Chip, circuit board and mobile device

Abstract

The invention provides a chip, a circuit board and mobile equipment, relates to the technical field of charging, and can solve the problems of poor integration level, high cost and low software development efficiency of a current mobile phone power transmission protocol chip and switch charging chip separation scheme. The chip comprises a charging sub-chip and a communication sub-chip, the first communication pin and the second communication pin are electrically connected with the communication sub-chip and are used for communication between the communication sub-chip and a charger; and the first power transmission interruption pin is electrically connected with the communication sub-chip and is used for reporting a first power transmission interruption signal to the processor by the communication sub-chip, and the first power transmission interruption signal is used for reporting the working state of the communication sub-chip and the change of the working state to the processor.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of charging technology, and more particularly to a chip, a circuit board and a mobile device. Background Art

[0002] With the rapid development of mobile communication technology and the rapid iteration of mobile phones, mobile phone manufacturers have higher and higher requirements for the cost and integration of mobile phone chips. Battery management system-related chips, which are highly competitive among domestic manufacturers, are particularly sensitive to cost and integration. Figure 1 As shown, the battery management system mainly includes a switch charging chip, a power delivery (PD) protocol chip, a fuel gauge chip, etc. Among them, the switch charging chip usually adopts a switch working mode, works within a wide input voltage range, has the ability to identify the USB (Universal Serial Bus, USB) port type, supports power path management, and supports the charging chip for the mobile phone battery in four charging stages: trickle, pre-charge, constant current and constant voltage; Universal Serial Bus-Power Delivery (USB-PD) is a power supply standard based on USB Type C (Type-C). With the popularity of USB Type C, mainstream mobile phones need to support USB-PD fast charging solutions. The power transmission protocol chip refers to a physical layer chip that supports power transmission protocol communication. Both the switch charging chip and the PD protocol chip can communicate with the mobile phone processor through the Inter-Integrated Circuit (I2C) bus, such as the PD protocol chip can communicate with the Type C connector through CC1 and CC2.

[0003] At present, the solutions for switch charging chips and power transmission protocol chips on the mobile phone side are mainly discrete solutions. Figure 1 As shown, the mobile phone processor can control the power transmission protocol chip to implement the power control protocol communication requesting the charger to adjust the charging voltage VBUS, and control the switch charging chip to charge the battery, such as Figure 1 As shown in VBAT, the system can also be powered. Figure 1 As shown in VSYS. The discrete solution will bring the following problems:

[0004] (1) The switch charging chip and the power transmission protocol chip need to be produced, packaged, and tested separately, resulting in high wafer cost, packaging cost, and testing cost. In addition, both the switch charging chip and the power transmission protocol chip require peripheral devices, resulting in a larger layout area for the discrete solution. Therefore, the chip manufacturing cost and board-level cost of the discrete solution are both high.

[0005] (2) The power transmission protocol chip and the switch charging chip may be products of different suppliers or products produced by different foundries of the same supplier. This may cause the parameters of the two chips to have large deviations and poor consistency due to the influence of temperature, process and other conditions, which will lead to insufficient reliability of the discrete solution.

[0006] (3) The functions of the power transmission protocol chip, such as requesting the charger to flexibly output charging power, usually have close software interaction logic with the switch charging chip. The discrete solution requires debugging the software drivers of the two chips separately, and then merging and debugging them after the debugging is completed. This will bring a large software workload, increase debugging time, low efficiency, and increase labor cost investment. Summary of the invention

[0007] The embodiments of the present application provide a chip, a circuit board and a mobile device, which can solve the problems of poor integration, high cost and low software development efficiency of the current discrete solutions of mobile phone power transmission protocol chips and switch charging chips.

