WO2006064824A1 - 記憶装置および記憶装置を備える印刷記録材容器 - Google Patents
記憶装置および記憶装置を備える印刷記録材容器 Download PDFInfo
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- WO2006064824A1 WO2006064824A1 PCT/JP2005/022911 JP2005022911W WO2006064824A1 WO 2006064824 A1 WO2006064824 A1 WO 2006064824A1 JP 2005022911 W JP2005022911 W JP 2005022911W WO 2006064824 A1 WO2006064824 A1 WO 2006064824A1
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- storage device
- memory array
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- 239000000463 material Substances 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 32
- 238000013500 data storage Methods 0.000 claims description 17
- 238000004458 analytical method Methods 0.000 claims description 12
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 12
- 210000004027 cell Anatomy 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 210000000352 storage cell Anatomy 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 230000000630 rising effect Effects 0.000 description 6
- 230000002123 temporal effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/14—Protection against unauthorised use of memory or access to memory
- G06F12/1416—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights
- G06F12/1425—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block
- G06F12/1433—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block for a module or a part of a module
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
Definitions
- Storage device and printing recording material container provided with storage device
- the present invention relates to storage devices connected to each other by a bus, and more particularly to a technique for controlling access to a storage device.
- a technology for controlling access (data writing) to a storage device for example, a technology for grounding a write-protect device for a storage device outside the storage device is known.
- a technique is known in which writing to the data storage area is prohibited by writing information indicating that writing to the data storage area is not permitted to an address behind the data storage area in the storage device when the storage device is used.
- a write-protect device is provided outside the storage device, it is necessary to provide a write-protect device outside the storage device.
- the technology that can set whether or not writing to the data storage area can be set at an address after the data storage area in the storage device, it takes time to determine whether or not writing to the data storage area is possible. There was a risk that unintended writing to the data storage area could be performed during the pass / fail judgment process.
- the write prohibition setting for the entire data storage area of the storage device is not always performed properly.
- the present invention has been made to solve the above-described problems, and it is an object of the present invention to quickly execute access control to a memory array of a storage device and suppress unintentional writing to the memory array.
- a first aspect of the present invention provides a storage device that is accessed sequentially from a head address.
- the storage device according to the first aspect of the present invention Is a non-volatile memory array that stores access control information indicating whether data can be written to the storage device at an address that is accessed before the data storage start address, and a write request or a read request for the memory array.
- a receiving unit that receives an access request including any of the above, and when the received access request is a write request to the memory array, the access control information in the memory array is referred to, and writing is permitted If not, an access control unit that does not execute the access request received above is provided.
- the storage device of the first aspect of the present invention when the received access request is a write request to the memory array, the access control information in the memory array is referred to and the write is not permitted.
- the storage device according to the first aspect of the present invention since the received access request is not executed, access control to the memory array of the storage device can be quickly executed and unintended writing to the memory array can be suppressed.
- the address in which the access control information is stored is the fourth address from the first address
- An input / output control unit for writing data to the memory array and reading data from the memory array; an instruction decoder for analyzing a write Z read instruction included in an access request input via the receiving unit; When the instruction analysis result by the instruction decoder is a write instruction, the access control information in the memory array is referred to. When writing is not permitted, the received write instruction is input / output.
- a read / write control unit that does not transmit to the control unit may be provided.
- the read control section refers to the access control information in the memory array when the instruction analysis result by the instruction decoder is a write instruction. If the write is not permitted, the received write command is not sent to the I / O control unit, so the access control to the memory array of the storage device is executed quickly and the memory array is not intended. Writing can be suppressed.
- the memory array stores identification information for identifying the storage device from a first address to a third address, and the access request further includes the storage Includes storage device identification information to identify the device,
- the storage device further includes an ID comparator that acquires the identification information from the memory array and determines whether or not the acquired identification information matches the storage device identification information included in the received access request. If the identification information and the storage device identification information match, an ID comparator that transmits a permission signal for permitting analysis of the instruction included in the access request to the instruction decoder. You may prepare.
- the receiving unit includes a clock signal terminal that receives a clock signal for designating an address in the memory array, and a data terminal for inputting and outputting data.
- the storage device further counts up a counter value in synchronization with the data path connected to the data terminal and the received queuing signal, designates the address of the memory array, and initializes it. Sometimes an address counter that resets the counter value to the initial value may be provided.
- the second aspect of the present invention provides a storage device that is accessed sequentially from the head address.
- the storage device according to the second aspect of the present invention stores identification information for identifying the storage device from the first address to the third address, and writes data to the storage device from the first address to the fourth address.
- a non-volatile memory array for storing access control information indicating whether or not data can be transferred, a clock signal terminal for receiving a clock signal for designating an address in the memory array, and a data terminal for inputting and outputting a data string
- a reset signal terminal for receiving a reset signal, a data bus connected to the data terminal, a counter value in synchronization with the received clock signal, and an address of the memory array are designated.
- an address counter that resets the counter value to the initial value at initialization and the data bus is connected.
- an ID comparator for determining whether or not the storage device identification information included in the data string matches the identification information stored in the memory array, the storage device identification information When the identification information matches, an ID comparator that outputs a permission signal that permits analysis of an instruction included in the data string, and is arranged between the memory array and the data terminal and received.
