CN107977334B - Electronic card and its detection method - Google Patents

Abstract

The present disclosure relates to an electronic card and a detection method thereof, wherein the detection method is used for detecting whether output signals output by a host exist in a plurality of terminals numbered 41, 43, 47, 49, a plurality of terminals numbered 29, 31, 35, 37, a plurality of terminals numbered 17, 19, 23, 25 or a plurality of terminals numbered 5, 7, 11, 13 of a plurality of terminals of a connector of the electronic card, and determining whether a communication protocol of the host is a SATA communication protocol, a PCIe communication protocol or a USB3.0 communication protocol by using a detection result and the output signals. The electronic card and the detection method thereof can improve the use convenience of the electronic card.

Description

Electronic card and its detection method

technical field

The present disclosure relates to an electronic card and its detection method, in particular to an electronic card capable of detecting the communication protocol of the host, and automatically executing the corresponding firmware unit according to the communication protocol of the host to execute the corresponding communication protocol and the electronic card and its detection method.

Background technique

Currently, the standard specifications for connectors used in electronic cards are mainly divided into Mini PCI-Express standard specifications, mSATA standard specifications, and M.2 standard specifications. Among them, the connector as the Mini PCI-Express standard specification is used to support the PCIe communication protocol, the connector as the mSATA standard specification is used to support the SATA communication protocol, and as the M.2 standard specification (formerly known as Next Generation Form Factor (NGFF) )) connectors can support SATA, PCIe and USB3.0 communication protocols. Since connectors conforming to the M.2 standard specification have the multiple characteristics of small size, power saving and fast transmission speed, and can support the above three communication protocols at the same time, electronic cards using the M.2 standard specification connector will become the mainstream. .

Although the connector under the M.2 standard specification can support SATA, PCIe and USB 3.0 communication protocols at the same time, the current electronic card and the host for electronic card assembly, such as the motherboard, only carry a single communication protocol. For example, the host only carries SATA communication protocol, PCIe communication protocol or USB 3.0 communication protocol, and the electronic card only carries the SATA communication protocol, PCIe communication protocol or USB 3.0 communication protocol, and it is not easy for the user to know the communication protocol carried by the host, so when the host When exchanging packets with the electronic card through OOB (Out-of-Band) signal handshake (handshake), if the communication protocols carried by the host and the electronic card are different, the packets will not be exchanged correctly, resulting in host and electronic card The communication between them cannot be carried out normally, so the user must constantly try to replace the electronic card carrying different communication protocols, in order to replace the correct electronic card that conforms to the communication protocol of the host. In this way, using the M.2 standard specification The convenience of the electronic card of the connector is not good. What's more, due to the OOB signal handshake, the current electronic card using the connector under the M.2 standard specification can only communicate with the host correctly when the communication protocol carried by it is the same as that carried by the host. The internal communication protocol is only activated when the packet is packaged. When the electronic card is connected to the host, it cannot automatically detect the communication protocol carried by the host, and then select the corresponding communication protocol. Therefore, it also increases the current M.2 standard specification. The inconvenience of the electronic card of the connector.

Therefore, how to develop a kind of electronic card and its detection method that overcomes above-mentioned shortcoming is the present urgent demand in fact.

Contents of the invention

The purpose of this disclosure is to provide an electronic card and its detection method to solve the problem that the existing electronic card only carries a single communication protocol, and the existing electronic card cannot automatically detect the communication carried by the host when it is combined with the host What is the protocol, and then the corresponding communication protocol is selected, which leads to problems such as poor convenience.

