WO2021057528A1

WO2021057528A1 - Type a-type c cable and cable chip thereof

Info

Publication number: WO2021057528A1
Application number: PCT/CN2020/115079
Authority: WO
Inventors: 陶红霞
Original assignee: 上海爻火微电子有限公司
Priority date: 2019-09-25
Filing date: 2020-09-14
Publication date: 2021-04-01
Also published as: CN110534988A

Abstract

A Type A-Type C cable and a cable chip (3) thereof. The cable chip (3) comprises a processing module (33), a first pull-up resistor (32), a first switching device (34), a chip CC1 pin (31), and a chip VBUS pin; the chip CC1 pin (31) is externally connected to a CC cable (4); the chip VBUS pin is connected to the VBUS pin (12) of an A plug (1); the chip CC1 pin (31) is connected to the processing module (33); the processing module (33) can supply power by means of the chip VBUS pin; after being connected with the first switching device (34) in series, the first end of the first pull-up resistor (32) is connected to the chip VBUS pin, a second end is connected to the chip CC1 pin (31), and the first switching device (34) is controlled by the processing module (33). The chip (3) can compatibly realize the circuit configuration of a standard Type A-Type C cable, and the circuit configuration of the Type A-Type C cable for USB PD fast charging.

Description

Type A-Type C cable and its cable chip

Technical field

The present invention relates to the field of cables, and in particular to a Type A-Type C cable and its cable chip.

Background technique

USB PD, specifically: USB Power Delivery, can be understood as a power transmission protocol. It is a fast charging specification formulated by the USB-IF organization, which in turn can support higher power fast charging.

Due to various considerations (such as cost and compatibility with old products), most of the existing charging equipment still uses Type A female sockets. Furthermore, cables with different connectors can be used between Type C interface equipment and charging equipment. One end of the cable uses a Type A male connector, and the other end uses a Type C male connector. Therefore, it can also be understood as a Type A-Type C cable.

In the related art, part of the Type A-Type C cable for fast charging of USB PD, the CC pin of the Type C male connector and the CC pin of the Type A male connector can be connected by a CC line, and the CC line can be connected to the CC pin of the Type A male connector. Electronic label circuit connection; the other part of the Type A-Type C cable that is not used to implement USB PD (such as the common standard Type A-Type C cable) does not need to use the CC line, and the corresponding CC pin needs to be separately Do processing. It can be seen that the existing cables cannot balance the cable structure for realizing USB PD fast charging and the cable structure of standard cables.

Summary of the invention

The present invention provides a Type A-Type C cable and its cable chip to solve the problem that the cable structure for realizing USB PD fast charging and the cable structure of a standard cable cannot be balanced.

According to the first aspect of the present invention, a cable chip for a Type A-Type C cable is provided, and the Type A-Type C cable is provided with a Type A male connector, a Type C male connector, and a CC cable, The Type A male head has a head A CC pin and a head A VBUS pin, the Type C male head has a C head CC pin and a C head VBUS pin; the CC line connects the A head CC pin and the C head CC pin, the VBUS pin of the A head is used to connect to the power supply voltage, and the VBUS pin of the A head is connected to the VBUS pin of the C head;

The cable chip includes a processing module, a first pull-up resistor, a first switching device, a chip CC1 pin and a chip VBUS pin; the chip CC1 pin is externally connected to the CC line, and the chip VBUS pin is connected to the A head VBUS pin, the CC1 pin of the chip is connected to the processing module; the processing module can be powered by the VBUS pin of the chip;

The first end of the first pull-up resistor connected in series with the first switching device is connected to the VBUS pin of the chip, and the second end is connected to the CC1 pin of the chip, and the first switching device is controlled by the processing module .

Optionally, the processing module includes a single-wire and electronic label digital unit and a level conversion unit; the chip CC1 pin is connected to the input and output pins of the single-wire and electronic label digital unit;

The single-wire and electronic label digital unit is connected to the first switching device through the level conversion unit to control the on-off of the first switching device.

Optionally, the power supply pin of the single-wire and electronic label digital unit is connected to the VBUS pin of the chip through the step-down unit.

Optionally, the first switching device is configured to be in a conducting state by default.

Optionally, the first switching device includes a first PMOS, the gate of the first PMOS is connected to the processing module, and the gate of the first PMOS is grounded through a pull-down resistor, and the source of the first PMOS is The electrode is connected to the VBUS pin of the chip, and the drain of the first PMOS is connected to the CC1 pin of the chip through the first pull-up resistor.

