CN105653105A - Touch control chip and data acquisition method thereof - Google Patents
Touch control chip and data acquisition method thereof Download PDFInfo
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- CN105653105A CN105653105A CN201410648285.XA CN201410648285A CN105653105A CN 105653105 A CN105653105 A CN 105653105A CN 201410648285 A CN201410648285 A CN 201410648285A CN 105653105 A CN105653105 A CN 105653105A
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Abstract
The invention provides a touch control chip and a data acquisition method thereof. The touch control chip includes: N induction pins for receiving an induction signal on a touch control screen; M analog detection channels which are coupled to M induction pin selection switches in a one-to-one corresponding manner, wherein each induction pin selection switch is selectively coupled to one or more induction pins and is used for selecting one induction pin to establish a connection with the corresponding analog detection channel during a clock period, and 1<=M<N; an ADC unit which is coupled to the M analog detection channels and is used for converting the induction signal received by the M analog detection channels into a digital signal; and a data storage device which is coupled to the ADC unit, includes storage units which are corresponding to the N induction pins one to one, and is used for storing the digital signal converted and generated by the ADC unit. According to the touch control chip and the data acquisition method, the total area of the touch control chip can be effectively reduced, and the production cost of the touch control chip can be reduced.
Description
Technical field
The present invention relates to touch chip field, particularly relate to a kind of touch chip and collecting method thereof.
Background technology
In consumer system level chip (SOC) market more and more fierce now, chip cost has become one of key factor of decision product success or failure. Capacitive touch control techniques is owing to can well support the advantages such as the resistance to loss of multiple point touching, Touch Screen, long service life, and is developed rapidly, and its product is used widely.
Touch chip is as the bridge of user and mobile phone interaction, it is necessary to accurately obtain the coordinate position that user clicks screen. In prior art, induction signal is received by the induction pin in touch chip, the induction signal input simulation detection channel that will receive, induction signal is converted to numerary signal through analog to digital conversion (ADC) unit, and in the storage unit that to be saved in the built-in data-carrier store of touch chip corresponding.
With reference to Fig. 1, give the structural representation of a kind of touch chip of the prior art. In Fig. 1, touch chip is provided with n induction pin S1��Sn, n simulation detection channel 1��n, ADC101, data-carrier store 102, wherein, ADC101 comprises n ADC unit ADC1��ADCn, data-carrier store 102 comprises n storage unit R1��Rn. Induction pin, simulation detection channel, ADC unit and storage unit one_to_one corresponding. By induction pin collection induction signal, by the simulation detection channel of correspondence, to responding to, signal amplifies, filtering process, by the ADC unit of correspondence, induction signal after treatment is carried out analog to digital conversion, and analog-to-digital result is stored in corresponding storage unit.
But, along with the increase of touch control device screen size, induction pin number corresponding to touch chip, simulation detection channel number and ADC unit also want corresponding increase, cause the touch chip total area also in continuous increase, thus raised touch chip manufacture cost.
Summary of the invention
The problem that the embodiment of the present invention solves reduces the touch chip total area, and that reduces touch chip manufactures cost.
For solving the problem, the embodiment of the present invention provides a kind of touch chip, comprising:
N number of induction pin, is suitable for the induction signal received on touch-screen;
M simulation detection channel, respond to pin system selector switch one_to_one corresponding with M to couple, each induction pin system selector switch and one or more induction pin can be selected to couple, and are suitable for selecting an induction pin to connect with corresponding simulation detection channel within a clock period, 1��M < N;
ADC unit, couples with described M simulation detection channel, is suitable for the induction signal by described M simulation detection channel receives and converts numerary signal to;
Data-carrier store, couples with described ADC unit, comprises and described N number of induction pin storage unit one to one, is suitable for storing the numerary signal of described ADC cell translation generation.
Optionally, the number of described ADC unit is M, and described M ADC unit and described M simulation detection channel one_to_one corresponding couple, and are suitable for the induction signal by M simulation detection channel receives and convert numerary signal respectively to.
