CN106815565A - A kind of capacitance type fingerprint identification chip, mobile terminal and chip controls method - Google Patents
A kind of capacitance type fingerprint identification chip, mobile terminal and chip controls method Download PDFInfo
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- CN106815565A CN106815565A CN201611239828.8A CN201611239828A CN106815565A CN 106815565 A CN106815565 A CN 106815565A CN 201611239828 A CN201611239828 A CN 201611239828A CN 106815565 A CN106815565 A CN 106815565A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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Abstract
The present invention relates to semiconductor applications, a kind of capacitance type fingerprint identification chip, mobile terminal and chip controls method are disclosed.In present embodiment, there is provided a kind of capacitance type fingerprint identification chip, including：Induction arrays, the first analog-digital converter, the second analog-digital converter, data selector, AFE(analog front end) AFE and processing module；Data selector is connected with the first analog-digital converter, the second analog-digital converter and processing module respectively.Present embodiment additionally provides mobile terminal corresponding with the chip and chip controls method.Embodiment of the present invention so that capacitance type fingerprint identification chip has expanded function.
Description
Technical field
The present invention relates to semiconductor applications, more particularly to a kind of capacitance type fingerprint identification chip, mobile terminal and chip control
Method processed.
Background technology
Capacitance type fingerprint identification chip refers to the chip product of embedded capacitive fingerprint identification technology, can realize fingerprint on piece
IMAQ, feature extraction, the chip of aspect ratio pair., capacitive sensor technology be employ alternately order and arrange and
Sensor electroplax, the form of alternate plates is two capacitor boards, and fingerprint mountain valley and ridge turn into plate between dielectric, two
The dielectric sensor detection of constant between person changes to generate fingerprint image.By capacitance type fingerprint identification chip, exploitation
Person can easily realize the function of fingerprint recognition, greatly reduce the threshold of fingerprint recognition industry, the popularization to fingerprint recognition
With very positive impetus.
But inventor realize it is of the invention during find, current capacitance type fingerprint identification chip can only realize list
One sensing fingerprint recognition, does not possess expanded function, other induction chips similarly problem with unitary function, so mobile
Terminal when multiplex induction function is realized, need to using multiple capacitance type fingerprint induction chip when, if also to increase other functions
Sensor, for example, pressure sensor, then need to increase pressure sensor chip in mobile terminal, increases mobile terminal hardware
Volume causes that the number of chips in terminal is more.
The content of the invention
The purpose of embodiment of the present invention be provide a kind of capacitance type fingerprint identification chip, fingerprint recognition touch control method and
Mobile terminal so that capacitance type fingerprint identification chip has expanded function.
In order to solve the above technical problems, embodiments of the present invention provide a kind of capacitance type fingerprint identification chip, including：
Induction arrays, the first analog-digital converter, the second analog-digital converter, data selector, AFE(analog front end) AFE and processing module；Data
Selector is connected with first analog-digital converter, second analog-digital converter and the processing module respectively；Induction arrays, for adopting
Collection finger print data, and the finger print data is transmitted to first analog-digital converter；First analog-digital converter, for the fingerprint number
According to analog-to-digital conversion is carried out, the first data are obtained, and by the first data transmission to the data selector；AFE, for receiving second
Data, and by second data transfer to second analog-digital converter；Second analog-digital converter, for being carried out to second data
Analog-to-digital conversion, obtains the 3rd data, and by the 3rd data transfer to the data selector；Data selector, for by this
One data and the 3rd data transfer are to the processing module；Processing module, for being carried out to first data and the 3rd data
Treatment.
Embodiments of the present invention additionally provide a kind of mobile terminal, comprising：Sensor and capacitance type fingerprint identification chip；
Sensor and AFE(analog front end) AFE are connected, and second data are the data from the sensor.
Embodiments of the present invention additionally provide a kind of chip controls method, are applied to capacitance type fingerprint identification chip, core
Piece control method, including：Whether detection induction arrays receive finger print data；After the finger print data is received, data selection
Device is by first data and the 3rd data transfer to processing module.