Optionally, the cable chip further includes a second switch device and a second pull-up resistor, the cable chip further includes a chip CC2 pin, and the chip CC2 pin is connected to the C in the Type C male header. Head VCONN feet;

The first end of the second switching device connected in series with the second pull-up resistor is connected to the VBUS pin of the chip, the second end is connected to the CC2 pin of the chip, and the second switching device is controlled by the processing module .

Optionally, the CC2 pin of the chip is also connected to the processing module.

Optionally, the second switching device is configured to be in an off state by default.

Optionally, the second switching device includes a second PMOS, the gate of the second PMOS is connected to the processing module, the source of the second PMOS is connected to the VBUS pin of the chip, and the second PMOS is The drain of the second PMOS is connected to the VCONN pin of the C head through the second pull-up resistor, and a third pull-up resistor is connected between the gate and the source of the second PMOS.

According to the second aspect of the present invention, a Type A-Type C cable is provided, including the cable chip involved in the first aspect and its optional solutions.

The Type A-Type C cable and its cable chip provided by the present invention are connected to the VBUS pin of the chip through the first end of the first pull-up resistor in series with the first switching device, and the second end is connected to the VBUS pin of the chip. The CC1 pin of the chip can be connected to the chip VBUS through the first pull-up resistor through the conduction of the first switching device, which can meet the requirements when the CC1 pin of the chip is not used for USB PD fast charging, and then The present invention can be compatible to realize the circuit structure of the standard Type A-Type C cable; at the same time, the first switching device can also be turned off, so that the processing module can interact with the connected electronic equipment through the CC1 pin of the chip, based on the interaction Communication, for example, can realize the function of electronic tag and single-wire communication, and furthermore, the present invention can be compatible with the circuit structure of Type A-Type C cable that realizes USB PD fast charging.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram 1 of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention;

FIG. 2 is a second schematic diagram of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention;

FIG. 3 is a schematic diagram three of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention;

4 is a schematic diagram 4 of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention;

5 is a schematic diagram five of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention;

Fig. 6 is a sixth structural diagram of a cable chip of a Type A-Type C cable in an embodiment of the present invention.

Description of reference signs:

1-Type A male header;

11-A head and CC feet;

12-A head VBUS pin;

2-Type C male header;

21-C head CC feet;

22-C head VBUS pin;

23-C head VCONN pin;

3-cable chip;

31-chip CC1 pin;

32-The first pull-up resistor;

33-Processing module;

331-Single line and electronic label digital unit;

332-level conversion unit;

333-step-down unit;

34-The first switching device;

35- The second switching device;

36-chip CC2 pin;

37-The second pull-up resistor;

38-input buffer;

4-CC line.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used Describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

The technical solutions of the present invention will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 1 is a schematic diagram 1 of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention.

The Type A-Type C cable involved in this embodiment can be connected between the charging device and the device to be charged.

The device to be charged can be understood as any electronic device with a Type C socket, for example, it can be a computer, a tablet, a mobile phone, a vehicle-mounted device, or any other electronic device with a Type C socket.

The charging device can be any power supply device that is suitable for USB PD charging and adopts Type A female socket. It can be dedicated to charging, such as travel adapters, mobile power supplies, power sockets, car cigarette lighters, The charger, etc., may also be an electronic device that is not dedicated to charging but can be used for charging, for example, it may be a computer, a tablet, a mobile phone, a vehicle-mounted device, or any other electronic device that can charge other devices.

The travel adapter can be understood as an AC to DC conversion power supply product, which can be a standard accessory in the mobile phone packaging box. The charger can be understood as various power products that can supply power to electronic devices such as mobile phones.

Please refer to Figure 1. The Type A-Type C cable has a Type A male connector 1 and a Type C male connector 2, and a CC line 4. The Type A male connector 1 has a head A, a CC pin 11 and a head A VBUS pin 12, the Type C male head 2 has a C head CC pin 21 and a C head VBUS pin 22; the CC line 4 connects the A head CC pin 11 and the C head CC pin 21, and the A head The VBUS pin 12 is used to connect to a power supply voltage, which can be represented by, for example, VBUS. The VBUS pin of the A head is connected to the VBUS pin of the C head, and the voltage of the VBU pin of the A head and the VBUS pin of the C head may be the same. of.

