Patent Publication Number: US-2023153563-A1

Title: Noncontact storage medium, magnetic tape cartridge, method for operating noncontact storage medium, and program

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of International Application No. PCT/JP2021/023745, filed Jun. 23, 2021, the disclosure of which is incorporated herein by reference in its entirety. Further, this application claims priority from Japanese Patent Application No. 2020-128582, filed Jul. 29, 2020, the disclosure of which is incorporated herein by reference in its entirety. 
    
    
     BACKGROUND 
     1. Technical Field 
     A technique of the present disclosure relates to a noncontact storage medium, a magnetic tape cartridge, a method for operating a noncontact storage medium, and a program. 
     2. Related Art 
     WO2019/198323A discloses a magnetic tape cartridge. A magnetic tape is housed in the magnetic tape cartridge. The magnetic tape cartridge is loaded into a tape drive device for use. A head unit is mounted in the tape drive device. The head unit selectively performs write-in and readout of data to and from the magnetic tape. 
     A cartridge memory is mounted in the magnetic tape cartridge described in WO2019/198323A. Information for managing the magnetic tape is stored in the cartridge memory. The cartridge memory is a noncontact communication medium where an antenna coil, an IC chip, and the like are mounted on a substrate. In WO2019/198323A, a radio frequency identifier (RFID) tag is illustrated as the noncontact communication medium. A reader/writer is mounted in the tape drive device. The reader/writer performs wireless communication with the cartridge memory to perform reading and writing of information from and to the cartridge memory in a noncontact manner. 
     SUMMARY 
     An embodiment according to the technique of the present disclosure provides a noncontact storage medium, a magnetic tape cartridge, a method for operating a noncontact communication medium, and a program that enable a noncontact storage medium mounted in a magnetic tape cartridge to perform noncontact communication with communication destinations of various communication standards, compared to a case where an IC chip of a noncontact storage medium mounted in a magnetic tape cartridge performs noncontact communication with a communication destination using only one communication standard. 
     A first aspect according to the technique of the present disclosure is a noncontact storage medium that is mounted in a magnetic tape cartridge, the noncontact storage medium comprising an IC chip that is connected to an antenna to be coupled to a communication destination by electromagnetic induction through a magnetic field applied from the communication destination, and performs communication with the communication destination through the magnetic field, in which the IC chip corresponds to a plurality of communication standards, and performs the communication selectively using the plurality of communication standards. 
     A second aspect according to the technique of the present disclosure is the noncontact storage medium according to the first aspect, in which the communication destination is any of a plurality of communication devices, and the plurality of communication devices have any of a plurality of communication standards. 
     A third aspect according to the technique of the present disclosure is the noncontact storage medium according to the second aspect, in which the IC chip has a determination circuit that determines a communication standard of a communication command given from the communication destination through the magnetic field, and the IC chip performs the communication using an adaptive communication standard that is a communication standard selected from the plurality of communication standards depending on a determination result in the determination circuit. 
     A fourth aspect according to the technique of the present disclosure is the noncontact storage medium according to the third aspect, in which the IC chip decodes the communication command for which the communication standard is determined by the determination circuit, and transmits a response signal corresponding to a command obtained by decoding the communication command to the communication destination through the magnetic field using the adaptive communication standard. 
     A fifth aspect according to the technique of the present disclosure is the noncontact storage medium according to the fourth aspect, in which the IC chip performs the communication with the communication destination using the adaptive communication standard until a predetermined condition is satisfied. 
     A sixth aspect according to the technique of the present disclosure is the noncontact storage medium according to the fifth aspect, in which the predetermined condition includes a condition that power for driving the IC chip is in short. 
     A seventh aspect according to the technique of the present disclosure is the noncontact storage medium according to the sixth aspect, in which the IC chip has a non-volatile memory, stores adaptive communication standard information indicating an adaptive communication standard selected depending on the determination result in the non-volatile memory, performs the communication with the communication destination using an adaptive communication standard that is indicated by the adaptive communication standard information stored in the non-volatile memory, and erases the adaptive communication standard information in the non-volatile memory under a condition that the power is in short. 