Optionally, the number of described ADC unit is 1, and described ADC unit can be selected to couple by an ADC system selector switch and described M simulation detection channel; Described ADC system selector switch is suitable for selecting a simulation detection channel and described ADC unit to connect within a clock period.
Optionally, the number of described ADC unit is X, 1 < X < M, and described X ADC unit and X ADC system selector switch one_to_one corresponding; Each ADC system selector switch and one or more simulation detection channel can be selected to couple, and are suitable for selecting a simulation detection channel to connect with corresponding ADC unit within a clock period.
Optionally, described M simulation detection channel is suitable for obtaining the induction signal of corresponding induction pin, and described induction signal is amplified, filtering process.
For solving the problem, the embodiment of the present invention additionally provides a kind of touch chip collecting method, and described touch chip is any one touch chip above-mentioned, comprising:
Successively corresponding ADC unit, simulation detection channel and induction pin are connected according to default induction pin scanning sequency, obtain the induction signal of corresponding induction pin;
By described ADC unit, the induction signal got is carried out analog to digital conversion, generate corresponding numerary signal;
By data-carrier store, described numerary signal is stored in the storage unit corresponding with described induction pin.
Optionally, described by described ADC unit the induction signal got carried out analog to digital conversion before, also comprise: by the simulation detection channel of correspondence, described induction signal is amplified, filtering process, and induction signal after treatment is sent to described ADC unit.
Optionally, when described simulation detection channel can be selected to couple by induction pin system selector switch and multiple induction pin, also comprise: receive the induction signal of an induction pin in described simulation detection channel after, according to default induction pin scanning sequency, control described induction pin system selector switch and the induction pin of the next pending scanning of correspondence and simulation detection channel are connected.
Compared with prior art, the technical scheme of the embodiment of the present invention has the following advantages:
M simulation detection channel exists respectively responds to pin system selector switch one to one, and each induction pin system selector switch and one or more induction pin can be selected to couple. Within a clock period, one of them induction pin system selector switch selects an induction pin to connect with corresponding simulation detection channel, thus realizes simulating, by M, the induction signal that detection channel obtains N number of induction pin.Owing to M is less than N, therefore need to adopt N number of simulation detection channel compared to N number of induction pin of existing touch chip, decrease the quantity of simulation detection channel, such that it is able to reduce the area of touch chip, reduce production cost.
Further, by adopting ADC system selector switch, the corresponding one or more simulation detection channel of each ADC system selector switch, a simulation detection channel is selected to connect with corresponding ADC unit within a clock period, while realizing ADC unit detection channel couple with simulation, decrease the quantity of ADC unit, further reduce the area of touch chip, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing touch chip;
Fig. 2 is the structural representation of a kind of touch chip in the embodiment of the present invention;
Fig. 3 is the structural representation of another kind of touch chip in the embodiment of the present invention;
Fig. 4 is the structural representation of the touch chip of another in the embodiment of the present invention;
Fig. 5 is the structural representation of the touch chip of another in the embodiment of the present invention;
Fig. 6 is a kind of touch chip collecting method schema in the embodiment of the present invention.
Embodiment
In prior art, corresponding to each induction pin of touch chip, it is provided with corresponding simulation detection channel and ADC unit. But, along with the increase of touch control device screen size, induction pin number corresponding to touch chip, simulation detection channel number and ADC unit also want corresponding increase, cause the touch chip total area also in continuous increase, thus raised touch chip manufacture cost.
In the embodiment of the present invention, M simulation detection channel exists respectively responds to pin system selector switch one to one, and each induction pin system selector switch can be selected to be connected with one or more induction pin. Within a clock period, one of them induction pin system selector switch selects an induction pin to connect with corresponding simulation detection channel, thus realizes simulating, by M, the induction signal that detection channel obtains N number of induction pin. Owing to M is less than N, therefore need to adopt N number of simulation detection channel compared to N number of induction pin of existing touch chip, decrease the quantity of simulation detection channel, such that it is able to reduce the area of touch chip, reduce production cost.
