CN114238192B - Control circuit and control method for positive and negative short circuit of TYPEC - Google Patents
Control circuit and control method for positive and negative short circuit of TYPEC Download PDFInfo
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- CN114238192B CN114238192B CN202210154728.4A CN202210154728A CN114238192B CN 114238192 B CN114238192 B CN 114238192B CN 202210154728 A CN202210154728 A CN 202210154728A CN 114238192 B CN114238192 B CN 114238192B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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Abstract
The invention discloses a control circuit and a control method for positive and negative short circuit of TYPEC, wherein the control circuit comprises: a comparator module and a switch module connected to each other; the switch module comprises a first USB switch U3 and a second USB switch U4; the first USB switch U3 is connected between positive plug communication lines of the TYPEC interface, and the second USB switch U4 is connected between negative plug communication lines; the input end of the comparator module is connected with a forward plug CC1 wire of the TYPEC interface, and the first USB switch U3 and the second USB switch U4 are controlled according to the output of the comparator module, so that the on-off of a forward plug communication wire and a backward plug communication wire is controlled. According to the invention, the first USB switch U3 and the second USB switch U4 are controlled to be turned on and off according to the voltage of the positive plug CC1 wire, and then the on-off of the positive plug communication wire and the reverse plug communication wire are controlled, so that one branch wire of the USB2.0 is cut off.
Description
Technical Field
The invention relates to the technical field of electronic equipment interfaces, in particular to a control circuit and a control method for positive and negative short circuit of TYPEC.
Background
At present, TYPEC has become the mainstream interface of consumer electronics, and the electronic product TYPEC has become the mainstream interface of electronic products on the market. The TYPEC is internally provided with a positive and a negative two sets of usb2.0, and some electronic products can connect the positive and the negative two sets of usb 2.0. When the TYPEC interface is used, the double-sided wires are short-circuited, and the signal branch is overlong due to the other unused usb2.0 communication wire, so that the signal is influenced, and the usb2.0 communication fails. There is currently no disclosed solution.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a control circuit and a control method for automatically switching the positive and negative short circuit of the TYPEC of the USB channel.
The purpose of the invention is realized by the following technical scheme:
a control circuit for forward and reverse shorting of a TYPEC, comprising: a comparator module and a switch module connected to each other; the switch module comprises a first USB switch U3 and a second USB switch U4; the first USB switch U3 is connected between the positive plug communication lines of the TYPEC interface, and the second USB switch U4 is connected between the negative plug communication lines of the TYPEC interface; the input end of the comparator module is connected with a positive plug CC1 line of the TYPEC interface, the output end of the comparator module is connected with the first USB switch U3 and the second USB switch U4, the first USB switch U3 and the second USB switch U4 are controlled according to the output of the comparator module, and then the connection and disconnection of the positive plug communication line and the reverse plug communication line are controlled.
Preferably, the comparator module comprises a first comparator, a second comparator and a resistor R1; the non-inverting input end of the first comparator and the inverting input end of the second comparator are connected with a positive plug CC1 line of the TYPEC interface, the inverting input end of the first comparator is connected with a first power supply end, the power supply end of the first comparator is connected with a second power supply end, the grounding end of the first comparator is connected to the ground, the non-inverting input end of the second comparator is connected with a third power supply end, the output end of the first comparator and the output end of the second comparator are connected with one end of a resistor R1, the other end of the resistor R1 is connected with the second power supply end, and the output end of the first comparator and the output end of the second comparator are connected with a first USB switch U3 and a second USB switch U4.
Preferably, the comparator module further comprises: the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the capacitor C1; the inverting input end of the first comparator is connected with the second power supply end through a resistor R2, the inverting input end of the first comparator is further connected with the ground through a resistor R3, the non-inverting input end of the second comparator is connected with the second power supply end through a resistor R4, the non-inverting input end of the second comparator is further connected with the ground through a resistor R5, and the power supply end of the first comparator is further connected with the ground through a capacitor C1.
