Biometric sensing chip and electronic device

Abstract

The embodiment of the specification provides a kind of biological characteristic sensing chip and electronic equipment, by being arranged in biological characteristic sensing chip biological characteristic acquisition unit and processing unit, processing unit includes data processing unit, first storage unit and signal transceiver unit, and processing unit is equipped with first pin, second pin and third pin;Data processing unit connects signal transceiver unit and first storage unit;Signal transceiver unit connects second pin, third pin, and signal transceiver unit is communicatively connected the processor of the electronic equipment where it is located;First pin, second pin and third pin are respectively connected the fourth pin, fifth pin and sixth pin of biological characteristic acquisition unit.The biological characteristic sensing chip can improve biological characteristic detection security.

Description

Technical Field

[0001] This application relates to the field of bioinformatics detection technology, and in particular to a biometric sensing chip and an electronic device. Background Technology

[0002] With technological advancements, to enhance the security of electronic devices, biometric identification chips are typically embedded within them as biometric locks. These locks determine whether to unlock by comparing the collected biometric features with preset biometric features. However, current biometric identification chips generally only function as biometric collection devices; biometric matching is usually accomplished by the electronic device's host system.

[0003] Taking a fingerprint chip as an example, when the fingerprint sensing area detects a user's fingerprint, it will collect and record the fingerprint image. Then, the fingerprint chip will send the collected fingerprint image to the host system of the electronic device. In the host system, the fingerprint image is matched with the owner's fingerprint. If the match is successful, the electronic device will be unlocked; otherwise, the unlocking will fail.

[0004] After acquiring the fingerprint image, the above method needs to send the fingerprint image to the host system through information exchange. This process is vulnerable to attacks and can lead to the leakage of user privacy, resulting in low security for fingerprint recognition.

[0005] There is currently no effective solution to the problem of low security in biometric detection. Utility Model Content

[0006] The purpose of this specification is to provide a biometric sensing chip and an electronic device to solve the problem of low security in biometric identification.

[0007] To address the aforementioned technical problems, this specification provides a biometric sensing chip in its first aspect, comprising:

[0008] Biometrics acquisition and processing unit

[0009] The processing unit includes a data processing unit, a first storage unit, and a signal transceiver unit, and the processing unit is provided with a first pin, a second pin, and a third pin;

[0010] The data processing unit is connected to the signal transceiver unit and the first storage unit;

[0011] The signal transceiver unit is connected to the second pin and the third pin, and the signal transceiver unit is communicatively connected to the processor of the electronic device in which it is located;

[0012] The first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit.

[0013] In some embodiments of this specification, the first pin and the fourth pin are defined as a first pin pair; the second pin and the fifth pin are defined as a second pin pair; the third pin and the sixth pin are defined as a third pin pair; the first pin pair is used to transmit a first signal emitted by the biometric acquisition unit, the second pin pair is used to transmit a second signal emitted by the signal transceiver unit, and the third pin pair is used to transmit a biometric signal emitted by the biometric acquisition unit.

[0014] In some embodiments of this specification, the first pin and the fourth pin are int pins, the second pin and the fifth pin are rst pins, and the third pin and the sixth pin are spi pins.

[0015] In some embodiments of this specification, the first signal is a high level. When the biometric acquisition unit senses the object to be detected, it pulls the fourth pin high and transmits the first signal through the first pin pair, so that the signal transceiver unit transmits the second signal through the second pin pair.

[0016] In some embodiments of this specification, when the data processing unit detects that the first pin is at a high level, the signal transceiver unit is woken up and transmits a reset signal through the second pin.

[0017] In some embodiments of this specification, the biometric acquisition unit includes a sensing unit and an analog-to-digital conversion unit; the sensing unit is connected to the analog-to-digital conversion unit.

[0018] The sensing unit is used to sense the biometric information of the object to be detected after receiving the second signal at the fifth pin, and send the biometric information to the analog-to-digital conversion unit;

[0019] The analog-to-digital conversion unit is used to convert the biometric information into a biometric signal after receiving the biometric information, and transmit the biometric signal through the third pin.