Embodiment of the present invention in terms of existing technologies, by the second analog-digital converter and data selector, is processed
Data from AFE(analog front end) AFE, the first data are processed by induction arrays and the first analog-digital converter so that chip is being realized
Other signals can be recognized while fingerprint recognition, the expanded function of chip is increased；Due to existing chip special function
It is familiar with by technical staff, and the present inventor breaches the design philosophy of special function, the function to chip is done and can be opened up
Malleability is designed so that mobile terminal need not increase extra touch chip and be capable of achieving fingerprint recognition and other expanded functions, subtract
The quantity of chip in mobile terminal is lacked, so as to reduce the volume of mobile terminal hardware.
In addition, the input of AFE is sensor connection end, it is sensor connection end by the input for limiting AFE so that
AFE receives the signal of sensor, and lifting chip processes the speed of sensor signal.
In addition, the quantity of sensor connection end is more than 1, each connection end connects a sensor.Sensed by limiting
Device connection end quantity has multiple, it is ensured that the sensor of expansible connection has multiple.
In addition, the quantity of sensor connection end is 6.By limiting sensor connection end quantity as 6, it is ensured that expansible
The sensor of connection has 6.
In addition, processing module includes：Processor and digital signal processor, the processor and the data selector are connected.
Substantial amounts of data are processed by digital signal processing module, the digital signal processing module speed of service is fast, so that chip is transported
It is capable to be faster connected with data selector by processor, pending data can be selected according to data selector.
In addition, processor, for processing first data, the 3rd data transfer to the numeral for being additionally operable to receive is believed
Number processor；The digital signal processor, for processing the 3rd data.First data, data signal are processed by processor
Processor processes the 3rd data, separately processes the first data and the 3rd data, accelerates the processing speed of data.
In addition, processor, for processing the 3rd data, the first data transmission to the numeral for being additionally operable to receive is believed
Number processor；The digital signal processor, for processing first data.3rd data are processed by processor, and by first
Data are transferred to digital signal processor processes, have further speeded up the processing speed of data.
In addition, processor, for processing first data and the 3rd data；When first data and the 3rd data surpass
When crossing the disposal ability of the processor, the first subdata in first data and the 3rd data is transmitted to the data signal
Processor；The digital signal processor, for processing first subdata.First data and the 3rd number are processed by processor
According to the data transfer beyond processor disposal ability to digital signal processor processes, accelerating the speed of data processing.
In addition, chip also includes：Interface, the interface is connected with the processing module, for exporting the 4th data and the 5th number
According to；Wherein, the 4th data process first data and obtain by the processing module, and the 5th data are by the processing module
The 3rd data are managed to obtain.By interface, chip is communicated with outside mainboard.
In addition, interface is two-wire system serial line interface I2C or four-wire system serial line interface SPI.By two-wire system serial line interface I2C
Or four-wire system serial line interface SPI and external communication, two-wire system serial line interface I2The output data of C or four-wire system serial line interface SPI
Speed is fast, accelerates chip with outside mainboard communication speed.
In addition, interface is included：SPI and I2C；SPI, for exporting the 4th data；I2C, for exporting the 5th data.
By using I2Two interfaces of C and SPI, export the 4th data and the 5th data respectively, have further speeded up chip and outside master
The speed of plate communication.
Brief description of the drawings
Fig. 1 is a kind of structural representation of capacitance type fingerprint identification chip of first embodiment of the invention；
Fig. 2 is a kind of structural representation of capacitance type fingerprint identification chip of second embodiment of the invention；
Fig. 3 is a kind of structural representation of capacitance type fingerprint identification chip of third embodiment of the invention；
Fig. 4 is a kind of structural representation of mobile terminal of four embodiment of the invention；
Fig. 5 is a kind of structural representation of mobile terminal of fifth embodiment of the invention；
Fig. 6 is a kind of control method flow chart of capacitance type fingerprint identification chip of sixth embodiment of the invention；
Fig. 7 is a kind of control method flow chart of capacitance type fingerprint identification chip of seventh embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to each reality of the invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each implementation method of the invention,
In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and base
Many variations and modification in following implementation method, it is also possible to realize the application technical scheme required for protection.