Preferably, the switch module further comprises: the resistor R6, the resistor R7, the resistor R8, the capacitor C2 and the capacitor C3; the output end of the first comparator is also connected with the SEL end of a first USB switch U3 through a resistor R7, the/OE end and the grounding end GND of the first USB switch U3 are both connected to the ground, and the D + end and the D-end of the first USB switch U3, the HSD2+ end and the HSD 2-end are respectively connected between positive plug communication lines of the TYPEC interface; the power supply end of the first USB switch U3 is connected with a second power supply end, and the power supply end of the first USB switch U3 is also connected to the ground through a capacitor C2; the output end of the first comparator is further connected with an OE end of a second USB switch U4, the SEL end of the second USB switch U4 is further connected to a second power supply end through a resistor R7 and a resistor R6 in sequence, and a D + end and a D-end of the second USB switch U4, an HSD2+ end and an HSD 2-end are connected between reverse plug-in communication lines of the TYPEC interface respectively; the power supply end of the second USB switch U4 is connected with a second power supply end, and the power supply end of the second USB switch U4 is also connected to the ground through a capacitor C3.
Preferably, the first USB switch U3 and the second USB switch U4 are both FSUSB42 MUX.
A method of controlling a control circuit with forward and reverse sides of a TYPEC shorted, comprising: the comparator module collects and compares the voltage of a positive plug CC1 wire of the TYPEC interface, and controls the on-off of the positive plug communication wire and the negative plug communication wire according to the voltage of the positive plug CC1 wire.
Preferably, the controlling the connection and disconnection of the forward plug communication line and the backward plug communication line according to the voltage of the forward plug CC1 line comprises: if the voltage of the positive plug CC1 line is judged to be in the first threshold range, controlling a first USB switch U3 to be turned on, and cutting off the positive plug communication line; and if the voltage of the positive plug CC1 line is judged to be in the second threshold range, the second USB switch U4 is controlled to be turned on, and the reverse plug communication line is cut off.
Preferably, the comparator module collecting and comparing the voltage of the positive CC1 line of the TYPEC interface comprises: the voltage of the positive plug CC1 line of the TYPEC interface is collected and compared by a first comparator and a second comparator.
Compared with the prior art, the invention has the following advantages:
by adding the comparator module and the switch module which are connected with each other into the typeC interface wire, the comparator module collects and compares the voltage of a CC1 line which is inserted in the TYPEC interface, the first USB switch U3 and the second USB switch U4 are controlled to be turned on and off according to the voltage of a CC1 line which is inserted in the TYPEC interface, and then the on and off of a communication line which is inserted in the forward direction and a communication line which is inserted in the backward direction are controlled, the USB access can be automatically switched, and an overlong branch is cut off, so that the problem that the USB2.0 is hung up is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a pin diagram of the TYPEC interface of the present invention.
Fig. 2 is a block circuit diagram of a control circuit with forward and reverse sides shorted according to the TYPEC of the present invention.
Fig. 3 is a circuit diagram of a control circuit with both sides shorted according to the TYPEC of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Referring to fig. 1-3, a control circuit for forward and reverse shorting of a TYPEC, comprising: a comparator module and a switch module connected to each other; the switch module comprises a first USB switch U3 and a second USB switch U4; the first switch is connected between the positive plug communication lines (A6 \ A7) of the TYPEC interface, and the first switch is connected between the reverse plug communication lines (B6 \ B7) of the TYPEC interface; the input end of the comparator module is connected with a positive plug CC1 line of the TYPEC interface, the output end of the comparator module is connected with the first USB switch U3 and the second USB switch U4, the first USB switch U3 and the second USB switch U4 are controlled according to the output of the comparator module, and then the connection and disconnection of the positive plug communication line and the reverse plug communication line are controlled.