In order to achieve the aforementioned purpose, a preferred embodiment of the present disclosure is to provide a detection method suitable for electronic cards, the electronic card includes a connector, the connector complies with the M.2 standard specification, and the connector includes a plurality of terminals, the electronic card The output signal from the host is received through at least one corresponding terminal among the plurality of terminals, and the detection method includes the steps: Step a detects a plurality of terminals numbered 17, 19, 23 and 25 or numbered 5, 7, 11 and whether there are output signals at multiple terminals of 13, if the detection result of step b is that multiple terminals with numbers 17, 19, 23 and 25 or multiple terminals with numbers 5, 7, 11 and 13 have output signals, Determine that the communication protocol of the host computer is the PCIe communication protocol, and terminate the detection method. When there is no output signal, execute step c. Step c detects whether there are output signals at multiple terminals numbered 41, 43, 47 and 49 among the multiple terminals. If the detection result of step d is that the numbers are 41, 43, When multiple terminals 47 and 49 have output signals, use the output signals to determine that the communication protocol of the host computer is the PCIe communication protocol or the SATA communication protocol, and terminate the detection method. When multiple terminals of 49 do not have output signals, execute step e, step e detects whether multiple terminals numbered 29th, 31st, 35th and 37th among the multiple terminals have output signals, and if the detection result of step f is the number There are output signals for the 29th, 31st, 35th and 37th terminals, use the output signal to determine that the communication protocol of the host is the PCIe communication protocol or the USB 3.0 communication protocol, and terminate the detection method, if the detection result is the number 29 , 31, 35 and 37, when there is no output signal from multiple terminals, the detection method is terminated.

In order to achieve the aforementioned purpose, another preferred embodiment of the present disclosure is to provide a detection method suitable for electronic cards, the electronic card includes a connector, the connector conforms to the M.2 standard specification, and the connector includes multiple terminals, the electronic card The output signal from the host is received through at least one terminal corresponding to the plurality of terminals. The detection method includes steps: Step a sets an action set including a first action, a second action and a third action, wherein the first action is to detect Among the multiple terminals, whether there are multiple terminals numbered 5, 7, 11, and 13 or 17, 19, 23, and 25 have output signals, and when the detection result is yes, it is determined that the communication protocol of the host is the PCIe communication protocol. The second action is to detect whether there are output signals at the multiple terminals numbered 41, 43, 47 and 49, and continue to determine whether the communication protocol of the host is the PCIe communication protocol or the SATA communication protocol according to the output signal when the detection result is yes, The third action is to detect whether there are output signals from multiple terminals numbered 29, 31, 35, and 37, and continue to determine whether the communication protocol of the host is PCIe communication protocol or USB3.0 communication according to the output signal when the detection result is yes Protocol, step b executes any one of the first action, the second action and the third action, and terminates the detection method when the communication protocol of the host is judged, otherwise enters the next step, step c executes the action set except step b Any action other than the action performed in the action set, and terminate the detection method when the communication protocol of the host is judged, otherwise enter the next step, and step d executes actions in the action set except for the actions performed in step b and step c The remaining actions are performed and the detection method is terminated.

To achieve the aforementioned purpose, another preferred embodiment of the present disclosure is to provide an electronic card that communicates with the host computer. The electronic card includes: a first firmware unit for executing the SATA communication protocol; a second firmware unit for executing the PCIe Communication protocol; the third firmware unit is used to implement the USB 3.0 communication protocol; the connector conforms to the M.2 standard specification and is a medium for communicating with the host. The connector also includes multiple terminals, and the electronic card passes through multiple terminals. At least one corresponding terminal receives the output signal from the host; the switch unit is electrically connected to multiple terminals; wherein, the switch unit executes a detection method, and the detection method includes the steps: step a detects multiple terminals numbered 17th and 19th , 23 and 25 terminals or multiple terminals numbered 5, 7, 11 and 13 whether there are output signals, if the detection result of step b is multiple terminals or numbers numbered 17, 19, 23 and 25 When there are output signals from multiple terminals of No. 5, 7, 11 and 13, it is determined that the communication protocol of the host computer is the PCIe communication protocol, and the detection method is terminated. When there is no output signal for the terminal and the multiple terminals numbered 5th, 7th, 11th and 13th, execute step c, and step c detects whether multiple terminals numbered 41st, 43rd, 47th and 49th among the multiple terminals exist Output signal, if the result of the detection in step d is that there are output signals at multiple terminals numbered 41, 43, 47 and 49, use the output signal to determine that the communication protocol of the host is the PCIe communication protocol or the SATA communication protocol, and terminate Detection method, if the result of the detection is that there are no output signals at the terminals numbered 41st, 43rd, 47th and 49th, execute step e, and step e detects the terminals numbered 29th, 31st, 35th and 37th among the multiple terminals Whether multiple terminals have output signals, and if the detection result of step f is that multiple terminals numbered 29, 31, 35, and 37 have output signals, use the output signals to determine that the communication protocol of the host is PCIe communication protocol or USB 3.0 communication protocol, and terminate the detection method, if the result of the detection is that there are no output signals from the terminals numbered 29, 31, 35 and 37, the detection method is terminated, and the first firmware unit is executed correspondingly according to the result of the detection method , the second firmware unit or the third firmware unit.

