CN111209237B - Type-C of optional power supply direction changes Type-C connecting wire - Google Patents
Type-C of optional power supply direction changes Type-C connecting wire Download PDFInfo
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- CN111209237B CN111209237B CN201911330415.4A CN201911330415A CN111209237B CN 111209237 B CN111209237 B CN 111209237B CN 201911330415 A CN201911330415 A CN 201911330415A CN 111209237 B CN111209237 B CN 111209237B
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
According to the Type-C-to-Type-C connecting wire capable of selecting the power supply direction, one port on the connecting wire is used as a power supply port, and the other port is used as a power receiving port; respectively arranging a first power-on node and a first grounding node on a first communication line connecting a power supply port and a power receiving port; a first pull-up switch is connected between the first power-up node and the direct-current power supply node in series, the first grounding node is grounded through the first pull-down switch, and a third switch is connected between the first power-up node and the first grounding node in series; a second power-on node and a second grounding node are respectively arranged on a second communication line connected with the power supply port and the power receiving port; and a second pull-up switch is connected between the second power-on node and the direct-current power supply node in series, the second grounding node is grounded through the second pull-down switch, and a fourth switch is connected between the second power-on node and the second grounding node in series. The invention determines the power supply and receiving directions of the electronic equipment connected to the two ends of the connecting line, and solves the problem that the power supply direction can not be determined when the two equipment are connected.
Description
Technical Field
The invention relates to the technical field of electronic accessories, in particular to a Type-C-to-Type-C connecting wire capable of selecting a power supply direction.
Background
The Type-C (also called USB-C, which is a hardware interface form of USB, i.e. USB C Type interface) interface has become the mainstream interface of electronic products such as notebook computers and mobile phones, and completes functions such as USB (Universal Serial Bus) communication and battery charging. When two electronic devices are connected through a Type-C to Type-C line, the power supply terminal and the power receiving terminal are not explicitly specified in the design specification of the Type-C interface, but are randomly determined at the time of connection.
According to the design specification of the Type-C interface, when two electronic devices are connected through a Type-C to Type-C line, two communication signal lines cc1 and cc2 in the Type-C to Type-C line, the pull-up level at two ends of the communication signal line cc1 and the pull-down level at two ends of the communication signal line are dynamically changed, namely, a square wave is presented, and the frequency is about 10-20 Hz. Assuming that A, B two devices are connected, at the moment of connection, if the a Port is pulling up high and the B Port is pulling down low, the a Port is determined to be a Power Source Port, and vice versa. Therefore, the Power supply direction of a DRP (Dual Role Power) device cannot be specified exactly according to the Type-C design specification.
For the problem that the power supply directions of two DRP devices cannot be determined, the current solution is as follows:
after two DRP equipment of A/B pass through Type-C and change Type-C connecting wire and link to each other, assume that the A port is the feeder ear. The two ports exchange the battery Power state and the external Power state of the two ports through a PD protocol (Power Delivery, a charging standard and technology special for a USB-C interface).
The 1.A port, that is, the power supply terminal, compares the battery state of the power receiving terminal and the external power supply state with the battery state of the power receiving terminal, thereby determining whether a Message (packet defined by the PD communication protocol) needs to be sent to inform the B port of switching the power role.
The 2.B port evaluates the Message and replies with an agreement or a rejection. If the port B agrees to switch the power supply role, the port A closes the power supply output first and waits for the port B to output the power supply. And the port B outputs power after the port A closes the power output.
According to the design specification of the Type-C interface, when two DRP devices of an A/B are connected, the power supply direction cannot be determined. The existing scheme can only switch the power supply direction through a PD protocol after establishing the definite power supply direction.
Meanwhile, the existing scheme is not defined by the Type-C standard and is not compatible in different DRP devices.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a Type-C-to-Type-C connecting line with a selectable power supply direction.
According to the Type-C to Type-C connecting wire capable of selecting the power supply direction, one port on the Type-C to Type-C connecting wire is used as a power supply port, and the other port is used as a power receiving port; a direct current power supply node is arranged on any one power line connecting the power supply port and the power receiving port;
respectively arranging a first power-on node and a first grounding node on a first communication line connecting a power supply port and a power receiving port; a first pull-up switch is connected between the first power-up node and the direct-current power supply node in series, the first grounding node is grounded through the first pull-down switch, and a third switch is connected between the first power-up node and the first grounding node in series;
a second power-on node and a second grounding node are respectively arranged on a second communication line connected with the power supply port and the power receiving port; and a second pull-up switch is connected between the second power-on node and the direct-current power supply node in series, the second grounding node is grounded through the second pull-down switch, and a fourth switch is connected between the second power-on node and the second grounding node in series.
