CN111864854B - Pin multiplexing circuit and working method thereof, and quick charging chip and working method thereof - Google Patents
Pin multiplexing circuit and working method thereof, and quick charging chip and working method thereof Download PDFInfo
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- CN111864854B CN111864854B CN202010767836.XA CN202010767836A CN111864854B CN 111864854 B CN111864854 B CN 111864854B CN 202010767836 A CN202010767836 A CN 202010767836A CN 111864854 B CN111864854 B CN 111864854B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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Abstract
The invention provides a pin multiplexing circuit and a working method thereof, and a quick charging chip and a working method thereof, wherein the circuit comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a multiplexing terminal, a first data terminal and a second data terminal, wherein the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are all electrically connected with the main control circuit, the Type-C detection circuit, the PD communication circuit and the ID authentication circuit are all electrically connected with the multiplexing terminal, and the first data terminal and the second data terminal are respectively electrically connected with the VOOC detection circuit; Type-C detection circuitry sends Type-C to master control circuit and inserts the signal, and VOOC detection circuitry sends VOOC access signal to master control circuit, and master control circuit inserts signal control PD communication circuit or ID authentication circuit enable according to Type-C. The invention can make the communication of PD protocol and the cable ID authentication of VOOC protocol share one chip pin.
Description
Technical Field
The invention relates to the technical field of a fast charging chip, in particular to a pin multiplexing circuit for enabling a PD (potential difference) protocol and a VOOC (volatile organic compound) protocol to coexist, a working method of the pin multiplexing circuit, a fast charging chip applying the pin multiplexing circuit and a working method of the fast charging chip.
Background
The current fast charging protocol mainly comprises a USB PD protocol established by a USB alliance and a fast charging protocol customized by each large mobile phone manufacturer, and interfaces used by output ends of different fast charging protocols are different. VOOC fills agreement adapter soon and need use to have ID recognition function Type-A interface, and the quick adapter that millet company has recently promoted is then need to use the Type-A interface that has CC communication function, and the pin function of two kinds of interfaces is as shown in the following table:
as can be seen from the above table, the structures of the two interfaces are identical, but the functional definition of one of the pins is different. The VOOC fast charging protocol defines the pin as an ID pin, and the main function of the VOOC fast charging protocol is to access the information of the internal chip of the VOOC fast charging cable, so as to identify and authenticate the type and the overcurrent capacity of the cable. The millet quick charging protocol defines the pin as a CC pin and is mainly responsible for communication of the PD quick charging protocol. In addition, the different fast charging protocols require the use of cables that are not universal. The VOOC fast charging protocol must use a VOOC fast charging line with an ID authentication chip inside, and the A port PD fast charging protocol of millet needs to use a millet fast charging line with a CC communication function.
Therefore, in the current technical scheme, the ID authentication and identification and the PD communication function cannot be simultaneously realized on the same pin, so that the coexistence of the VOOC fast charging protocol and the PD fast charging protocol cannot be realized on the same Type-a interface.
Disclosure of Invention
A first object of the present invention is to provide a pin multiplexing circuit that allows communication of the PD protocol and cable ID authentication of the VOOC protocol to share one pin.
The second purpose of the invention is to provide a working method of the pin multiplexing circuit which enables the communication of PD protocol and the cable ID authentication of VOOC protocol to share one pin.
The third purpose of the invention is to provide a fast charging chip which enables the communication of PD protocol and the cable ID authentication of VOOC protocol to share one pin.
The fourth purpose of the invention is to provide a working method of the quick charging chip which enables the PD protocol and the VOOC protocol to coexist.
In order to achieve the first object, the pin multiplexing circuit provided by the invention comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a multiplexing terminal, a first data terminal and a second data terminal, wherein the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are all electrically connected with the main control circuit, the Type-C detection circuit, the PD communication circuit and the ID authentication circuit are all electrically connected with the multiplexing terminal, and the first data terminal and the second data terminal are respectively electrically connected with the VOOC detection circuit; Type-C detection circuitry sends Type-C to master control circuit and inserts the signal, and VOOC detection circuitry sends VOOC access signal to master control circuit, and master control circuit inserts signal control PD communication circuit or ID authentication circuit enable according to Type-C.