[0008] In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0009] In a first aspect, a chip is provided, the chip comprising:

[0010] Charging sub-chip and communication sub-chip;

[0011] A first communication pin and a second communication pin, the first communication pin and the second communication pin are electrically connected to the communication sub-chip, and are used for the communication sub-chip to communicate with the charger;

[0012] The first power transmission interrupt pin is electrically connected to the communication sub-chip, and is used for the communication sub-chip to report a first power transmission interrupt signal to the processor. The first power transmission interrupt signal is used to report the working status and changes in the working status of the communication sub-chip to the processor.

[0013] In a possible design solution, the chip may further include:

[0014] The bus is electrically connected to the charging sub-chip and the communication sub-chip, and is used for the charging sub-chip and the communication sub-chip to communicate with the processor, and the processor assigns different addresses to the charging sub-chip and the communication sub-chip respectively.

[0015] Optionally, the communication sub-chip does not support the function of supplying power to the cable with the electronic tag (VCONN function).

[0016] Furthermore, the chip may also include:

[0017] A first power input pin, the first power input pin is electrically connected to the charger and the charging sub-chip;

[0018] A first power output pin and a second power output pin, the first power output pin and the second power output pin are electrically connected to the charging sub-chip, the first power output pin is used for the charging sub-chip to power the system, and the second power output pin is used for the charging sub-chip to charge the battery;

[0019] The first charging interrupt pin is electrically connected to the charging sub-chip and is used for the charging sub-chip to report a first charging interrupt signal to the processor. The first charging interrupt signal is used to report the working status and changes of the working status of the charging sub-chip to the processor.

[0020] In a second aspect, a circuit board is provided, comprising: a processor, and a chip as described in any design scheme of the first aspect, wherein the processor is used to control the operation of the chip.

[0021] In a possible design, the circuit board is provided with a first patch position and a second patch position;

[0022] Among them, the first patch position is idle, and the second patch position is used to set the chip of this application.

[0023] Optionally, the circuit board may further include:

[0024] A first 0 ohm resistor, the first 0 ohm resistor is used to electrically connect the first communication pin and the charger;

[0025] A second 0 ohm resistor, the second 0 ohm resistor is used to electrically connect the second communication pin and the charger;

[0026] A third 0-ohm resistor is used to electrically connect the first power transmission interrupt pin and the processor.

[0027] In another possible design, the circuit board is provided with a first patch position and a second patch position;

[0028] Among them, the first patch position is used to set the communication chip, and the second patch position is used to set the charging chip. The charging chip has the same function as the charging sub-chip, and the communication chip has the same function as the communication sub-chip.

[0029] Optionally, the charging chip includes:

[0030] A second power input pin, the second power input pin is electrically connected to the charger;

[0031] A third power output pin and a fourth power output pin, the third power output pin is used for the charging chip to power the system, and the fourth power output pin is used for the charging chip to charge the battery;

[0032] a second charging interrupt pin, the second charging interrupt pin is electrically connected to the processor and is used for the charging chip to report a second charging interrupt signal to the processor, the second charging interrupt signal is used to report the working state of the charging chip and changes in the working state to the processor; and

[0033] Communication chips include:

[0034] A third communication pin and a fourth communication pin, the third communication pin and the fourth communication pin are electrically connected to the charger;

[0035] A second power transmission interrupt pin, the second power transmission interrupt pin is electrically connected to the processor and is used for the communication chip to report a second power transmission interrupt signal to the processor, and the second power transmission interrupt signal is used to report the working state of the communication chip and changes in the working state to the processor; and

[0036] The circuit board also includes:

[0037] A third patch position, the third patch position is used to set a first 0 ohm resistor, and the first 0 ohm resistor is used to electrically connect the first communication pin and the charger;

[0038] A fourth patch position, the fourth patch position is used to set a second 0 ohm resistor, and the second 0 ohm resistor is used to electrically connect the second communication pin and the charger;

[0039] A fifth patch position, the fifth patch position is used to set a third 0 ohm resistor, and the third 0 ohm resistor is used to electrically connect the first power transmission interrupt pin and the processor;

[0040] Among them, the third patch position, the fourth patch position and the fifth patch position are idle.