Description of drawings

FIG. 1 is a schematic structural diagram of an electronic card in a preferred embodiment of the present disclosure when it is separated from a host.

FIG. 2 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the SATA communication protocol.

FIG. 3 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the PCIe communication protocol.

FIG. 4 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the USB 3.0 communication protocol.

FIG. 5 is a flow chart of the steps of the detection method of the first preferred embodiment of the present disclosure applied to the electronic card shown in FIG. 1 .

FIG. 6 is a flow chart of the steps of the detection method of the second preferred embodiment of the present disclosure applied to the electronic card shown in FIG. 1 .

Explanation of reference signs:

1: electronic card

2: Host

11: Connector

12: First firmware unit

13: Second firmware unit

14: The third firmware unit

15: Switch control unit

M1-M4: Process steps of detection method

S1-S6: Process steps of detection method

Detailed ways

Some typical embodiments embodying the features and advantages of the present disclosure will be described in detail in the description in the following paragraphs. It should be understood that the disclosure is capable of various changes in different embodiments without departing from the scope of the disclosure, and that the description and drawings therein are illustrative in nature and not intended to Limit this disclosure.

FIG. 1 is a schematic structural diagram of an electronic card in a preferred embodiment of the present disclosure when it is separated from a host. As shown in FIG. 1 , the electronic card 1 of the present disclosure may be, but not limited to, a solid state drive (SSD) or a non-volatile memory module, which is detachably connected to a host 2, such as a slot on a motherboard. , and when the electronic card 1 is combined with the host 2, the host 2 can output an output signal to the electronic card 1 to communicate with the electronic card 1 for data transmission. The electronic card 1 includes a connector 11, a first firmware unit 12 . The second firmware unit 13 , the third firmware unit 14 and the switch unit 15 . The connector 11 conforms to the M.2 standard specification, and the connector 11 can be plugged into the host 2, wherein the connector 11 is a medium for communicating with the host 2 and includes multiple terminals. When the electronic card 1 and the host 2 are combined When connected, multiple terminals of the connector 11 are electrically connected to corresponding terminals (not shown) of the host 2 , and the electronic card 1 receives an output signal from the host 2 through at least one of the multiple terminals.

The first firmware unit 12 is used to implement the SATA communication protocol, so that the electronic card 1 and the host 2 can perform data transmission through the connector 11 in the form of the SATA communication protocol. The second firmware unit 13 and the third firmware unit are used to implement the PCIe communication protocol and the USB3.0 communication protocol respectively, and they can respectively enable the electronic card 1 and the host computer 2 to use the SATA communication protocol or the USB3.0 communication protocol through the connector 11. way of data transmission.

The switch unit 15 is electrically connected to a plurality of terminals of the connector 11 , wherein the switch unit 15 may be a microcontroller. The switch unit 15 can execute the first firmware unit 12, the second firmware unit 13 or the third firmware unit 14 correspondingly according to the communication protocol of the host 2 being the SATA communication protocol, the PCIe communication protocol or the USB 3.0 communication protocol, and then execute the SATA communication protocol , PCIe communication protocol or USB 3.0 communication protocol, so that the host 2 and the electronic card 1 perform data transmission under the same communication protocol.

It can be seen from the above that the electronic card 1 of the present disclosure can execute the first firmware unit 12, the second firmware unit 13 or the third firmware unit 14 according to the communication protocol of the host 2, and then execute the SATA communication protocol, PCIe communication protocol and USB3 respectively. .0 communication protocol. In this way, the electronic card 1 can perform data transmission under the same communication protocol as the host 2. Therefore, compared with the inconvenience caused by the electronic card in the prior art only supporting a single communication protocol, the electronic card 1 of the present disclosure is The corresponding firmware unit can be automatically executed according to the communication protocol of the host 2 to execute the corresponding communication protocol, so the convenience can be greatly improved.

