CN104866253A - Chip, method for chip to respond to imaging device, and imaging system - Google Patents
Chip, method for chip to respond to imaging device, and imaging system Download PDFInfo
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Abstract
The invention discloses a chip, a method for the chip to respond to an imaging device, and an imaging system, belongs to the technical field of printing and solves the technical problem that the security of information data transmitted between the chip and the imaging device is not high. The chip is provided with a control unit, a memory module and a digital-to-analog conversion module, wherein the memory module is used for storing information data interacting with the imaging device. The method for the chip to respond to the imaging device comprises the following steps: the control units receives a command from the imaging device; according to the content of the command, binary response data are transmitted to the digital-to-analog conversion module; the digital-to-analog conversion module converts at least part of the response data into analog signals according to the preset encryption rule; the response data, at least part of which are converted into the analog signals, are output to the imaging device through a bus.
Description
Technical field
The present invention relates to printing technique field, specifically, relate to method, the imaging system of a kind of chip and response imaging device thereof.
Background technology
Chip is generally fixed on imaging cartridge, and its effect controls imaging cartridge and imaging device coupling and provide image-forming information in follow-up imaging process.Record the image-forming information such as surplus data about the imaging cartridge information such as capability value of imaging cartridge model, consumptive material color data, imaging cartridge verify data consumptive material, consumptive material and the imaging date obtained in follow-up imaging process, consumptive material in imaging box chip, below by imaging cartridge information and image-forming information referred to as information data.These information datas are stored in the storer of chip in the form of a binary number, and with simple digital data transmission in the information interactive process of chip and imaging device, i.e. the form transmission of low and high level, wherein, high level represents 1, and low level represents 0.
But these information datas, as the significant data of recording user history of printing, store and actually in the chips only recognize machine to the identification of imaging device and have effect.Once the information in chip is read by other people, cause the leakage of users personal data, harm may be brought to user; In addition, these information datas directly store in the chips fixing storage area, once collected, just easily via distort or counterfeit chip to threaten the safety of imaging device and information.And existing imaging device many employings IC bus (Inter-Integrated Circuit, be called for short IIC), Serial Peripheral Interface (SPI) (Serial Peripheral Interface, be called for short SPI), communication protocol or the similar communication protocol such as unibus, or by regulating simulating signal to realize different level to communicate.The method of this low and high level transmission data makes the very easily collected analysis of Content of Communication, and simple digital signal communication is easily cracked, poor stability.
Therefore, need badly a kind of can the communication means of guarantee information data security, the data of imaging device and chip communication are not easily gathered or counterfeit, realize the perfection encryption of chip.
Summary of the invention
The object of the present invention is to provide method, the imaging system of a kind of chip and response imaging device thereof, to solve the not high technical matters of the information data security that transmits between chip and imaging device.
First aspect present invention provides a kind of method of die response imaging device, and chip has control module, memory module and D/A converter module, and described memory module stores the information data mutual with imaging device, and the method comprises:
Control module receives the instruction from imaging device;
According to the content of described instruction, send binary response data to described D/A converter module;
Described response data, according to the encryption rule preset, is converted to simulating signal by described D/A converter module at least partly;
The described response data being converted to simulating signal is at least partly exported to imaging device by bus.
Wherein, if described instruction is addressing instruction, the described content according to described instruction, sends binary response data to described D/A converter module, comprising:
Whether the slave addresses of relatively carrying in addressing instruction and the slave addresses of chip self match, if coupling, according to the rule of response preset, send binary response data to described D/A converter module.
Wherein, if described instruction is broadcasting instructions, the described content according to described instruction, sends binary response data to described D/A converter module, comprising:
According to the content of broadcasting instructions, extract binary information data of corresponding broadcasting instructions in described memory module and send to D/A converter module.
Wherein, on same bus, in the response data that the chip of different slave addresses is exported to imaging device by bus the voltage of simulating signal or frequency or time delay or amplitude or phase place different.
Wherein, if described instruction is information data reading command, the described content according to described instruction, sends binary response data to described D/A converter module, comprising:
According to the content of described information data reading command, extract binary information data corresponding with described information data reading command in described memory module and send to D/A converter module.