Preferably, the first pull-up switch and the second pull-up switch are synchronous switches.
Preferably, the first pull-down switch and the second pull-down switch are synchronous switches.
Preferably, the first pull-up switch, the second pull-up switch, the first pull-down switch and the second pull-down switch act synchronously, and the third switch and the fourth switch act synchronously.
Preferably, the first pull-up switch, the second pull-up switch, the first pull-down switch and the second pull-down switch are combined to form a synchronous four-pole four-throw switch; the third switch and the fourth switch are combined to form a synchronous double-pole double-throw switch.
Preferably, the direct current power supply device further comprises a first resistor, and the direct current power supply node is connected with the first pull-up switch and the second pull-up switch through the first resistor.
Preferably, the device further comprises a second resistor; and any grounding wire connected with the power supply port and the power receiving port is respectively connected with the first pull-down switch and the second pull-down switch through the second resistor.
According to the Type-C to Type-C connecting line capable of selecting the power supply direction, the power supply and power receiving directions of the electronic equipment connected to the two ends of the connecting line are determined through the arrangement of the pull-up switch and the pull-down switch, and the problem that the power supply direction cannot be determined when the two pieces of equipment are connected through the Type-C to Type-C connecting line is solved.
When the connecting line provided by the invention is used for connecting two electronic devices, the power supply and receiving direction of the connected electronic devices is directly determined by the connecting line, so that the power supply direction identification process of the DRP device is simplified. Meanwhile, the invention solves the problem of confirming the power supply and receiving directions of the electronic equipment connected with the two ends of the connecting line through a hardware scheme, can be compatible with all the existing DRP equipment and has wide application range.
Drawings
Fig. 1 is a schematic diagram of a Type-C to Type-C connection line circuit capable of selecting a power supply direction according to the present invention.
Detailed Description
Referring to fig. 1, according to the Type-C to Type-C connection line capable of selecting a power supply direction, one port on the Type-C to Type-C connection line is used as a power supply port, and the other port is used as a power receiving port. And a direct current power supply node VDD is arranged on any power line Vbus connecting the power supply port and the power receiving port.
A first power-on node A1 and a first ground node B1 are respectively provided on a first communication line cc1 connecting the power supply port and the power receiving port. A first pull-up switch K11 is connected in series between the first power-up node A1 and the direct current power supply node, the first grounding node B1 is grounded through a first pull-down switch K21, and a third switch K3 is connected in series between the first power-up node A1 and the first grounding node B1. In specific implementation, the first grounding node B1 may be connected to any one ground line connected in series to the power supply port and the power receiving port through the first pull-down switch K21 to implement grounding.
A second power-on node A2 and a second ground node B2 are respectively provided on a second communication line cc2 connecting the power supply port and the power receiving port. A second pull-up switch K12 is connected between the second power-up node A2 and the direct current power supply node in series, the second grounding node B2 is grounded through a second pull-down switch K22, and a fourth switch K4 is connected between the second power-up node A2 and the second grounding node B2 in series. In specific implementation, the second ground node B2 may be connected to any one ground line connected in series to the power supply port and the power receiving port through the first pull-down switch K21 to implement grounding.
In this way, in this embodiment, when the first pull-up switch K11, the second pull-up switch K12, the first pull-down switch K21, and the second pull-down switch K22 are all closed, and the third switch K3 and the fourth switch K4 are opened, the device a connected to the power supply port can only be used as a power receiving device, and the device B connected to the power receiving port can only be used as a power supplying device, so that the device B charges the device a through the connection line.
When the first pull-up switch K11, the second pull-up switch K12, the first pull-down switch K21, and the second pull-down switch K22 are all open, and the third switch K3 and the fourth switch K4 are closed, the connection is switched to the mode of the existing connection line, and at this time, the device a and the device B supply power according to the PD protocol.
In this embodiment, the first pull-up switch K11 and the second pull-up switch K12 are synchronous switches, and in specific implementation, a synchronous double-pole double-throw switch may be used. Similarly, the first pull-down switch K21 and the second pull-down switch K22 are synchronous switches.