It should be further explained that the connector 11 of the electronic card 1 can have different specifications according to different required communication protocols (mainly distinguished by key position, such as B type, M type, B+M type, etc.), and in Under different specifications, the definitions of multiple terminals of the connector 11 will be different. For example, FIG. 2 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the SATA communication protocol. As shown in Figure 2, when the electronic card 1 needs to communicate with the host 2 using the SATA communication protocol, it is defined that terminals numbered 41, 43, 47 and 49 among the multiple terminals are used to receive the output from the host 2 The output signal enables the electronic card 1 to communicate with the host 2 through terminals numbered 41 , 43 , 47 and 49 to establish a connection.

FIG. 3 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the PCIe communication protocol. As shown in Figure 3, when the electronic card 1 communicates with the host computer 2 using the PCIe communication protocol, a plurality of terminals whose numbers are defined as 41st, 43rd, 47th and 49th are used to receive the output signal output by the host computer 2, and the definition number Multiple terminals of the 29th, 31st, 35th and 37th are used to receive the output signals output by the host computer 2, and the multiple terminals defined as the 17th, 19th, 23rd and 25th terminals are used to receive the output signals or definition numbers outputted by the host computer 2 A plurality of terminals of the 5th, 7th, 11th and 13th receive the output signal output by the host computer 2, so that the electronic card 1 passes through the numbered 41st, 43rd, 47th and 49th, numbered 29th, 31st, 35th and 37th, Multiple terminals numbered 17th, 19th, 23rd and 25th or numbered 5th, 7th, 11th and 13th are used to communicate with the host 2 to establish a connection.

FIG. 4 is a pin definition diagram of the connector conforming to the M.2 standard specification shown in FIG. 1 under the USB 3.0 communication protocol. As shown in Figure 4, when the electronic card 1 communicates with the host 2 using the USB 3.0 communication protocol, multiple terminals numbered 29, 31, 35 and 37 are defined to receive the output signal output by the host 2, so that The electronic card 1 communicates with the host 2 through terminals numbered 29, 31, 35 and 37 to establish a connection.

In this embodiment, the terminals numbered 41st, 43rd, 47th, and 49th are differential signal pairs defined in the SATA communication protocol, and the terminals numbered 41st, 43rd, 47th, and 49th Terminals, multiple terminals numbered 29, 31, 35, and 37, multiple terminals numbered 17, 19, 23, and 25, or multiple terminals numbered 5, 7, 11, and 13 are PCIe communication protocols The differential signal group defined in , the multiple terminals numbered 29th, 31st, 35th and 37th are the differential signal group defined in the USB3.0 communication protocol, and the above differential signal group is used to receive the output signal output by the host 2 (ie differential signal).

In addition, it can be seen from the above that the switch unit 15 of the electronic card 1 of the present disclosure can execute the first firmware unit 12 and the second firmware unit 13 correspondingly according to the communication protocol of the host 2, which is the SATA communication protocol, the PCIe communication protocol or the USB 3.0 communication protocol. Or the third firmware unit 14, and then execute the SATA communication protocol, PCIe communication protocol or USB 3.0 communication protocol, so in order to distinguish the communication protocol of the host 2 as the SATA communication protocol, PCIe communication protocol or USB 3.0 communication protocol, the electronic card of the present disclosure The switch unit 15 of 1 actually also implements a detection method, which will be described below.

Please refer to FIG. 5 , together with FIG. 1 , wherein FIG. 5 is a flow chart of the steps of the detection method of the first preferred embodiment of the present disclosure applied to the electronic card shown in FIG. 1 . As shown in FIG. 5 , first, step M1 is executed to set an action set including the first action, the second action and the third action, wherein the first action is to detect the terminals numbered 5 and 7 among the multiple terminals of the connector 11 , a plurality of terminals 11 and 13 or a plurality of terminals numbered 17, 19, 23 and 25 have output signals, and when the detection result is yes, it is determined that the communication protocol of the host computer 2 is the PCIe communication protocol, and the second action is Detect whether there are output signals at multiple terminals numbered 41, 43, 47, and 49, and continue to use the output signals to determine whether the communication protocol of the host computer 2 is the PCIe communication protocol or the SATA communication protocol when the detection result is yes, and the third action To detect whether there are output signals at multiple terminals numbered 29, 31, 35, and 37, and continue to detect the output signals when the detection result is yes, so as to determine whether the communication protocol of the host 2 is the PCIe communication protocol or USB according to the output signals 3.0 communication protocol.