     An eighth aspect according to the technique of the present disclosure is the noncontact storage medium according to the sixth aspect, in which the IC chip has a volatile memory, and stores adaptive communication standard information indicating an adaptive communication standard selected depending on the determination result in the volatile memory, and the predetermined condition includes a condition that the adaptive communication standard information is erased from the volatile memory due to a shortage of the power. 
     A ninth aspect according to the technique of the present disclosure is the noncontact storage medium according to any one of the fifth aspect to the eighth aspect, in which the IC chip skips the determination by the determination circuit until the predetermined condition is satisfied. 
     A tenth aspect according to the technique of the present disclosure is the noncontact storage medium according to any one of the third aspect to the ninth aspect, in which a data length of the communication command is different for each communication standard, and the determination circuit determines the communication standard of the communication command based on the data length. 
     An eleventh aspect according to the technique of the present disclosure is the noncontact storage medium according to any one of the third aspect to the tenth aspect, in which the communication command is a special command that is used only for the determination of the communication standard by the determination circuit. 
     A twelfth aspect according to the technique of the present disclosure is the noncontact storage medium according to any one of the third aspect to the tenth aspect, in which the communication command is a polling command. 
     A thirteenth aspect according to the technique of the present disclosure is the noncontact storage medium according to any one of the first aspect to the twelfth aspect, in which the communication destination is a reader/writer that is mounted on a drive into which the magnetic tape cartridge is loaded. 
     A fourteenth aspect according to the technique of the present disclosure is a magnetic tape cartridge comprising the noncontact storage medium according to any one of the first aspect to the thirteenth aspect, and a magnetic tape, in which the noncontact storage medium stores information regarding the magnetic tape. 
     A fifteenth aspect according to the technique of the present disclosure is a method for operating a noncontact storage medium that is mounted in a magnetic tape cartridge, in which the noncontact storage medium includes an IC chip that is connected to an antenna to be coupled to a communication destination by electromagnetic induction through a magnetic field applied from the communication destination, and performs communication with the communication destination through the magnetic field, and the IC chip corresponds to a plurality of communication standards, the method comprising, with the IC chip, performing the communication selectively using the plurality of communication standards. 
     A sixteenth aspect according to the technique of the present disclosure is a program causing a computer, which is applied to a noncontact storage medium mounted in a magnetic tape cartridge, to execute a process, in which the noncontact storage medium includes an IC chip that is connected to an antenna to be coupled to a communication destination by electromagnetic induction through a magnetic field applied from the communication destination, and performs communication with the communication destination through the magnetic field, and the IC chip corresponds to a plurality of communication standards, the process comprising, with the IC chip, performing the communication selectively using the plurality of communication standards. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Exemplary embodiments of the technology of the disclosure will be described in detail based on the following figures, wherein: 
         FIG.  1    is a schematic perspective view showing an example of the appearance of a magnetic tape cartridge; 
         FIG.  2    is a schematic perspective view showing an example of the structure of a rear right end portion inside a lower case of the magnetic tape cartridge; 
         FIG.  3    is a side cross-sectional view showing an example of a support member provided on an inner surface of the lower case of the magnetic tape cartridge; 
         FIG.  4    is a schematic configuration diagram showing an example of the hardware configuration of a magnetic tape drive; 
         FIG.  5    is a schematic perspective view showing an example of an aspect in which a magnetic field is discharged from a lower side of the magnetic tape cartridge by a noncontact reading and writing device; 
         FIG.  6    is a conceptual diagram showing an example of an aspect in which a magnetic field is applied from the noncontact reading and writing device to a cartridge memory in the magnetic tape cartridge; 
         FIG.  7    is a schematic bottom view showing an example of the structure of a back surface of a substrate of the cartridge memory in the magnetic tape cartridge; 
         FIG.  8    is a schematic plan view showing an example of the structure of a front surface of the substrate of the cartridge memory in the magnetic tape cartridge; 
         FIG.  9    is a schematic circuit diagram showing an example of the circuit configuration of the cartridge memory in the magnetic tape cartridge; 
         FIG.  10    is a block diagram showing an example of the hardware configuration of a computer of an IC chip mounted on the cartridge memory in the magnetic tape cartridge; 
         FIG.  11    is a block diagram showing an example of functions of a CPU; 
         FIG.  12    is a block diagram showing an example of processing contents of the noncontact reading and writing device, a communication unit, a determination unit, and a setting unit; 
         FIG.  13    is a block diagram showing an example of processing contents of the setting unit; 
         FIG.  14    is a block diagram showing an example of processing contents of the communication unit; 
         FIG.  15    is a block diagram showing an example of processing contents of the communication unit and the setting unit; 
         FIG.  16    is a flowchart illustrating an example of a flow of communication standard setting processing; 
         FIG.  17    is a block diagram showing an example of processing contents in a case where a currently set parameter is stored in a RAM; 
         FIG.  18    is a block diagram showing an example of an aspect of a case where a communication standard is determined from a data length of a communication command; and 
         FIG.  19    is a block diagram showing an example of an aspect in which a communication standard setting program is installed on a computer from a storage medium storing the communication standard setting program. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, an example of an embodiment of a noncontact communication medium, a magnetic tape cartridge, a method for operating a noncontact storage medium, and a program according to the technique of the present disclosure will be described referring to the accompanying drawings. 