According to the scheme, the pin multiplexing circuit comprises a Type-C detection circuit, a PD communication circuit and an ID authentication circuit which are electrically connected with a multiplexing terminal, and sends a Type-C access signal to a main control circuit through the Type-C detection circuit, the VOOC detection circuit sends a VOOC access signal to the main control circuit, the main control circuit controls the PD communication circuit or the ID authentication circuit to enable according to the Type-C access signal and the VOOC access signal, so that the communication protocol is switched according to the Type of an access device, the communication of the PD protocol and the cable ID authentication of the VOOC protocol share one pin, and the PD protocol and the VOOC protocol can coexist through multiplexing of the pin.
In a further scheme, the pin multiplexing circuit further comprises a current detection circuit and a current detection terminal, the current detection circuit is electrically connected with the main control circuit, the VOOC detection circuit and the current detection terminal respectively, and the current detection circuit acquires detection current through the current detection terminal and sends the detection current to the main control circuit and the VOOC detection circuit.
Therefore, the VOOC detection circuit can acquire the detection current through the current detection circuit to judge whether the VOOC device is accessed.
In a further scheme, the pin multiplexing circuit further comprises a first pull-up resistor and a first control switch, wherein a first end of the first pull-up resistor is electrically connected with a power supply end, a second end of the first pull-up resistor is electrically connected with a first end of the first control switch, a second end of the first control switch is electrically connected with a multiplexing terminal, and a control end of the first control switch is electrically connected with the main control circuit; the main control circuit controls the Type-C detection circuit and the first control switch to work or close simultaneously.
Therefore, when the Type-C detection circuit performs CC communication detection, a pull-up resistor is required to detect, and the main control circuit controls the Type-C detection circuit and the first control switch to work or close simultaneously by setting the first pull-up resistor and the first control switch, so that the Type-C detection circuit completes detection of the access device.
In a further scheme, the pin multiplexing circuit further comprises a second pull-up resistor and a second control switch, wherein a first end of the second pull-up resistor is electrically connected with a power supply end, a second end of the second pull-up resistor is electrically connected with a first end of the second control switch, a second end of the second control switch is electrically connected with the multiplexing terminal, and a control end of the second control switch is electrically connected with the main control circuit; the main control circuit controls the ID authentication circuit and the second control switch to work or close simultaneously.
Therefore, the second pull-up resistor and the second control switch are arranged, and the main control circuit controls the ID authentication circuit and the second control switch to work or close simultaneously, so that the ID authentication circuit completes the transmission of the ID information.
In order to achieve the second object, the operating method of the pin multiplexing circuit provided by the invention comprises the following steps: enabling a Type-C detection circuit and a VOOC detection circuit; acquiring a Type-C access signal sent by a Type-C detection circuit and a VOOC access signal sent by a VOOC detection circuit; when the interface device with the CC communication function is confirmed to be accessed according to the Type-C access signal, enabling the PD communication circuit and closing the VOOC detection circuit; when VOOC access signal confirms that VOOC interface device has accessed, the ID authentication circuit is enabled and the Type-C detection circuit is closed.
According to the scheme, the working method of the pin multiplexing circuit comprises the steps of obtaining a Type-C access signal sent by a Type-C detection circuit and a VOOC access signal sent by a VOOC detection circuit, judging whether a corresponding interface device is accessed according to the Type-C access signal and the VOOC access signal, switching communication protocols according to the Type of an access device, enabling communication of a PD protocol and cable ID authentication of the VOOC protocol to share one pin, and enabling the PD protocol and the VOOC protocol to coexist through multiplexing of the pin.
In order to achieve the third object, the fast charging chip provided by the invention is provided with a pin multiplexing circuit, the pin multiplexing circuit comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a multiplexing terminal, a first data terminal and a second data terminal, the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are all electrically connected with the main control circuit, the Type-C detection circuit, the PD communication circuit and the ID authentication circuit are all electrically connected with the multiplexing terminal, and the first data terminal and the second data terminal are respectively electrically connected with the VOOC detection circuit; Type-C detection circuitry sends Type-C to master control circuit and inserts the signal, and VOOC detection circuitry sends VOOC access signal to master control circuit, and master control circuit inserts signal control PD communication circuit or ID authentication circuit enable according to Type-C.