Wherein, in dissimilar chip, the voltage of the simulating signal that the information data of same type generates after described D/A converter module encryption or frequency or time delay or amplitude or phase place different; And/or in same chip, the voltage of the simulating signal that dissimilar information data generates after the encryption of described D/A converter module or frequency or time delay or amplitude or phase place different.
Wherein, the simulating signal that the information data of same type generates after described D/A converter module encryption represents corresponding binary number 0 and 1 respectively by different voltage or frequency.
In the technical scheme of the embodiment of the present invention, the invention provides a kind of method of die response imaging device, D/A converter module in chip is according to the encryption rule preset, by the binary responses data for responding imaging device be converted to simulating signal at least partly after pass to bus, for the non-original manufacturer of not knowing encryption rule, not easily gather and analyze, ensure that the safety of information data.
Second aspect present invention provides a kind of chip, chip is arranged on imaging cartridge, this chip comprises communication interface, the control module be electrically connected with described communication interface, the memory module that is electrically connected with described control module, described control module receives the instruction from imaging device by described communication interface, described memory module stores the information data mutual with imaging device, described chip also comprises D/A converter module, and described D/A converter module is provided with default encryption rule; Described control module is electrically connected with described D/A converter module, for the content according to described instruction, sends binary response data to described D/A converter module;
Described D/A converter module, is converted to simulating signal according to described encryption rule at least partly by the response data from control module, and exports the described response data being converted to simulating signal at least partly by described communication interface to imaging device.
Wherein, in dissimilar chip, the voltage of the simulating signal that the response data of same type generates after described D/A converter module encryption or frequency or time delay or amplitude or phase place different; And/or in same chip, the voltage of the simulating signal that dissimilar response data generates after the encryption of described D/A converter module or frequency or time delay or amplitude or phase place different.
Third aspect present invention provides a kind of imaging system, comprise imaging device, and the dismountable imaging cartridge be arranged on imaging device, described imaging cartridge is provided with chip, described chip comprises communication interface, control module and memory module, described control module receives the instruction from imaging device by described communication interface, described memory module stores the information data mutual with imaging device, described chip also comprises D/A converter module, and described D/A converter module is provided with default encryption rule; Described control module is electrically connected with described D/A converter module, for the content according to described instruction, sends binary response data to described D/A converter module;
Described D/A converter module, is converted to simulating signal according to described encryption rule by least part of information data of the response data from control module and is exported to imaging device by described communication interface;
Described imaging device is provided with identification module, and described identification module stores the deciphering rule corresponding with described encryption rule, for according to described deciphering rule, identifies the simulating signal in the response data received.
Wherein, described according to described deciphering rule, identify the simulating signal in the response data received, comprising:
Simulating signal in the response data received is converted to digital signal, and/or according to the type of response data that the voltage of the simulating signal in the response data received or the feature of frequency or time delay or amplitude or phase place identify the type of chip or the address of chip or receives.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, accompanying drawing required in describing is done simple introduction below to embodiment:
Fig. 1 is the structural representation of the chip in the embodiment of the present invention;
Fig. 2 is the structural representation of the print system in the embodiment of the present invention;
Fig. 3 is the signal waveforms one of the chip transmission in the embodiment of the present invention;
Fig. 4 is the signal waveforms two of the chip transmission in the embodiment of the present invention;
Fig. 5 is the signal waveforms three of the chip transmission in the embodiment of the present invention;
Fig. 6 is the process flow diagram of the method for die response imaging device in the embodiment of the present invention;
Fig. 7 is the process flow diagram of method of the imaging device response chip in the embodiment of the present invention;
Fig. 8 is the signal waveforms four of the chip transmission in the embodiment of the present invention;
Fig. 9 is the signal waveforms five of the chip transmission in the embodiment of the present invention;
Figure 10 is the signal waveforms six of the chip transmission in the embodiment of the present invention;
Figure 11 is the signal waveforms seven of the chip transmission in the embodiment of the present invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
The present invention relates generally to the numerical model analysis formula communication on imaging device and imaging cartridge between chip.Imaging device in the embodiment of the present invention can be the imaging devices such as printer, duplicating machine, facsimile recorder, all-in-one; Imaging cartridge both can be the print cartridge being installed to ink-jet printer, also can be the cartridge etc. being installed to laser printer.