     First, terms that are used in the following description will be described. 
     CPU is an abbreviation for “Central Processing Unit”. RAM is an abbreviation for “Random Access Memory”. DRAM is an abbreviation for “Dynamic Random Access Memory”. SRAM is an abbreviation for “Static Random Access Memory”. NVM is an abbreviation for “Non-Volatile Memory”. ROM is an abbreviation for “Read Only Memory”. EEPROM is an abbreviation for “Electrically Erasable and Programmable Read Only Memory”. SSD is an abbreviation for “Solid State Drive”. USB is an abbreviation for “Universal Serial Bus”. ASIC is an abbreviation for “Application Specific Integrated Circuit”. PLD is an abbreviation for “Programmable Logic Device”. FPGA is an abbreviation for “Field-Programmable Gate Array”. SoC is an abbreviation for “System-on-a-chip”. IC is an abbreviation for “Integrated circuit”. RFID is an abbreviation for “Radio Frequency Identifier”. LTO is an abbreviation for “Linear Tape-Open”. IBM is an abbreviation for “International Business Machines Corporation”. 
     In the following description, for convenience of description, in  FIG.  1   , a loading direction of a magnetic tape cartridge  10  on a magnetic tape drive  30  (see  FIG.  4   ) is indicated by an arrow A, a direction of the arrow A is referred to a front direction of the magnetic tape cartridge  10 , and a side in the front direction of the magnetic tape cartridge  10  is referred to as a front side of the magnetic tape cartridge  10 . In the following description of the structure, “front” indicates the front side of the magnetic tape cartridge  10 . 
     In the following description, for convenience of description, in  FIG.  1   , a direction of an arrow B perpendicular to the direction of the arrow A is referred to as a right direction, and a side in the right direction of the magnetic tape cartridge  10  is referred to as a right side of the magnetic tape cartridge  10 . In the following description of the structure, “right” indicates the right side of the magnetic tape cartridge  10 . 
     In the following description, for convenience of description, in  FIG.  1   , a direction perpendicular to the direction of the arrow A and the direction of the arrow B is indicated by an arrow C, a direction of the arrow C is referred to as an upper direction of the magnetic tape cartridge  10 , and a side in the upper direction of the magnetic tape cartridge  10  is referred to as an upper side of the magnetic tape cartridge  10 . In the following description of the structure, “upper” indicates the upper side of the magnetic tape cartridge  10 . 
     In the following description, for convenience of description, in  FIG.  1   , a direction opposite to the front direction of the magnetic tape cartridge  10  is referred to as a rear direction of the magnetic tape cartridge  10 , and a side in the rear direction of the magnetic tape cartridge  10  is referred to as a rear side of the magnetic tape cartridge  10 . In the following description of the structure, “rear” indicates the rear side of the magnetic tape cartridge  10 . 
     In the following description, for convenience of description, in  FIG.  1   , a direction opposite to the upper direction of the magnetic tape cartridge  10  is referred to as a lower direction of the magnetic tape cartridge  10 , and a side in the lower direction of the magnetic tape cartridge  10  is referred to as a lower side of the magnetic tape cartridge  10 . In the following description of the structure, “lower” indicates the lower side of the magnetic tape cartridge  10 . 