In this embodiment, the first pull-up switch K11, the second pull-up switch K12, the first pull-down switch K21, and the second pull-down switch K22 operate synchronously, and the third switch K3 and the fourth switch K4 operate synchronously. In specific implementation, the first pull-up switch K11, the second pull-up switch K12, the first pull-down switch K21, and the second pull-down switch K22 may be synchronous switches, such as synchronous four-pole four-throw switches. The third switch K3 and the fourth switch K4 are synchronous switches, for example, synchronous double-pole double-throw switches.
The connection line in this embodiment further includes a first resistor R1, and the dc supply node is connected to the first pull-up switch K11 and the second pull-up switch K12 through the first resistor R1, respectively.
The connection line in this embodiment further includes a second resistor R2; any one of the ground lines connecting the power supply port and the power receiving port is connected to a first pull-down switch K21 and a second pull-down switch K22 through a second resistor R2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (3)
1.A Type-C to Type-C connecting line capable of selecting a power supply direction is characterized in that one port on the Type-C to Type-C connecting line is used as a power supply port, and the other port is used as a power receiving port; setting a direct current power supply node (VDD) on any power line (Vbus) connecting the power supply port and the power receiving port;
a first power-on node (A1) and a first grounding node (B1) are respectively arranged on a first communication line (cc 1) connecting a power supply port and a power receiving port; a first pull-up switch (K11) is connected between the first power-up node (A1) and the direct-current power supply node in series, the first grounding node (B1) is grounded through a first pull-down switch (K21), and a third switch (K3) is connected between the first power-up node (A1) and the first grounding node (B1) in series;
a second power-on node (A2) and a second grounding node (B2) are respectively arranged on a second communication line (cc 2) connecting the power supply port and the power receiving port; a second pull-up switch (K12) is connected between the second power-on node (A2) and the direct-current power supply node in series, the second grounding node (B2) is grounded through a second pull-down switch (K22), and a fourth switch (K4) is connected between the second power-on node (A2) and the second grounding node (B2) in series;
the first pull-up switch (K11) and the second pull-up switch (K12) are synchronous switches;
the first pull-down switch (K21) and the second pull-down switch (K22) are synchronous switches;
the first pull-up switch (K11), the second pull-up switch (K12), the first pull-down switch (K21) and the second pull-down switch (K22) act synchronously, and the third switch (K3) and the fourth switch (K4) act synchronously; the first pull-up switch (K11), the second pull-up switch (K12), the first pull-down switch (K21) and the second pull-down switch (K22) are combined to form a synchronous four-pole four-throw switch; the third switch (K3) and the fourth switch (K4) are combined to form a synchronous double-pole double-throw switch;
when the first pull-up switch (K11), the second pull-up switch (K12), the first pull-down switch (K21) and the second pull-down switch (K22) are all closed, and the third switch (K3) and the fourth switch (K4) are disconnected, the device a connected with the power supply port can only be used as a power receiving device, the device B connected with the power receiving port can only be used as a power supply device, so that the device B can charge the device a through the connecting line, and the power supply and receiving direction of the connected electronic device is determined.
2. The Type-C to Type-C connection line with selectable power supply directions according to claim 1, further comprising a first resistor (R1), wherein the DC power supply node is connected to the first pull-up switch (K11) and the second pull-up switch (K12) through the first resistor (R1), respectively.
3. The Type-C to Type-C connection line with selectable power supply directions according to any one of claims 1 to 2, characterized by further comprising a second resistor (R2); any one of the grounding wires connected with the power supply port and the power receiving port is respectively connected with a first pull-down switch (K21) and a second pull-down switch (K22) through a second resistor (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330415.4A CN111209237B (en) | 2019-12-20 | 2019-12-20 | Type-C of optional power supply direction changes Type-C connecting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330415.4A CN111209237B (en) | 2019-12-20 | 2019-12-20 | Type-C of optional power supply direction changes Type-C connecting wire |
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| Publication Number | Publication Date |
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| CN111209237A CN111209237A (en) | 2020-05-29 |
| CN111209237B true CN111209237B (en) | 2023-02-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107544934B (en) * | 2017-09-07 | 2020-07-07 | 龙迅半导体（合肥）股份有限公司 | Two-way signal conditioning chip and USBType-C cable of USBType-C cable |
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| CN111209237A (en) | 2020-05-29 |
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