First embodiment of the invention is related to a kind of capacitance type fingerprint identification chip.Capacitance type fingerprint identification chip application
In terminal, terminal can be mobile phone, PAD etc..Concrete structure is as shown in figure 1, it is included but is not limited to：Induction arrays 101, first
The analog-digital converter 104 of analog-digital converter 102, AFE(analog front end) (AFE) 103, second, data selector 105, the and of processing module 106
Interface 107.
Induction arrays 101, for gathering finger print data, and the finger print data are transmitted to first analog-digital converter 102.
Wherein, induction arrays 101 are connected with the first analog-digital converter 102.Induction arrays 101 can be fingerprint recognition pixel sensing battle array
Row (Finger Print Pixel Array), when finger is pressed against on the induction arrays 101, the collection of induction arrays 101 refers to
Line data, the first analog-digital converter of finger print data output valve 102. that will be collected
First analog-digital converter 102, for carrying out analog-to-digital conversion to the finger print data, obtains the first data, and by this
One data transfer is to the data selector.Wherein, the first analog-digital converter 102 is connected with data selector 105.First modulus turns
Parallel operation 102 receives the finger print data from the transmission of induction arrays 101, and the finger print data of analog signal is converted into data signal,
The data signal is denoted as the first data, and by the digital data transmission after conversion to data selector 103.
AFE(analog front end) (AFE) 103, for receiving the second data, and by second data transfer to second analog-to-digital conversion
Device 104.The input of AFE(analog front end) (AFE) is sensor connection end, for connecting sensor.AFE(analog front end) (AFE) 104 pairs is adopted
The touch-control sensing signal of collection is amplified, frequency conversion, noise processed etc..Treated signal is denoted as the second data, and
Transmit to the second analog-digital converter 104 being connected with AFE(analog front end) (AFE).
Second analog-digital converter 104, for carrying out analog-to-digital conversion to second data, obtains the 3rd data, and by this
Three data transfers are to the data selector.Second analog-digital converter 104 is connected with data selector 105.Second analog-digital converter
104 receive the second data, and carry out analog-to-digital conversion to the second data, are converted to data signal, are denoted as the 3rd data, and by this
Three data transfers are to data selector 105.
Data selector 105, for by first data and the 3rd data transfer to the processing module.Data converter
105 are connected with the first analog-digital converter, the second analog-digital converter and processing module respectively.Data, data selector 105 is received and
The first data from the first analog-digital converter and the 3rd data from the second analog-digital converter, in the control of address signal
Under, the corresponding data of needs is exported from data selector 105, and send data to processing module 106.
Processing module 106, for processing first data and the 3rd data.106 pairs first numbers of processing module
According to that is, the finger print data for collecting processed, for example, the feature recognition of fingerprint, extracting and ratio is matched somebody with somebody.Processing module 106
To the 3rd data processing, for example, calculating the 3rd data by algorithm.
Interface 107, is communicated for chip with outside mainboard.
Specifically, induction arrays 101 are connected with the first analog-digital converter 103, AFE(analog front end) (AFE) 104 and the second mould
Number converter 105 is connected, data selector 105 respectively with the first analog-digital converter 102, the second analog-digital converter 104 and treatment
Module 106 is connected.When finger is pressed against on the induction arrays 101, chip gathers finger print data, sense by induction arrays 101
Answer the number of array 101 not limit, number can be set according to actual needs, fingerprint surface is concavo-convex surface, by sense
Array 101 is answered, the fingerprint number of different voltage signals, the continuous analog signal of formation, and the analog signal that will be collected is produced
According to transmitting to the first analog-digital converter 102, the first analog-digital converter 102 receives the finger print data of analog signal, to the fingerprint
Data carry out analog-to-digital conversion, are converted to data signal, are denoted as the first data, and by the first data transmission to data selector
105.The input of AFE(analog front end) (AFE) 104 is connected for sensor, end, and the quantity of connection end is more than 1, and each connection end can
To connect a sensor.Illustrated with the quantity of connection end as 6 in the present embodiment.Sensor signal is believed for simulation
Number, AFE(analog front end) (AFE) 104 receives the analog signal of sensor transmissions, and the analog signal is amplified, frequency conversion and
Noise processed etc., obtains the second data, and AFE(analog front end) (AFE) 104 enters second data transfer to the second analog-digital converter 104
Row analog-to-digital conversion, so as to obtain the 3rd data, the second analog-digital converter 104 is by the 3rd data transfer to data selector 105.