     In the following description, although LTO will be described as an example as the standard of the magnetic tape cartridge  10 , this is merely an example, and other standards, such as IBM3592, may be employed. 
     As shown in  FIG.  1    as an example, the magnetic tape cartridge  10  has a substantially rectangular shape in plan view, and comprises a box-shaped case  12 . The case  12  is formed of resin, such as polycarbonate, and comprises an upper case  14  and a lower case  16 . The upper case  14  and the lower case  16  are bonded by welding (for example, ultrasonic welding) and screwing in a state in which a lower peripheral edge surface of the upper case  14  and an upper peripheral edge surface of the lower case  16  are brought into contact with each other. A bonding method is not limited to welding and screwing, and other bonding methods may be used. 
     Inside the case  12 , a cartridge reel  18  is rotatably housed. The cartridge reel  18  comprises a reel hub  18 A, an upper flange  18 B 1 , and a lower flange  18 B 2 . The reel hub  18 A is formed in a cylindrical shape. The reel hub  18 A is a shaft center portion of the cartridge reel  18 , has a shaft center direction along an up-down direction of the case  12 , and is disposed in a center portion of the case  12 . Each of the upper flange  18 B 1  and the lower flange  18 B 2  is formed in an annular shape. A center portion in plan view of the upper flange  18 B 1  is fixed to an upper end portion of the reel hub  18 A, and a center portion in plan view of the lower flange  18 B 2  is fixed to a lower end portion of the reel hub  18 A. A magnetic tape MT is wound around an outer peripheral surface of the reel hub  18 A, and an end portion in a width direction of the magnetic tape MT is held by the upper flange  18 B 1  and the lower flange  18 B 2 . 
     An opening  12 B is formed on a front side of a right wall  12 A of the case  12 . The magnetic tape MT is pulled out from the opening  12 B. 
     As shown in  FIG.  2    as an example, a cartridge memory  19  is mounted in the magnetic tape cartridge  10 . In the example shown in  FIG.  2   , the cartridge memory  19  is housed in a rear right end portion of the lower case  16 . In the present embodiment, a so-called passive type RFID tag is employed as the cartridge memory  19 . The cartridge memory  19  is an example of a “noncontact storage medium” according to the technique of the present disclosure. 
     Information (not shown) regarding the magnetic tape MT is stored in the cartridge memory  19 . Information regarding the magnetic tape MT indicates, for example, management information (not shown) for managing the magnetic tape cartridge  10 . The management information includes, for example, information regarding the cartridge memory  19 , information capable of specifying the magnetic tape cartridge  10 , and information indicating a recording capacity of the magnetic tape MT, the outline of information (hereinafter, referred to as “recorded information”) recorded on the magnetic tape MT, items of the recorded information, and a recording format of the recorded information. 
     The cartridge memory  19  performs noncontact communication with an external communication device (not shown). Examples of the external communication device include a reading and writing device that is used in a production process of the magnetic tape cartridge  10  and a reading and writing device (for example, a noncontact reading and writing device  50  shown in  FIGS.  4  to  6   ) that is used in a magnetic tape drive (for example, the magnetic tape drive  30  shown in  FIG.  4   ). 
     The external communication device performs reading and writing of various kinds of information with respect to the cartridge memory  19  in a noncontact manner. Though details will be described below, the cartridge memory  19  generates power with electromagnetic application to a magnetic field MF (see  FIG.  5   ) from the external communication device. Then, the cartridge memory  19  operates using the generated power and performs transfer of various kinds of information with the external communication device by performing communication with the external communication device through the magnetic field. 
     As shown in  FIG.  2    as an example, a support member  20  is provided on an inner surface of a bottom plate  16 A in the rear right end portion of the lower case  16 . The support member  20  is a pair of inclined mounts that supports the cartridge memory  19  from below in an inclined state. A pair of inclined mounts is a first inclined mount  20 A and a second inclined mount  20 B. The first inclined mount  20 A and the second inclined mount  20 B are disposed at an interval in a right-left direction of the case  12  and are integrated with an inner surface of a rear wall  16 B of the lower case  16  and the inner surface of the bottom plate  16 A. The first inclined mount  20 A has an inclined surface  20 A 1 , and the inclined surface  20 A 1  is inclined downward from the inner surface of the rear wall  16 B toward the inner surface of the bottom plate  16 A. The second inclined mount  20 B has an inclined surface  20 B 1 , and the inclined surface  20 B 1  is also inclined downward from the inner surface of the rear wall  16 B toward the inner surface of the bottom plate  16 A. 