For enabling above-mentioned purpose, the feature and advantage of the embodiment of the present invention more become apparent, below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
Embodiments provide a kind of touch chip, with reference to Fig. 2, comprising: N number of induction pin, M simulate detection channel, ADC unit 201 and data-carrier store 202, wherein:
N number of induction pin, is followed successively by S1��S2������SN, be suitable for receiving the induction signal of each position units capacitance change on touch-screen.
M simulation detection channel, is followed successively by simulation detection channel 1��M, responds to pin system selector switch one_to_one corresponding with M and couples, and M induction pin system selector switch is followed successively by A1��AM. Wherein, each induction pin system selector switch can be able to be selected to couple with one or more induction pin, selects one of them induction pin to connect with corresponding simulation detection channel, 1��M < N within a clock period.
With reference to Fig. 2, induction pin system selector switch A1Can with induction pin S1, induction pin SaAnd other induction pin (not shown)s can select to couple, induction pin system selector switch A2Can with induction pin Sb��ScAnd other induction pin (not shown)s can select to couple, induction pin system selector switch AMCan with induction pin Sd��SNAnd other induction pin (not shown)s can select to couple.
Below to respond to pin system selector switch A1For example, the working process of induction pin system selector switch is described: as induction pin system selector switch A1With induction pin S1When coupling, simulation detection channel 1 and induction pin S1Connect, such that it is able to obtain induction pin S1On signal; Correspondingly, A is worked as1With induction pin SaWhen coupling, simulation detection channel 1 and induction pin SaConnect, such that it is able to obtain induction pin SaOn signal.
It should be appreciated that in concrete enforcement, induction pin system selector switch A1Can also only with induction pin S1, induction pin SaCan select to couple, it is also possible to only with induction pin S1Couple, or only with induction pin SaCouple, the connection scheme being not limited in Fig. 2. Correspondingly, pin system selector switch A is responded to2��AMOnly can respond to pin with one to couple, it is also possible to couple with two or more induction pin. The mode of connection of induction pin system selector switch with induction pin can be selected according to practical situation, as long as satisfaction answers the number M of pin system selector switch to be less than the number N of induction pin, repeat no more herein.
In an embodiment of the present invention, N number of induction pin being divided into M part, each induction pin system selector switch and N/M induction pin can be selected to couple. Such as, the induction pin number of touch chip is 100, respond to pin by 100 and it is divided into 50 parts, corresponding 2 the induction pins of each induction pin system selector switch, within a clock period, induction pin system selector switch selects one in 2 induction pins to connect with corresponding simulation detection channel.
ADC unit 201, couples with described M simulation detection channel, is suitable for the induction signal by described M simulation detection channel receives and converts numerary signal to.
In concrete enforcement, it is possible to select the number of ADC unit according to the application scene of reality. The number of ADC unit can be equal with the number of simulation detection channel, it is also possible to the number of simulation detection channel not etc. In embodiments of the present invention, the number of ADC unit is not more than the number of simulation detection channel. Such as, the number of ADC unit can equal M, and ADC unit with simulation detection channel one_to_one corresponding. The number of ADC unit can also equal 1, it is also possible to is be greater than 1 and be less than any integer value of M.
When the number of ADC unit is 1, when namely only there is an ADC unit, ADC unit can be able to be selected to couple by an ADC system selector switch and M simulation detection channel. Within a clock period, ADC system selector switch can select a simulation detection channel and ADC unit to connect, make ADC unit can obtain induction signal received in corresponding simulation detection channel, and convert the induction signal got to numerary signal.
To be X, X be number at ADC unit is greater than 1 and when being less than any integer value of M, and X ADC unit and X ADC system selector switch one_to_one corresponding, each ADC system selector switch can be able to be selected to couple with one or more simulation detection channel. Within a clock period, one of them ADC system selector switch can select a simulation detection channel to connect with corresponding ADC unit.