- the data transfer direction to the memory array and the data transfer direction of the data bus are controlled according to the instruction, and the data transfer direction with respect to the memory array is set to the data read direction and the data bus and the data bus until the instruction is received. Connected to the data bus and the ID comparator.
- an instruction decoder that analyzes an instruction included in the data string; and when the analysis result of the instruction by the instruction decoder is a write instruction, the access in the memory array
- a read-write control unit that refers to the control information and does not send the received write command to the input / output control unit when writing is not permitted is provided.
- the instruction analysis result is a write instruction. If it is, the access control information in the memory array is referred to. If the write is not permitted, the received write command is not sent to the input / output control unit, so the access control to the memory array of the storage device is performed. Can be executed quickly and unintentional writing to the memory array can be suppressed.
- a printing / recording material container comprising the storage device according to the first or second aspect of the present invention.
- the printing recording material container according to the third aspect of the present invention there is provided a storage device that can quickly execute access control to the data storage area and suppress unintended writing to the data storage area.
- a printing recording material container can be provided.
- the printing / recording material container may include a storage device having identification information that differs depending on the type of ink to be stored. 'In such a case, the ink type stored in the printing recording material container can be identified by the identification information.
- a fourth aspect of the present invention provides a storage device that is sequentially accessed in memory cell units from the access start position.
- the storage device according to the fourth aspect of the present invention includes a plurality of memory cells, stores identification information for identifying the storage device in the first three memory cells, and stores in the fourth memory cell from the beginning.
- a non-volatile memory array that stores access control information indicating whether or not writing to the storage device is possible, a receiving unit that receives an access request to the storage device, and the received access request includes a write request
- the access control unit refers to the access control information in the memory array, and when writing is not permitted, the access control unit does not execute the received access request.
- the storage device of the fourth aspect of the present invention when the write request is included in the received access request, the access control information in the memory array is referred to and the write is not permitted. Since the received access request is not executed, access control to the memory array of the storage device is executed quickly, Unintentional writing to the memory array can be suppressed.
- a read-only method for a non-volatile storage device having a memory array that is sequentially accessed and storing predetermined data.
- the read-only method for a storage device according to the fifth aspect of the present invention resets the counter value of the address counter to the initial value 1 and detects the counter value synchronized with the clock signal by detecting the reset signal.
- the count-up is prohibited, the data transfer direction of the data bus is set to the write direction based on the write command sent to the data path, the data transfer direction to the memory array is set to the write direction, and the data transfer direction
- the counter value synchronized with the clock signal in the address counter is allowed to be counted up, and data is written from the first address to the next address in a predetermined order according to the count value of the address counter.
- To the memory array from the first address to the address in the specified order. And wherein a call to write the access control information that prohibits the lump can.
- read-only data is written by writing data from the next address in a predetermined order from the first address and finally writing access control information from the first address to the address in the predetermined order. Since the storage device is manufactured, it is possible to manufacture a storage device that can quickly execute access control to the memory array and suppress unintended writing to the memory array.
- the access control information is written to a fourth address from the head address
- identification information may be written from the first address to the third address of the memory array according to the count value of the address counter.
- a sixth aspect of the present invention comprises a memory array that is accessed sequentially.
- a read-only method for a storage device that stores access control information indicating whether or not writing is possible at the fourth position from the beginning position of the storage area of the memory array.
- the method according to the sixth aspect of the present invention searches for identification information that matches the identification information stored in the memory array of the storage device, and identifies that matches the identification information stored in the memory array.
- the retrieved identification information and write command are sent to the storage device, and the identification information is next to the write data corresponding to the end position of the storage area of the memory array.
- a data string having access control information is sent to the storage device, and data is written to the end position of the storage area of the memory array according to the count value of the address counter, and then the storage area of the memory array is written. It is characterized by writing access control information indicating prohibition of reading to the fourth position from the head position.
- access control is performed to write data up to the end position of the storage area of the memory array, and subsequently prohibit reading at the fourth position from the start position of the storage area of the memory array. Since information is written, it is possible to manufacture a storage device that can quickly execute access control to the memory array and suppress unintended writing to the memory array.
- a seventh aspect of the present invention there is provided a plurality of nonvolatile storage devices that are bus-connected to the clock signal line, the data signal line, and the reset signal line, and the memory is stored via the clock signal line, the data signal line, and the reset signal line.
- a storage system including a device and a control device connected to the device is provided.
- the control device comprises:
- a clock signal generation circuit for generating a reset signal for initializing the storage device; and identification information for issuing identification information corresponding to identification information of a desired storage device among the plurality of storage devices
- An issuance circuit, and a data string including the issued identification information and a read / write command in synchronization with the generated clock signal A data transmission circuit for transmitting the data to the data signal line,
- a data bus connected to the data signal line, a memory array which is sequentially accessed, and access control information indicating whether or not data can be written is stored in a predetermined position from the head position of the storage area;
- An ID comparator that is connected to the data bus and determines whether or not the identification information sent from the control device matches the identification information stored in the memory array; and the memory array and An input / output control device that is arranged between the data buses and controls data transfer to the data bus and the memory array in accordance with a received command; the data bus and the ID comparator comparison device; and the comparison
- the identification information sent from the control device by the device and the memory array If it is determined that the stored identification information matches, an instruction decoder that analyzes a write Z read instruction included in the data string, and is arranged between the input / output control device and the instruction decoder, If the analyzed instruction is a write instruction, refer to the access control information in the memory array, and if writing is not permitted, do not send a write instruction to the I / O controller
- the storage system of the seventh aspect of the present invention it is possible to manufacture a storage device that can quickly execute access control to the memory array and suppress unintended writing to the memory array. .