[0020] In some embodiments of this specification, the processing unit further includes a second storage unit connected to the signal transceiver unit and the data processing unit, and the second storage unit is used to receive biometric signals transmitted by the signal transceiver unit.

[0021] In some embodiments of this specification, if the biometric signal is successfully identified, the data processing unit stores the biometric signal stored in the second storage unit into the first storage unit.

[0022] In some embodiments of this specification, the data processing unit is connected to the processor via a USB bus.

[0023] A second aspect of this specification provides an electronic device, including a processor and the biometric sensing chip described in the first aspect above;

[0024] The biometric sensing chip includes a biometric acquisition unit and a processing unit;

[0025] The processing unit includes a data processing unit, a first storage unit, and a signal transceiver unit, and the processing unit is provided with a first pin, a second pin, and a third pin; the data processing unit is connected to the signal transceiver unit and the first storage unit; the signal transceiver unit is connected to the second pin and the third pin; the first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit;

[0026] The signal transceiver unit is communicatively connected to the communication port of the processor.

[0027] The biometric sensing chip and electronic device provided in this specification, by incorporating a biometric acquisition unit and a processing unit within the biometric sensing chip, wherein the processing unit includes a data processing unit, a first storage unit, and a signal transceiver unit, and is provided with a first pin, a second pin, and a third pin; the data processing unit is connected to the signal transceiver unit and the first storage unit; the signal transceiver unit is connected to the second pin and the third pin, and the signal transceiver unit is communicatively connected to the processor of the electronic device; the first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit. By incorporating a biometric acquisition unit and a processing unit within the biometric sensing chip, and through signal interaction between the multiple pins of the biometric acquisition unit and the processing unit, biometric information identification and judgment can be achieved within the biometric sensing chip itself, eliminating the need for interaction between the biometric sensing chip and the processor within the electronic device, thus protecting the user's biometric information and improving the security of biometric detection. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The diagram shown is a schematic diagram of an electronic device provided in an embodiment of this specification;

[0030] Figure 2 The diagram shown is a schematic of a biometric sensing chip provided in an embodiment of this specification.

[0031] The reference numerals in the above figures are as follows:

[0032] 10. Electronic devices;

[0033] 100. Biometric sensor chip; 200. Processor;

[0034] 110. Processing Unit; 120. Biometric Data Acquisition Unit;

[0035] 111. Data processing unit; 112. First storage unit; 113. Signal transceiver unit; 114. Second storage unit; 121. Sensing unit; 120. Analog-to-digital conversion unit. Detailed Implementation

[0036] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0037] As mentioned earlier, current fingerprint chips only capture fingerprint images and then send them to the device's host system. The host system then recognizes the fingerprint image to determine whether to unlock the electronic device or authorize other functions for the user. However, this method is vulnerable to attacks during fingerprint image transmission, potentially leading to the leakage of user information, resulting in relatively low fingerprint recognition security.

[0038] To address the aforementioned problems, this specification provides a biometric sensing chip in its embodiments, which will be discussed below. Figure 1 The biometric sensing chip in the embodiments of this specification will be described. It should be noted that the terms "part," "unit," etc., used in the following embodiments of this specification refer to specific circuit modules.

[0039] like Figure 1 As shown in the figure, the embodiment of this specification provides a biometric sensing chip that may include a biometric acquisition unit 120 and a processing unit 110. The processing unit 110 includes a data processing unit 111, a first storage unit 112 and a signal transceiver unit 113, and the processing unit 110 is provided with a first pin, a second pin and a third pin.

[0040] The data processing unit 111 is connected to the signal transceiver unit 113 and the first storage unit 112; the signal transceiver unit 113 is connected to the second pin and the third pin, and the signal transceiver unit 113 is communicatively connected to the processor 200 of the electronic device 10; the first pin, the second pin and the third pin are respectively connected to the fourth pin, the fifth pin and the sixth pin of the biometric acquisition unit 120.

[0041] Furthermore, when the biometric acquisition unit 120 senses a target object, it can send a first signal to the processing unit 110 via a fourth pin and a first pin, so that the signal transceiver unit 113 responds to the first signal by sending a second signal to the biometric acquisition unit 120 via a second pin and a fifth pin; the biometric acquisition unit 120, in response to the second signal, acquires the biometric information of the target object and sends the biometric information to the signal transceiver unit 113 of the processing unit 110 via a sixth pin and a third pin, and then sends the biometric information to the data processing unit 111 via the signal transceiver unit 113.