According to the scheme, in the quick charging chip, the pin multiplexing circuit is electrically connected with the multiplexing terminal through the Type-C detection circuit, the PD communication circuit and the ID authentication circuit, the Type-C detection circuit sends a Type-C access signal to the main control circuit, the VOOC detection circuit sends a VOOC access signal to the main control circuit, the main control circuit controls the PD communication circuit or the ID authentication circuit to enable according to the Type of the access device, so that the communication protocol is switched according to the Type of the access device, the communication of the PD protocol and the cable ID authentication of the VOOC protocol share one pin, and the PD protocol and the VOOC protocol can coexist through multiplexing of the pin.
In order to achieve the fourth object, the working method of the quick charge chip provided by the invention comprises the following steps: enabling a Type-C detection circuit and a VOOC detection circuit; acquiring a Type-C access signal sent by a Type-C detection circuit and a VOOC access signal sent by a VOOC detection circuit; when the interface device with the CC communication function is confirmed to be accessed according to the Type-C access signal, enabling the PD communication circuit and closing the VOOC detection circuit; when VOOC access signal confirms that VOOC interface device has accessed, the ID authentication circuit is enabled and the Type-C detection circuit is closed.
According to the scheme, the working method of the quick charging chip comprises the steps of obtaining a Type-C access signal sent by a Type-C detection circuit and a VOOC access signal sent by a VOOC detection circuit, judging whether a corresponding interface device is accessed according to the Type-C access signal and the VOOC access signal, switching communication protocols according to the Type of the access device, enabling communication of a PD protocol and cable ID authentication of the VOOC protocol to share one pin, and enabling the PD protocol and the VOOC protocol to coexist through multiplexing of the pin.
Drawings
Fig. 1 is a schematic block diagram of a circuit of a fast charging chip connected to a Type-a interface in an embodiment of the fast charging chip of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
As shown in fig. 1, the fast charging chip 10 of the present embodiment is provided with a pin multiplexing circuit, the pin multiplexing circuit includes a main control circuit 1, a Type-C detection circuit 2, a PD communication circuit 3, an ID authentication circuit 4, a VOOC detection circuit 5, a multiplexing terminal CC/ID, a first data terminal DP and a second data terminal DM, the Type-C detection circuit 2, the PD communication circuit 3, the ID authentication circuit 4 and the VOOC detection circuit 5 are all electrically connected to the main control circuit 1, the Type-C detection circuit 2, the PD communication circuit 3, the ID authentication circuit 4 are all electrically connected to the multiplexing terminal CC/ID, and the first data terminal DP and the second data terminal DM are respectively electrically connected to the VOOC detection circuit 5. Type-C detection circuitry 2 sends Type-C to master control circuit 1 and inserts the signal, and VOOC detection circuitry 5 sends VOOC access signal to master control circuit 1, and master control circuit 1 inserts signal control PD communication circuit 3 or ID authentication circuit 4 enable according to Type-C.
The pin multiplexing circuit further comprises a current detection circuit 6 and a current detection terminal, wherein the current detection circuit 6 is respectively electrically connected with the main control circuit 1, the VOOC detection circuit 5 and the current detection terminal, and the current detection circuit 6 acquires detection current through the current detection terminal and sends the detection current to the main control circuit 1 and the VOOC detection circuit 5. In this embodiment, the current detection terminal includes a first current detection terminal CSP and a second current detection terminal CSN, the first current detection terminal CSP and the second current detection terminal CSN are both electrically connected to the current detection circuit 6, and the first current detection terminal CSP and the second current detection terminal CSN are used for acquiring a current signal of the access device.
The pin multiplexing circuit further comprises a first pull-up resistor RPA first control switch K1, a second pull-up resistor RIDAnd a second control switch K2. First pull-up resistor RPIs electrically connected to a power supply terminal VCC, a first pull-up resistor RPIs electrically connected to the first terminal of the first control switch K1And then, a second end of the first control switch K1 is electrically connected with the multiplexing terminal CC/ID, a control end of the first control switch K1 is electrically connected with the main control circuit 1, and the main control circuit 1 controls the Type-C detection circuit 2 and the first control switch K1 to work or close simultaneously. Second pull-up resistor RIDIs electrically connected with a power supply terminal VCC, and a second pull-up resistor RIDThe second terminal of the second control switch K2 is electrically connected with the first terminal of the second control switch K2, the second terminal of the second control switch K2 is electrically connected with the multiplexing terminal CC/ID, the control terminal of the second control switch K2 is electrically connected with the main control circuit 1, and the main control circuit 1 controls the ID authentication circuit and the second control switch K2 to work or close simultaneously. The first control switch K1 and the second control switch K2 both adopt MOS switch tubes and first pull-up resistors RPAnd a second pull-up resistor RIDCurrent sources may also be used instead.