When the number of ADC unit is equal with simulation detection channel number, when namely the number of ADC unit is M, M ADC unit and M simulation detection channel one_to_one corresponding. Within a clock period, an ADC unit obtains simulates, with it, the induction signal received in detection channel one to one, and converts the induction signal got to numerary signal.
Data-carrier store 202, couples with described ADC unit, comprises N number of storage unit, be followed successively by R1��RN, be suitable for storing the numerary signal of described ADC cell translation generation.N number of storage unit can with N number of induction pin one_to_one corresponding, be suitable for storing the numerary signal corresponding to induction signal on corresponding induction pin. Such as, storage unit R1That store is induction pin S1On the numerary signal corresponding to induction signal, storage unit RNThat store is induction pin SNOn the numerary signal corresponding to induction signal.
It thus is seen that M simulation detection channel exists respectively responds to pin system selector switch one to one, each induction pin system selector switch and one or more induction pin can be selected to couple. Within a clock period, one of them induction pin system selector switch selects an induction pin to connect with corresponding simulation detection channel, thus realizes simulating, by M, the induction signal that detection channel obtains N number of induction pin. Owing to M is less than N, therefore need to adopt N number of simulation detection channel compared to N number of induction pin of existing touch chip, decrease the quantity of simulation detection channel, such that it is able to reduce the area of touch chip, reduce production cost.
Below the concrete structure of the touch chip provided in the embodiment of the present invention is illustrated.
With reference to Fig. 3, in an embodiment of the present invention, the induction pin number of touch chip is N=100, simulation detection channel number is M=50, induction pin system selector switch number be 50 and with simulation detection channel one_to_one corresponding, each induction pin system selector switch all with 2 induction pins can select to couple. Induction pin system selector switch A1With induction pin S1And induction pin S51Can select to couple, be suitable within a clock period, select induction pin S1Connect with simulation detection channel 1, or select induction pin S51Connect with simulation detection channel 1. Induction pin system selector switch A2With induction pin S2And induction pin S52Can select to couple, analogize with this, induction pin system selector switch A50With induction pin S50And induction pin S100Can select to couple.
Data-carrier store 202 comprises 100 data storage unit, is followed successively by R1��R100, the number of ADC unit 201 is 1, by ADC Unit selection switch B1Simulate detection channel with 50 can select to couple. Within a clock period, ADC Unit selection switch B1One of them simulation detection channel and ADC unit 201 is selected to connect so that ADC unit 201 can obtain the induction signal that corresponding simulation detection channel receives, and converts induction signal to numerary signal.
Such as, in present clock period, ADC system selector switch B1Selecting simulation detection channel 1 to connect with ADC unit 201, namely ADC unit 201 couples with simulation detection channel 1. Simulation detection channel 1 and induction pin S51Coupling, simulation detection channel 1 receives induction pin S51Induction signal, ADC unit 201 obtains the simulation induction pin S that receives of detection channel 151Induction signal, pin S will be responded to51Induction signal convert corresponding numerary signal to. The numerary signal obtained is sent to data-carrier store by ADC unit 201, is stored in and responds to pin S51Corresponding storage unit R51In.
With reference to Fig. 4, in one embodiment of the invention, the number of ADC unit 201 is 5, is followed successively by ADC1��ADC5. 5 ADC unit and 5 ADC system selector switch one_to_one corresponding, ADC1With ADC system selector switch C1Correspondence, ADC2(not shown) and ADC system selector switch C2(not shown) is corresponding, analogizes with this, ADC5With ADC system selector switch C5Corresponding. Each ADC system selector switch and 10 simulation detection channel can be selected to couple, wherein, and ADC system selector switch C1Can select to couple with simulation detection channel 1��10, ADC system selector switch C2Couple with simulation detection channel 11��20, analogize with this, ADC system selector switch C5Can select to couple with simulation detection channel 41��50.Data-carrier store 202 comprises 100 data storage unit, is followed successively by R1��R100��
ADC system selector switch is suitable within a clock period, selects in corresponding multiple simulation detection channel and ADC unit to connect. Such as, in present clock period, ADC system selector switch C1Connect with simulation detection channel 2. As simulation detection channel 2 and induction pin S2When coupling, ADC1Induction pin S can be obtained2Induction signal, and pin S will be responded to2Induction signal carry out analog to digital conversion, generate corresponding numerary signal.