[0042] The data processing unit 111 of the processing unit 110 can output the recognition result corresponding to the biometric information in response to the biometric information, and send the recognition result to the processor of the electronic device, so that the processor controls the electronic device based on the recognition result.

[0043] It is understood that the biometric acquisition unit 120 can be used to sense a target object and acquire its biometric information. Furthermore, when a target object is sensed, the biometric acquisition unit 120 can, through information interaction with the processing unit 110, including a first signal and a second signal, determine whether it is necessary to acquire the target object's biometric information. Subsequently, the processing unit 110 can process the data in response to the biometric information and output the corresponding recognition result. Biometric information recognition can be performed directly within the biometric sensing chip. After recognition is completed, the recognition result only needs to be sent to the processor of the electronic device where the biometric sensing chip is located. The processor can then directly control the electronic device based on the recognition result, without requiring the processor to perform biometric information recognition itself.

[0044] It is understandable that biometric information recognition can be applied to various scenarios such as unlocking, system / app application login, and online payment. Consequently, the processor's control over electronic devices based on the recognition results can include, but is not limited to, unlocking, maintaining lock, system / app application login, and online payment verification.

[0045] In this embodiment of the specification, a biometric acquisition unit 120 and a processing unit 110 are set in the biometric sensing chip, and the biometric information can be identified and judged by the biometric sensing chip through signal interaction between multiple pins of the biometric acquisition unit and the processing unit. This eliminates the need for interaction between the biometric sensing chip and the processor in the electronic device, thereby protecting the user's biometric information and improving the security of biometric detection.

[0046] In some embodiments of this specification, after the biometric acquisition unit 120 sends a first signal to the processing unit 110, the data processing unit 111 of the processing unit 110 may be unable or unwilling to respond to the first signal. For example, the data processing unit 111 of the processing unit 110 or other devices may malfunction and be unable to respond to the first signal, or the data processing unit 111 of the processing unit 110 may determine that a response to the first signal is unnecessary. Consequently, the biometric acquisition unit 120 may also be unable to receive the second signal, unable to acquire biometric information, and the processing unit 110 may also be unable to output a recognition result in response to the biometric information. Of course, when the processing unit 110 malfunctions and is unable to respond to the first signal, it may return an error message to the processor of the electronic device.

[0047] In some embodiments of this specification, after the biometric acquisition unit 120 sends a first signal to the processing unit 110, the processing unit 110 may also respond to the first signal by returning other signals. For example, if the first signal is high, the processing unit 110 may return a low level to the biometric acquisition unit 120 if it determines that the current electronic device is in an unlocked state or other situations where biometric information comparison and identification are not required. Upon receiving the low level, the biometric acquisition unit 120 can then determine that biometric information acquisition is not necessary.

[0048] In some embodiments of this specification, the signal transceiver unit 113 can be electrically connected to the second pin and the third pin, or it can be wirelessly connected to the second pin and the third pin. When a high level is detected on the first pin, the sleep state of the data processing unit 111 is interrupted, it enters a polling state and begins operation. Simultaneously, the signal transceiver unit 113 is also awakened and can generate a reset signal, which is sent to the biometric acquisition unit 120 via the second pin. It can also receive biometric signals sent by the biometric acquisition unit 120 via the third pin, and then send them to the signal transceiver unit 113 via the bus for biometric signal identification. In other embodiments, the reset signal can also be generated after the data processing unit 111 is awakened and sent to the signal transceiver unit 113 via the bus. The signal transceiver unit 113 can then send the reset signal to the biometric acquisition unit 120 via the second pin.

[0049] Furthermore, the first storage unit 112 can store a biometric template as a preset biometric signal. The biometric signal can be a biometric template pre-stored in the first storage unit 112. The template can include the biometrics of the user to whom the electronic device belongs, and is used by the data processing unit 111 to identify the biometric signal.