- the storage device further increments a counter value in synchronization with a clock signal input via the clock signal line, and accesses a storage area of the storage cell.
- An address counter is provided to specify the power position and reset the counter value to the initial value at initialization.
- the input / output controller transfers data to the memory array at initialization.
- the state at the time of initialization may be maintained until the direction is set to the read direction and the data transfer to the data bus is interrupted until the analysis of the write / read command by the command decoder is completed.
- FIG. 1 is an explanatory diagram showing a configuration example of a storage system including a plurality of storage devices and a host computer according to the present embodiment.
- FIG. 2 is an explanatory diagram showing an example of a data string transmitted from the host computer in a normal state.
- FIG. 3 is an explanatory diagram showing an example of a data string sent from the host computer when writing to the storage device at the time of shipment from the factory.
- FIG. 4 is a block diagram showing an internal circuit configuration of the storage device according to the embodiment.
- FIG. 5 is a flowchart showing a processing routine executed by the host computer when accessing the storage device.
- FIG. 6 is a flowchart showing the processing routine executed by each component circuit of the storage device when accessed by the host computer.
- FIG. 7 is a timing chart showing the temporal relationship between the reset signal RST, the clock signal SCK, the data signal CDA, and the address counter value during data reading.
- Figure 8 is a timing chart showing the temporal relationship between the reset signal RST, clock signal SCK :, data signal CDA, and address counter value when writing data.
- Figure 9 is a flowchart showing the flow of data write processing to the storage device at the time of shipment from the factory.
- FIG. 10 is an explanatory diagram showing an example of the connection relationship between the setting host computer and the storage device when performing the factory write process.
- FIG. 11 is an explanatory diagram showing an example in which the storage device is applied to an ink cartridge in the embodiment.
- FIG. 1 is an explanatory diagram illustrating a configuration example of a storage system including a plurality of storage devices and a host computer according to the present embodiment.
- the storage system includes a host computer 10 and five storage devices 20, 21, 22, which are arranged on the memory module board 200 and whose access is controlled by the host computer 10. 2 and 24.
- Each storage device 20, 2 1, 22, 23, 24 is placed in each of the five color ink cartridges C 1, C 2, C 3, C 4, C 5 for the ink jet printer as shown in Fig. 11. It shall be provided.
- the five-color ink cartridges C1, C2, C3, C4, and C5 contain, for example, cyan, light cyan, magenta, light magenta, and yellow ink.
- the storage device in the present embodiment is an E EPROM that holds the stored contents in a nonvolatile manner and is accessed sequentially from the top address in 1-bit units.
- FIG. 1 only the storage devices 20, 2 1, 22, 23, 24 are shown for ease of explanation. However, as described above, the storage devices 20, 2 1, twenty two, 23 and 24 are actually provided in the ink cartridges C1, C2, C3, C4, and C5.
- Data signal terminal DT, clock signal terminal CT, reset signal terminal RT of each storage device 20, 2 1, 22, 23, 24 are connected through data bus DB, clock bus CB, reset bus RB, respectively. (See Figure 4).
- the host computer 10 is connected to the data bus DB, the clock bus CB, and the reset bus RB via the data signal line DL, the clock signal line C L, and the reset signal line RL.
- These signal lines can be realized, for example, as a flexible feed cable (F FC).
- the power supply positive terminal VDDH of the host computer 10 and the power supply positive terminal V D DM of each storage device 20, 2 1, 22, 23, 24 are connected via the power supply line V D L.
- a power supply negative signal line VS L for serially connecting the power supply negative terminals V SS of the storage devices 20, 21, 22, 23, 24 is arranged.
- One end of the power supply negative signal line VS L is grounded, and the other end is connected to the force trit detection terminal COT of the host computer 10 via the cartridge signal line COL.
- the host computer 10 includes a control device that has a clock signal generation circuit, a reset signal generation circuit, a power supply monitoring circuit, a power supply circuit, a power supply compensation circuit, a data storage circuit, and a control circuit that controls each circuit (not shown). And controls access to the storage devices 20, 2 1, 22, 23, 24.
- the host computer 10 is arranged on the main body side of the ink jet printer, for example, and the control circuit of the host computer 10 that acquires data such as ink consumption and ink cartridge installation time and stores it in the data storage circuit is, for example, Execute access to storage devices 20, 21, 22, 23, 24 when the inkjet printer is turned on, the ink cartridge is replaced, the print job is completed, or the inkjet printer is turned off.
- the control circuit of the host computer 10 has storage devices 20, 2 1, When accessing 2 2, 2 3, or 2 4, the reset signal generation circuit is requested to generate the reset signal RST. Therefore, the reset signal RST is also generated when a power failure or power plug is removed.
- the power supply compensation circuit of the host computer 10 supplies power for a predetermined period (eg, 0.3 s) even when power supply is interrupted. For example, a capacitor is used as the power supply compensation circuit.