Next, execute step M2, execute any one of the first action, the second action and the third action, and terminate the detection method when the communication protocol of the host 2 is determined, otherwise enter the next step.

Next, execute step M3, execute any action in the action set except the action executed in step M2, and terminate the detection method when the communication protocol of the host 2 is determined, otherwise enter the next step.

Finally, step M4 is executed to execute the remaining actions in the action set except the actions executed in step M2 and step M3.

After the switch unit 15 ends the above detection method, the switch unit 15 can determine that the communication protocol of the host 2 is the SATA communication protocol, the PCIe communication protocol or the USB 3.0 communication protocol, and then when it is determined that the communication protocol of the host 2 is the SATA communication protocol, Execute the first firmware unit 12 and execute the SATA communication protocol, and when it is determined that the communication protocol of the host computer 2 is the PCIe communication protocol, then execute the second firmware unit 13 and execute the PCIe communication protocol, and determine that the communication protocol of the host computer 2 is USB3. When the communication protocol is 0, the third firmware unit 14 is executed to execute the USB 3.0 communication protocol.

In some embodiments, in the second action of the action set, when it is detected that there are output signals for terminals 41, 43, 47, and 49, the output signals will continue to be used and a default judgment condition will be used to determine The communication protocol of the host 2 is the PCIe communication protocol or the SATA communication protocol. The preset judgment condition can be, but not limited to, set to be judged by the differential pressure range of the output signal. For example, if the differential pressure range of the output signal is A～ B, then it is determined that the communication protocol of the host 2 is the PCIe communication protocol, and if it is detected that the pressure difference range of the output signal is C～D, then it is determined that the communication protocol of the host 2 is the SATA communication protocol. What's more, when the communication protocol of the host 2 is determined to be the PCIe communication protocol or the SATA communication protocol according to the default judgment condition by using the output signal, the detection method is terminated.

In some embodiments, the switch unit 15 of the electronic card 1 can directly judge the communication protocol of the output signal of the host 2 as the SATA communication protocol or PCIe according to the definition of the signal by the physical layer (Physical layer), such as the voltage or wavelength of the signal. Communication protocol, so in the second action, when it is detected that there are output signals for the 41st, 43rd, 47th and 49th terminals, the switch unit 15 continues to define the signal according to the physical layer, and then knows the communication of the output signal The protocol is the SATA communication protocol or the PCIe communication protocol. In this way, it can be determined that the communication protocol of the host 2 is the PCIe communication protocol or the SATA communication protocol. What's more, when the switch unit 15 continues to define the signal according to the physical layer, and then learns that the communication protocol of the host 2 is the PCIe communication protocol or the SATA communication protocol, the detection method is terminated. In addition, in the SATA communication protocol, the USB 3.0 communication protocol, and the PCIe communication protocol, the way the physical layer defines signals has been clearly defined, and will not be repeated here.

In some embodiments, in the third action of the action set, when it is detected that there are output signals for the 29th, 31st, 35th and 37th terminals, the output signal will continue to be used and another preset judgment condition will be followed To determine whether the communication protocol of the host computer 2 is the PCIe communication protocol or the USB 3.0 communication protocol, the other preset judgment condition can be, but not limited to, set to be judged by the pressure difference range of the output signal, for example, if the voltage of the output signal If the difference range is A-B, it is determined that the communication protocol of the host 2 is the PCIe communication protocol, and if the detected output signal pressure difference range is E-F, it is determined that the communication protocol of the host 2 is the USB 3.0 communication protocol. What's more, when the communication protocol of the host 2 is determined to be the PCIe communication protocol or the USB 3.0 communication protocol according to the default judgment condition by using the output signal, the detection method is terminated.

In some embodiments, the switch unit 15 of the electronic card 1 can directly determine whether the communication protocol of the output signal of the host 2 is the PCIe communication protocol or USB according to the definition of the signal by the physical layer (Physical layer), such as the voltage or wavelength of the signal. 3.0 communication protocol, so in the third action, when it is detected that there are output signals for the 29th, 31st, 35th and 37th terminals, the switch unit 15 continues to define the signal according to the physical layer, and then knows the output signal The communication protocol is the PCIe communication protocol or the USB 3.0 communication protocol. In this way, it can be determined that the communication protocol of the host 2 is the PCIe communication protocol or the USB 3.0 communication protocol. What's more, when the switch unit 15 continues to define the signal according to the physical layer, and then learns that the communication protocol of the host 2 is the PCIe communication protocol or the USB 3.0 communication protocol, the detection method is terminated. In addition, in the SATA communication protocol, the USB3.0 communication protocol, and the PCIe communication protocol, the way of defining signals at the physical layer has been clearly defined, and will not be repeated here.