Data selector 105 receives the first data from the first analog-digital converter 102 and from the second analog-digital converter
The 3rd data.Data selector selects corresponding data transfer to processing module 106 according to given input address code,
Data selector can select 1,4 to select 1,8 to select 1 type for 2.For example, 4 select 1 data selector, D0 to D3 is data input pin, Y
It is data output end, A0, A1 are address input end, the first data are input into from the D0 ends of data selector, the 3rd data are from data
Selector D2 ends are input into, and now given input address are that 0, A1 is 1 for A0, then what is exported from Y is the 3rd data.
Processing module 106 receives the first data, and the sampling of fingerprint characteristic is carried out to finger print data, extract and match etc.
Reason.To the 3rd data for receiving, the transducing signal to collecting carries out calculating treatment.
In terms of existing technologies, the capacitance type fingerprint chip for being provided in present embodiment passes through AFE(analog front end) (AFE)
Collection sensor signal, is amplified, frequency conversion, noise processed to sensor signal, and carries out analog-to-digital conversion to the signal,
Enable that chip accurately processes input signal, by data selector so that fingerprint recognition chip can selectively process fingerprint
Two kinds of signals of data and sensor signal, increased the expanded function of capacitance type fingerprint identification chip.
Second embodiment of the present invention is related to a kind of capacitance type fingerprint identification chip.Second embodiment is the first implementation
Improvement, mainly the improvement is that：In this second embodiment, processing module is further separated into：Processor and data signal
Processor, and different data are processed by different processors.Concrete structure is as shown in Figure 2.
Processor 1061, for processing first data, the 3rd data transfer to the numeral for being additionally operable to receive is believed
Number processor.
Digital signal processor 1062, for processing first data.
Specifically, processor 1061 and digital signal processor 1062 are connected.Processor 1061 can use microcontroller
Unit (MCU), MCU is also referred to as single-chip microcomputer, and MCU is integrated with central processing unit, memory, counter and input/output end port, when connecing
When receiving the first data, MCU operationally will automatically, continuously from memory take out computational methods, step, operational order
The program of programming, and performing, for example, carry out the extraction of fingerprint characteristic to finger print data, analysis, than with etc..Digital processing unit
1062, it is that the continuous analog signal of real world is measured and filtered, processing speed is than MCU faster, substantial amounts of processing
During data, digital signal processor has faster CPU, and arithmetic speed is faster.Processor 1061 processes the first data, also by the
Three data transfers are to digital signal processor 1062.
Additionally, processor 1061, it is additionally operable to process the 3rd data, and by first data transmission to digital signal processor.
Digital signal processor 1062, for processing the first data.Processor 1061 can be also used for processing the first data and the 3rd number
According to when the first data and the 3rd data exceed the disposal ability of processor, by the first son in the first data and the 3rd data
Data transfer to digital signal processor 1062, digital signal processor 1062 processes first subdata.Digital Signal Processing
The memory capacity of device 1062 is bigger, and processing speed is faster.
For example, a frame signal is 30ms, a frame signal Processing Algorithm program must be completed in 30ms, if the finger of processor
The cycle is made for 20ns, then the maximum operand that a frame time inner treater can be provided is 1,500,000 instructions, now, during a frame
Between the instruction of inner treater 1,600,000, then beyond the operand of processor, the data having more then are transferred to as the first subdata
Digital signal processor carries out computing.
The capacitance type fingerprint identification chip provided in the present embodiment, processing module includes processor and Digital Signal Processing
Device, the arithmetic speed of digital signal processor faster, by using two processors, it is ensured that carrying out mass data treatment
When, processing module can quick processing data.