At the same time, Type A male head 1 may also have head A D+ feet and head A D- feet not shown in Figure 1, and Type C male head 2 may also have head C D+ feet not shown in Figure 1. The feet are connected to the C head and D- feet, of which the A head D+ foot can be connected to the C head D+ foot, and the A head D- foot can be connected to the C head D- foot.

Please refer to Figure 1. In this embodiment, the cable chip 3 of the Type A-Type C cable includes: a processing module 33, a first pull-up resistor 32, a first switching device 34, a chip CC1 pin 31, and a chip VBUS pin 33.

The chip CC1 pin 31 is externally connected to the CC line 4, the chip VBUS pin 33 is connected to the A head VBUS pin 12, and the chip CC1 pin 31 is connected to the processing module 33; the processing module 33 can pass all The VBUS pin 33 of the chip is described for power supply. At the same time, this embodiment does not exclude an implementation manner in which the processing module 33 also supplies power through other pins.

The first end of the first pull-up resistor 32 connected in series with the first switching device 34 is connected to the chip VBUS pin 33, the second end is connected to the chip CC1 pin 31, and the first switching device 34 is controlled In the processing module 33.

In the above embodiment, when the first switching device 34 is turned on, the chip VBUS pin 33 and the chip CC1 pin 31 can be turned on via the first pull-up resistor 32, so that the chip CC1 pin can pass through the first pull-up resistor 32. It is connected to pin 33 of VBUS of the chip.

In response to this, it should be pointed out that in the standard Type A-Type C cables provided by some companies, the USB PD fast charging function is not configured. Among them, the Type A male connector is not equipped with CC pins, and therefore is not configured. The CC line is configured, and the C-head CC pin of the Type C male connector and the C-head VBUS pin can be connected together through a pull-up resistor. In this embodiment, the realization of its function is configured in the cable chip 3. It can be seen that when the first switching device 34 is turned on, this embodiment can realize the requirement when the pin CC1 of the chip is not used for USB PD fast charging, and the above embodiments can be compatible with circuits that implement this type of standard Type A-Type C cable. structure.

In the above embodiment, when the first switching device 34 is turned off, the chip VBUS pin 33 and the chip CC1 pin 31 can be disconnected. At this time, the processing module can connect to the connected electronics through the chip CC1 pin and the A head CC pin. Device interactive communication, based on the interactive communication, for example, the function of electronic tag and single-wire communication can be realized.

In a specific example, the resistance of the first pull-up resistor 32 may be, for example, 56K ohms.

In response to this, it should be pointed out that in the Type A-Type C cable for USB PD fast charging provided by some companies, the VBUS pin of the A head can supply power to the electronic label chip when receiving power, and the CC line can be connected with The electronic label chip communicates interactively, supports USB PD communication and realizes functions such as cable identification. Furthermore, the above embodiments are compatible with the circuit structure of the Type A-Type C cable that realizes this type of USB PD fast charging.

It can be seen that with regard to the CC pins involved above, CC is specifically: Configuration Channel, and the CC pins can be specifically understood as: configuration channel pins. Through the CC pin, it is convenient to support USB PD communication and realize functions such as cable identification. Correspondingly, the processing module mentioned above can be understood as any circuit module that can cooperate with the CC pin to realize the corresponding function, so it can correspond to the corresponding function of the electronic label chip in the prior art.

FIG. 2 is a second schematic diagram of the structure of the cable chip of the Type A-Type C cable in an embodiment of the present invention.

Please refer to FIG. 2, in one embodiment, the processing module 33 includes a single-wire and electronic label digital unit 331 and a level conversion unit 332; the chip CC1 pin 31 is connected to the input of the single-wire and electronic label digital unit 331 Output pin; the single-wire and electronic label digital unit 331 is connected to the first switching device 34 through the level conversion unit 332 to control the on and off of the first switching device 34.

The single-wire and electronic tag digital unit 331 is specifically One Wire&eMarker Digital Block.

One Wire can be understood as the function of single-wire communication. It can be understood as the communication that can be completed by using a single signal wire in accordance with the pre-appointed communication rate, signal specification and master-slave mode when digital signal communication between devices. the way.

The eMarker can be understood as an electronic tag, which can be understood with reference to the function of the electronic tag chip in the related art.

It can be seen that it can realize the function of single-wire communication and the function of electronic tags. Any circuit unit that realizes the above functions through software and/or hardware does not depart from the description of this embodiment, and is compatible with most Type A-Type C lines. The circuit structure of the cable.