As shown in Figure 1, the imaging box chip 10 that the present embodiment provides comprises communication interface 101 and electronic module 102, and communication interface 101 is connected with electronic module 102, for realizing the communication between electronic module 102 and imaging device.Wherein, electronic module 102 comprises control module 103, memory module 104 and D/A converter module 105.
Concrete, memory module 104, is set to store the information data mutual with imaging device; Control module 103, after being set to receive the instruction from imaging device, the content according to received instruction sends binary response data (i.e. digital signal) to described D/A converter module 105; D/A converter module 105 is set to the encryption rule according to presetting, being converted to the response data from control module 103 simulating signal at least partly and flowing to communication interface 101, then export to imaging device the response data that this is converted to simulating signal at least partly by bus by communication interface 101.
As shown in Figure 2, imaging device 20 is by bus and multiple chip 10a, 10b ... 10x contacts.Similar, imaging device 20 comprises communication interface 201 and identification module 202.In order to understand from the simulating signal in the information data of chip, identification module 202 is set to the next simulating signal of identification chip transmission and the simulating signal transmitted by chip parsing is reduced into binary digital signal.
Concrete, below by way of three specific embodiments, the communication means between chip 10 and imaging device 20 is described.
embodiment one: (principal and subordinate) call answering of chip and imaging device
Shown in Figure 2, multiple chip is connected with imaging device by same bus, and each chip in bus is had any different in the slave addresses of other chip, and imaging device 20 is equivalent to the main frame of these chips.In prior art, slave addresses stores in the chips with binary data mark, and imaging device 20 is by chip 10a, 10b of bus and multiple imaging cartridge ... 10x etc. carry out communication.Bus comprises power lead VCC, clock line CLK, ground wire GND and data line Data, each chip 10a, 10b ... 10x is all electrically connected with this bus, and receives power supply and signal.When imaging device 20 needs to access a certain chip, imaging device 20 passes through data line Data to chip 10a, 10b ... 10x sends addressing instruction (slave addresses of the chip namely will accessed by bus transfer), chip 10a, 10b ... the slave addresses of carrying in the addressing instruction received and respective slave addresses compare by 10x: if matching addresses, chip to bus feedback answer signal as 0 or 1, then continue receive and response bus on other instructions; If address is not mated, chip, without the need to bus feedback answer signal, does not respond addressing instruction.
And in the present embodiment, chip feeds back to imaging device to the answer signal of bus feedback with the simulated data of different wave.When a certain chip accessed by imaging device 20, imaging device 20 passes through data line Data to chip 10a, 10b ... 10x sends addressing instruction.Chip 10a, 10b ... the slave addresses of carrying in the addressing instruction received and the slave addresses of self compare by 10x, if matching addresses, chip is according to the rule of response preset, send binary response data to described D/A converter module, D/A converter module 105 according to preset encryption rule by this response data be converted to simulating signal at least partly after export to bus.Wherein, in the response data that exported to imaging device by bus of the chip of different slave addresses, the waveform of simulating signal is different.
Concrete can be that in the response data that different chip exports, the voltage of simulating signal is different.As shown in Figure 3, the voltage of the simulating signal that chip 10a exports to bus is V1, and the voltage of the simulating signal that chip 10b exports to bus is V2, and the voltage of the simulating signal that chip 10x exports to bus is V3.Simulating signal in imaging device 20 testbus, by analyzing the voltage of the simulating signal received from bus, just can judge whether the chip for access is responded, and response addressing instruction is chip in which slave addresses in other words.
Certainly, also can be that the frequency of simulating signal in the response data that exports of the chip of different slave addresses is different.As shown in Figure 4, the frequency of the simulating signal that chip 10a exports to bus is f1, and the frequency of the simulating signal that chip 10b exports to bus is f2, and the frequency of the simulating signal that chip 10x exports to bus is f3.Signal in imaging device 20 testbus, by analyzing the frequency of the simulating signal received from bus, just can judge whether the chip for access is responded, and response addressing instruction is the chip of which slave addresses in other words.
