TWI691901B - Touch chip capable of saving internal ports and configuration parameter transmission method - Google Patents

Abstract

A touch chip capable of saving the number of internal ports and a configuration parameter transmission method thereof, the method uses a first shift chain module to control a configuration parameter according to a shift clock signal to perform a first shift element operation, and A first XOR value generating unit performs an XOR operation on the first output data of the first shift chain module to generate a first XOR value; then, according to the shift through a second shift chain module The control of the bit clock signal receives the second output data of the first shift chain module and performs a second shift operation on the second output data, and a second XOR value generating unit is used for the second output The output data of the shift chain module performs an XOR operation to generate the second XOR value; finally, the XOR value comparison unit generates the second XOR value according to the first XOR value and the second XOR value A comparison result is used to decide whether to start a touch scanning process, thereby saving circuit logic area and reducing the number of ports between the analog circuit unit and the digital circuit unit.

Description

Touch chip capable of saving internal ports and configuration parameter transmission method

The invention relates to a touch chip architecture, in particular to a touch chip architecture which can save the number of internal ports.

Today's technology is changing with each passing day, and touch screens have been widely used in electronic devices to replace traditional screens for users to perform various touch operations. Generally speaking, the control circuit of the touch screen includes a digital circuit unit and an analog circuit unit, and during the touch scanning process, the digital circuit unit must configure and correct the circuit parameters of the analog circuit unit.

In addition, there are two specific implementation methods of the existing control circuit: the first is to configure a parameter register in the digital circuit unit, and then connect the parameter register to the analog circuit unit. However, this method will cause a large number of interfaces between the digital circuit unit and the analog circuit unit, resulting in difficulty in chip integration and connection error-prone; the second is to use a custom bus to connect the digital circuit unit and the analog Circuit unit, however, this method requires defining the bus behavior in the digital circuit unit, and then decoding the bus operation in the analog circuit unit, which will not only lead to greatly increased circuit complexity, but also increase the chip area.

In order to solve the above problems, there is an urgent need in the art for a touch chip that is simple in logic, saves the logic area of the circuit, and can effectively reduce the number of ports between the analog circuit unit and the digital circuit unit.

An object of the present invention is to disclose a touch chip capable of saving the number of internal ports, which has a digital circuit unit and an analog circuit unit, the digital circuit unit is used to store at least one of a random access memory The configuration parameters are transmitted to the analog circuit unit to determine a touch scanning procedure of a touch screen, which is characterized by:

The digital circuit unit has a first shift chain module, a shift control unit, a first XOR value generating unit and an XOR value comparing unit, wherein the shift control unit is used to generate a shift A clock signal and a shift enable signal, the first shift chain module performs a first shift operation on the at least one configuration parameter stored in the random access memory according to the control of the shift clock signal The first XOR value generating unit is used to perform an XOR operation on a first output data of the first shift chain module to generate a first XOR value, and the XOR value comparing unit is used Generating a comparison result according to the first XOR value and a second XOR value; the analog circuit unit has a second shift chain module, a shift sampling unit, a second XOR value generating unit and a Parameter configuration unit, wherein the shift sampling unit is used to drive the second shift chain module and extract the second shift chain module according to the control of the shift clock signal and the shift enable signal A third output data, the second shift chain module receives a second output data of the first shift chain module under the control of the shift clock signal and performs a second shift on the second output data Bit operation, the second XOR value generating unit is used to perform an XOR operation on the third output data of the second shift chain module to generate the second XOR value, and the parameter configuration unit It is used to determine the touch scanning procedure of the touch screen according to the parameter configuration data provided by the shift sampling unit.

In an embodiment, the XOR value comparison unit compares the first XOR value with the second XOR value to generate the comparison result, if the first XOR value is consistent with the second XOR value, Then the touch scanning process starts.

In one embodiment, the digital circuit unit is connected to a processor. When the XOR value comparison unit compares the first XOR value with the second XOR value, if the comparison result is the first XOR If the OR value is not consistent with the second XOR value, a retransmission process is performed and an interrupt result is uploaded to the processor.

In order to achieve the above object, the present invention further provides a method for transmitting configuration parameters that can save the number of internal ports of the touch chip, which is realized by using the touch chip described above, and includes: writing the at least one before the start of touch scanning Configure parameters to the random access memory; use the shift control unit to generate the shift clock signal and the shift enable signal; use the first shift chain module to control the randomness according to the shift clock signal Accessing the at least one configuration parameter stored in the memory to perform the first shift operation; when the first shift operation is completed, using the first XOR value generating unit to the first shift chain module Performing the XOR operation on the first output data to generate the first XOR value; using the shift sampling unit to drive the second shift chain module according to the control of the shift clock signal and the shift enable signal And retrieve the third output data of the second shift chain module; use the second shift chain module to receive the second output data of the first shift chain module under the control of the shift clock signal And perform the second shift operation on the second output data; when the second shift operation is completed, use the second XOR value generation unit to perform the third output data on the second shift chain module XOR operation to generate the second XOR value; use the XOR value comparison unit to generate the comparison result according to the first XOR value and the second XOR value; and when the comparison result is the first XOR value When the OR value is consistent with the second XOR value, the touch scanning process starts.