Third embodiment of the present invention is related to a kind of capacitance type fingerprint identification chip.3rd implementation method is the second implementation
Improvement, mainly the improvement is that：In the third embodiment, capacitance type fingerprint chip is two-wire system also comprising interface 107
Serial line interface I2C and four-wire system serial line interface SPI, interface 107 is connected with processing module 106, and interface 107 is used for output data.
Concrete structure is as shown in Figure 3.
Present embodiment includes two-wire system serial line interface (I with interface 1072C) 1071 or four-wire system serial line interface (SPI)
Illustrated as a example by 1072.
Two-wire system serial line interface (I2C) 1071, for exporting the 4th data, wherein, the 4th data pass through the processing module
106 process first data obtains.
Four-wire system serial line interface (SPI) 1072, for exporting the 5th data, wherein, the 5th data pass through processing module 106
The 3rd data are processed to obtain.
Specifically, I2C and SPI is connected with treatment, for exporting the 4th data and the 5th data, the wherein transmission of SPI
Speed is faster than I2The transmission speed of C, the first data are finger print data, and data volume is big, using the faster SPI interface of transmission speed with
Outside motherboard platform communication, the 3rd data are the data of sensor signal, use I2C interface can be satisfied with outside motherboard platform
Communication.
Additionally, it is noted that interface 107, can be two-wire system serial line interface I2C or four-wire system serial line interface SPI,
Can also be two-wire system serial line interface I2C and four-wire system serial line interface SPI.
The capacitance type fingerprint identification chip for providing in the present embodiment, is communicated by interface with outside mainboard, is connect
Mouth uses two-wire system serial line interface (I simultaneously2C) 1071 and four-wire system serial line interface (SPI), substantial amounts of data are communicated
When, can quickly transmit, time delay is not resulted in, influence the use of user.
It is noted that each module involved in present embodiment is logic module, in actual applications, one
Individual logic unit can be a part for a physical location, or a physical location, can also be with multiple physics lists
The combination of unit is realized.Additionally, in order to protrude innovative part of the invention, will not be with solution institute of the present invention in present embodiment
The unit that the technical problem relation of proposition is less close is introduced, but this is not intended that in present embodiment do not exist other lists
Unit.
Four embodiment of the invention be related to a kind of mobile terminal, mobile terminal 400, concrete structure as shown in figure 4, comprising
But it is not limited to：Sensor 200 and capacitance type fingerprint chip 100.
Specifically, sensor 200 is connected with the AFE(analog front end) (AFE) 103 in capacitance type fingerprint chip 100, the second number
According to being the data from sensor.Wherein, the input of AFE(analog front end) (AFE) 103 is sensor connection end, the number of connection end
Amount is more than 1, and attachable sensor can be 2,4,6.In the present embodiment, the quantity of sensor connection end is 6
Individual, the sensor of connection is 1.Sensor 200 can be pressure sensor, when pressure sensor detects pressure, by life
Into pressure sensor signal by sensor sensing channel transfer to capacitance type fingerprint chip 100 AFE(analog front end) (AFE) 103,
Signal amplification is carried out by 103 pairs of the second data of AFE(analog front end) (AFE), after frequency conversion and noise processed, is transmitted to the second mould
Number converter 104, obtains the 3rd data, and transmit to data selector 105 by analog-to-digital conversion；Meanwhile, capacitance type fingerprint core
Piece 100 gathers finger print data, and finger print data is transmitted to the first analog-digital converter 102, by mould by induction arrays 101
Number is converted to the first data, and by the first data transmission to data selector 105, data selector 105 can be by elder generation
To enter first go out FIFO memory and processor communication, processing module 106 processes the first data first, if having the first data, data
Selector 105 is switched to the 3rd data of selection, and the 3rd data are processed by processing module 106, if without the first data, not to the
Three data are processed.
It is noted that the sensor that sensor connection end can have multiple, connection can have multiple, it is also possible to only
One does not use sensor connection end, using only the fingerprint identification function of capacitance type fingerprint identification chip, not extension sensor
Function.