For example: the single-wire communication function and the electronic label function can be realized by hardware. Another example: if the single-wire and electronic label digital unit 331 subtracts the single-wire communication function part in the digital unit, it can only be realized by the electronic label digital unit with software. Realize the main functional part of the present invention; for another example: if the single-line and electronic tag digital unit 331 subtracts the electronic tag functional part in the digital unit, with software, the main functional part of the present invention can be realized only through the single-wire communication unit.

In addition, the optional solution of this embodiment can also implement part of the functions of the HV LDO through the single-wire and electronic tag digital unit 331.

At the same time, in the above embodiments, the single-wire and electronic label digital unit 331 can also have the function of controlling the on and off of the first switching device 34 through the level conversion unit 332. Specifically, the first switching device 34 can be controlled to be turned on and off in response to the triggering of the corresponding buttons and switches in the cable, or the first switching device 34 can be automatically controlled to be turned on and off; for example, the cable chip 3 The specific continuous logic level received on pin 31 of the chip CC1 can be interpreted by the internal single-wire and electronic label digital unit 331 to connect the pull-up resistor (i.e. the first pull-up resistor 32) from pin 31 of the chip CC1 to the VBUS. Automatic configuration on or off.

The level conversion unit 332 may specifically refer to the Level Translator, which can be understood as being capable of level conversion so that the signal output by the digital unit can be converted and applied to the circuit unit that controls the first switching device 34. Specifically, because The output signal level of the single-wire and electronic label digital unit does not match the level of the signal controlled by the first switching device, so it needs to be converted. For example, when the signal of a 3.3V digital circuit (such as single-wire and electronic label When the output signal of the digital unit 331 is communicated with the signal of the analog circuit working at 20V (for example, the controlled signal of the first switching device), the level conversion unit 332 mentioned above can be used for level conversion.

Wherein, the level conversion unit 332 can also be connected to the VBUS pin of the chip to receive its power supply.

FIG. 3 is a schematic diagram 3 of the structure of the cable chip of the Type A-Type C cable in an embodiment of the present invention.

Please refer to FIG. 3. In one embodiment, the power supply pin of the single-wire and electronic tag digital unit 331 is connected to the VBUS pin 33 of the chip through the step-down unit 333.

Furthermore, the step-down unit 333 can perform step-down processing on the power supply from the chip VBUS pin 33 and supply it to the single-wire and electronic tag digital unit 331. The step-down unit 333 can specifically be an HV LDO, that is, a high-voltage linear step-down unit. The LDO specifically refers to low drop output.

At the same time, in other embodiments, since the single-wire communication technology has the ability to take power from the data line, for scenarios that only require single-wire communication for identification and authentication, the cable chip may not use a high-voltage linear step-down unit to reduce The cost of this integrated solution and product power consumption.

In response to this, it needs to be specifically explained: because conventional electronic label devices (ie eMarker) can shake hands with the USB source device (ie, power supply device or host device) through the CC pin and VCONN pin of the Type C female socket, and then the USB source The VCONN pin of the device supplies power to the electronic label device; however, since the customized Type A male connector only supports one CC pin for CC communication, the Type A male connector does not have a VCONN pair for single-wire and electronic label digital circuits similar to electronic label devices. 331 power supply, so it is necessary to use VBUS to supply power to the single-wire and electronic label digital circuit 331 in the cable chip. Considering that VBUS can reach up to 20V, it is necessary to additionally use the above-mentioned high-voltage-resistant linear step-down unit (ie: HV LDO).

4 is a schematic diagram 4 of the structure of the cable chip of the Type A-Type C cable in an embodiment of the present invention.

Please refer to FIG. 4, in one of the embodiments, the cable chip 3 further includes a second switch device 35 and a second pull-up resistor 37, and the cable chip 3 further includes a chip CC2 pin 36, the The CC2 pin 36 of the chip is connected to the C header VCONN pin 23 in the Type C male header 2.

The first end of the second switch device 35 connected in series with the second pull-up resistor 37 is connected to the chip VBUS pin 33, the second end is connected to the chip CC2 pin 36, and the second switch device 35 is controlled In the processing module 33.

When the second switching device 35 is turned on, the chip VBUS pin 33 and the chip CC2 pin 36 can be turned on via the second pull-up resistor 37, so that the chip CC2 pin can be connected to the chip VBUS via the second pull-up resistor 37. Feet 33.