In an embodiment, if the comparison result compares that the first XOR value and the second XOR value are inconsistent, a retransmission process is performed and an interrupt result is uploaded to a processor.

In one embodiment, after starting the touch scanning procedure, the parameter configuration unit determines whether the touch scanning procedure has completed the full screen of the touch screen according to the parameter configuration data PAR provided by the shift sampling unit If the scan is not completed, the first shift chain module performs the first shift operation on the at least one of the configuration parameters stored in the random access memory according to the control of the shift clock signal, However, if the full-screen scanning has been completed, the touch scanning procedure is directly ended.

In order to enable your review committee to further understand the structure, features and purpose of the present invention, the drawings and detailed description of the preferred embodiments are attached as follows.

Please refer to FIG. 1, which illustrates a block diagram of an embodiment of a connection system of a digital circuit unit and an analog circuit unit of the present invention. As shown in the figure, the connection system of the digital circuit unit 10 and the analog circuit unit 20 of the touch chip of the present invention includes: a digital circuit unit 10 and an analog circuit unit 20, the digital circuit unit 10 and the analog circuit unit 20 They are all set in the touch chip and connected to each other, and the digital circuit unit 10 is used to transmit at least one configuration parameter 111 stored in a random access memory 11 to the analog circuit unit to determine one of the touch screens Touch scanning process, wherein the digital circuit unit 10 has a first shift chain module 12, a shift control unit 13, a first XOR value generating unit 14 and a XOR value comparing unit 15, the shift The bit control unit 13 generates a shift clock signal CLK and a shift enable signal EN after reading the data signal D _{IN of} the random access memory 11 through a control signal RD to obtain the configuration parameter 111 . After the shift clock signal CLK and the shift enable signal EN are generated, the first shift chain module 12 will control at least A first shift operation is performed on the configuration parameter 111, wherein the configuration parameter 111 can be adjusted according to user needs. In addition, when the first shift chain module 12 performs a first shift operation on at least one configuration parameter 111, a first output data D _out1 is generated, and the first XOR value generating unit 14 responds to the first The output data D _out1 performs an XOR operation to generate a first XOR value XOR1.

In addition, the analog circuit unit 20 has a second shift chain module 21, a shift sampling unit 22, a second XOR value generating unit 23 and a parameter configuration unit 24, wherein the shift sampling unit 22 will The second shift chain module 21 is driven according to the control of the shift clock signal CLK and the shift enable signal EN, and a third output data D _{out3 of} the second shift chain is _retrieved . When the second shift chain module 21 is controlled and driven by the shift sampling unit 22, the second shift chain module receives the first shift chain module 12 according to the control of the shift clock signal CLK A second output data D _out2 , and perform a second shift operation on the second output data D _out2 , and when the second shift operation is performed, the second shift chain module 21 generates the third The output data D _{out3 is generated} , and the second XOR value generating unit 23 performs an XOR operation on the third output data D _out3 to generate a second XOR value XOR2.

Thus, when both the first XOR value XOR1 and the second XOR value XOR2 are generated, the XOR value comparison unit 15 in the digital circuit unit 10 compares the first XOR value XOR1 with the second XOR2 to generate a comparison result CMP, wherein, if the comparison result CMP is that the first XOR value XOR1 is consistent with the second XOR value XOR2, the touch scanning process is started, but If the comparison result CMP is that the first XOR value XOR1 is not consistent with the second XOR value XOR2, a retransmission process is performed, and an interrupt result INT is uploaded to a processor.

Please refer to FIG. 2 and FIG. 3 together, which are flowcharts illustrating two embodiments of the connection method of the digital circuit unit and the analog circuit unit of the present invention. As shown in FIG. 2-3, before the start of the touch scanning process, the configuration parameters of the analog circuit unit 20 are written into the random access memory 11 (S01), and then the randomness is read through the shift control unit 13 Access at least one of the configuration parameters 111 in the memory 11 to generate a shift clock signal CLK and a shift enable signal EN (S02); the first shift chain module 12 controls at least one of the shift clock signal CLK The configuration parameter 111 performs a first shift operation (S03). When the first shift operation is completed, the first shift chain module 12 generates the first output data D _out1 ; the first XOR value generating unit 14 performs the first The first output data D _{out1 of the} shift chain module 12 performs an XOR operation to generate a first XOR value XOR1 (S04); the shift sampling unit 22 is driven according to the control of the shift clock signal CLK and the shift enable signal EN The second shift chain module 21 receives the second output data D _out2 of the first shift chain module 12 under the control of the shift clock signal CLK and performs the second output data D _out2 Second shift operation (S05); when the second shift operation is completed, the second shift chain module 21 will generate third output data D _out3 , and the shift sampling unit 22 will capture the second shift chain module 21 the third output data D _out3 , the second XOR value generating unit 23 performs an XOR operation on the third output data D _{out3 of the} second shift chain module 21 to generate a second XOR value XOR2 (S06); The XOR value comparison unit 15 generates a comparison result CMP according to the first XOR value XOR1 and the second XOR value XOR2 (S07).