[0050] For example, when the data processing unit 111 reads multiple preset biometric signals from the first storage unit 112 via the bus in response to the biometric signal and outputs the recognition result, it may specifically include: the data processing unit 111 performs image processing on the biometric signal to extract the biometric features, then reads each preset biometric signal from the first storage unit 112 in sequence, and uses the internal algorithm of the data processing unit 111 to match the biometric features with the preset biometric signals, outputs the matching result as the recognition result, or determines and outputs the recognition result based on the mapping relationship between the matching degree and the recognition result.

[0051] In this embodiment of the specification, biometric matching and identification are performed by the data processing unit 111 of the processing unit 110 of the biometric sensing chip, and the identification result can be output to the processor of the electronic device. The processor does not need to obtain biometric information from the biometric sensing chip, which can reduce the risk of information leakage due to attacks during the transmission of biometric information to the processor and improve the security of biometric identification.

[0052] In some embodiments of this specification, the first pin and the fourth pin are defined as a first pin pair; the second pin and the fifth pin are defined as a second pin pair; the third pin and the sixth pin are defined as a third pin pair; the first pin pair is used to transmit a first signal emitted by the biometric acquisition unit, the second pin pair is used to transmit a second signal emitted by the signal transceiver unit, and the third pin pair is used to transmit a biometric signal emitted by the biometric acquisition unit.

[0053] For example, the pins corresponding to the signal transmission between the biometric acquisition unit 120 and the processing unit 110 can be electrically connected via a line. Furthermore, the first signal generated on the biometric acquisition unit 120 can be transmitted to the first pin of the processing unit 110 via the fourth pin of the biometric acquisition unit 120; the second signal generated by the processing unit 110 can be transmitted to the fifth pin of the biometric acquisition unit 120 via the second pin of the processing unit 110; and the biometric information acquired by the biometric acquisition unit 120 can be transmitted to the third pin of the processing unit 110 via the sixth pin of the biometric acquisition unit 120.

[0054] In some embodiments of this specification, the first and second signals transmitted via pins may carry specific information, which can be used to deduce the function or information that the component sending the signal wants to request. For example, the first signal may carry information such as whether a detected object has been detected and whether information acquisition needs to be triggered, while the second signal may carry instructions on whether to trigger information acquisition. In other embodiments, the first and second signals transmitted via pins may not carry specific information content, but only digital signals. Different digital signals transmitted through different pins can be mapped to different information. For example, the first signal may be a high level, which can be mapped to the biometric acquisition unit 120 detecting a detected object, and the second signal may be a high level, which can be mapped to triggering information acquisition.

[0055] In some embodiments of this specification, the first and second signals transmitted via pins may not need to carry specific information; different levels can be used to identify different information, thereby improving the efficiency of biometric information recognition. For example, the first and second signals interacting between the biometric acquisition unit 120 and the processing unit 110 can be high or low levels. The first and second signals can be transmitted through different pins, allowing for the differentiation of functions for signals with the same level.

[0056] In some embodiments of this specification, the first and fourth pins can be int pins, the second and fifth pins can be rst pins, and the third and sixth pins can be spi pins.

[0057] It is understandable that the int pin can be an interrupt pin; a high level transmitted through the int pin can interrupt the sleep state of the processing unit 110. The rst pin can be a reset pin; a high level on the rst pin can trigger the re-acquisition of biometric information. The spi pin can be a communication pin; biometric signals can be transmitted via communication through the spi pin.

[0058] Furthermore, the first signal can be a high level. When the biometric acquisition unit 120 senses the object to be detected, it can pull the fourth pin high and transmit the first signal through the first pin pair, so that the signal transceiver unit 113 can transmit the second signal through the second pin pair.

[0059] In some embodiments of this specification, when the data processing unit detects that the first pin is at a high level, the signal transceiver unit can be woken up and transmit a reset signal through the second pin.