In response to this, it should be pointed out that in another non-standard Type A-Type C cable that is not equipped with USB PD fast charging function provided by some companies, the Type A male connector is not equipped with CC pin, and therefore it is not configured. The CC line is configured, and the VCONN pin of the Type C male connector and the VBUS pin of the C connector can be connected together through a pull-up resistor. In this embodiment, the realization of its function can also be configured in the cable chip 3 It can be seen that when the second switching device 34 is turned on, the above embodiments can be compatible to realize the circuit structure of this type of non-standard Type A-Type C cable.

In the above embodiment, when the second switch device 35 is turned off, the chip VBUS pin 33 and the chip CC2 pin 36 can be disconnected.

In response to this, it should be pointed out that in the USB PD fast charging Type A-Type C cables provided by some companies and the non-fast charging Type A-Type C cables, the VCONN pin of the C head may not be pulled up to The C-head VBUS pin, and the above embodiments are compatible to realize the circuit structure of these Type A-Type C cables.

Fig. 5 is a schematic diagram of the structure of a cable chip of a Type A-Type C cable in an embodiment of the present invention.

Please refer to FIG. 5. In this embodiment, the second switching device 35 can be controlled by the single-wire and electronic tag digital unit 331 via the level conversion unit 332.

In the above embodiments, the single-wire and electronic label digital unit 331 can also have the function of controlling the on and off of the second switching device 35 through the level conversion unit 332. Specifically, the second switch device 35 can be controlled to be turned on and off in response to the triggering of the corresponding button and switch in the cable, or the second switch device 35 can be automatically controlled to be turned on and off; for example, the cable chip 3 After the specific continuous logic level received on pin 31 of the chip CC1 is interpreted by the internal single-wire and electronic label digital unit 331, the pull-up resistor from pin 36 of the chip CC2 to the VBUS (ie, the second pull-up resistor 37) Perform automatic configuration of connected or unconnected.

In the specific implementation process, the chip CC2 pin 36 is also connected to the processing module 33, specifically connected to the single wire and electronic label digital unit 331 therein, and further, the chip CC2 pin 36 can be reserved to support logic level input when used alone. .

Furthermore, the chip CC2 pin 36 can be connected to the processing module 33 via the input buffer 38, specifically connected to the single-wire and electronic label digital unit 331, and the input buffer 38 can have a comparison function. Furthermore, an input buffer with a comparator function can be used to reserve the CC2 pin of the chip to be used alone, and it can also support logic level input and analog level comparison judgment input.

At the same time, the input buffer 38 may not be used in this embodiment, the input buffer may also be configured as a buffer without a comparison function, or the input buffer may be replaced with other devices. No matter what kind of change, it will not deviate from the original Description of the embodiment.

Please refer to Figure 6, you can use Buffer&Comp to characterize the input buffer with comparator function.

In one of the embodiments, the first switching device 34 may be configured to be in the on state by default.

Please refer to FIG. 6, where Rp1 may be used to characterize the first pull-up resistor 32; in a specific example, the first switching device 34 may include a first PMOS, which may be shown as P1 in FIG. The gate of a PMOS is connected to the processing module, and the gate of the first PMOS is grounded through a pull-down resistor R1, the source of the first PMOS is connected to the VBUS pin of the chip, and the drain of the first PMOS is It is connected to the CC1 pin of the chip via the first pull-up resistor Rp1. Wherein, the gate of the first PMOS can be specifically connected to the single-wire and electronic label digital unit 331 via the level conversion unit 332

It can be seen that the grounding of the pull-down resistor R1 can be used to make the first switching device in the conducting state by default. Furthermore, the pull-down resistor R1 ensures that the single-wire and electronic tag digital unit 331 keeps the first PMOS turned on by default without receiving a specific command from a charging device such as a charger or a mobile phone or a charging device to be charged, so that Type C The C head CC pin of the male head can keep the first pull-up resistor Rp1 hanging on VBUS.

In one of the embodiments, the second switching device 35 may be configured to be in the off state by default.

Please refer to FIG. 6, where Rp2 may be used to characterize the second pull-up resistor 37; in a specific example, the second switching device 35 may include a second PMOS, which may be shown as P2 in FIG. 6; The gates of two PMOSs are connected to the processing module, the source of the second PMOS is connected to the VBUS pin of the chip, and the drain of the second PMOS is connected to the C header through the second pull-up resistor Rp2 On the VCONN pin, a third pull-up resistor R2 is connected between the gate and the source of the second PMOS. Among them, the gate of the first PMOS can be specifically connected to the single-wire and electronic tag digital unit 331 via the level conversion unit 332.