In addition, also can be that the time delay of simulating signal in the response data that exports of the chip of different slave addresses is different.As shown in Figure 5, the transformation period (i.e. time delay) of simulating signal from the first voltage to the second voltage that chip 10a exports to bus is t1, the simulating signal that chip 10b exports to bus from the first voltage to the transformation period of the second voltage simulating signal that to be t2, chip 10x export to bus from the first voltage to the transformation period of the second voltage be t3.Signal in imaging device 20 testbus, by analyzing the simulating signal that receives from bus from the first change in voltage to the second voltage time used, just can judge whether the chip of accessing is responded, what respond addressing instruction in other words is the chip of which slave addresses.
In addition, can also be in the response data that exports of the chip of different slave addresses the amplitude of simulating signal or phase place different.As long as the feature of multiple simulating signal can be distinguished, be all applicable to the embodiment of the present invention.
embodiment two: broadcasting instructions
In existing communications protocol, imaging device 20 adopts the mode of broadcasting instructions to send the instructions such as addressing, read-write, verification to the chip in bus usually, can transmit corresponding data successively after chip receives instruction to imaging device 20.Such as, imaging device 20 sends the broadcasting instructions reading black amount information to bus, chip 10a, 10b ... successively the ink amount information stored in chip can be sent to imaging device according to the order preset after 10x receives this broadcasting instructions.
And in the present embodiment, when imaging device 20 passes through data line Data to chip 10a, 10b ... when 10x sends broadcasting instructions, chip 10a, 10b ... 10x is according to the content of broadcasting instructions, and the binary information data extracting corresponding broadcasting instructions in memory module 104 sends to D/A converter module 105.The D/A converter module 105 of each chip according to the encryption rule preset by this response data be converted to simulating signal at least partly after, each chip according to the order preset, exports this simulating signal more successively.And the waveform of simulating signal is different in the response data of the chip transmission of different slave addresses on same bus.
Concrete can be that in the response signal that on same bus, the chip of different slave addresses exports, the voltage of simulating signal is different.As shown in Figure 3, the voltage of the simulating signal that chip 10a exports to bus is V1, and the voltage of the simulating signal that chip 10b exports to bus is V2, and the voltage of the simulating signal that chip 10x exports to bus is V3.Simulating signal in imaging device 20 testbus, by analyzing the voltage of the simulating signal received from bus, just can judge current simulating signal is from which chip in bus.
Certainly, also can be different slave addresses on same bus chip transmission response signal in the frequency of simulating signal different.As shown in Figure 4, the frequency of the simulating signal that chip 10a exports to bus is f1, and the frequency of the simulating signal that chip 10b exports to bus is f2, and the frequency of the simulating signal that chip 10x exports to bus is f3.Simulating signal in imaging device 20 testbus, by analyzing the frequency of the simulating signal received from bus, just can judge current simulating signal is from which chip in bus.
In addition, also can be that the time delay of simulating signal in the response data that exports of the chip of different slave addresses on same bus is different.As shown in Figure 5, the transformation period (i.e. time delay) of simulating signal from the first voltage to the second voltage that chip 10a exports to bus is t1, the simulating signal that chip 10b exports to bus from the first voltage to the transformation period of the second voltage simulating signal that to be t2, chip 10x export to bus from the first voltage to the transformation period of the second voltage be t3.Signal in imaging device 20 testbus, by analyzing the simulating signal that receives from bus from the first change in voltage to the second voltage time used, just can judge current simulating signal is from which chip in bus.
In addition, can also be in the response data that exports of the chip of different slave addresses the amplitude of simulating signal or phase place different.As long as the feature of multiple simulating signal can be distinguished, be all applicable to the embodiment of the present invention.
embodiment three: enciphered data
In prior art, in imaging operation, imaging device and the chip be arranged on imaging cartridge carry out information interaction, comprising: imaging device sends write instruction to imaging box chip, sends the information data produced in imaging process to imaging box chip; Imaging device sends information data reading command to imaging box chip, require that imaging box chip transfer information data is to imaging device, when imaging device does not receive the information data from imaging box chip, or when the information data received does not meet the requirement of imaging device, imaging device reports an error or refuses to perform imaging operation.
Such as, when returning to consumptive material quantity not sufficient in the consumptive material surplus information displaying imaging cartridge in the information data of imaging device when the chip on imaging cartridge, imaging device refusal performs imaging operation.From background technology above, the information data that this chip returns to imaging device is not limited to consumptive material surplus information, and can also be the out of Memory such as number of print pages or last time-write interval, these information likely can reveal user profile.