As such, when the comparison result CMP is that the first XOR value XOR1 and the second XOR value are consistent, the touch scanning process (S08) is started, but if the comparison result CMP is the first XOR value XOR1 and If the second XOR value XOR2 is inconsistent, a retransmission process is performed, and an interrupt result is uploaded to the processor (S09).

After the touch scanning process starts, the parameter configuration unit 24 determines whether the touch scanning process has completed the full screen of the touch screen according to a parameter configuration data PAR provided by the shift sampling unit 22 If the scan is not completed, the first shift chain module 12 performs the first shift on the at least one configuration parameter 111 stored in the random access memory 11 according to the control of the shift clock signal CLK Bit operation, but if the full screen scanning has been completed, the touch scanning procedure is directly ended.

Therefore, with the design disclosed above, the present invention has the following advantages:

1. In the present invention, a shift element control unit can be provided on both the digital circuit unit and the analog circuit unit to greatly reduce the number of interface ports between the analog circuit unit and the digital circuit unit.

2. The invention can reduce the logic area of the circuit.

The case disclosed in this case is a preferred embodiment, and any part of the modification or modification that originates from the technical idea of this case and can be easily inferred by those skilled in the art, does not deviate from the patent scope of this case.

In summary, regardless of the purpose, means and efficacy, this case is showing that it is very different from the conventional technology, and its first invention is in practical use, and it is also in compliance with the patent requirements of the invention. Granted patents, in order to benefit the society and feel virtuous.

10 Digital circuit unit 11 Random-access memory 111 Configuration parameters 12 First shift chain module 13 Shift control unit 14 Second shift unit Comparison unit 20 Different or more units 20 Different or more units 20 Different or more units Module 22 Shift sampling unit 23 Second XOR value generation unit 24 Parameter configuration unit S01 Before the start of touch scanning, write the configuration parameters of the analog circuit unit to the random access memory S02 read through the shift control unit Taking at least one of the configuration parameters in the random access memory to generate the shift clock signal and the shift enable signal S03 The first shift chain module controls the random access memory according to the control of the shift clock signal At least one of the configuration parameters stored in the body performs the first shift operation S04. The first XOR value generating unit performs the XOR operation on the first output data of the first shift chain module to generate the first An XOR value S05 uses the second shift chain module to receive the second output data of the first shift chain module under the control of the shift clock signal and perform the second shift operation on the second output data S06 Use the second XOR value generating unit to perform the XOR operation on the third output data of the second shift chain module to generate the second XOR value S07 Use the XOR value comparing unit to The first XOR value and the second XOR value generate the comparison result S08. When the comparison result is that the first XOR value is consistent with the second XOR value, the touch scanning process S09 is started. If the comparison result is that the first XOR value is inconsistent with the second XOR value, a retransmission process is performed and an interrupt result is uploaded to the processor

FIG. 1 is a block diagram of an embodiment of a connection system of a digital circuit unit and an analog circuit unit of the present invention. FIG. 2 is a flowchart of an embodiment of a method for connecting a digital circuit unit and an analog circuit unit of the present invention. FIG. 3 is a flowchart of another embodiment of a method for connecting a digital circuit unit and an analog circuit unit of the present invention.

10 Digital circuit unit 11 Random-access memory 111 Configuration parameters 12 First shift chain module 13 Shift control unit 14 Second shift unit 20 shift unit Comparison or difference unit 20 Difference or comparison unit Module 22 Shift sampling unit 23 Second XOR value generation unit 24 Parameter configuration unit

Claims (6)