[0041] In a third aspect, a mobile device is provided, comprising a circuit board as described in any design scheme of the second aspect.

[0042] Based on the chip, circuit board and mobile device provided in the embodiments of the present application, the power transmission protocol chip and the switch charging chip can be integrated into the same chip, and some pins can be reused, which can greatly reduce the chip cost (15%) and packaging cost (30%), and effectively save the mobile phone layout area and the number of peripheral devices, reduce the layout area by 15%, and greatly improve the software debugging efficiency of the switch charging chip and the power transmission protocol chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Some specific embodiments of the present application will be described in detail in an illustrative and non-restrictive manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0044] Figure 1 It is a structural diagram of a mobile phone battery management system;

[0045] Figure 2 A pin diagram of a chip provided in an embodiment of the present application;

[0046] Figure 3 This is the pin diagram of the mainstream 3A / 3.78A QFN-24 switch charging chip;

[0047] Figure 4 An application block diagram of the chip provided in the embodiment of the present application;

[0048] Figure 5 A schematic diagram of the structure of a circuit board provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0050] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0051] The terms "first" and "second" and the like in the specification and drawings of this application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0052] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0053] Figure 2 A schematic diagram of the pins of a chip provided in an embodiment of the present application. Figure 2 As shown, the chip includes: a charging sub-chip and a communication sub-chip ( Figure 2 are not shown);

[0054] The first communication pin ( Figure 2 The second communication pin (CC1, pin 8) Figure 2 Marked as CC2, pin 10), the first communication pin and the second communication pin are electrically connected to the communication sub-chip, and are used for the communication sub-chip to communicate with the charger;

[0055] The first power transfer interrupt pin ( Figure 2 Marked as nINT2 / STAT, pin 4), the first power transmission interrupt pin is electrically connected to the communication sub-chip, and is used for the communication sub-chip to report a first power transmission interrupt signal to the processor. The first power transmission interrupt signal is used to report the working status and changes of the working status of the communication sub-chip to the processor. The processor can adjust the operation of the charger through the communication sub-chip according to the first power transmission interrupt signal, such as changing the output power of the charger to meet the charging / power supply requirements.

[0056] Among them, the charging sub-chip can be a chip particle (die) that supports the switch charging function, such as a chip particle with the function of a 3A / 3.78A QFN-24 switch charging chip, and the communication sub-chip can be a chip particle that performs power transmission protocol communication with the charging head.

[0057] The following describes in detail the chip provided in the embodiment of the present application by taking how to integrate the relevant functions of the communication chip into the switch charging chip to realize the functions of the chip provided in the embodiment of the present application as an example.

[0058] Figure 3 This is a pin diagram of the mainstream 3A / 3.78AQFN-24 switch charging chip. Figure 3 As shown, pin 8 and pin 10 are non-connected (NC), that is, pin 8 and pin 10 are spare pins and are not used. Figure 2 , pin 8 and pin 10 can be reused to implement the first communication pin and the second communication pin of the power transmission protocol ( Figure 2 In other words, the embodiment of the present application uses two NC pins to realize the functions of the first communication pin and the second communication pin of the power transmission protocol chip. Since the two NC pins are not defined in the mainstream solution, the realization of the CC function has no effect on other functions of the switch charging chip, and the two NC pins are symmetrically arranged, which is easy to realize the layout of the mobile phone hardware and can be compatible with the existing switch charging solution.