Therefore, the present embodiment proposes a kind of new technical scheme, namely when receiving the information data reading command from imaging device, chip is by the content according to this information data reading command, extract the binary information data corresponding with this information data reading command in memory module 104 and send to D/A converter module 105, D/A converter module 105 according to preset encryption rule in binary information data be converted to simulating signal at least partly after export to imaging device again, make chip return a kind of can by supporting imaging device identification but the simulating signal of not easily collected analysis to imaging device.In concrete can be dissimilar chip, the voltage of the simulating signal that the information data of same type generates after described D/A converter module encryption or frequency or time delay or amplitude or phase place different; Also can be in same chip, the voltage of the simulating signal that dissimilar information data generates after the encryption of described D/A converter module or frequency or time delay or amplitude or phase place different.Two kinds of situations can be present in the chip of same type simultaneously.
As shown in Figure 6, the workflow of information data reading command that said chip response imaging device transmits comprises the following steps:
S1, communication interface 101 receive the information data reading command from imaging device 20 by bus.
S2, control module 103, according to information data reading command, extract and have been stored in memory module 104, mutual with imaging device information data.
Extracted information data, according to the encryption rule preset, is converted to simulating signal by S3, D/A converter module 105 at least partly.
S4, communication interface 101 export to imaging device 20 information data that this is converted to simulating signal at least partly by bus.
It should be noted that, the partial bytes in a certain bar information data can be converted to simulating signal by D/A converter module 105, also in many information datas of transmission at least one can be needed to be converted to simulating signal by current.
As shown in Figure 7, above-mentioned imaging device proceeds as follows after receiving the information data that chip sends:
S5, communication interface 201 receive the information data from chip by bus.
Simulating signal in information data, according to the deciphering rule preset, is converted to digital signal by S6, identification module 202.
Then imaging device performs corresponding operation according to the information data be converted to, as stored information data or performing imaging operation etc.
Be provided with predetermined encryption rule in the D/A converter module 105 of chip, in the identification module 202 of imaging device, be provided with the deciphering rule corresponding with D/A converter module 105.
Specifically implement in scene at first of the present embodiment, the voltage of the simulating signal that information data dissimilar in same type chip generates after D/A converter module 105 is encrypted or frequency difference.As shown in Figure 8, represent in chip that the information data of ink amount changes the simulating signal of rear generation frequency by D/A converter module 105 represents with Fa, in chip, represent that the information data of model changes the simulating signal of rear generation frequency by D/A converter module 105 represents with Fb.When chip receives the request of reading ink amount information that imaging device sends and type information, the control module 103 of chip sends the ink amount information data " 1001 " stored in memory module 104 and type information data " 1100 " to D/A converter module 105.The information data encryption received is generated analog signal output as shown in Figure 8 in bus by D/A converter module 105.Owing to being provided with in the identification module 202 of imaging device 20 with D/A converter module 105 to corresponding deciphering rule, therefore be easy to control the frequency from collection signal bus, therefore after receiving the simulating signal in bus, identification module 202 starts the deciphering rule corresponding with D/A converter module 105, by the signal of a1, a2, a3, a4 point on frequency Fa data acquisition bus, by the signal of b1, b2, b3, b4 point on frequency Fb data acquisition bus, obtain amount information data " 1001 " out of ink and type information data " 1100 ".
First specifically implements in scene, and the different voltage of information data of the same type represents binary number 0 and 1 respectively.Specifically implement in scene at second of the present embodiment, except the voltage of the simulating signal generated after information data encryption dissimilar in the chip of same type or frequency difference, the different frequency of information data of the same type represents binary number 0 and 1 respectively.As shown in Figure 9, represent in chip that the information data of ink amount represents binary number 1 by the first frequency f1 after D/A converter module 105 conversion, second frequency f2 represents binary number 0; Represent in chip that the information data of model represents binary number 1 by the 3rd frequency f 3 after D/A converter module 105 conversion, the 4th frequency f 4 represents binary number 0.When chip receives the request of reading ink amount information that imaging device 20 sends and type information, the control module 103 of chip sends the ink amount information data " 1001 " stored in memory module 104 and type information data " 1100 " to D/A converter module 105, D/A converter module 105 by the information data encryption one-tenth that receives analog signal output as shown in Figure 9 in bus.After the communication interface 201 of imaging device receives the simulating signal in bus, identification module 202 starts the deciphering rule corresponding with D/A converter module 105, by the frequency of simulating signal that testbus is transmitted, analytical information data type and representative binary number, obtain amount information data " 1001 " out of ink and type information data " 1100 ".