Of course, another preferred embodiment of the present disclosure can execute the first action in step M2 shown in FIG. 5 , then execute the second action in step M3 , and finally execute the third action in step M4 . In other words, compared to FIG. 5 , the execution order of the first action, the second action, and the third action is not sorted. The detection method in another preferred embodiment of the present disclosure actually targets the first action, the second action and the execution order of the third action are preset, and according to the above order, the flow chart of the detection method in another preferred embodiment of the present disclosure will be shown in FIG. 6 , which will be described below.

Please refer to FIG. 6 , together with FIG. 1 , wherein FIG. 6 is a flow chart of the steps of the detection method of the second preferred embodiment of the present disclosure applied to the electronic card shown in FIG. 1 . As shown in Figure 6, at first, step S1 is executed, and the switch unit 15 detects a plurality of terminals numbered 17th, 19th, 23rd, and 25th or numbered 5th, 7th, 11th, and 13th among the multiple terminals of the connector 11. Whether there are output signals at multiple terminals.

Next, step S2 is executed. If the detection result of the switch unit 15 is that there are output signals at the terminals numbered 17, 19, 23, and 25 or at the terminals numbered 5, 7, 11, and 13, the switch unit 15 determines that the host The communication protocol of 2 is the PCIe communication protocol, and the detection method is terminated. If the detection result of the switch unit 15 is a plurality of terminals numbered 17, 19, 23 and 25 and a plurality of terminals numbered 5, 7, 11 and 13 If there is no output signal at any of the terminals, step S3 is executed.

In step S3 , the switch unit 15 detects whether there are output signals at terminals numbered 41st, 43rd, 47th and 49th among the terminals.

Next, step S4 is executed, if the detection result of the switch unit 15 is that there are output signals at the terminals numbered 41st, 43rd, 47th and 49th, then the switch unit 15 uses the output signals to correspondingly determine that the communication protocol of the host computer 2 is PCIe communication protocol or SATA communication protocol, if the result of the detection is that there are no output signals from terminals numbered 41st, 43rd, 47th and 49th, then step S5 will be executed.

Next, step S5 is executed, and the switch unit 15 detects whether there are output signals at the terminals numbered 29th, 31st, 35th and 37th among the terminals.

Finally, step S6 is executed, if the result of the detection is that there are output signals at multiple terminals numbered 29, 31, 35, and 37, then continue to use the output signals to determine whether the communication protocol of the host 2 is the PCIe communication protocol or USB 3.0 communication According to the protocol, if the result of the detection is that there are no output signals at the terminals numbered 29, 31, 35 and 37, the detection method is terminated.

In summary, the present disclosure provides an electronic card and a detection method thereof, wherein the electronic card of the present disclosure includes a first firmware unit for executing the SATA communication protocol, a second firmware unit for executing the PCIe communication protocol, and a second firmware unit for executing the PCIe communication protocol. The third firmware unit that executes the USB 3.0 communication protocol, and the electronic card uses this detection method to directly detect that the communication protocol of the host is the SATA communication protocol, the PCIe communication protocol or the USB 3.0 communication protocol, and then automatically executes the corresponding firmware unit. Compared with traditional electronic cards that only carry a single communication protocol and cannot automatically detect the communication protocol carried by the host when assembled to the host, the convenience of the electronic card of the present disclosure can be greatly improved.