- the control circuit of the host computer 10 controls the output of the positive power supply by controlling the power supply circuit.
- the host computer 10 does not always supply power to the storage devices 20, 2 1, 2 2, 2 3, 2 4, and the storage devices 2 0, 2 1, 2 Only when an access request to 2, 2 3, 2 4 is generated, the positive power is supplied to the storage devices 2 0, 2 1, 2 2, 2 3, 2 4.
- FIG. 2 is an explanatory diagram showing an example of a data string transmitted from the host computer 10 during normal operation.
- FIG. 3 is an explanatory diagram showing an example of a data string sent from the host computer when writing to the storage device at the time of shipment from the factory.
- the data sequence sent from the host computer 10 normally has a 3-bit identification data part, a 1-bit read Z-write command part, and a 1- to 2-52 2-bit write / read.
- a data storage unit is provided.
- the data string sent from the setting host computer consists of a 1-bit write command section and 1-bit to 256-bit write data section as shown in Figure 3. Is provided.
- the identification data is stored in the first 3 bits of the last 4 bits of the write data section, and the last 4 bits are written. Access control information indicating whether or not writing to the memory array 210 is possible is arranged in the last bit.
- the fourth bit (fourth address) from the head of the memory array has access control information indicating whether or not writing to the memory array is possible. Stored.
- This access control information When data is written before shipment, it is stored in the memory array along with the write data (stored data).
- the clock signal generation circuit of the host computer 10 generates, for example, a clock signal SCK at intervals of 4 / S when reading data from the storage devices 20, 2 1, 2 2, 23, 24, and at the time of writing data Generates a clock signal SCK with an interval of 3ms.
- FIG. 4 is a block diagram showing an internal circuit configuration of the storage device 20.
- the internal configuration of each storage device 20, 21, 22, 23, 24 is the same except for the stored identification information (identification data) and unique data.
- the internal configuration of the storage device 20 will be described.
- the storage device 20 includes a memory array 201, an address counter 202, an ID comparator 20 3, an operation code decoder 204, an I / O controller 20
- the memory array 201 has a predetermined capacity, for example, a 256-bit storage area, and the identification data is stored in the storage area from the top 3 bits (up to the third address), and the fourth bit from the start.
- Access control information for prohibiting writing to 1 is stored.
- access control information for prohibiting writing to the memory array 2 0 1 is stored in order to prevent subsequent writing to the storage devices 2 0 to 2 4.
- the identification data is stored in the first 3 bits of the data string transmitted from the host computer 10 and the write / read command is stored in the 4th bit from the beginning. Therefore, data is not written unless it is the storage area after the 5th bit (fifth address) from the beginning, and the storage area of the memory array 2 0 1 has such a configuration.
- First 4 addresses is a read-only storage area. If the address starts from 0, address 0 corresponds to the first address or the first bit. If the address starts from 1, address 1 corresponds to the first address or Corresponds to the 1st bit.
- the address counter 20 2 is a circuit that increments the counter value in synchronization with the clock signal S CK input to the clock signal terminal C T, and is connected to the memory array 2 0 1.
- the counter value and the storage area position (address) of the memory array 2 0 1 are associated with each other, and the write position or the read position in the memory array 2 0 1 can be specified by the counter value of the address counter 2 0 2. it can.
- the address counter 202 is also connected to the reset signal terminal RT, and when the reset signal RST is input, the counter value is reset to the initial value.
- the initial value may be any value as long as it is associated with the head position of the memory array 201, and generally 0 is used as the initial value.
- the ID comparator 20 03 is connected to the clock signal terminal CT, the data signal terminal DT, and the reset signal terminal RT, and the identification data included in the data string input via the data signal terminal DT and the memory array 20 Determine whether the identification data stored in 1 matches. More specifically, ID comparators 2 and 3 obtain 3-bit data that is input after reset signal RST is input, that is, identification data. The ID comparator 2 0 3 uses the identification data included in the data string. A 3-bit register (not shown) for storing data, and a 3-bit register (not shown) for storing identification data obtained from the memory array 20 1 via the I / O controller 205. Whether the identification data matches is determined by whether the register values match.
- the ID comparator 20 0 3 sends the access permission signal EN to the operation code decoder 2 0 4 when the two identification data match.
- the ID comparator 2 0 3 clears the register value when the reset signal RST is input.
- the ID comparator 2 0 3 of the storage device 20 and all other storage devices 2 1, 2 2, 2 3, 2 4 has common identification data, for example, (1, 1, 1) in this embodiment. Stored. This common identification data is held by the ID comparators of the storage devices 20, 2 1, 2 2, 2 3, 24, so that each storage device 20, 2 1, 2 2, 2 3, 2 4 On the other hand, writing of data to be written in common can be executed simultaneously.
- the operation code decoder 20 4 is connected to the ID comparator 20 3, read write controller 20 6, clock signal terminal CT, and data signal terminal DT.
- the operation code decoder 20 4 obtains the fourth bit data input after the reset signal RST is input, that is, the write / read command, from the data string input from the data signal terminal DT.
- the access permission signal EN is input from the ID comparator 2 0 3
- the operation code decoder 2 0 4 analyzes the acquired write / read command and requests the read controller 2 0 6 to perform a write process request or read process. Send a request.