With reference to Fig. 5, in an embodiment of the present invention, the number of ADC unit 201 is equal with simulation detection channel number, and namely the number of ADC unit is 50, is followed successively by ADC1��ADC50, and ADC unit with simulation detection channel one_to_one corresponding. In Fig. 5, simulation detection channel 1 and ADC1Couple, simulation detection channel 2 and ADC2Couple, analogize with this, simulation detection channel 50 and ADC50Couple. Data-carrier store 202 comprises 100 data storage unit, is followed successively by R1��R100��
Within a clock period, one of them ADC unit obtains the induction signal that corresponding simulation detection channel receives, and the induction signal got is carried out analog to digital conversion. Such as, in present clock period, ADC50Obtain the induction pin S of simulation received by detection channel 50100Induction signal, ADC50Pin S will be responded to100Induction signal convert corresponding numerary signal to, the storage unit R that to be sent in data-carrier store after numerary signal converts to binary data corresponding100��
As can be seen here, by adopting ADC system selector switch, the corresponding one or more simulation detection channel of each ADC system selector switch, a simulation detection channel is selected to connect with corresponding ADC unit within a clock period, while realizing ADC unit detection channel couple with simulation, decrease the quantity of ADC unit, further reduce the area of touch chip, reduce production cost.
Can finding by the above embodiment of the present invention, in embodiments of the present invention, although decreasing simulation detection channel number, but by simulation detection channel multiplexing, still can obtain the induction signal of all induction pins.
In other words, adopt the touch chip that the embodiment of the present invention provides, a simulation detection channel corresponding to each tactile control pin existing and ADC unit, owing to detection channel multiplexing will be simulated, each corresponding one or more induction pin of simulation detection channel, therefore can greatly reduce simulation detection channel number and ADC unit number, thus reduce the area of chip as seen, reduce the production cost of chip.
In the embodiment of the present invention, owing to obtaining the induction signal of induction pin successively by simulating the mode of detection channel multiplexing, the induction number of signals that the touch chip that therefore embodiment of the present invention provides collects within the identical time is less than existing chip. For guaranteeing that the quantity of induction signal collected within the identical time is equal with existing chip, therefore the embodiment of the present invention improves the frequency of modulated drive signal. And when modulated drive signal frequency increases, the modulated drive signal rate of decay increases, signal to noise ratio (SNR) is caused to lose, therefore, the embodiment of the present invention is while improving modulated drive signal frequency, it is to increase actuate signal voltage, modulated drive signal to be compensated.
Below by concrete steps, the flow process of the data gathering of the touch chip that the above embodiment of the present invention provides is described in detail.
Step S101, connects corresponding ADC unit, simulation detection channel and induction pin successively according to default induction pin scanning sequency, obtains the induction signal of corresponding induction pin.
In embodiments of the present invention, before the induction signal obtained on touch chip induction pin, the scanning sequency of induction pin can be set in advance, then successively all induction pins are scanned according to the scanning sequency of induction pin, such that it is able to obtain the induction signal of all induction pins. The scanning sequency of predetermined inductive pin can set according to practical situation. Such as, the induction pin number of touch chip is 100, then the scanning sequency responding to pin can be set as: S1��S2��S3������S99��S100, it is also possible to it is set as S100��S99������S2��S1, it is also possible to it is set as other scanning sequency, repeats no more herein.