[0059] In addition, because the power transmission protocol related functions require the mobile phone processor to operate frequently during high-power charging, in order to occupy as few mobile phone processor resources as possible, the power transmission protocol related functions need to be reported to the mobile phone processor in an independent interrupt manner, so they cannot be connected to the interrupt pin of the switch charging chip (i.e., the charging interrupt pin, Figure 2 Marked as nINT1, Figure 3 In other words, the indicator light drive pin ( Figure 2 Marked as nINT2 / STAT, Figure 3 Marked as STAT, pin 4) realizes the function of the first power transmission interrupt pin. Since the STAT pin in the pin definition of the mainstream 3A / 3.78AQFN-24 switch charging chip is an open-drain (open-drain) output, which is used to drive the indicator light, and the mainstream mobile phones have cancelled the indicator light design, and the power transmission interrupt also requires an open-drain output, the STAT pin can be reused as a power transmission interrupt pin, and the output port circuit does not need to be changed. It only needs to adjust the internal logic circuit through factory burning. In addition, the technical solution of separately setting the power transmission interrupt pin and the charging interrupt pin can also enable the mobile phone processor to consume fewer resources to locate the event that needs to be processed, and is similar to the software implementation method of the discrete solution, which can simplify the software solution design, reduce the amount of changes, and make software debugging more convenient, so the development efficiency is higher and the cost is lower.

[0060] In a possible design solution, the chip may further include:

[0061] bus( Figure 2 The connection relationship can be referred to in the following Figure 5 ), such as an I2C bus, which is electrically connected to the charging sub-chip and the communication sub-chip, and is used for the charging sub-chip and the communication sub-chip to communicate with the processor, and the processor assigns different addresses to the charging sub-chip and the communication sub-chip, such as an I2C slave address.

[0062] When current mainstream mobile phones use a switch charging chip and a power transmission protocol chip, the two chips share the same I2C bus and have their own I2C secondary addresses. Considering the versatility of software, the embodiment of the present application also allocates two I2C secondary addresses to the charging sub-chip and the communication sub-chip of the chip.

[0063] In addition, the USB Type-C Port Controller (TCPC) protocol specifies the register functions and addresses of 0-6F for USB port control and communication. In order to meet the TCPC protocol regulations and the universality of the driver software, the embodiments of the present application still implement the functions and definitions of these registers in accordance with the TCPC protocol regulations.

[0064] Optionally, the communication sub-chip does not support the function of supplying power to the cable with the electronic tag (VCONN function).

[0065] The current power transmission protocol chip usually integrates VCONN (5V 1A power supply for powering E-MARK (electronic identity tag of USB Type-C cable)) function and VCONN pin, which is used to power E-MARK chip in high-power charging cable (supporting current above 3A) or expansion dock. The application scenarios of PD protocol chip are relatively wide, and can be used in mobile phones, charging heads, notebooks and other charging devices that support power transmission protocol. VCONN is a necessary function in applications such as charging heads and notebooks, but for specific application scenarios such as mobile phone charging, the E-MARK chip in the high-power charging cable is usually powered by VCONN in the charging head, without the need for mobile phone side VCONN, and the VCONN pin is usually suspended or grounded (idle) in the mobile phone hardware design. In addition, the VCONN function specified in the power transmission protocol is only a power supply, and its function definition is not coupled with other functions. Therefore, the embodiment of the present application can delete the VCONN function for the mobile phone side charging scenario to achieve the purpose of cost optimization and pin definition compatibility (the pin utilization rate of the QFN-24 package has reached 100%).

[0066] Further, Figure 4 This is an application block diagram of the chip provided in the embodiment of the present application. This block diagram is an application block diagram of the chip after simplifying the power transmission protocol function provided in the embodiment of the present application. Figure 4 As shown, the chip may also include:

[0067] The first power input pin ( Figure 4 The first power input pin is electrically connected to the charger and the charging sub-chip;

[0068] The first power output pin ( Figure 4The second power output pin is marked as VSYS. Figure 4 The first power output pin and the second power output pin are electrically connected to the charging sub-chip, the first power output pin is used for the charging sub-chip to power the system, and the second power output pin is used for the charging sub-chip to charge the battery;

[0069] First charge interrupt pin ( Figure 4 The first charging interrupt pin is electrically connected to the charging sub-chip, and is used for the charging sub-chip to send the processor ( Figure 4 The host (marked as host in the figure, such as a mobile phone processor) reports a first charging interruption signal, and the first charging interruption signal is used to report the working status and changes of the working status of the charging sub-chip to the processor. The processor can adjust the operation of the charger through the charging sub-chip according to the first charging interruption signal, such as changing the output power of the charger to meet the charging / power supply requirements.