- Controller 2 0 5 is connected to data signal terminal DT and memory array 2 0 1, and according to the request from read controller 2 0 6, data transfer direction to memory array 2 0 1 and data signal terminal DT Switches the data transfer direction (for the signal line connected to the data signal terminal DT).
- the I ZO controller 2 0 5 is also connected to the reset signal terminal RT. Receives RST signal.
- the I / O controller 205 includes a first buffer memory (not shown) that temporarily stores data read from the memory array 201 and write data to the memory array 201, and data from the data bus DB. And a second buffer memory (not shown) for temporarily storing data to the data bus D D.
- the I / O controller 205 is initialized by the input of the reset signal RS ⁇ .
- the data transfer direction to the memory array 201 is set to the read direction, and the signal line connected to the data signal terminal DT is set. Data transfer to the data signal terminal DT is prohibited by setting it to high impedance.
- This initialization state is maintained until a write process request or a read process request is input from the read controller 206.
- the write process request or read process request is input from the read controller 206 after the end of the write determination process using the fourth bit data of the data string. Therefore, 4-bit data from the beginning of the data string input via the data signal terminal D after input of the reset signal is not written to the memory array 201.
- the data stored in the first 4 bits of the memory array 201 is sent to the ID comparator 203. As a result, the first 4 bits (addresses from the beginning to the fourth) of the memory array 201 are in a read-only state.
- the read-write controller 206 is connected to the operation code decoder 204, the I / O controller 205, and the memory array 201.
- the read / write controller 206 determines whether or not writing to the memory array 201 is possible. More specifically, the read controller 206 accesses the fourth address from the beginning of the memory array 2 0 1 and stores the access control information indicating write prohibition, that is, the fourth address from the beginning. It is determined whether or not “0” is recorded. Relay controller 20 6 If access control information indicating prohibition of writing is stored, the write processing request from the operation code decoder 204 is discarded without being transferred to the I / O controller 205.
- the read / write controller 206 transfers the write processing request from the operation code decoder 204 to the I / O controller 205 when access control information indicating write permission is stored. If the input from the operation code decoder 204 is a read processing request, the read controller 206 determines whether or not access control information indicating write prohibition is stored in the memory array 201. I Transfers the read request to the ZO controller 20 5. Note that the operation code decoder 204, the I / O controller 205, and the read controller 206 may be realized by a single functional circuit as an access control means.
- FIG. 5 is a flowchart showing a processing routine executed by the host computer 10 when accessing the storage devices 20, 21, 22, 23, 24.
- FIG. 6 is a flow chart showing a processing routine executed by each component circuit of the storage devices 20, 21, 22, 23, 24 when accessed by the host computer 10.
- FIG. 7 is a timing chart showing the temporal relationship of the reset signal RST, clock signal SCK, data signal CDA, and address counter value during data reading.
- FIG. 8 is a timing chart showing the temporal relationship between the reset signal R ST, the clock signal S CK, the data signal CD A, and the address counter value when writing data.
- the control circuit of the host computer 10 waits until the input value CO of the cartridge out signal line COL becomes 0 (step S100: No). Ie all When the ink cartridge is correctly stored in the ink cartridge holder, the power supply negative signal line VS L is serially connected and grounded, so the input value CO of the cartridge out signal line CO L is the ground voltage (for example, This is because it shows about 0 volts. On the other hand, even if one ink cartridge is not correctly stored in the ink cartridge holder, the power supply negative signal line VS L is not connected to the serial, so it is not grounded and is not connected to the circuit voltage of the control circuit. The corresponding value appears on the cartridge-out signal line COL. However, in this embodiment, binarization is performed based on a predetermined threshold value in order to eliminate the influence of noise and the like. Therefore, the input value CO of the cartridge signal line COL takes 0 or 1.
- the reset signal RST is active / low, and the terms “reset signal RST used in this specification” is generated and input means “reset / low signal” unless otherwise specified. Shall.
- the control circuit of the host computer 10 issues identification data (ID data) of the ink cartridge (storage devices 2 0, 2 1, 2 2, 2 3, 2 4) that is desired to be accessed (step S 1 3 0 )
- ID data is synchronized with the rising edge of the clock signal SCK as shown in Figures 7 and 8. It is transferred to the data bus DB via the signal line DL.
- the control circuit of the host computer 10 determines whether or not the issued ID data is (1, 1, 1) (step S 140).
- the ID data (1, 1, 1) is the identification data stored in advance in the ID comparators of all storage devices 2 0, 2 1, 2 2, 23, 24.
- the ID data is (1, 1, 1), data can be written to all the storage devices 20, 2 1, 2 2, 23, 24 simultaneously.
- the control circuit of the host computer 10 requests the clock signal generation circuit to decrease the speed of the clock signal SCK, that is, to increase the generation interval of the clock signal SCK (step S 1 60).
- the time required to write data to the EE PROM is, for example, about 3 ms, and the time required to read data is, for example, about 43. Therefore, when writing data, it takes about 1 000 times the time required to read data.
- the storage devices 20, 2 1, 22, 23, and 24 are accessed at a high clock signal speed, and the data write process is performed.
- the access time is shortened and reliable data writing is realized.