Two CC lines are arranged in a USB2.0 interface of the TYPEC, namely a CC1 line and a CC2 line, and a CC1 line and a CC2 line are respectively corresponding to the positive insertion and the negative insertion of the interface. The CC1 line connects the A5 pin of the USB2.0 interface of TYPEC. It is known that the voltage is 0.8V to 2.6V when the CC wire is connected as a communication line, and 0V or Vbus when the CC wire is not connected, and the state of the CC1 wire is detected based on this characteristic to determine the front and back surfaces into which the typeC interface wire is inserted, thereby cutting the USB2.0 branch line.
This is disclosed adopts the voltage that CC1 line was just inserted to the collection of comparator module and comparison TYPEC interface, and the voltage of inserting CC1 line according to just controls opening of first USB switch U3, second USB switch U4 and closes, and then controls and just inserts the break-make of communication line, anti-communication line of inserting to cut one of them branch line of USB2.0, avoid TYPEC interface USB2.0 can cause the communication to hang up because of the branch of another group.
In the present embodiment, the comparator module includes a first comparator U1, a second comparator U2, and a resistor R1; the non-inverting input terminal of the first comparator U1 and the inverting input terminal of the second comparator U2 are connected to a positive plug CC1 of the TYPEC interface through lines, the inverting input terminal of the first comparator U1 is connected to a first power supply terminal (0.8V), the power supply terminal of the first comparator U1 is connected to a second power supply terminal (VCC), the ground terminal of the first comparator U1 is connected to ground, the non-inverting input terminal of the second comparator U2 is connected to a third power supply terminal (2.6V), the output terminal of the first comparator U1 and the output terminal of the second comparator U2 are both connected to one end of a resistor R1, the other end of the resistor R1 is connected to the second power supply terminal, and the output terminal of the first comparator U1 and the output terminal of the second comparator U2 are both connected to the first USB switch U3 and the second USB switch U4.
Two comparators are used to compare the line CC1, determine the voltage of the line CC1,
1. if the voltage on the CC1 line is higher than 2.6V or lower than 0.8V (first threshold range), USB2.0 of the plug-in communication line A6/A7 is cut off and USB2.0 of B6/B7 is turned on.
2. If the voltage of CC1 is lower than 2.6V and higher than 0.8V (second threshold range), USB2.0 of reverse plug communication line A6/A7 is turned on and USB2.0 of B6/B7 is turned off.
In this embodiment, the comparator module further includes: the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the capacitor C1; the inverting input terminal of the first comparator U1 is connected to the second power supply terminal through a resistor R2, the inverting input terminal of the first comparator U1 is further connected to ground through a resistor R3, the non-inverting input terminal of the second comparator U2 is connected to the second power supply terminal through a resistor R4, the non-inverting input terminal of the second comparator U2 is further connected to ground through a resistor R5, and the power supply terminal of the first comparator U1 is further connected to ground through a capacitor C1.
In this embodiment, the first USB switch U3 and the second USB switch U4 are both FSUSB42 MUX.
In this embodiment, the switch module further includes: the resistor R6, the resistor R7, the resistor R8, the capacitor C2 and the capacitor C3; the output end of the first comparator U1 is further connected with the SEL end of a first USB switch U3 through a resistor R7, the/OE end and the grounding end GND of the first USB switch U3 are both connected to the ground, and the D + end and the D-end of the first USB switch U3, the HSD2+ end and the HSD 2-end are respectively connected between positive plug communication lines of the TYPEC interface; the power supply end of the first USB switch U3 is connected with a second power supply end, and the power supply end of the first USB switch U3 is also connected to the ground through a capacitor C2; the output end of the first comparator U1 is further connected with an OE end of a second USB switch U4, the SEL end of the second USB switch U4 is further connected to a second power supply end through a resistor R7 and a resistor R6 in sequence, and a D + end, a D-end, an HSD2+ end and an HSD 2-end of the second USB switch U4 are connected between reverse plug communication lines of the TYPC interface respectively; the power supply end of the second USB switch U4 is connected with a second power supply end, and the power supply end of the second USB switch U4 is also connected to the ground through a capacitor C3.