[0070] Among them, the VBUS pin is the power input pin (first power input pin) of the charging sub-chip, and receives the output power from the Type C connector through the overvoltage protection (OVP) module; the VSYS pin is the output pin for powering the system (first power output pin); the VBAT pin is the output pin for the battery (second power output pin); nINT1 is the interrupt pin for charging-related functions (first charging interrupt pin); nINT2 is the interrupt pin for power transmission-related functions (first power transmission interrupt pin); CC1 and CC2 are the communication pins between the mobile phone and the Type C connector (first communication pin and second communication pin). The embodiment of the present application realizes the power supply of the system and the charging of the battery by the Type C port through the power path from VBUS to VSYS and then to VBAT, and realizes the power transmission protocol communication through the CC1 and CC2 pins to request the charging head to adjust the VBUS output power.

[0071] The present application embodiment provides a circuit board, the circuit board comprising: a processor, and Figure 2 or Figure 4 The processor of the chip shown is used to control the operation of the chip, such as powering the system and / or charging the battery.

[0072] Figure 5 A schematic diagram of the structure of a circuit board provided in an embodiment of the present application. The circuit board can be based on the chip integration solution provided in an embodiment of the present application, or can implement a chip discrete solution (switch charging chip + power transmission protocol chip) to achieve hardware compatibility and ensure a stable supply chain.

[0073] In one possible design, Figure 5As shown, the circuit board is provided with a first patch position and a second patch position;

[0074] The first patch position is idle, and the second patch position is used to set the chip of the present application. The term "set" can be understood as a fixed connection, such as welding, or a variable connection, the purpose of which is to install the chip of the present application on the circuit board so that the chip of the present application can establish an electrical connection with the processor and other necessary electronic components set on the circuit board.

[0075] Optionally, the circuit board may further include:

[0076] The first 0 ohm resistor ( Figure 5 The first 0 ohm resistor is used to connect the first communication pin CC1 and the charger ( Figure 5 Marked as Type C connector) electrical connection;

[0077] Second 0 ohm resistor ( Figure 5 The second 0 ohm resistor is used to electrically connect the second communication pin CC2 to the charger;

[0078] The third 0 ohm resistor ( Figure 5 The third 0 ohm resistor is used to connect the first power transfer interrupt pin ( Figure 5 nINT2) and the processor ( Figure 5 marked as related to the mobile phone processor).

[0079] That is to say, if the chip provided in the embodiment of the present application is used, the power transmission protocol chip does not need to be patched (that is, the first patch position is idle). At this time, the first power input pin ( Figure 5 The pin marked as VBUS at the second patch position in the chip is electrically connected to the type C connector to receive power, the CC1 and CC2 pins at the second patch position are connected to CC1 and CC2 of the type C connector through two 0 ohm resistors R1 and R2, and the nINT2 pin is connected to the INT_PD port of the mobile phone processor through a 0 ohm resistor R3. In other words, only the chip provided in the embodiment of the present application can be used as the first supply material to realize the functions of the switch charging chip and the power transmission protocol chip in the existing solution, so as to improve the integration, reduce costs, and improve the efficiency of software development.

[0080] In another possible design, the circuit board is provided with a first patch position and a second patch position;

[0081] Among them, the first patch position is used to set the communication chip, and the second patch position is used to set the charging chip. The charging chip has the same function as the charging sub-chip, and the communication chip has the same function as the communication sub-chip.