[0060] For example, when the biometric acquisition unit 120 does not detect the object to be detected, the int pin is at a low level, and the processing unit 110 is in a sleep state. When the biometric acquisition unit 120 detects the object to be detected, the int pin is pulled high. The processing unit 110 senses that the int pin has become high, and the sleep state of the data processing unit 111 is interrupted, that is, the data processing unit 111 is awakened. After the data processing unit 111 is awakened from the sleep state, it sends a reset signal to the biometric acquisition unit 120 through the signal transceiver unit and the rst pin. For example, the reset signal can be a high level. After the data processing unit 111 is awakened from the sleep state, it sends a high level to the signal transceiver unit and transmits it to the rst pin. The rst pin can be pulled high, becoming high. The biometric acquisition unit 120 senses that the rst pin has become high, and can then collect biometric information.

[0061] In some embodiments of this specification, the reset signal may be the rising or falling edge of a level waveform, or a high or low level signal that lasts for a specific period of time.

[0062] refer to Figure 2 As shown, in some embodiments of this specification, the biometric acquisition unit 120 may include a sensing unit 121 and an analog-to-digital conversion unit 122.

[0063] After receiving the reset signal from the second pin, the biometric acquisition unit 120 can sense the biometric information of the object to be detected and send the biometric information to the analog-to-digital conversion unit 122.

[0064] The sensing unit 121 is connected to the analog-to-digital conversion unit 122;

[0065] The sensing unit 121 is used to sense the biometric information of the object to be detected after receiving the second signal at the fifth pin, and send the biometric information to the analog-to-digital conversion unit 122;

[0066] The analog-to-digital conversion unit 122 is used to convert the biometric information into a biometric signal after receiving the biometric information, and transmit the biometric signal through the third pin.

[0067] It is understood that the sensing unit 121 can sense the object to be detected, and when the object is sensed, the fourth pin is pulled high. At this time, the processing unit 110 is awakened and can pull the second pin high, and the high level will be transmitted to the fifth pin. After detecting that the fifth pin is pulled high, the sensing unit 121 will be reset and trigger a biometric information acquisition command to acquire biometric information. The acquired biometric information can be sent to the analog-to-digital conversion unit 122 for analog-to-digital conversion, and then sent to the processing unit 110 through the third pin for subsequent biometric identification.

[0068] For example, taking fingerprint recognition as an example, when a finger presses on the sensing unit 121 in the biometric acquisition unit 120, the int pin is pulled high. At this time, the data processing unit 111 can be woken up from the sleep state in response to the high level of the int pin and start normal operation. At this time, the data processing unit 111 is powered on. After being woken up, the data processing unit 111 can reset the biometric acquisition unit 120 by transmitting a high level to the signal transceiver unit 113 and the rst pin, and control the sensing unit 121 to trigger the fingerprint image acquisition command. The sensing unit 121 starts scanning the fingerprint image, and after scanning, it performs analog-to-digital conversion through the analog-to-digital conversion unit 122 to obtain a digital signal (i.e., biometric signal), and sends the digital signal to the signal transceiver unit 113 of the processing unit 110 through the spi pin, and then forwards it to the data processing unit 111 through the signal transceiver unit 113.

[0069] In some embodiments of this specification, the analog-to-digital conversion unit 122 may include digital circuits and analog circuits, the sensing unit 121 may be connected to the analog circuits to realize the acquisition and processing of biometric information, and the digital circuits are connected to the analog circuits and the SPI pins so that after receiving and performing analog conversion on the biometric information, it can transmit it to the processing unit 110 through the SPI pins.

[0070] In some embodiments of this specification, the data processing unit 111 and the processor can be connected via a Universal Serial Bus (USB) interface. That is, the data processing unit 111 is connected to the processor via the USB bus, so that the data transmission of the biometric sensing chip can be realized only through USB. Compared with the SPI interface, it is not easy to be hijacked and can improve data security.

[0071] refer to Figure 2 As shown, in some embodiments of this specification, the processing unit 110 may further include a second storage unit 114, which is connected to the signal transceiver unit 113 and the data processing unit 111. The second storage unit 114 is used to store the biometric signals transmitted by the third pin pair.

[0072] It is understood that the second storage unit 114 can serve as a temporary storage unit for temporarily storing biometric signals received from the biometric acquisition unit 120, while the first storage unit 112 serves as a permanent storage unit. After receiving the biometric signal through the third pin, the signal transceiver unit 113 can send the biometric signal to the data processing unit 111 and write the biometric signal into the second storage unit 114 to temporarily store the acquired biometric signal.