A touch chip capable of saving the number of internal ports has a digital circuit unit and an analog circuit unit, and the digital circuit unit is used to transmit at least one configuration parameter stored in a random access memory to the analog circuit The unit determines one touch scanning procedure of a touch screen, characterized in that the digital circuit unit has a first shift chain module, a shift control unit, a first XOR value generating unit and an XOR Value comparison unit, wherein the shift control unit is used to generate a shift clock signal and a shift enable signal, and the first shift chain module controls the random access according to the control of the shift clock signal The at least one configuration parameter stored in the memory performs a first shift operation, and the first XOR value generating unit is used to perform an XOR operation on the first output data of the first shift chain module To generate a first XOR value, and the XOR value comparison unit is used to generate a comparison result according to the first XOR value and a second XOR value; the analog circuit unit has a second shift chain mode Group, a shift sampling unit, a second XOR value generating unit and a parameter configuration unit, wherein the shift sampling unit is used to drive the first according to the control of the shift clock signal and the shift enable signal Two shift chain modules and retrieve a third output data of the second shift chain module, the second shift chain module receives the first shift chain module under the control of the shift clock signal A second output data and perform a second shift operation on the second output data, the second XOR value generating unit is used to perform an XOR on the third output data of the second shift chain module OR operation to generate the second XOR value, and the parameter configuration unit is used to determine the touch scanning procedure of the touch screen according to the parameter configuration data provided by the shift sampling unit; wherein, the The XOR value comparison unit compares the first XOR value with the second XOR value to generate the comparison result, and if the first XOR value is consistent with the second XOR value, the touch is started Scanner. The touch chip as described in item 1 of the patent application scope, wherein the digital circuit unit is connected to a processor, when the XOR value comparison unit compares the first XOR value with the second XOR value If the comparison result is that the first XOR value is inconsistent with the second XOR value, a retransmission process is performed and an interrupt result is uploaded to the processor. A configuration parameter transmission method capable of saving the number of internal ports of the touch chip, which is advantageous Implemented with the touch chip according to any one of claims 1 to 2, including: writing the at least one configuration parameter to the random access memory; generating the shift by using the shift control unit A clock signal and the shift enable signal; using the first shift chain module to perform the first shift operation on the at least one configuration parameter stored in the random access memory under the control of the shift clock signal When the first shift operation is completed, the first XOR value generating unit is used to perform the XOR operation on the first output data of the first shift chain module to generate the first XOR value; The shift sampling unit drives the second shift chain module according to the control of the shift clock signal and the shift enable signal; the second shift chain module receives the first shift chain module under the control of the shift clock signal The second output data of a shift chain module and perform the second shift operation on the second output data; when the second shift operation is completed, the shift sampling unit retrieves the second shift chain module The third output data of the group, and the second XOR value generating unit performs the XOR operation on the third output data of the second shift chain module to generate the second XOR value; use the The XOR value comparison unit generates the comparison result according to the first XOR value and the second XOR value; and when the comparison result is that the first XOR value is consistent with the second XOR value, The touch scanning procedure is described. As described in Item 3 of the patent application scope, a method for transmitting configuration parameters that can save the number of internal ports of the touch chip, wherein if the comparison result is that the first XOR value is inconsistent with the second XOR value, A retransmission process, and upload an interrupt result to a processor. A touch chip capable of saving the number of internal ports has a digital circuit unit and an analog circuit unit, and the digital circuit unit is used to transmit at least one configuration parameter stored in a random access memory to the analog circuit The unit determines a touch scanning procedure for a touch screen, characterized in that the digital circuit unit transmits the at least one configuration parameter to the analog circuit unit in a shift chain manner, and the digital circuit unit passes a XOR value comparison operation confirms whether the analog circuit unit is positive The at least one configuration parameter is indeed received, wherein the digital circuit unit has a first shift chain module, a shift control unit, a first XOR value generation unit and a XOR value comparison unit; the shift After reading the at least one configuration parameter from the random access memory, the bit control unit generates a shift clock signal and a shift enable signal to drive the first shift chain module to switch the at least one A configuration parameter is transmitted to the analog circuit unit; the first XOR value generation unit performs an XOR operation on the data of the at least one configuration parameter to generate a first XOR value; and the XOR value comparison unit compares A comparison result is generated between the first XOR value and a second XOR value from the analog circuit unit, and when the comparison result matches, the touch scanning process is started. A configuration parameter transmission method that can save the number of internal ports of the touch chip, wherein the touch chip has a digital circuit unit and an analog circuit unit, the method includes storing at least one configuration parameter stored in a random access memory from The digital circuit unit is transmitted to the analog circuit unit to determine a touch scanning procedure of a touch screen, and the method is characterized in that the digital circuit unit transmits the at least one configuration parameter to the shift chain The analog circuit unit, and the digital circuit unit confirms whether the analog circuit unit has correctly received the at least one configuration parameter through an XOR value comparison operation, wherein the digital circuit unit has a first shift chain module, A shift control unit, a first XOR value generating unit and a XOR value comparing unit; the shift element control unit will generate a shift after reading the at least one configuration parameter from the random access memory A bit clock signal and a shift enable signal to drive the first shift chain module to transmit the at least one configuration parameter to the analog circuit unit; the first XOR value generating unit performs the at least one configuration parameter An XOR operation is performed to generate a first XOR value; and the XOR value comparison unit compares the first XOR value with a second XOR value from the analog circuit unit to generate a comparison result, When the comparison result is consistent, the touch scanning process is started.

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