A method of controlling a control circuit with forward and reverse sides of a TYPEC shorted, comprising:
the comparator module collects and compares the voltage of a positive plug CC1 wire of the TYPEC interface, and controls the on-off of the positive plug communication wire and the negative plug communication wire according to the voltage of the positive plug CC1 wire.
In this embodiment, the controlling the on/off of the forward plug communication line and the backward plug communication line according to the voltage of the forward plug CC1 includes: if the voltage of the positive plug CC1 line is judged to be higher than 2.6V or lower than 0.8V, the first USB switch U3 is controlled to be opened, and the positive plug communication line is cut off; and if the voltage of the line of the positive plug CC1 is judged to be lower than 2.6V and higher than 0.8V, the second USB switch U4 is controlled to be opened, and the reverse plug communication line is cut off.
In this embodiment, the acquiring and comparing the voltage of the positive CC1 line of the TYPEC interface by the comparator module includes: the voltage of the positive plug CC1 line of the TYPEC interface is collected and compared by a first comparator U1 and a second comparator U2.
The present disclosure is applicable to systems using a TYPEC interface, and in addition, equally applicable to the field of testing with a TYPEC interface, where it is necessary to ensure that problems are solved in verifying the compatibility, functionality, etc. parameters of TYPEC.
In conclusion, the present disclosure can solve the problem of signal interference and loss caused by the condition that the USB2.0 communication line in the TYPEC interface is too long after the host computer short-circuits the USB2.0 signal and uses two pairs of TYPEC lines of USB2.0, so that the USB2.0 can work normally.
The above-described embodiments are preferred embodiments of the present invention, and are not intended to limit the present invention, and any other modifications or equivalent arrangements which do not depart from the spirit and scope of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A control circuit for shorting front and back sides of a TYPEC, comprising: a comparator module and a switch module connected to each other;
the switch module comprises a first USB switch U3 and a second USB switch U4; the first USB switch U3 is connected between the positive plug communication lines of the TYPEC interface, and the second USB switch U4 is connected between the negative plug communication lines of the TYPEC interface;
the input end of the comparator module is connected with a forward plug CC1 wire of the TYPEC interface, the output end of the comparator module is connected with the first USB switch U3 and the second USB switch U4, and the first USB switch U3 and the second USB switch U4 are controlled according to the output of the comparator module, so that the on-off of the forward plug communication wire and the backward plug communication wire is controlled;
wherein the comparator module comprises a first comparator, a second comparator and a resistor R1;
the non-inverting input end of the first comparator and the inverting input end of the second comparator are connected with a positive plug CC1 line of the TYPEC interface, the inverting input end of the first comparator is connected with a first power supply end, the power supply end of the first comparator is connected with a second power supply end, the grounding end of the first comparator is connected to the ground, the non-inverting input end of the second comparator is connected with a third power supply end, the output end of the first comparator and the output end of the second comparator are connected with one end of a resistor R1, the other end of the resistor R1 is connected with the second power supply end, and the output end of the first comparator and the output end of the second comparator are connected with a first USB switch U3 and a second USB switch U4.
2. The TYPEC positive-negative shorted control circuit of claim 1, wherein the comparator module further comprises: the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the capacitor C1;
the inverting input end of the first comparator is connected with the second power supply end through a resistor R2, the inverting input end of the first comparator is further connected with the ground through a resistor R3, the non-inverting input end of the second comparator is connected with the second power supply end through a resistor R4, the non-inverting input end of the second comparator is further connected with the ground through a resistor R5, and the power supply end of the first comparator is further connected with the ground through a capacitor C1.
