with The signal input part communication connection of first serial ports and second serial ports, USB changes the power input part of double-circuit serial ports bridging chip with the power output end electricity of USB interface is connected, USB changes the power output part of double-circuit serial ports bridging chip respectively with the signal side power input part electricity of chip is kept apart to first double-channel signal keeps apart chip and second double-channel signal and keeps apart the chip is connected, the power output part of first serial ports and second serial ports respectively with the isolation side power output part electricity of chip is kept apart to first double-channel signal and second double-channel signal keeps apart the chip is connected, first serial ports and second serial ports are connected with the target board electricity respectively.
2. The dual-channel serial port device with the mutual isolation function applied to the embedded debugging system of claim 1, wherein the USB-to-dual-channel serial port bridge chip is a CP2105 chip.
3. The dual-channel serial port device with mutual isolation function as claimed in claim 1, wherein the first dual-channel signal isolation chip and the second dual-channel signal isolation chip are both ADUM1201 chips.
4. The dual-channel serial port device with the function of mutual isolation applied to the embedded debugging system of claim 1, wherein the first serial port and the second serial port are both dual-row pin interfaces.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120298580.2U CN214202370U (en) | 2021-02-02 | 2021-02-02 | Double-channel serial port device with mutual isolation function applied to embedded debugging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120298580.2U CN214202370U (en) | 2021-02-02 | 2021-02-02 | Double-channel serial port device with mutual isolation function applied to embedded debugging system |
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| CN214202370U true CN214202370U (en) | 2021-09-14 |
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| CN202120298580.2U Active CN214202370U (en) | 2021-02-02 | 2021-02-02 | Double-channel serial port device with mutual isolation function applied to embedded debugging system |
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