It should be noted that in this embodiment, the main control circuit 1, the Type-C detection circuit 2, the PD communication circuit 3, the ID authentication circuit 4, the VOOC detection circuit 5, and the current detection circuit 6 all adopt known circuits, and details thereof are not described herein.
The pin multiplexing circuit of the fast charging chip 10 of the embodiment firstly enables the Type-C detection circuit 2 and the VOOC detection circuit 5 when operating. Main control circuit 1 sends enabling signal to Type-C detection circuitry 2 to sending enabling signal to VOOC detection circuitry 5, make Type-C detection circuitry 2 and VOOC detection circuitry 5 get into operating condition, carry out the detection of access signal.
Next, the Type-C access signal transmitted by the Type-C detection circuit 2 and the VOOC access signal transmitted by the VOOC detection circuit 5 are acquired. After Type-C detection circuitry 2 and VOOC detection circuitry 5 got into operating condition, the access signal that external device provided is acquireed to the corresponding terminal of accessible, and in this embodiment, Type-C detection circuitry 2 acquires Type-C access signal through multiplexing terminal CC ID, and VOOC detection circuitry 5 acquires VOOC access signal through first data terminal DP and second data terminal DM, or VOOC detection circuitry 5 acquires VOOC access signal through current detection circuitry 6. The Type-C detection circuit 2 for acquiring the Type-C access signal and the VOOC detection circuit 5 for acquiring the VOOC access signal are well known in the art, and will not be described herein.
Next, after acquiring the Type-C access signal sent by the Type-C detection circuit 2 and the VOOC access signal sent by the VOOC detection circuit 5, when it is confirmed according to the Type-C access signal that the interface device with the CC communication function is accessed, the PD communication circuit 3 is enabled and the VOOC detection circuit 5 is turned off. When the main control circuit 1 confirms that the interface device with the CC communication function is accessed through the Type-C access signal, it is determined that the PD communication protocol needs to be started to communicate with the interface device with the CC communication function, so the main control circuit 1 sends an enable signal to the PD communication circuit 3, and the PD communication circuit 3 enters a working state to communicate with the accessed Type-C interface device. The interface device with the CC communication function may be a cable or a terminal device with the CC communication function. The VOOC detection circuit 5 is turned off when the PD communication circuit 3 is enabled in order to save power consumption.
In addition, after acquiring the Type-C access signal sent by the Type-C detection circuit 2 and the VOOC access signal sent by the VOOC detection circuit 5, when it is confirmed from the VOOC access signal that the VOOC interface device is accessed, the ID authentication circuit 4 is enabled and the Type-C detection circuit 2 is turned off. When the master control circuit 1 confirms that the VOOC interface device is accessed through the VOOC access signal, it is considered that the VOOC communication protocol needs to be started to communicate with the VOOC interface device, therefore, the master control circuit 1 sends an enabling signal to the ID authentication circuit 4 to enable the ID authentication circuit 4 to enter a working state so as to perform ID authentication communication with the accessed VOOC interface device, and then the VOOC fast charging communication is initiated after the ID authentication is passed. The VOOC interface device may be a cable or a terminal equipment provided with a VOOC interface, or the like. The Type-C detection circuit 2 is turned off when the ID authentication circuit 4 is enabled, so as to save power consumption.