It can be seen that the third pull-up resistor R2 can be used to ensure that the second switching device is in the off state by default, to ensure that when the cable involved in this embodiment is used to implement the circuit structure of the standard Type A-Type C cable, the C head The second pull-up resistor Rp2 of the VCONN pin is not pulled to VBUS at this time, so as to ensure that when the CC1 pin of the chip is not connected to a specific digital signal for operation, the Type A-Type C cable is configured to the standard Type A by default -Type C cable.

In the above embodiments, the default conduction of the first PMOS and the default disconnection of the second PMOS are realized through two PMOSs, a pull-down resistor, and a third pull-up resistor.

In other optional implementation manners, in the absence of a level conversion unit, other circuits may also be used to implement the default configuration and on-off state control. Specifically, for each PMOS, the corresponding NMOS and resistor can be combined to achieve the default configuration, that is: for the first pull-up resistor Rp1, the chip CC1 pin, two NMOS, one PMOS and two resistors can be used to achieve the default configuration And on-off control, the PMOS can be similar to the first PMOS mentioned above, and then can be connected in series with the first pull-up resistor; for the second pull-up resistor Rp2, chip CC2 pin, one NMOS, one PMOS and One resistor implements the default configuration and on-off control, and the PMOS can be similar to the second PMOS mentioned above, and can be connected in series with the second pull-up resistor.

For the default conduction of the first switching device, for example, the drains of the two NMOSs are connected to VBUS through resistors, the sources of the two NMOSs can be directly connected to the ground, and the drain of the first NMOS can be connected to the second The gates of two NMOSs, the drain of the second NMOS can be connected to the gate of the first PMOS, and the gate of the first NMOS is connected to the logic output of the single wire and the digital unit of the electronic tag, so as to realize the default conduction; The default of the second switching device is off, the source of the NMOS is grounded, the gate of the NMOS is connected to the logic output of the single wire and the digital unit of the electronic label, and the drain of the NMOS is connected to VBUS through a resistor and the drain is also connected to the second The gate of the PMOS is turned off by default.

At the same time, in the embodiment shown in FIG. 6, the cable chip 3 can use an integrated circuit with four pins (that is, using the chip VBUS pin, the chip CC1 pin, the chip CC2 pin, and the GND pin) to implement the method described in this embodiment. The cable chip involved ensures that the cost is minimized.

In the specific implementation process, the maximum working voltage of VBUS in the USB Type C specification can reach 20V, so the VBUS pin of the cable chip 3, the chip CC1 pin, and the chip CC2 pin can withstand voltages above 20V, and the expected withstand voltage is 30V.

It can be seen that the above specific implementation manners can be compatible to realize the following circuit structures of various Type A-Type C cables:

For the first type of cable, it can be regarded as a standard Type A-Type C cable that does not realize fast charging. There is no CC pin in the Type A male connector, and the CC pin of the Type C male connector is pulled up. The resistor is pulled up to the VBUS pin. An alternative implementation of this embodiment can realize the first type of cable compatible by controlling the first switching device 34 to be turned on and the second switching device 35 to turn off;

For the second type of cable, it can be regarded as another Type A-Type C cable that does not realize fast charging. The Type A male connector does not have a CC pin, and the CC pin of the Type C male connector is connected. The pull-up resistor is pulled up to the VBUS pin, and the VCONN pin of the Type C male header is pulled up to the VBUS pin by the pull-up resistor. The VCONN pin corresponds to the device with the Type C female socket (ie, the device to be charged for a smart phone) For the other CC pin (ie CC1 or CC2 pin), the alternative method of this embodiment can be compatible with the realization of the second type of cable by controlling both the first switching device 34 and the second switching device 35 to be turned on.

For the third type of cable, there is an ID pin (or CC pin) in the Type A male header, and the ID pin (or CC pin) can be connected to the one-wire communication authentication chip (One Wire Authenticator) in the cable. Among them, the CC pin of the Type C male header is pulled up to the VBUS pin by a pull-up resistor. The optional method of this embodiment can be achieved by controlling the conduction of the first switching device 34 and the compatibility of the corresponding configuration in the processing module. Cable.