     In front of the support member  20 , a pair of position restriction ribs  22  is disposed at an interval in the right-left direction. A pair of position restriction ribs  22  is provided upright on the inner surface of the bottom plate  16 A and restricts a position of a lower end portion of the cartridge memory  19  in a state of being disposed on the support member  20 . 
     As shown in  FIG.  3    as an example, a reference surface  16 A 1  is formed on an outer surface of the bottom plate  16 A. The reference surface  16 A 1  is a plane. Here, the plane indicates a surface parallel to a horizontal plane in a case where the lower case  16  is placed on the horizontal plane such that the bottom plate  16 A turns toward a lower side. Here, “parallel” indicates parallel in a meaning including an error that is generally allowed in the technical field to which the technique of the present disclosure belongs, and an error to such an extent not contrary to the spirit and scope of the technique of that the present disclosure, in addition to completely parallel. An inclination angle θ of the support member  20 , that is, an inclination angle of each of the inclined surface  20 A 1  and the inclined surface  20 B 1  (see  FIG.  2   ) is 45 degrees with respect to the reference surface  16 A 1 . The inclination angle of 45 degrees is merely an example, and may be in a range of “0 degrees&lt;inclination angle θ&lt;45 degrees”. 
     The cartridge memory  19  comprises a substrate  26 . The substrate  26  is placed on the support member  20  such that a back surface  26 A of the substrate  26  turns toward a lower side, and the support member  20  supports the back surface  26 A of the substrate  26  from below. A part of the back surface  26 A of the substrate  26  is in contact with the inclined surface of the support member  20 , that is, the inclined surfaces  20 A 1  and  20 B 1  (see  FIG.  2   ), and a front surface  26 B of the substrate  26  is exposed to an inner surface  14 A 1  side of a top plate  14 A of the upper case  14 . 
     The upper case  14  comprises a plurality of ribs  24 . A plurality of ribs  24  are disposed at intervals in the right-left direction of the case  12 . A plurality of ribs  24  are provided to protrude downward from the inner surface  14 A 1  of the top plate  14 A of the upper case  14 , and a distal end surface  24 A of each rib  24  has an inclined surface corresponding to the inclined surfaces  20 A 1  and  20 B 1  (see  FIG.  2   ). That is, the distal end surface  24 A of each rib  24  is inclined at 45 degrees with respect to the reference surface  16 A 1 . 
     In a case where the upper case  14  is bonded to the lower case  16  as described above in a state in which the cartridge memory  19  is disposed on the support member  20 , the distal end surface  24 A of each rib  24  comes into contact with the substrate  26  from the front surface  26 B side, and the substrate  26  is pinched by the distal end surface  24 A of each rib  24  and the inclined surfaces  20 A 1  and  20 B 1  of the support member  20 . With this, a position in an up-down direction of the cartridge memory  19  is restricted by the ribs  24 . 
     As shown in  FIG.  4    as an example, the magnetic tape drive  30  comprises a transport device  34 , a reading head  36 , and a control device  38 . The magnetic tape cartridge  10  is loaded into the magnetic tape drive  30 . The magnetic tape drive  30  is a device that pulls out the magnetic tape MT from the magnetic tape cartridge  10  and reads recorded information from the pulled-out magnetic tape MT using the reading head  36  by a linear scanning method. In the present embodiment, in other words, reading of the recorded information indicates reproduction of the recorded information. Here, although reading of the recorded information by the reading head  36  has been illustrated, the technique of the present disclosure is not limited thereto, and data may be written in the magnetic tape MT by a write-in head, data may be written in the magnetic tape MT or data may be read from the magnetic tape MT by a magnetic head. 