After the scanning sequency getting default induction pin, can according to default scanning sequency, successively corresponding ADC unit, simulation detection channel, induction pin system selector switch and induction pin are connected, obtain the induction signal that corresponding induction pin collects.
Such as, with reference to Fig. 3, induction pin S1Corresponding simulation detection channel 1, induction pin S2Corresponding simulation detection channel 2, simulation detection channel 1 and simulation detection channel 2 all corresponding A DC system selector switch B1. Scanning sequency according to default induction pin, at present clock period scanning induction pin S1, at following clock cycle scanning induction pin S2. Then at present clock period, ADC system selector switch B1Simulation detection channel 1 is selected to connect with ADC unit, induction pin system selector switch A1Select induction pin S1ADC unit connects with simulation detection channel 1, so that can obtain induction pin S1Induction signal. At following clock cycle, ADC system selector switch B1Simulation detection channel 2 is selected to connect with ADC unit, induction pin system selector switch A2Select induction pin S2ADC unit connects with simulation detection channel 2, so that can obtain induction pin S2Induction signal.
And for example, with reference to Fig. 5, induction pin S1Corresponding simulation detection channel 1, simulation detection channel 1 and ADC1Couple; Induction pin S2Corresponding simulation detection channel 2, simulation detection channel 2 and ADC2Couple. Scanning sequency according to default induction pin, at present clock period scanning induction pin S1, at following clock cycle scanning induction pin S2. Then at present clock period, induction pin system selector switch A1Select induction pin S1Connect with simulation detection channel 1, so that ADC1Induction pin S can be obtained1Induction signal. At following clock cycle, induction pin system selector switch A2Select induction pin S2Connect with simulation detection channel 2, so that ADC2Induction pin S can be obtained2Induction signal.
In embodiments of the present invention, after the induction signal collecting corresponding induction pin according to scanning sequency, according to scanning sequency, described induction pin system selector switch can be controlled the induction pin of the next pending scanning of correspondence and simulation detection channel connected.
Such as, at present clock period, getting induction pin S1Induction signal after, induction pin system selector switch A1Can by induction pin S51Connect with simulation detection channel 1. Thus according to scanning sequency to induction pin S51When scanning, it is possible to directly to induction pin S51Scan, and do not need to wait induction pin system selector switch A again1Pin S will be responded to51Connect with simulation detection channel 1, complete once to scan the time used to all induction pins such that it is able to reduce.
Correspondingly, induction pin S is being got2Induction signal after, it is possible to by induction pin system selector switch A2Pin S will be responded to52Connect with simulation detection channel 2.Analogize with this, getting induction pin S50Induction signal after, it is possible to by induction pin system selector switch A50Pin S will be responded to100Connect with simulation detection channel 50.
Step S102, carries out analog to digital conversion by described ADC unit to the induction signal got, and generates corresponding numerary signal send to data-carrier store.
After collecting induction signal corresponding to induction pin, it is possible to by the simulation detection channel of correspondence, the induction signal collected is processed. Such as, it is possible to amplified by induction signal, filtering etc. processes. Treated induction signal is sent to corresponding ADC unit, by ADC unit, treated induction signal is carried out analog to digital conversion, generate corresponding numerary signal, and numerary signal is sent to data-carrier store.
Such as, simulate detection channel 1 and obtain induction pin S1Induction signal, induction signal is amplified, filtering process, and treated induction signal is sent to ADC1��ADC1Treated induction signal being carried out analog to digital conversion, generates corresponding numerary signal, be i.e. corresponding binary data, send is to data-carrier store.
Step S103, is stored to described numerary signal in the storage unit corresponding with described induction pin.
In embodiments of the present invention, when data-carrier store receives numerary signal, it is possible to the induction pin corresponding to numerary signal, numerary signal is stored in the storage unit in the data-carrier store corresponding with responding to pin.
Such as, the numerary signal currently got is by induction pin S1Induction signal via ADC1Conversion generates, the numerary signal namely currently got and induction pin S1Corresponding. According to default corresponding relation, induction pin S1With the storage unit R in data-carrier store1Correspondence, therefore can be stored into storage unit R by the numerary signal currently got1In.