For the fourth type of cable, it can be regarded as a Type A-Type C cable that can realize fast charging. The Type A male connector has a CC pin, which can be connected to the electronic label in the cable. Chip, the optional method of this embodiment can realize the fourth type of cable compatible by controlling both the first switching device 34 and the second switching device 35 to be turned off.

Therefore, different companies currently implement the USB PD protocol or its private fast charging protocol and related cable identification methods are different, resulting in the seemingly consistent Type A-Type C cable that is not compatible when different devices are quickly charged. This caused a waste of cables. However, this embodiment and its optional solutions provide an identifiable and configurable integrated solution applied to cables, which can use the same cable to be more compatible with the fast charging and non-fast charging requirements of devices of different brands.

In summary, the Type A-Type C cable and its cable chip provided in this embodiment are connected to the VBUS pin of the chip through the first end of the first pull-up resistor connected in series with the first switching device. The two ends are connected to the CC1 pin of the chip, and the first switching device can be turned on, so that the CC1 pin of the chip can be connected to the chip VBUS through the first pull-up resistor, which can satisfy the requirement that the CC1 pin of the chip is not used for USB PD fast charging. Therefore, the present invention can be compatible with the circuit structure of the standard Type A-Type C cable; at the same time, the first switching device can also be turned off, so that the processing module can communicate with the connected electronic device through the CC1 pin of the chip. Based on this interactive communication, for example, the function of electronic tag and single-wire communication can be realized, and the present invention can be compatible with the circuit structure of the Type A-Type C cable that realizes USB PD fast charging.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A cable chip for a Type A-Type C cable. The Type A-Type C cable is provided with a Type A male connector and a Type C male connector, and a CC cable. The Type A male connector has an A connector CC The Type C male has a C-head CC pin and a C-head VBUS pin; the CC line connects the A-head CC pin and the C-head CC pin, and the A-head VBUS pin is used for When the power supply voltage is connected, the VBUS pin of the A head is connected to the VBUS pin of the C head; it is characterized in that the cable chip includes a processing module, a first pull-up resistor, a first switching device, a chip CC1 pin and a chip VBUS pin; the chip CC1 pin is connected to the CC line, the chip VBUS pin is connected to the A head VBUS pin, the chip CC1 pin is connected to the processing module; the processing module can pass through the chip VBUS pin powered by;

The first end of the first pull-up resistor connected in series with the first switching device is connected to the VBUS pin of the chip, and the second end is connected to the CC1 pin of the chip, and the first switching device is controlled by the processing module .
The cable chip according to claim 1, wherein the processing module comprises a single-wire and electronic label digital unit and a level conversion unit; the chip CC1 pin is connected to the input and output pins of the single-wire and electronic label digital unit ；

The single-wire and electronic label digital unit is connected to the first switching device through the level conversion unit to control the on-off of the first switching device.
The cable chip according to claim 2, wherein the power supply pin of the single-wire and electronic label digital unit is connected to the VBUS pin of the chip through a step-down unit.
The cable chip according to claim 1, wherein the first switching device is configured to be in an on state by default.
The cable chip according to claim 4, wherein the first switching device comprises a first PMOS, the gate of the first PMOS is connected to the processing module, and the gate of the first PMOS is connected through The pull-down resistor is grounded, the source of the first PMOS is connected to the VBUS pin of the chip, and the drain of the first PMOS is connected to the CC1 pin of the chip through the first pull-up resistor.
The cable chip according to any one of claims 1 to 5, further comprising a second switch device and a second pull-up resistor, the cable chip further comprises a chip CC2 pin, and the chip CC2 pin is connected The VCONN pin of the C header in the Type C male header;

The first end of the second switching device connected in series with the second pull-up resistor is connected to the VBUS pin of the chip, the second end is connected to the CC2 pin of the chip, and the second switching device is controlled by the processing module .
The cable chip according to claim 6, wherein the CC2 pin of the chip is also connected to the processing module.
The cable chip according to claim 6, wherein the second switching device is configured to be in an off state by default.
The cable chip according to claim 8, wherein the second switching device comprises a second PMOS, the gate of the second PMOS is connected to the processing module, and the source of the second PMOS is connected to The chip VBUS pin, the drain of the second PMOS is connected to the C head VCONN pin via the second pull-up resistor, and a third pull-up is connected between the gate and the source of the second PMOS resistance.
A Type A-Type C cable, characterized by comprising the cable chip according to any one of claims 1 to 9.