In terms of existing technologies, a kind of terminal for being provided in present embodiment, is recognized by using capacitance type fingerprint
Chip is connected with sensor, and need not increase new sensor chip, realizes the expanded function of capacitance type fingerprint identification chip；
When sensor signal is processed, capacitance type fingerprint identification chip determines whether to be touched for the finger of people by whetheing there is finger print data
Hair sensor, it is therefore prevented that the maloperation that non-staff is caused so that use more accurate safety in mobile terminal.
5th implementation method of the invention is related to a kind of mobile terminal.5th implementation method is the 4th improvement implemented, main
The improvement is that：In the 5th implementation method, sensor is in key sensor, pressure sensor or proximity transducer
A kind of, or multiple sensors combinations.Present embodiment is illustrated as a example by connecing 3 kinds of combinations of sensor,
As shown in Figure 5.
Mobile terminal 400 includes：2 key sensors 2011 and 2012,2 pressure sensors 2021 and 2022,2 connect
Nearly sensor 2031 and 2032, capacitance type fingerprint identification chip 100, specific connected mode such as Fig. 5.
Specifically, the AFE(analog front end) (AFE) of capacitance type fingerprint chip 100 has 6 sensor connection ends, each connection end
One sensor of connection, as shown in figure 5, CH0 connection ends connection key sensor 2011, CH1 connection ends connection key sensor
2012, CH2 connection ends connect pressure sensor 2021, and CH3 connection ends connect pressure sensor 2022, and CH4 connection ends connect
Nearly sensor 2031, CH5 connection ends connection proximity transducer 2032.
It is noted that mobile terminal can be mobile phone, PAD etc..
The mobile terminal that present embodiment is provided, it is real by using key sensor, pressure sensor and proximity transducer
The Function Extension of capacitance type fingerprint chip is showed, and without increasing the corresponding chip of sensor in addition, in reducing mobile terminal
The usage quantity of chip, so as to reduce the hardware volume of mobile terminal.
It is seen that, present embodiment is the system embodiment corresponding with first embodiment, and present embodiment can be with
First embodiment is worked in coordination implementation.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, repeats no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
Sixth embodiment of the invention is related to a kind of chip controls method.Idiographic flow as shown in fig. 6, including：
Step 601：Detect whether to receive finger print data.If receiving finger print data, step 602 is performed,；If it is not,
Then terminate the flow of present embodiment.
Specifically, in mobile terminal, the AFE of capacitance type fingerprint chip is received from sensing capacitance type fingerprint chip application
The analog signal of device, by after signal method, frequency conversion and noise processed, transmitting to the second analog-digital converter, by mould
Number conversion obtains the 3rd data and an input by data selector is transmitted to data selector, capacitance type fingerprint identification
Chip gathers finger print data by induction arrays, and the first data are generated by the first analog-digital converter, and by data selector
An input transmit to data converter, whether data selector can receive fingerprint according to the signal detection of input
Data, for example, data selector selects 1 type for 4, input is D0 to D3, and the first data generated by finger print data are from data
The D0 inputs input of selector, the 3rd data of sensor signal generation are input into from the D3 inputs of data selector, work as number
When having input signal according to the D0 inputs of selector, judge that chip have received finger print data, otherwise, judge that chip is not received and refer to
Line data.
Step 602：Data selector is by the first data and the 3rd data transfer to processing module.
Specifically, after detection receives finger print data, data selector by the first data and the 3rd data transfer extremely
Processing module carries out data processing.
In terms of existing technologies, the chip controls method that present embodiment is provided, by the data selector of chip
Detect whether to receive finger print data, if receiving finger print data, by the first data and the 3rd data transfer to processing module
Carry out the treatment of data so that when chip has treatment expanded function, with the ability for preventing maloperation, enhance the expansion of chip
Open up the practicality of function.
It is seen that, second embodiment is mutually corresponding with present embodiment, therefore present embodiment can be implemented with first
Mode is worked in coordination implementation.The relevant technical details mentioned in first embodiment in the present embodiment still effectively, the
The technique effect to be reached in one implementation method in the present embodiment similarly it is achieved that in order to reduce repetition, here
Repeat no more.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in first embodiment.