     The control device  38  controls the operation of the entire magnetic tape drive  30 . In the present embodiment, although the control device  38  is realized by an ASIC, the technique of the present disclosure is not limited thereto. For example, the control device  38  may be realized by an FPGA. Alternatively, the control device  38  may be realized by a computer including a CPU, a ROM, and a RAM. In addition, the control device  38  may be realized by combining two or more of an ASIC, an FPGA, and a computer. That is, the control device  38  may be realized by a combination of a hardware configuration and a software configuration. 
     The transport device  34  is a device that selectively transports the magnetic tape MT in a forward direction and a backward direction, and comprises a sending motor  40 , a winding reel  42 , a winding motor  44 , a plurality of guide rollers GR, and the control device  38 . 
     The sending motor  40  rotates the cartridge reel  18  in the magnetic tape cartridge  10  under the control of the control device  38 . The control device  38  controls the sending motor  40  to control a rotation direction, a rotation speed, rotation torque, and the like of the cartridge reel  18 . 
     In a case where the magnetic tape MT is wound around the winding reel  42 , the control device  38  rotates the sending motor  40  such that the magnetic tape MT runs in the forward direction. A rotation speed, rotation torque, and the like of the sending motor  40  are adjusted depending on a speed of the magnetic tape MT wound around the winding reel  42 . 
     The winding motor  44  rotates the winding reel  42  under the control of the control device  38 . The control device  38  controls the winding motor  44  to control a rotation direction, a rotation speed, rotation torque, and the like of the winding reel  42 . 
     In a case where the magnetic tape MT is wound around the winding reel  42 , the control device  38  rotates the winding motor  44  such that the magnetic tape MT runs in the forward direction. A rotation speed, rotation torque, and the like of the winding motor  44  are adjusted depending on the speed of the magnetic tape MT wound around the winding reel  42 . 
     The rotation speed, the rotation torque, and the like of each of the sending motor  40  and the winding motor  44  are adjusted in this manner, whereby tension in a predetermined range is applied to the magnetic tape MT. Here, the predetermined range indicates, for example, a range of tension obtained from a computer simulation and/or a test with a real machine as a range of tension in which data can be read from the magnetic tape MT by the reading head  36 . 
     In a case of rewinding the magnetic tape MT to the cartridge reel  18 , the control device  38  rotates the sending motor  40  and the winding motor  44  such that the magnetic tape MT runs in the backward direction. 
     In the present embodiment, although the rotation speed, the rotation torque, and the like of each of the sending motor  40  and the winding motor  44  are controlled such that the tension of the magnetic tape MT is controlled, the technique of the present disclosure is not limited thereto. For example, the tension of the magnetic tape MT may be controlled using a dancer roller or may be controlled by drawing the magnetic tape MT to a vacuum chamber. 
     Each of a plurality of guide rollers GR is a roller that guides the magnetic tape MT. A running path of the magnetic tape MT is determined by separately disposing a plurality of guide rollers GR at positions straddling over the reading head  36  between the magnetic tape cartridge  10  and the winding reel  42 . 
     The reading head  36  comprises a reading element  46  and a holder  48 . The reading element  46  is held by the holder  48  to come into contact with the magnetic tape MT during running, and reads recorded information from the magnetic tape MT transported by the transport device  34 . 
     The magnetic tape drive  30  comprises the noncontact reading and writing device  50 . The noncontact reading and writing device  50  is an example of a “communication destination” and a “reader/writer” according to the technique of the present disclosure. The noncontact reading and writing device  50  is disposed to confront the back surface  26 A of the cartridge memory  19  below the magnetic tape drive  30  in a state in which the magnetic tape cartridge  10  is loaded. The state in which the magnetic tape cartridge  10  is loaded into the magnetic tape drive  30  indicates, for example, a state in which the magnetic tape cartridge  10  reaches a position determined in advance as a position where the magnetic tape cartridge  10  starts to read the recorded information with respect to the magnetic tape MT by the reading head  36 . 
     In the example shown in  FIG.  4   , although an aspect example where the noncontact reading and writing device  50  is mounted on the magnetic tape drive  30  has been shown, the technique of the present disclosure is not limited thereto. The noncontact reading and writing device  50  is also used in a stage where the magnetic tape cartridge  10  is manufactured, a stage where the magnetic tape cartridge  10  is inspected, or a stage where the magnetic tape cartridge  10  is shipped. In this case, for example, a stationary or portable noncontact reading and writing device  50  is used. 