[0073] In some embodiments of this specification, if multiple biometric signals are successfully identified, the data processing unit 111 stores the biometric signals stored in the second storage unit 114 into the first storage unit 112.

[0074] It is understandable that when the data processing unit 111 determines that the biometric recognition is successful, the biometric signal stored in the second storage unit 114 can also be used as a template for the user's biometrics. The data can be read from the second storage unit 114 and written into the first storage unit 112 to further improve the accuracy of biometric recognition.

[0075] Continue to refer to Figure 1 As shown in the embodiments of this specification, an electronic device 10 is also provided, which may include a processor and the aforementioned biometric sensing chip.

[0076] The biometric sensing chip may include a biometric acquisition unit 120 and a processing unit 110; the processing unit 110 includes a data processing unit 111, a first storage unit 112, and a signal transceiver unit 113, and the processing unit 110 is provided with a first pin, a second pin, and a third pin; the data processing unit 111 is connected to the signal transceiver unit 113 and the first storage unit 112; the signal transceiver unit 113 is connected to the second pin and the third pin; the first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit 120; the signal transceiver unit 113 is communicatively connected to the communication port of the processor 200, so that the processor 200 can be used to receive the recognition result and control the electronic device based on the recognition result.

[0077] The specific composition and working principle of each component unit in the above embodiments can be referred to the relevant description above, and will not be repeated here.

[0078] The following is in conjunction with the appendix Figure 2 Taking fingerprint recognition as an example of biometric identification, the fingerprint recognition process of the electronic device in the embodiments of this specification will be introduced.

[0079] refer to Figure 2As shown, in a fingerprint recognition application scenario, the processing unit 110 in the biometric sensing chip is in a sleep state. When a finger is received pressing the sensing unit 121 in the biometric acquisition unit 120, the int pin is pulled high. The processing unit 110 detects that the int pin has become high, the sleep state is interrupted and awakened, the data processing unit 111 enters the polling state and begins normal operation, and the signal transceiver unit 113, the first storage unit 112, and the second storage unit 114 all start working. At this time, the signal transceiver unit 113 sends a reset signal to the biometric acquisition unit 120 through the rst pin. After receiving the reset signal, the biometric acquisition unit 120 resets and triggers a fingerprint image acquisition command. After receiving the fingerprint image acquisition command, the sensing unit 121 begins to scan the fingerprint image, and the scanned fingerprint image is converted from analog to digital by the analog-to-digital converter unit 122 to obtain the digital signal corresponding to the fingerprint image. The digital signal output by the analog-to-digital converter 122 is sent to the signal transceiver unit 113 of the processing unit 110 via the SPI pin. The signal transceiver unit 113 then sends the digital signal to the data processing unit 111 and the second storage unit 114. Upon receiving the digital signal, the data processing unit 111 performs image processing to extract fingerprint features, reads the fingerprint template from the first storage unit 112, matches the fingerprint features with the fingerprint template, and outputs the recognition result. During the matching process, the matching degree or whether the fingerprint features match the fingerprint template can be output, allowing the final recognition result (whether the recognition was successful) to be determined based on the matching degree or whether the recognition was successful. After outputting the recognition result, the data processing unit 111 can transmit the data via USB to the processor of the electronic device, enabling the processor to directly control the electronic device based on the recognition result. Meanwhile, after the data processing unit 111 outputs the recognition result, if the recognition result is successful, the data processing unit 111 can read the temporarily stored digital signal from the second storage unit 114 and write the digital signal into the first storage unit 112; if the recognition fails, there is no need to write the digital signal into the first storage unit 112.

[0080] This embodiment integrates the biometric acquisition unit 120 and the processing unit 110 into the biometric sensing chip, enabling the biometric sensing chip to perform image storage, image processing, feature extraction, and template matching functions, ensuring the security of biometric identification. Furthermore, the communication between the biometric sensing chip and the processor is achieved via USB, following secure communication protocols for distributed computing environments, such as SDCP (Secure Device Control Protocol), ensuring that the data is not easily attacked or leaked.

[0081] Although the process described above includes multiple operations that occur in a specific order, it should be clearly understood that these processes may include more or fewer operations, which may be executed sequentially or in parallel (e.g., using parallel processors or a multithreaded environment).