Below specifically implement in scene, the frequency of the simulating signal exported after information data encryption dissimilar in the chip of same type is different, can certainly be that the voltage of the simulating signal exported after information data encryption dissimilar in the chip of same type is different.As shown in Figure 10, represent in chip that the information data of ink amount represents binary number 0 by the first voltage v1 after D/A converter module 105 conversion, second voltage v2 represents binary number 1, represent in chip that the information data of model represents binary number 0 by the tertiary voltage v3 after D/A converter module 105 conversion, the 4th voltage v4 represents binary number 1.When chip receives the request of reading ink amount information that imaging device 20 sends and type information, chip controls unit sends the ink amount information data " 1001 " stored in memory module 104 and type information data " 1100 " to D/A converter module 105, D/A converter module 105 by the information data encryption one-tenth analog signal output as shown in Figure 10 that receives in bus.After the communication interface 201 of imaging device receives the simulating signal in bus, identification module 202 starts the deciphering rule corresponding with D/A converter module 105, by the voltage of testbus analog signals, the type of analytical information data and representative binary number, obtain amount information data " 1001 " out of ink and type information data " 1100 ".Be more than represent binary number 0 and 1 respectively with different voltage in information data of the same type, can certainly be represent binary number 0 and 1 respectively by different frequencies in information data of the same type, do not repeat herein.
The form of above information data type and signal data, the form of expression of voltage and frequency is only and illustrates, also can be the form of expression of time delay or amplitude or phase place.As long as the feature of multiple simulating signal can be distinguished, be all applicable to the embodiment of the present invention.
As can be seen from Fig. 8,9 and 10, it is the different signal of frequency or voltage that information data after D/A converter module 105 is encrypted passes in bus, for the non-original manufacturer of not knowing encryption rule, not easily gather and analyze, ensure that the safety of information data.
In order to reduce development & production cost, can be set to only have in chip the information data of one or more types to need to encrypt rear and imaging device communication; If pursue the mode of highly encrypting, then can be set to all information datas in chip all need to be encrypted could with imaging device communication.
Specifically implement in scene at the 3rd of the present embodiment, in dissimilar chip same type information data encryption after the voltage of simulating signal that exports or frequency different.As shown in figure 11, different type information data are stored in the chip of different model, the signal waveform of the type information data " 1001 " stored in the memory module 104 of the chip of the first model after D/A converter module 105 is encrypted is as shown in the L1 in Figure 11, and the analog signal waveform of the type information data " 1100 " stored in the memory module 104 of the chip of the second model after D/A converter module 105 is encrypted is as shown in L2 in Figure 11.After the communication interface 201 of imaging device receives the simulating signal in bus, send identification module 202 to, identification module 202 judges the model of chip by the voltage of simulating signal or frequency.
Concrete, the concrete grammar that different type information data convert the simulating signal of different wave to can be by above-mentioned D/A converter module 105: D/A converter module 105 is provided with default operation rule, when starting D/A converter module 105, after different type information data participate in computing as parameter, the waveform voltage of the simulating signal of output or frequency difference; Or in D/A converter module 105, store the corresponding relation of different model information data and different wave signal, when starting D/A converter module 105, D/A converter module 105 is according to the corresponding analog signal output of type information data genaration received.
As seen from Figure 11, the dissimilar chip that provides of the present embodiment to the voltage of the simulating signal exported after the information data encryption of same type or frequency different.And the type of chip is very many on the market, then counterfeiter the information data gathered as before again in a certain type chip cannot rewrite the information data relevant with type and just can copy various types of chip, adds the counterfeit difficulty of counterfeiter.It is the different signal of frequency or voltage that the information data of the chip that the embodiment of the present invention provides after D/A converter module 105 is encrypted passes in bus, for the non-original manufacturer of not knowing encryption rule, not easily gather and analyze, ensure that the safety of information data.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (11)
1. a method for die response imaging device, is characterized in that, chip has control module, memory module and D/A converter module, and described memory module stores the information data mutual with imaging device, and the method comprises:
Control module receives the instruction from imaging device;
According to the content of described instruction, send binary response data to described D/A converter module;
Described response data, according to the encryption rule preset, is converted to simulating signal by described D/A converter module at least partly;
The described response data being converted to simulating signal is at least partly exported to imaging device by bus.