     As shown in  FIG.  5    as an example, the noncontact reading and writing device  50  emits a magnetic field MF from below the magnetic tape cartridge  10  toward the cartridge memory  19 . The magnetic field MF passes through the cartridge memory  19 . 
     As shown in  FIG.  6    as an example, the noncontact reading and writing device  50  is connected to the control device  38 . The control device  38  outputs a control signal for controlling the cartridge memory  19  to the noncontact reading and writing device  50 . The noncontact reading and writing device  50  emits the magnetic field MF toward the cartridge memory  19  in response to the control signal input from the control device  38 . The magnetic field MF passes through the cartridge memory  19  from the back surface  26 A side to the front surface  26 B side. 
     The noncontact reading and writing device  50  performs noncontact communication with the cartridge memory  19  to give a communication command depending on the control signal to the cartridge memory  19 . In more detail, the noncontact reading and writing device  50  spatially transmits the communication command to the cartridge memory  19  under the control of the control device  38 . The communication command is a signal indicating a command to the cartridge memory  19 . 
     Examples of the communication command include a polling command, a write-in command, and a readout command. In a case where the communication command given from the noncontact reading and writing device  50  to the cartridge memory  19  is the polling command, the cartridge memory  19  executes polling processing. The polling command may be one kind or may be a plurality of kinds, and polling processing depending on the kind is executed by the cartridge memory  19 . In a case where the communication command given from the noncontact reading and writing device  50  to the cartridge memory  19  is the write-in command, the cartridge memory  19  executes write-in processing. In a case where the communication command given from the noncontact reading and writing device  50  to the cartridge memory  19  is the readout command, the cartridge memory  19  executes readout processing. Here, for convenience of description, although one kind of command is illustrated as the polling command, a polling signal may be a plurality of kinds of signals. 
     Here, although a form example where the noncontact reading and writing device  50  spatially transmits the communication command to the cartridge memory  19  under the control of the control device  38  has been described, the technique of the present disclosure is not limited thereto. For example, in a stage where the magnetic tape cartridge  10  is manufactured, a stage where the magnetic tape cartridge  10  is inspected, or a stage where the magnetic tape cartridge  10  is shipped, the noncontact reading and writing device  50  spatially transmits the communication command to the cartridge memory  19  under the control of a control device different from the control device  38 . 
     In a case where the communication command is spatially transmitted from the noncontact reading and writing device  50  to the cartridge memory  19 , the communication command depending on an instruction from the control device  38  is included in the magnetic field MF by the noncontact reading and writing device  50 . In other words, the communication command is superimposed on the magnetic field MF by the noncontact reading and writing device  50 . That is, the noncontact reading and writing device  50  transmits the communication command to the cartridge memory  19  through the magnetic field MF under the control of the control device  38 . 
     By the way, as a communication standard that is generally known and is used in wireless communication between a cartridge memory mounted in a magnetic tape cartridge and a noncontact reading and writing device (a device called a reader/writer), there are a plurality of communication standards, such as ISO18092, ISO14443A, ISO14443B, and ISO15693. 
     Note that, in a case where there are a plurality of communication standards, since a communication standard may be different by product (for example, for each kind of magnetic tape cartridge of the related art), there is a need for mounting an IC chip corresponding to a communication standard on the cartridge memory. In regard to most of components (for example, a substrate, a wire, and a protective agent) other than the IC chip among a plurality of components used in the cartridge memory, while the same kinds of components can be used among the cartridge memories, in a case where the IC chip should be changed by product, manufacturing cost increases. 
     In view of such a situation, in the magnetic tape cartridge  10  according to the present embodiment, an IC chip  52  is mounted on the cartridge memory  19 . Hereinafter, the IC chip  52  and the periphery thereof will be described in detail. 
     The IC chip  52  and a capacitor  54  are mounted on the front surface  26 B of the cartridge memory  19 . The IC chip  52  and the capacitor  54  are bonded to the front surface  26 B. The IC chip  52  and the capacitor  54  are sealed with a sealing material  56  on the front surface  26 B of the cartridge memory  19 . Here, as the sealing material  56 , ultraviolet curable resin that is cured upon reaction with ultraviolet rays is employed. The ultraviolet curable resin is merely an example, and photocurable resin that is cured upon reaction with light in a wavelength range other than ultraviolet rays may be used as the sealing material  56 , thermosetting resin may be used as the sealing material  56 , or other adhesives may be used as the sealing material  56 . 