Claims (18)

1. A detection method, suitable for an electronic card, characterized in that the electronic card includes a connector, and the connector includes a plurality of terminals, and the electronic card receives through at least one corresponding terminal in the plurality of terminals An output signal sent by a host, the detection method includes steps: Step a: Detect whether the output signal exists in a plurality of terminals numbered 17th, 19th, 23rd and 25th or a plurality of terminals numbered 5th, 7th, 11th and 13th; Step b: If the result of the detection is that there are output signals from multiple terminals numbered 17, 19, 23, and 25 or multiple terminals numbered 5, 7, 11, and 13, it is determined that the communication protocol of the host is A PCIe communication protocol, and terminate the detection method, if the detection result is that multiple terminals numbered 17, 19, 23 and 25 and multiple terminals numbered 5, 7, 11 and 13 do not exist When the signal is output, perform step c; Step c: Detect whether the output signal exists in a plurality of terminals numbered 41st, 43rd, 47th and 49th among the plurality of terminals; Step d: If the result of the detection is that the output signals are present in a plurality of the terminals numbered 41, 43, 47 and 49, use the output signals to determine that the communication protocol of the host is the PCIe communication protocol or a SATA communication agreement, and terminate the detection method, if the result of the detection is that the output signal does not exist in a plurality of terminals numbered 41st, 43rd, 47th and 49th, execute step e; Step e: Detecting whether the output signal exists in a plurality of terminals numbered 29th, 31st, 35th and 37th among the plurality of terminals; and Step f: If the result of the detection is that the output signals are present in multiple terminals numbered 29th, 31st, 35th and 37th, use the output signals to determine that the communication protocol of the host is the PCIe communication protocol or a USB 3.0 communication protocol , and terminate the detection method, if the result of the detection is that there is no output signal at the terminals numbered 29th, 31st, 35th and 37th, the detection method is terminated. 2. The detection method as claimed in claim 1, further comprising in step d, if the result of the detection is that the output signals are present in a plurality of terminals numbered 41, 43, 47 and 49, the output signals are also used It is determined that the communication protocol of the host is the PCIe communication protocol based on a pressure difference range. 3. The detection method as claimed in claim 1, further comprising in step d, if the result of the detection is that the output signals are present in a plurality of terminals numbered 41, 43, 47 and 49, the output signals are also used It is determined that the communication protocol of the host computer is the SATA communication protocol based on a pressure difference range. 4. The detection method as claimed in claim 1, further comprising in step f, if the result of the detection is that the output signal is present in a plurality of terminals numbered 29, 31, 35 and 37, the output signal is also used It is determined that the communication protocol of the host is the PCIe communication protocol based on a pressure difference range. 5. The detection method as claimed in claim 1, further comprising in step f, if the result of the detection is that the output signal is present at a plurality of terminals numbered 29, 31, 35 and 37, the output signal is also used It is determined that the communication protocol of the host is the USB 3.0 communication protocol based on a pressure difference range. 6. The detection method as claimed in claim 1, further comprising in step d, if the result of the detection is that the output signals are present in a plurality of terminals numbered 41, 43, 47 and 49, a physical layer is also used Determine the communication protocol of the output signal as the PCIe communication protocol or the SATA communication protocol by the definition of the signal, and when the communication protocol of the output signal is the PCIe communication protocol, determine that the communication protocol of the host computer is the PCIe communication protocol, When the communication protocol of the output signal is the SATA communication protocol, it is determined that the communication protocol of the host is the SATA communication protocol. 7. The detection method as claimed in claim 1, further comprising in step f, if the result of the detection is that the output signals are present in a plurality of terminals numbered 29, 31, 35 and 37, a physical layer is also used Define the signal to determine that the communication protocol of the output signal is the PCIe communication protocol or the USB 3.0 communication protocol, and when the communication protocol of the output signal is the PCIe communication protocol, determine that the communication protocol of the host is the PCIe communication protocol When the communication protocol of the output signal is the USB 3.0 communication protocol, it is determined that the communication protocol of the host is the USB 3.0 communication protocol. 8. A detection method applicable to an electronic card, characterized in that the electronic card includes a connector, and the connector includes a plurality of terminals, and the electronic card receives through at least one corresponding terminal of the plurality of terminals An output signal sent by a host, the detection method includes steps: Step a sets an action set comprising a first action, a second action and a third action, wherein the first action is to detect a plurality of terminals numbered 5th, 7th, 11th and 13th or 17th, 19, 23 and 25 a plurality of this terminal whether there is this output signal, and judge the communication protocol of this main frame is a PCIe communication protocol when the detection result is yes, and this second action is that detection number is the 41st, 43rd, 47th and Whether the multiple terminals of 49 have the output signal, and when the detection result is yes, continue to correspondingly determine that the