7th implementation method of the invention is related to a kind of mobile terminal.7th implementation method is the 6th improvement implemented, main
The improvement is that：In the 7th implementation method, data selector is by the first data and the 3rd data transfer to processing module
Afterwards, also include, treatment of the processing module to the first data and the 3rd data.Idiographic flow as shown in fig. 7, comprises：
Step 701：Step 601：Detect whether to receive finger print data.If receiving finger print data, step is performed
602,；If it is not, then terminating the flow of present embodiment.
Step 702：Data selector is by the first data and the 3rd data transfer to processing module.
Step 703：Processor processes the first data, by the 3rd data transfer to digital signal processor.
Specifically, processing module includes processor and digital signal processor, and the first data are finger print data, fingerprint number
Big according to amount, processor obtains the instruction of alignment processing fingerprint from memory, and the extraction of fingerprint characteristic is carried out to finger print data, point
Analysis, contrast.And by untreated 3rd data transfer to digital signal processor.
Step 704：The data of digital signal processor processes the 3rd.
Specifically, digital signal processor is that the continuous analog signal of real world is measured and filtered, numeral
The processing speed of signal processor faster, can process substantial amounts of data and be calculated.Digital signal processor processes the 3rd are counted
According to i.e. sensor signal is analyzed computing to signal.
Additionally, it is noted that in step 703 and step 704, processor can also process the 3rd data, will not locate
The first data transmission of reason is to digital processing unit.By the data of digital signal processor processes first.In step 703, it is also possible that
Processor processes the first data and the 3rd data, because the data volume of finger print data and the 3rd data is big, when the first data and the
When three data exceed the disposal ability of processor, the data that processor will exceed are denoted as the first subdata, transmit to data signal
Processor is processed.For example, a frame signal is 30ms, a frame signal Processing Algorithm program must be completed in 30ms, if place
The instruction cycle for managing device is 20ns, then the maximum operand that a frame time inner treater can be provided is 1,500,000 instructions, this
When, a frame time inner treater 1,600,000 instruction, then beyond the operand of processor, the data having more are then as the first son
Data are transferred to digital signal processor and carry out computing.
The chip controls method provided in present embodiment, processes the first data, and the 3rd data are passed by processor
Digital signal processor processes are transported to, the processing module of chip is processed different data by different processors,
The speed of chip processing data is accelerated, the stability of chip operation is enhanced, extends the use time of chip.
It is seen that, second embodiment is mutually corresponding with present embodiment, therefore present embodiment can be implemented with second
Mode is worked in coordination implementation.The relevant technical details mentioned in second embodiment in the present embodiment still effectively, the
The technique effect to be reached in two implementation methods in the present embodiment similarly it is achieved that in order to reduce repetition, here
Repeat no more.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in second embodiment.
Above the step of various methods divide, be intended merely to description it is clear, can be merged into when realizing a step or
Some steps are split, multiple steps are decomposed into, as long as comprising identical logical relation, all in the protection domain of this patent
It is interior；To adding inessential modification in algorithm or in flow or introducing inessential design, but its algorithm is not changed
With the core design of flow all in the protection domain of the patent.
It will be appreciated by those skilled in the art that all or part of step in realizing above-described embodiment method can be by
Program is completed to instruct the hardware of correlation, and the program storage is in a storage medium, including some instructions are used to so that one
Individual equipment (can be single-chip microcomputer, chip etc.) or processing module (processor) perform each embodiment methods described of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiment of the invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (17)
1. a kind of capacitance type fingerprint identification chip, it is characterised in that including：Induction arrays, the first analog-digital converter, the second modulus
Converter, data selector, AFE(analog front end) AFE and processing module；
The data selector connects with first analog-digital converter, second analog-digital converter and the processing module respectively
Connect；
The induction arrays, for gathering finger print data, and the finger print data are transmitted to first analog-digital converter；
First analog-digital converter, for carrying out analog-to-digital conversion to the finger print data, obtains the first data, and by described
One data transfer is to the data selector；
The AFE, for receiving the second data, and by second data transfer to second analog-digital converter；
Second analog-digital converter, for carrying out analog-to-digital conversion to second data, obtains the 3rd data, and by described
Three data transfers are to the data selector；
The data selector, for by first data and the 3rd data transfer to the processing module；
The processing module, for processing first data and the 3rd data.