3. The TYPEC positive-negative shorted control circuit of claim 1, wherein the switching module further comprises: the resistor R6, the resistor R7, the resistor R8, the capacitor C2 and the capacitor C3;
the output end of the first comparator is further connected with an SEL end of a first USB switch U3 through a resistor R7, the/OE end and a grounding end GND of the first USB switch U3 are both connected to the ground, and the D + end and the D-end of the first USB switch U3, the HSD2+ end and the HSD 2-end are respectively connected between positive plug communication lines of a TYPEC interface; the power supply end of the first USB switch U3 is connected with a second power supply end, and the power supply end of the first USB switch U3 is also connected to the ground through a capacitor C2;
the output end of the first comparator is further connected with an OE end of a second USB switch U4, the SEL end of the second USB switch U4 is further connected to a second power supply end through a resistor R7 and a resistor R6 in sequence, and a D + end and a D-end of the second USB switch U4, an HSD2+ end and an HSD 2-end are connected between reverse plug-in communication lines of the TYPEC interface respectively; the power supply end of the second USB switch U4 is connected to a second power supply end, and the power supply end of the second USB switch U4 is further connected to ground through a capacitor C3.
4. The TYPEC front-to-back short-circuited control circuit of claim 1, wherein the first USB switch U3 and the second USB switch U4 are both FSUSB42MUX types.
5. A method for controlling a control circuit with TYPEC short-circuited on both sides, which is applied to the control circuit according to any one of claims 1 to 4, and which comprises:
the comparator module collects and compares the voltage of a positive plug CC1 wire of the TYPEC interface, and controls the on-off of the positive plug communication wire and the negative plug communication wire according to the voltage of the positive plug CC1 wire.
6. The control method according to claim 5, wherein the controlling the on/off of the forward plug communication line and the backward plug communication line according to the voltage of the forward plug CC1 line comprises:
if the voltage of the positive plug CC1 line is judged to be in the first threshold range, controlling a first USB switch U3 to be turned on, and cutting off the positive plug communication line;
and if the voltage of the positive plug CC1 line is judged to be in the second threshold range, the second USB switch U4 is controlled to be turned on, and the reverse plug communication line is cut off.
7. The control method of claim 5, wherein the comparator module collecting and comparing the voltage of the positive CC1 line of the TYPEC interface comprises:
the voltage of the positive plug CC1 line of the TYPEC interface is collected and compared by a first comparator and a second comparator.
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| CN202210154728.4A CN114238192B (en) | 2022-02-21 | 2022-02-21 | Control circuit and control method for positive and negative short circuit of TYPEC |
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| CN202210154728.4A CN114238192B (en) | 2022-02-21 | 2022-02-21 | Control circuit and control method for positive and negative short circuit of TYPEC |
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| CN107665177A (en) * | 2017-11-23 | 2018-02-06 | 立讯精密工业（滁州）有限公司 | USB switching techniques based on USB Type C frameworks |
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| CN105120404B (en) * | 2015-07-31 | 2018-11-30 | 华为技术有限公司 | A kind of audio frequency apparatus, terminal device and electronic equipment |
| CN105514716B (en) * | 2015-12-31 | 2018-02-13 | 深圳市鑫桐源科技有限公司 | USB plug, signal switching circuit and USB data line |
| CN106021150B (en) * | 2016-04-29 | 2019-02-15 | 青岛海信电器股份有限公司 | Type-C interface equipment, communication system and communication means |
| CN106300314B (en) * | 2016-10-28 | 2019-05-10 | 英特格灵芯片(天津)有限公司 | The high voltage protective system and method for Type-C interface chip CC pin |
| CN209460757U (en) * | 2019-04-09 | 2019-10-01 | 深圳市智微智能科技开发有限公司 | A kind of positive anti-plug identification circuit of USB TYPE-C equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107665177A (en) * | 2017-11-23 | 2018-02-06 | 立讯精密工业（滁州）有限公司 | USB switching techniques based on USB Type C frameworks |
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