communication protocol of the host computer is the PCIe communication protocol or a SATA communication protocol according to the output signal, and the third action is the detection number Whether the plurality of terminals of the 29th, 31st, 35th and 37th have the output signal, and when the detection result is yes, continue to correspondingly determine that the communication protocol of the host computer is the PCIe communication protocol or a USB 3.0 communication protocol according to the output signal ; Step b: Execute any one of the first action, the second action, and the third action, and terminate the detection method when the communication protocol of the host is determined, otherwise enter the next step; Step c executes any action in the action set except the action performed in step b, and terminates the detection method when the communication protocol of the host is determined, otherwise enters the next step; and Step d executes the remaining actions in the action set except the actions executed in step b and step c, and terminates the detection method. 9. The detection method according to claim 8, further comprising performing the first action in step b. 10. The detection method according to claim 9, further comprising performing the second action in step c. 11. The detection method according to claim 8, wherein in the second action, if the result of the detection is that the output signals are present at a plurality of the terminals numbered 41, 43, 47 and 49, the output signal is also used It is determined that the communication protocol of the host computer is the PCIe communication protocol based on a pressure difference range of the signal. 12. The detection method according to claim 8, wherein in the second action, if the result of the detection is that the output signals are present at a plurality of terminals numbered 41st, 43rd, 47th and 49th, the output signal is also used It is determined that the communication protocol of the host computer is the SATA communication protocol based on a pressure difference range of the signal. 13. The detection method according to claim 8, wherein in the third action, if the result of the detection is that the output signals are present at a plurality of the terminals numbered 29, 31, 35 and 37, the output signal is also used It is determined that the communication protocol of the host computer is the PCIe communication protocol based on a pressure difference range of the signal. 14. The detection method according to claim 8, wherein in the third action, if the result of the detection is that the output signals are present at a plurality of the terminals numbered 29, 31, 35 and 37, the output signal is also used It is determined that the communication protocol of the host is the USB 3.0 communication protocol based on a pressure difference range of the signal. 15. The detection method according to claim 8, wherein in the second action, if the result of the detection is that the output signals are present at a plurality of terminals numbered 41, 43, 47 and 49, a physical The layer defines the signal to determine that the communication protocol of the output signal is the PCIe communication protocol or the SATA communication protocol, and when the communication protocol of the output signal is the PCIe communication protocol, determine that the communication protocol of the host is the PCIe communication protocol , when the communication protocol of the output signal is the SATA communication protocol, it is determined that the communication protocol of the host is the SATA communication protocol. 16. The detection method according to claim 8, wherein in the third action, if the result of the detection is that the output signals are present at a plurality of terminals numbered 29, 31, 35 and 37, a physical Layer defines the signal to determine that the communication protocol of the output signal is the PCIe communication protocol or the USB 3.0 communication protocol, and when the communication protocol of the output signal is the PCIe communication protocol, determine that the communication protocol of the host is the PCIe communication protocol, when the communication protocol of the output signal is the USB 3.0 communication protocol, it is determined that the communication protocol of the host is the USB 3.0 communication protocol. 17. An electronic card that communicates with a host, characterized in that the electronic card includes: A first firmware unit, used to execute a SATA communication protocol; A second firmware unit, used to execute a PCIe communication protocol; A third firmware unit, used to execute a USB 3.0 communication protocol; A connector, which is a medium for mutual communication with the host, and the connector also includes a plurality of terminals, and the electronic card receives an output signal from the host through at least one corresponding terminal of the plurality of terminals; a switch unit electrically connected to a plurality of the terminals; Wherein, the switch unit executes the detection method according to claim 1, and correspondingly executes the first firmware unit, the second firmware unit or the third firmware unit according to the result of the detection method. 18. The electronic card as claimed in claim 17, wherein, when the switch unit determines that the communication protocol of the host computer is the SATA communication protocol after the detection method ends, the switch unit executes the first firmware unit, so that the The electronic card and the host communicate with each other through the SATA communication protocol, and when the switch unit determines that the communication protocol of the host is the PCIe communication protocol after the detection method is completed, the switch unit executes the second firmware unit so that the The electronic card and the host communicate with each other using the PCIe communication protocol, and the switch unit executes the third firmware unit when the switch unit determines that the communication protocol of the host is the USB 3.0 communication protocol after the detection method is completed, so that The electronic card and the host communicate with each other through the USB3.0 communication protocol.