2. method according to claim 1, wherein, if described instruction is addressing instruction,
The described content according to described instruction, sends binary response data to described D/A converter module, comprising:
Whether the slave addresses of relatively carrying in addressing instruction and the slave addresses of chip self match, if coupling, according to the rule of response preset, send binary response data to described D/A converter module.
3. method according to claim 1, wherein, if described instruction is broadcasting instructions,
The described content according to described instruction, sends binary response data to described D/A converter module, comprising:
According to the content of broadcasting instructions, extract binary information data of corresponding broadcasting instructions in described memory module and send to D/A converter module.
4. according to the method in claim 2 or 3, wherein, on same bus, in the response data that the chip of different slave addresses is exported to imaging device by bus the voltage of simulating signal or frequency or time delay or amplitude or phase place different.
5., according to the arbitrary described method of claim 1-3, wherein, if described instruction is information data reading command, the described content according to described instruction, sends binary response data to described D/A converter module, comprising:
According to the content of described information data reading command, extract binary information data corresponding with described information data reading command in described memory module and send to D/A converter module.
6. method according to claim 5, wherein, in dissimilar chip, the voltage of the simulating signal that the information data of same type generates after described D/A converter module encryption or frequency or time delay or amplitude or phase place different; And/or in same chip, the voltage of the simulating signal that dissimilar information data generates after the encryption of described D/A converter module or frequency or time delay or amplitude or phase place different.
7. method according to claim 6, wherein, the simulating signal that the information data of same type generates after described D/A converter module encryption represents corresponding binary number 0 and 1 respectively by different voltage or frequency.
8. a chip, chip is arranged on imaging cartridge, this chip comprises communication interface, the control module be electrically connected with described communication interface, the memory module that is electrically connected with described control module, described control module receives the instruction from imaging device by described communication interface, described memory module stores the information data mutual with imaging device, it is characterized in that:
Described chip also comprises D/A converter module, and described D/A converter module is provided with default encryption rule; Described control module is electrically connected with described D/A converter module, for the content according to described instruction, sends binary response data to described D/A converter module;
Described D/A converter module, is converted to simulating signal according to described encryption rule at least partly by the response data from control module, and exports the described response data being converted to simulating signal at least partly by described communication interface to imaging device.
9. chip according to claim 8, wherein, in dissimilar chip, the voltage of the simulating signal that the response data of same type generates after described D/A converter module encryption or frequency or time delay or amplitude or phase place different; And/or in same chip, the voltage of the simulating signal that dissimilar response data generates after the encryption of described D/A converter module or frequency or time delay or amplitude or phase place different.
10. an imaging system, comprise imaging device, and the dismountable imaging cartridge be arranged on imaging device, described imaging cartridge is provided with chip, described chip comprises communication interface, control module and memory module, described control module receives the instruction from imaging device by described communication interface, and described memory module stores the information data mutual with imaging device, it is characterized in that:
Described chip also comprises D/A converter module, and described D/A converter module is provided with default encryption rule; Described control module is electrically connected with described D/A converter module, for the content according to described instruction, sends binary response data to described D/A converter module;
Described D/A converter module, is converted to simulating signal according to described encryption rule by least part of information data of the response data from control module and is exported to imaging device by described communication interface;
Described imaging device is provided with identification module, and described identification module stores the deciphering rule corresponding with described encryption rule, for according to described deciphering rule, identifies the simulating signal in the response data received.
11. imaging systems according to claim 10, wherein, described according to described deciphering rule, identify the simulating signal in the response data received, comprising:
Simulating signal in the response data received is converted to digital signal, and/or according to the type of response data that the voltage of the simulating signal in the response data received or the feature of frequency or time delay or amplitude or phase place identify the type of chip or the address of chip or receives.
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