- step S1440 No
- the read command (Read) or write command Either (Write) is issued (Step S 1 7 0).
- the issued command is sent to the data bus DB via the data signal line DL.
- step S 1700: Write the control circuit of the host computer 10 delays the clock signal speed (step S1600).
- Step S 1 70: Read the clock signal speed is maintained.
- address counter 202 When a reset low signal is input to reset bus RB, address counter 202 resets the counter value to the initial value (0) (step S20 0). Also, the ID comparator 20 3 and the I ZO controller 2 0 5 are initialized. That is, the two registers in the ID con- verter are cleared, and the I / O controller 205 sets the data transfer direction to the memory array 201 to the read direction and sets the signal line connected to the data signal terminal D D. High impedance and data Data transfer is prohibited.
- the host computer 10 sends various data in synchronization with the rising edge of the clock signal SCK.
- the address counter 202 increments the power counter value one by one from the initial value in synchronization with the rising edge of the clock signal S CK.
- the ID comparator 203 receives the data sent to the data bus DB in synchronization with the rising edges of the three clock signals SCK after the reset signal RST is switched from low to high, that is, three bits. ID data is acquired and stored in the first 3-bit register (step S 2 10 a). At the same time, the ID comparator 203 acquires data from the address of the memory array 201 specified by the counter values 00, 01, 02 of the address counter 202 (step S220b). That is, the identification data stored in the first to third addresses (memory cells, storage area) of the memory array 201 are acquired and stored in the second 3-bit register.
- the ID comparator 203 determines whether or not the ID data (identification data) stored in the first and second registers matches (step S220). Further, the ID comparator 203 determines whether or not the common ID data held in advance matches the ID data stored in the first register. If the ID comparator 203 determines that the ID data does not match (step S 220: No), it requests the I / O controller 205 to release the data bus. Upon receipt of the request, the I ⁇ controller 205 releases the path (step S270), and ends this processing routine. That is, access to the memory array 20 1 by the host computer 10 is not permitted, and the access process in the storage device 20 is terminated. In such a case, access to any of the other storage devices 2 1, 22, 2 3, 24 is permitted.
- the ID comparator 203 determines that the ID data match (step S 2 20: Yes)
- the ID comparator 203 sends an access permission signal EN to the age code decoder 204 (step S 230).
- the operation code decoder 204 that has received the access permission signal EN receives the read / write command sent to the data bus in synchronization with the rising edge of the fourth clock signal SCK after the reset signal RST switches from low to high. And the command is decoded (step S 25 0).
- the operation code decoder 204 sends the decoded read / write command to the read write controller 206.
- the read controller 20 6 determines whether or not the decoded command input from the operation code decoder 204 is a write command (step S 240). If the read / write controller 206 determines that the instruction is a write instruction (step S240: Yes), it acquires access control information from the fourth address from the beginning of the memory array 201 (step S). 2 50).
- the read controller 206 determines whether or not writing to the memory array 201 is possible (step S 260). Specifically, the read write controller 206 determines whether or not the acquired access control information indicates write prohibition, that is, whether or not it is “0”. If the read controller 20 6 determines that writing to the memory array 201 is possible, that is, if it determines that the access control information does not indicate write prohibition (indicates write permission) (step S). 26 0: Y es), the write command received from the operation code decoder 204 is sent to the I / O controller 205.
- the I / O controller 20 5 that has received the write command changes the data transfer direction to the memory array 2 0 1 to the write direction, cancels the high impedance setting of the signal line connected to the data terminal DT, and performs data transfer. Allow transfer (step S 27 0).
- the write data sent to the data bus is the address of the memory array 2 0 1 specified by the counter value of the address counter 2 0 2 that is sequentially counted up in synchronization with the clock signal S CK. (Position) is stored sequentially one bit at a time. Since the storage device 20 according to the present embodiment is sequentially accessed in this way, the write data sent from the host computer 10 is the memory array 2 except for the data corresponding to the address desired to be rewritten. 0 1 has the same value (0 or 1) as the data currently stored. In other words, the address data that cannot be rewritten in the memory array 201 is overwritten with the same value.
- step S If the read controller 2 06 determines that writing to the memory array 2 0 1 is impossible, that is, if it determines that the acquired access control information indicates write prohibition (step S). 2 6 0: No), The write command received from the operation code decoder 204 is not sent to the I ZO controller 2 0 5. The read controller 20 requests the I / O controller 205 to release the data bus, and the controller 205 releases the data bus and terminates this processing routine. (Step S 2 8 0).
- the read controller 20 06 determines that it is not a write command (step S 24 0: ⁇ ⁇ ), it reads the read command received from the operation code decoder 20 4 to the I / O controller 2 0 5 To send.
- the I 0 controller 2.0 5 that receives the read command changes the data transfer direction to the memory array 2 0 1 to the read direction, cancels the high impedance setting of the signal line connected to the data terminal DT, and allows data transfer. To do. (Step S 2 90). In this state, the data stored in the memory array 2 0 1 is stored in the clock signal SC. Sequentially read in the order of the address (position) specified by the counter value of the address counter 202 that is incremented sequentially in synchronization with K, and overwritten in the first buffer memory of the I / O controller 205 in sequence. .