[0082] Optionally, the charging chip includes:

[0083] The second power input pin ( Figure 5 The second power input pin is connected to the charger ( Figure 5 Marked as Type C connector) electrical connection;

[0084] The third power output pin ( Figure 5 Not shown, please refer to Figure 1 VSYS) and the fourth power output pin ( Figure 5 Not shown, please refer to Figure 1 The third power output pin is used for the charging chip to power the system, and the fourth power output pin is used for the charging chip to charge the battery;

[0085] The second charging interrupt pin ( Figure 5 The second charging interrupt pin is electrically connected to the processor ( Figure 5 The charging chip is connected to the INT-CHG pin of the mobile phone processor in the charging process, and the charging chip reports a second charging interruption signal to the processor. The second charging interruption signal is used to report the working state of the charging chip and the change of the working state to the processor. The processor can adjust the operation of the charger through the charging chip according to the second charging interruption signal, such as changing the output power of the charger to meet the charging / power supply requirements, etc.; and

[0086] Communication chips include:

[0087] The third communication pin ( Figure 5 The pin marked as CC1 at the first patch position in the Figure 5 The pin marked as CC2 at the first patch position in the middle), the third communication pin and the fourth communication pin are electrically connected to the charger;

[0088] Second power transfer interrupt pin ( Figure 5 The second power transmission interrupt pin is electrically connected to the processor (e.g., electrically connected to the INT_PD pin of the mobile phone processor), and is used for the communication chip to report the second power transmission interrupt signal to the processor. The second power transmission interrupt signal is used to report the working state and the change of the working state of the communication chip to the processor. The processor can adjust the operation of the charger through the communication chip according to the second power transmission interrupt signal, such as changing the output power of the charger to meet the charging / power supply requirements, etc.; and

[0089] The circuit board also includes:

[0090] The third patch position ( Figure 5The third patch position is used to set a first 0 ohm resistor, and the first 0 ohm resistor is used to electrically connect the first communication pin and the charger;

[0091] Fourth patch position ( Figure 5 The fourth patch position is used to set a second 0 ohm resistor, and the second 0 ohm resistor is used to electrically connect the second communication pin and the charger;

[0092] Fifth patch position ( Figure 5 The fifth patch position is used to set a third 0 ohm resistor, and the third 0 ohm resistor is used to electrically connect the first power transmission interrupt pin and the processor;

[0093] Among them, the third patch position, the fourth patch position and the fifth patch position are idle.

[0094] In other words, a discrete solution can also be used as the second supply material. In this case, the mainstream 3A / 3.78AQFN-24 switch charging chip is mounted at the second patch position, and the PD protocol chip is mounted at the first patch position. R1, R2, and R3 are not mounted. The CC1 and CC2 of the PD protocol chip are connected to the CC1 and CC2 of the type C connector, and the INT of the PD protocol chip is connected to the INT_PD port of the mobile phone processor. In addition, the PD protocol chip and the switch charging chip can also be connected through the bus ( Figure 5 The I2C bus communicates with the processor.

[0095] In summary, any of the above methods (integrated or discrete) can be used to achieve compatibility of two sets of materials on the same mobile phone hardware board, which can not only greatly reduce costs when using the integrated chip solution provided by this application, but also adopt a discrete solution when the chip provided by this application is in short supply, thereby improving the security and reliability of the supply chain.

[0096] The present application embodiment provides a mobile device, the mobile device comprising: Figure 5 The shown boards are hardware compatible.

[0097] Among them, mobile devices refer to electronic devices that are equipped with rechargeable batteries and can support fast charging, such as mobile phones, pads, tablets, etc., and can apply the technical solutions provided in the embodiments of the present application to achieve fast charging.