2. capacitance type fingerprint identification chip according to claim 1, it is characterised in that the input of the AFE is sensing
Device connection end, for connecting sensor.
3. capacitance type fingerprint identification chip according to claim 2, it is characterised in that the quantity of the sensor connection end
More than 1, each described connection end connects a sensor.
4. capacitance type fingerprint identification chip according to claim 3, it is characterised in that the quantity of the sensor connection end
It is 6.
5. capacitance type fingerprint identification chip according to claim 1, it is characterised in that the processing module includes：Treatment
Device and digital signal processor, the processor and the data selector are connected.
6. capacitance type fingerprint identification chip according to claim 5, it is characterised in that
The processor, for processing first data, is additionally operable to the 3rd data transfer that will receive to the numeral
Signal processor；
The digital signal processor, for processing the 3rd data.
7. capacitance type fingerprint identification chip according to claim 5, it is characterised in that
The processor, for processing the 3rd data, is additionally operable to the first data transmission that will receive to the numeral
Signal processor；
The digital signal processor, for processing first data.
8. capacitance type fingerprint identification chip according to claim 5, it is characterised in that
The processor, for processing first data and the 3rd data；
When first data and the 3rd data exceed the disposal ability of the processor, by first data and institute
The first subdata in the 3rd data is stated to transmit to the digital signal processor；
The digital signal processor, for processing first subdata.
9. capacitance type fingerprint identification chip according to claim 1, it is characterised in that the chip also includes：Interface, institute
State interface to be connected with the processing module, for exporting the 4th data and the 5th data；Wherein, the 4th data are by described
Processing module treatment first data are obtained, and the 5th data process the 3rd data and obtain by the processing module
Arrive.
10. capacitance type fingerprint identification chip according to claim 9, it is characterised in that the interface is that two-wire system is serial
Interface I2C or four-wire system serial line interface SPI.
11. capacitance type fingerprint identification chips according to claim 9, it is characterised in that the interface is included：SPI and I2C；
The SPI, for exporting the 4th data；
The I2C, for exporting the 5th data.
A kind of 12. mobile terminals, it is characterised in that the electricity comprising sensor and as described in any one in claim 1 to 11
Appearance formula fingerprint recognition chip；
The sensor and the AFE(analog front end) AFE are connected, and second data are the data from the sensor.
13. mobile terminals according to claim 12, it is characterised in that the sensor is one below or its any group
Close：
Key sensor, pressure sensor or proximity transducer.
A kind of 14. chip controls methods, it is characterised in that be applied to the condenser type described in any one in claim 1 to 11
Fingerprint recognition chip；The chip controls method, including：
Whether detection induction arrays receive finger print data；
After the finger print data is received, data selector is by first data and the 3rd data transfer to processing mould
Block.
15. chip controls methods according to claim 14, it is characterised in that the processing module includes：Processor and
Digital signal processor, the processor and the data selector are connected；
After the step of data selector is by first data and the 3rd data transfer to the processing module, including：
The processor processes first data, and the 3rd data transfer that will be received is to the Digital Signal Processing
Device；
3rd data described in the digital signal processor processes.
16. chip controls methods according to claim 14, it is characterised in that the processing module includes：Processor and
Digital signal processor, the processor and the data selector are connected；
After the step of data selector is by first data and the 3rd data transfer to the processing module, including：
The processor processes the 3rd data, and the first data transmission that will be received is to the Digital Signal Processing
Device；
First data described in the digital signal processor processes.
17. chip controls methods according to claim 14, it is characterised in that the processing module includes：Processor and
Digital signal processor, the processor and the data selector are connected；
After the step of data selector is by first data and the 3rd data transfer to the processing module, including：
The processor processes first data and the 3rd data；
When first data and the 3rd data exceed the disposal ability of the processor, by first data and institute
The first subdata in the 3rd data is stated to transmit to the digital signal processor；
First subdata described in the digital signal processor processes.
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Application publication date: 20170609 |