- the controller 205 sends the read data held in the second buffer memory to the data bus D ⁇ ⁇ ⁇ via the data terminal DT and transfers it to the host computer 10.
- FIG. 9 is a flowchart showing the flow of data writing processing to the storage device at the time of shipment from the factory.
- FIG. 10 is an explanatory diagram showing an example of the connection relationship between the setting host computer and the storage device when performing the factory write process.
- the following processing is performed when the ink cartridge is manufactured, with the storage device 20 attached to the ink cartridge, and as shown in FIG. 10, the host computer for each terminal CT, DT, RT (probe) of the storage device 20 This can be done by connecting the signal lines from 1 00 (or a dedicated setting host computer) one to one. “1” is stored as a data value in the first 4 bits of the memory array 201 of the storage device 20 used at this time or in all storage areas. First, setup host The computer 1 0 0 issues ID data “1, 1, 1 J, and causes the ID comparator 2 0 3 to output an access permission signal EN to the operation code decoder 2 0 4.
- the setting host computer 1 0 0 When the setting host computer 1 0 0 detects the access permission signal EN from the ID comparator 2 0 3, it writes data having the same capacity as that of the memory array 2 0 1 to the memory array 2 0 1 (S 3 0 0 ) As described with reference to FIG. 3, the data sequence sent from the setting host computer 1 0 0 is described with the write processing command in the first bit, followed by the data after the 5th bit, and the last The identification information is described in the first 3 bits of the 4 bits, and the access control information is described in the last bit of the last 4 bits.
- the memory array 2 0 1 has a 1-bit capacity allocated to each of the addresses from the 0 (1) th address to the 2 5 5 (2 5 6) th address. It has a 6-bit capacity. Therefore, in step S 3 0 0, data having a capacity of 2 5 2 bits is written from the writable 5th bit (fifth address) to 2 5 6th bit (2 5 6th address).
- the setting host computer 1 0 0 receives 3 bits capacity data (identification data) from 2 5 7 to 2 5 9 bits and 1 bit capacity data (access control information) of bits 2 60 Write to the memory array 20 1 (step S 3 1 0), and the processing routine is terminated. That is, since writing has already been completed up to the 2nd and 6th bits of the address of the memory array 20 1, the newly written data is the 1st to 3rd bits from the beginning of the memory array 2 0 1 ( 1st power, 3rd address) and 4th bit (4th address). As a result, the identification data is written in the first 3 bits of the memory array 201, and the access control information indicating prohibition of data writing to the memory array 2101 is written in the fourth bit from the beginning.
- Whether or not writing to the storage device 2 0 is possible is determined by using the access control information stored in the fourth bit from the beginning of the memory array 2 0 1. Can be quickly determined.
- a plurality of storage devices 20 to 24 are provided. In the memory system, it is possible to quickly identify the target storage device and determine whether writing to the identified storage device is permitted.
- the storage device 20 is mounted on the ink cartridge and shipped, new writing to the storage device 20 is prohibited, and the storage device 20 is read.
- Dedicated That is, after the ink cartridge is shipped from the factory, writing to the storage device 20 can be prohibited. Therefore, it is possible to prevent overwriting of identification information as well as data related to ink stored in the 5th and subsequent bits.
- access control information indicating write prohibition is stored in the 4th bit (fourth address) from the beginning of the memory array 2 0 1, but it is stored in the memory array 2 0 1 It may be stored in another address as long as it is before the data to be processed.
- the identification information does not need to be 3 bits, and the capacity of the identification data of the stored data can be appropriately changed depending on the number of storage devices to be identified. Further, The capacity of the memory array 20 1 is not limited to 256 bits, and can be changed as appropriate according to the amount of data to be stored.
- the EE PROM has been described as the storage device 20.
- any storage device that can store stored data in a nonvolatile manner and can read and store the stored data can be used. Not limited to EE PROM.
- identification data is stored in the first 3 bits of the memory array 201.
- the capacity of the identification data can be changed as appropriate depending on the number of storage devices to be identified.
- the capacity of the memory array 201 is not limited to 256 bits, and can be appropriately changed according to the amount of data to be stored.
- the storage device 20 according to the present embodiment can be applied to ink cartridges of two to four colors, or six or more colors.
- the correspondence between the identification information and the storage devices 20 to 24 is not only the ink type and ink color of the ink cartridge in which the storage devices 20 to 24 are mounted, but also the initial ink amount stored in the ink cartridge. It's okay.
- the storage device 20 according to this embodiment has been described as a storage device for storing ink cartridge information in an ink cartridge for an ink jet printer, but the storage device 20 according to this embodiment is Of course, it can be used in other embodiments. That is, in a system using multiple storage devices, identification data is stored in the first 3 bits of the memory array 201 to access a specific storage device, but the capacity of the identification data is the memory to be identified. It can be appropriately changed depending on the number of devices. Further, the capacity of the memory array 201 is not limited to 2 5 6 bits, and can be appropriately changed according to the amount of data to be stored.
- the reset signal RST is output even when the power is shut down, so even if the power is accidentally shut off during data writing. Even if the connection is interrupted, writing is completed for the data that has been written at that time, and since data is written in 1-bit units in this embodiment, the data that has been written is not Problems such as data corruption can be avoided
- the power supply compensation circuit compensates the power supply for a predetermined period, and at the time of data writing, data is written in order starting from write priority data such as ink remaining amount or ink consumption. Therefore, even when writing to a plurality of storage devices 2 0, 2 1, 2 2, 2 3, 2 4 is necessary, writing of write priority data to all the storage devices can be completed.