[0098] Based on the chips, circuit boards and mobile devices provided in this application, the power transmission protocol chip and the switch charging chip can be integrated into the same chip, and some pins can be reused, which greatly reduces the chip cost (15%) and packaging cost (30%), and effectively saves the mobile phone layout area and the number of peripheral devices, reduces the layout area by 15%, and greatly improves the software debugging efficiency of the switch charging chip and the PD protocol chip.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A chip, characterized in that: include: Charging sub-chip and communication sub-chip; A first communication pin and a second communication pin, wherein the first communication pin and the second communication pin are electrically connected to the communication sub-chip and are used for the communication sub-chip to communicate with the charger; A first power transmission interrupt pin, the first power transmission interrupt pin is electrically connected to the communication sub-chip, and is used for the communication sub-chip to report a first power transmission interrupt signal to the processor, and the first power transmission interrupt signal is used to report the working state and the change of the working state of the communication sub-chip to the processor; A bus is electrically connected to the charging sub-chip and the communication sub-chip, and is used for the charging sub-chip and the communication sub-chip to communicate with the processor, and the processor assigns different addresses to the charging sub-chip and the communication sub-chip respectively.

2. The chip according to claim 1, characterized in that: The communication sub-chip does not support the function of supplying power to the cable with the electronic tag.

3. The chip according to claim 1 or 2, characterized in that: Also includes: A first power input pin, wherein the first power input pin is electrically connected to the charger and the charging sub-chip; a first power output pin and a second power output pin, the first power output pin and the second power output pin are electrically connected to the charging sub-chip, the first power output pin is used by the charging sub-chip to power the system, and the second power output pin is used by the charging sub-chip to charge the battery; A first charging interrupt pin, wherein the first charging interrupt pin is electrically connected to the charging sub-chip and is used for the charging sub-chip to report a first charging interrupt signal to the processor, wherein the first charging interrupt signal is used to report the working status and working status changes of the charging sub-chip to the processor.

4. A circuit board, characterized in that: include: A processor, and a chip as claimed in any one of claims 1 to 3, wherein the processor is used to control the operation of the chip.

5. The circuit board according to claim 4, characterized in that: The circuit board is provided with a first patch position and a second patch position; The first patch position is idle, and the second patch position is used to set the chip.

6. The circuit board according to claim 5, characterized in that: The circuit board also includes: a first 0 ohm resistor, wherein the first 0 ohm resistor is used to electrically connect the first communication pin and the charger; a second 0 ohm resistor, wherein the second 0 ohm resistor is used to electrically connect the second communication pin and the charger; A third 0-ohm resistor is used to electrically connect the first power transmission interrupt pin and the processor.

7. The circuit board according to claim 4, characterized in that: The circuit board is provided with a first patch position and a second patch position; Among them, the first patch position is used to set the communication chip, and the second patch position is used to set the charging chip. The charging chip has the same function as the charging sub-chip, and the communication chip has the same function as the communication sub-chip.

8. The circuit board according to claim 7, characterized in that: The charging chip comprises: a second power input pin, the second power input pin being electrically connected to the charger; A third power output pin and a fourth power output pin, wherein the third power output pin is used by the charging chip to power the system, and the fourth power output pin is used by the charging chip to charge the battery; a second charging interrupt pin, the second charging interrupt pin being electrically connected to the processor and used for the charging chip to report a second charging interrupt signal to the processor, the second charging interrupt signal being used to report the working state and the change of the working state of the charging chip to the processor; and The communication chip comprises: A third communication pin and a fourth communication pin, wherein the third communication pin and the fourth communication pin are electrically connected to the charger; a second power transmission interrupt pin, the second power transmission interrupt pin being electrically connected to the processor and used for the communication chip to report a second power transmission interrupt signal to the processor, the second power transmission interrupt signal being used to report the working state and the change of the working state of the communication chip to the processor; and The circuit board also includes: A third patch position, the third patch position is used to set a first 0 ohm resistor, the first 0 ohm resistor is used to electrically connect the first communication pin and the charger; A fourth patch position, the fourth patch position is used to set a second 0 ohm resistor, and the second 0 ohm resistor is used to electrically connect the second communication pin and the charger; a fifth patch position, the fifth patch position being used to set a third 0 ohm resistor, the third 0 ohm resistor being used to electrically connect the first power transmission interrupt pin and the processor; Among them, the third patch position, the fourth patch position and the fifth patch position are idle.

9. A mobile device, characterized in that: Comprising a circuit board as described in any one of claims 4-8.

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