Therefore, in the quick charging chip, the pin multiplexing circuit electrically connects the Type-C detection circuit 2, the PD communication circuit 3 and the ID authentication circuit 4 with the multiplexing terminal CC/ID, and sends a Type-C access signal to the main control circuit 1 through the Type-C detection circuit 2, the VOOC detection circuit 5 sends a VOOC access signal to the main control circuit 1, and the main control circuit 1 judges whether a corresponding interface device is accessed according to the Type-C access signal and the VOOC access signal, so that the communication protocol is switched according to the Type of the access device, the communication of the PD protocol and the cable ID authentication of the VOOC protocol share one pin, and the PD protocol and the VOOC protocol can coexist through the multiplexing of the pin.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (4)
1. A pin multiplexing circuit, comprising: the detection circuit comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a current detection circuit, a first pull-up resistor, a second pull-up resistor, a first control switch, a second control switch, a current detection terminal, a multiplexing terminal, a first data terminal and a second data terminal, wherein the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are all electrically connected with the main control circuit, the Type-C detection circuit, the PD communication circuit and the ID authentication circuit are all electrically connected with the multiplexing terminal, and the first data terminal and the second data terminal are respectively electrically connected with the VOOC detection circuit;
the Type-C detection circuit sends a Type-C access signal to the main control circuit, the VOOC detection circuit sends a VOOC access signal to the main control circuit, and the main control circuit controls the PD communication circuit or the ID authentication circuit to enable according to the Type-C access signal and the VOOC access signal;
the current detection circuit is respectively electrically connected with the main control circuit, the VOOC detection circuit and the current detection terminal, and acquires detection current through the current detection terminal and sends the detection current to the main control circuit and the VOOC detection circuit;
a first end of the first pull-up resistor is electrically connected with a power supply end, a second end of the first pull-up resistor is electrically connected with a first end of the first control switch, a second end of the first control switch is electrically connected with the multiplexing terminal, a control end of the first control switch is electrically connected with the main control circuit, and the main control circuit controls the Type-C detection circuit and the first control switch to work or close simultaneously;
the first end of the second pull-up resistor is electrically connected with a power supply end, the second end of the second pull-up resistor is electrically connected with the first end of the second control switch, the second end of the second control switch is electrically connected with the multiplexing terminal, the control end of the second control switch is electrically connected with the main control circuit, and the main control circuit controls the ID authentication circuit and the second control switch to work or close simultaneously.
2. A method for operating a pin multiplexing circuit, applied to the pin multiplexing circuit of claim 1, wherein: the method comprises the following steps:
enabling the Type-C detection circuit and the VOOC detection circuit;
acquiring the Type-C access signal sent by the Type-C detection circuit and the VOOC access signal sent by the VOOC detection circuit;
enabling the PD communication circuit and closing the VOOC detection circuit when the interface device with the CC communication function is confirmed to be accessed according to the Type-C access signal;
when VOOC access signal confirms that VOOC interface device has accessed, enable the ID authentication circuit and close the Type-C detection circuit.
3. A fill chip soon which characterized in that: the pin multiplexing circuit is arranged and comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a current detection circuit, a first pull-up resistor, a second pull-up resistor, a first control switch, a second control switch, a current detection terminal, a multiplexing terminal, a first data terminal and a second data terminal, wherein the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are all electrically connected with the main control circuit, the Type-C detection circuit, the PD communication circuit and the ID authentication circuit are all electrically connected with the multiplexing terminal, and the first data terminal and the second data terminal are respectively electrically connected with the VOOC detection circuit;
the Type-C detection circuit sends a Type-C access signal to the main control circuit, the VOOC detection circuit sends a VOOC access signal to the main control circuit, and the main control circuit controls the PD communication circuit or the ID authentication circuit to enable according to the Type-C access signal and the VOOC access signal;
the current detection circuit is respectively electrically connected with the main control circuit, the VOOC detection circuit and the current detection terminal, and acquires detection current through the current detection terminal and sends the detection current to the main control circuit and the VOOC detection circuit;
a first end of the first pull-up resistor is electrically connected with a power supply end, a second end of the first pull-up resistor is electrically connected with a first end of the first control switch, a second end of the first control switch is electrically connected with the multiplexing terminal, a control end of the first control switch is electrically connected with the main control circuit, and the main control circuit controls the Type-C detection circuit and the first control switch to work or close simultaneously;
the first end of the second pull-up resistor is electrically connected with a power supply end, the second end of the second pull-up resistor is electrically connected with the first end of the second control switch, the second end of the second control switch is electrically connected with the multiplexing terminal, the control end of the second control switch is electrically connected with the main control circuit, and the main control circuit controls the ID authentication circuit and the second control switch to work or close simultaneously.
4. A working method of a quick charge chip is applied to the quick charge chip of claim 3, and is characterized in that: the method comprises the following steps:
enabling the Type-C detection circuit and the VOOC detection circuit;
acquiring the Type-C access signal sent by the Type-C detection circuit and the VOOC access signal sent by the VOOC detection circuit;
enabling the PD communication circuit and closing the VOOC detection circuit when the interface device with the CC communication function is confirmed to be accessed according to the Type-C access signal;
when VOOC access signal confirms that VOOC interface device has accessed, enable the ID authentication circuit and close the Type-C detection circuit.
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