- the storage device, the storage system, and the read-only method for the storage device according to the present invention have been described based on the embodiments.
- the above-described embodiment of the present invention is intended to facilitate understanding of the present invention.
- the present invention is not limited thereto.
- the present invention can be changed and improved without departing from the spirit and scope of the claims, and the present invention includes the equivalents thereof.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP05816750A EP1835387A4 (en) | 2004-12-14 | 2005-12-07 | MEMORY DEVICE AND PRINT RECORDING MATERIAL VESSEL WITH THIS MEMORY DEVICE |
US11/516,941 US7433260B2 (en) | 2004-12-14 | 2006-09-06 | Memory device and print recording material receptacle providing memory device |
Applications Claiming Priority (2)
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JP2004-360787 | 2004-12-14 | ||
JP2004360787A JP2006171930A (ja) | 2004-12-14 | 2004-12-14 | 記憶装置および記憶装置を備える印刷記録材容器 |
Related Child Applications (1)
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US11/516,941 Continuation US7433260B2 (en) | 2004-12-14 | 2006-09-06 | Memory device and print recording material receptacle providing memory device |
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WO2006064824A1 true WO2006064824A1 (ja) | 2006-06-22 |
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PCT/JP2005/022911 WO2006064824A1 (ja) | 2004-12-14 | 2005-12-07 | 記憶装置および記憶装置を備える印刷記録材容器 |
Country Status (5)
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US (1) | US7433260B2 (ja) |
EP (1) | EP1835387A4 (ja) |
JP (1) | JP2006171930A (ja) |
CN (1) | CN1947089A (ja) |
WO (1) | WO2006064824A1 (ja) |
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US20090100238A1 (en) * | 2006-03-14 | 2009-04-16 | Masaharu Adachi | Memory card and memory card control changeover method |
KR101425621B1 (ko) * | 2008-01-15 | 2014-07-31 | 삼성전자주식회사 | 컨텐츠를 안전하게 공유하는 방법 및 시스템 |
CN102065386A (zh) * | 2009-11-16 | 2011-05-18 | 高通股份有限公司 | 通信系统中垃圾消息防范的方法和装置 |
TWI424445B (zh) | 2009-12-29 | 2014-01-21 | Macronix Int Co Ltd | 指令解碼電路及其方法 |
KR20150051117A (ko) * | 2013-11-01 | 2015-05-11 | 삼성전자주식회사 | 화상 형성 장치의 소모품 유닛에 탑재 가능한 crum 유닛 및 이를 이용한 화상 형성 장치 |
US9990316B2 (en) * | 2015-09-21 | 2018-06-05 | Qualcomm Incorporated | Enhanced serial peripheral interface |
US10119099B2 (en) * | 2017-01-10 | 2018-11-06 | Envirox, L.L.C. | Peroxide based multi-purpose cleaner, degreaser, sanitizer/virucide and associated solutions and methods for preparing the same |
CN109358825A (zh) * | 2018-10-12 | 2019-02-19 | 江门市骏前纸箱有限公司 | 一种图像印刷系统 |
Citations (1)
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JP2001166649A (ja) * | 1999-10-01 | 2001-06-22 | Canon Inc | 印刷装置及びその制御方法、並びに印刷装置に装着されるメモリを有する消耗部品 |
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JPH0844628A (ja) * | 1994-08-03 | 1996-02-16 | Hitachi Ltd | 不揮発性メモリ、およびそれを用いたメモリカード、情報処理装置、ならびに不揮発性メモリのソフトウェアライトプロテクト制御方法 |
JPH10302485A (ja) | 1997-04-28 | 1998-11-13 | Hitachi Inf Technol:Kk | フラッシュ・メモリを有する情報処理装置 |
JP4081963B2 (ja) * | 2000-06-30 | 2008-04-30 | セイコーエプソン株式会社 | 記憶装置および記憶装置に対するアクセス方法 |
JP2004242891A (ja) | 2003-02-14 | 2004-09-02 | Heiwa Corp | データ記憶装置 |
JP4802722B2 (ja) * | 2006-01-17 | 2011-10-26 | セイコーエプソン株式会社 | シーケンシャルアクセスメモリ |
-
2004
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2005
- 2005-12-07 CN CNA2005800132531A patent/CN1947089A/zh active Pending
- 2005-12-07 EP EP05816750A patent/EP1835387A4/en not_active Withdrawn
- 2005-12-07 WO PCT/JP2005/022911 patent/WO2006064824A1/ja active Application Filing
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JP2001166649A (ja) * | 1999-10-01 | 2001-06-22 | Canon Inc | 印刷装置及びその制御方法、並びに印刷装置に装着されるメモリを有する消耗部品 |
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US20070016734A1 (en) | 2007-01-18 |
CN1947089A (zh) | 2007-04-11 |
US7433260B2 (en) | 2008-10-07 |
EP1835387A1 (en) | 2007-09-19 |
EP1835387A4 (en) | 2009-10-07 |
JP2006171930A (ja) | 2006-06-29 |
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