[0082] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, system embodiments are basically similar to method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments in this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A biometric sensing chip, characterized in that, include: The biometric feature acquisition unit and the processing unit include a data processing unit, a first storage unit and a signal transceiver unit, and the processing unit is provided with a first pin, a second pin and a third pin; The data processing unit is connected to the signal transceiver unit and the first storage unit; The signal transceiver unit is connected to the second pin and the third pin, and the signal transceiver unit is communicatively connected to the processor of the electronic device in which it is located; The first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit; When the biometric acquisition unit senses an object to be detected, it sends a first signal to the processing unit through the fourth and first pins, so that the signal transceiver unit responds to the first signal by sending a second signal to the biometric acquisition unit through the second and fifth pins; the biometric acquisition unit is also used to acquire the biometric information of the object to be detected in response to the second signal, and send the biometric information to the signal transceiver unit of the processing unit through the sixth and third pins.

2. The biometric sensing chip according to claim 1, characterized in that, The first pin and the fourth pin are defined as a first pin pair; the second pin and the fifth pin are defined as a second pin pair; the third pin and the sixth pin are defined as a third pin pair. The first pin pair is used to transmit a first signal emitted by the biometric acquisition unit, the second pin pair is used to transmit a second signal emitted by the signal transceiver unit, and the third pin pair is used to transmit a biometric signal emitted by the biometric acquisition unit.

3. The biometric sensing chip according to claim 2, characterized in that, The first and fourth pins are int pins, the second and fifth pins are rst pins, and the third and sixth pins are spi pins.

4. The biometric sensing chip according to claim 2, characterized in that, The first signal is high level. When the biometric acquisition unit senses the object to be detected, it pulls the fourth pin high and transmits the first signal through the first pin pair, so that the signal transceiver unit transmits the second signal through the second pin pair.

5. The biometric sensing chip according to claim 2, characterized in that, When the data processing unit detects that the first pin is at a high level, the signal transceiver unit is woken up and transmits a reset signal through the second pin.

6. The biometric sensing chip according to claim 2, characterized in that, The biometric acquisition unit includes a sensing unit and an analog-to-digital conversion unit; the sensing unit is connected to the analog-to-digital conversion unit. The sensing unit is used to sense the biometric information of the object to be detected after receiving the second signal at the fifth pin, and send the biometric information to the analog-to-digital conversion unit; The analog-to-digital conversion unit is used to convert the biometric information into a biometric signal after receiving the biometric information, and transmit the biometric signal through the third pin.

7. The biometric sensing chip according to claim 2, characterized in that, The processing unit further includes a second storage unit, which is connected to the signal transceiver unit and the data processing unit. The second storage unit is used to store the biometric signals transmitted by the third pin pair.

8. The biometric sensing chip according to claim 7, characterized in that, If the biometric signal is successfully identified, the data processing unit stores the biometric signal stored in the second storage unit into the first storage unit.

9. The biometric sensing chip according to claim 1, characterized in that, The data processing unit is connected to the processor via a USB bus.

10. An electronic device, characterized in that, Includes a processor and the biometric sensing chip according to any one of claims 1 to 9; The biometric sensing chip includes a biometric acquisition unit and a processing unit. The processing unit includes a data processing unit, a first storage unit, and a signal transceiver unit, and the processing unit has a first pin, a second pin, and a third pin. The data processing unit is connected to the signal transceiver unit and the first storage unit. The signal transceiver unit is connected to the second pin and the third pin. The first pin, the second pin, and the third pin are respectively connected to the fourth pin, the fifth pin, and the sixth pin of the biometric acquisition unit. When the biometric acquisition unit senses an object to be detected, it sends a first signal to the processing unit through the fourth pin and the first pin, so that the signal transceiver unit responds to the first signal by sending a second signal to the biometric acquisition unit through the second pin and the fifth pin. The biometric acquisition unit is also used to collect biometric information of the object to be detected in response to the second signal, and send the biometric information to the signal transceiver unit of the processing unit through the sixth pin and the third pin. The signal transceiver unit is communicatively connected to the communication port of the processor.

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