The all or part of step that one of ordinary skill in the art will appreciate that in the various methods of above-described embodiment is that the hardware that can control to be correlated with by program completes, this program can be stored in a computer-readable recording medium, and storage media can comprise: ROM, RAM, disk or CD etc.
Although present disclosure is as above, but the present invention is not defined in this. Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (8)
1. a touch chip, it is characterised in that, comprising:
N number of induction pin, is suitable for the induction signal received on touch-screen;
M simulation detection channel, respond to pin system selector switch one_to_one corresponding with M to couple, each induction pin system selector switch and one or more induction pin can be selected to couple, and are suitable for selecting an induction pin to connect with corresponding simulation detection channel within a clock period, 1��M < N;
ADC unit, couples with described M simulation detection channel, is suitable for the induction signal by described M simulation detection channel receives and converts numerary signal to;
Data-carrier store, couples with described ADC unit, comprises and described N number of induction pin storage unit one to one, is suitable for storing the numerary signal of described ADC cell translation generation.
2. touch chip as claimed in claim 1, it is characterized in that, the number of described ADC unit is M, and described M ADC unit and described M simulation detection channel one_to_one corresponding couple, and are suitable for the induction signal by M simulation detection channel receives and convert numerary signal respectively to.
3. touch chip as claimed in claim 1, it is characterised in that, the number of described ADC unit is 1, and described ADC unit can be selected to couple by an ADC system selector switch and described M simulation detection channel; Described ADC system selector switch is suitable for selecting a simulation detection channel and described ADC unit to connect within a clock period.
4. touch chip as claimed in claim 1, it is characterised in that, the number of described ADC unit is X, 1 < X < M, described X ADC unit and X ADC system selector switch one_to_one corresponding; Each ADC system selector switch and one or more simulation detection channel can be selected to couple, and are suitable for selecting a simulation detection channel to connect with corresponding ADC unit within a clock period.
5. touch chip as described in item as arbitrary in claim 1-4, it is characterised in that, described M simulation detection channel is suitable for obtaining the induction signal of corresponding induction pin, and described induction signal is amplified, filtering process.
6. a touch chip collecting method, described touch chip is the touch chip described in the arbitrary item of claim 1-5, it is characterised in that, comprising:
Successively corresponding ADC unit, simulation detection channel and induction pin are connected according to default induction pin scanning sequency, obtain the induction signal of corresponding induction pin;
By described ADC unit, the induction signal got is carried out analog to digital conversion, generate corresponding numerary signal;
By data-carrier store, described numerary signal is stored in the storage unit corresponding with described induction pin.
7. touch chip collecting method as claimed in claim 6, it is characterized in that, described by described ADC unit the induction signal got carried out analog to digital conversion before, also comprise: by the simulation detection channel of correspondence, described induction signal is amplified, filtering process, and induction signal after treatment is sent to described ADC unit.
8. touch chip collecting method as claimed in claim 6, it is characterized in that, when described simulation detection channel can be selected to couple by induction pin system selector switch and multiple induction pin, also comprise: receive the induction signal of an induction pin in described simulation detection channel after, according to default induction pin scanning sequency, control described induction pin system selector switch and the induction pin of the next pending scanning of correspondence and simulation detection channel are connected.
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| WO2022036992A1 (en) * | 2020-08-17 | 2022-02-24 | 安徽鸿程光电有限公司 | Capacitive touch-control module and control method therefor, and related device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568958A (en) * | 2019-08-30 | 2019-12-13 | 国微集团(深圳)有限公司 | Method for scanning touch screen by using intelligent DMA (direct memory access) and touch chip |
| WO2022036992A1 (en) * | 2020-08-17 | 2022-02-24 | 安徽鸿程光电有限公司 | Capacitive touch-control module and control method therefor, and related device |
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