     As shown in  FIG.  7    as an example, a coil  60  is formed in a loop shape on the back surface  26 A of the cartridge memory  19 . The coil  60  is an example of an “antenna” according to the technique of the present disclosure. Here, as a material of the coil  60 , copper foil is employed. The copper foil is merely an example, and for example, other kinds of conductive materials, such as aluminum foil, may be used. The coil  60  induces an induced current with application of the magnetic field MF (see  FIGS.  5  and  6   ) from the noncontact reading and writing device  50 . 
     A first conduction portion  62 A and a second conduction portion  62 B are provided on the back surface  26 A of the cartridge memory  19 . The first conduction portion  62 A and the second conduction portion  62 B have solders and electrically connect both end portions of the coil  60  to the IC chip  52  (see  FIGS.  6  and  8   ) and the capacitor  54  (see  FIGS.  6  and  8   ) on the front surface  26 B. 
     As shown in  FIG.  8    as an example, on the front surface  26 B of the cartridge memory  19 , the IC chip  52  and the capacitor  54  are electrically connected to each other using a wired connection method. Specifically, one terminal of a positive electrode terminal and a negative electrode terminal of the IC chip  52  is connected to the first conduction portion  62 A through a wiring  64 A, and the other terminal is connected to the second conduction portion  62 B through a wiring  64 B. The capacitor  54  has a pair of electrodes. In the example shown in  FIG.  8   , a pair of electrodes is electrodes  54 A and  54 B. The electrode  54 A is connected to the first conduction portion  62 A through a wiring  64 C, and the electrode  54 B is connected to the second conduction portion  62 B through a wiring  64 D. With this, the IC chip  52  and the capacitor  54  are connected in parallel with the coil  60 . 
     As shown in  FIG.  9    as an example, the IC chip  52  comprises an internal capacitor  80 , a power supply circuit  82 , a computer  84 , a signal processing circuit  88 , and a magnetic field intensity measurement circuit  90 . Here, as an example of the IC chip  52 , a general-purpose IC chip that is usable for purposes other than the magnetic tape cartridge  10  is used. The general-purpose IC chip is merely an example, and an IC chip of a type that is used only for the magnetic tape cartridge  10  may be employed. 
     The cartridge memory  19  comprises a power generator  70 . The power generator  70  generates power with application of the magnetic field MF from the noncontact reading and writing device  50  to the coil  60 . Specifically, the power generator  70  generates alternating-current power using a resonance circuit  92 , converts the generated alternating-current power into direct-current power, and outputs the direct-current power. 
     The power generator  70  has the resonance circuit  92  and the power supply circuit  82 . The resonance circuit  92  comprises the capacitor  54 , the coil  60 , and the internal capacitor  80 . The internal capacitor  80  is a capacitor incorporated in the IC chip  52 , and the power supply circuit  82  is also a circuit incorporated in the IC chip  52 . The internal capacitor  80  is connected in parallel with the coil  60 . 
     The capacitor  54  is a capacitor externally attached to the IC chip  52 . The IC chip  52  is a general-use IC chip that is intrinsically usable for purposes different from the magnetic tape cartridge  10 . For this reason, the capacitance of the internal capacitor  80  is not enough to realize a resonance frequency required for the cartridge memory  19  used in the magnetic tape cartridge  10 . Accordingly, in the cartridge memory  19 , the capacitor  54  is post-attached to the IC chip  52  as a capacitor having a capacitance value necessary in making the resonance circuit  92  resonate at a resonance frequency determined in advance with the application of the magnetic field MF. The resonance frequency determined in advance is the same frequency as the frequency of the magnetic field MF, and here,  13 . 56  MHz is employed. The capacitance of the capacitor  54  is determined based on a measured value of the capacitance of the internal capacitor  80 . 
     The resonance circuit  92  generates an alternating-current power by generating a resonance phenomenon at the resonance frequency determined in advance using the induced current induced by the coil  60  with the magnetic field MF passing through the coil  60  and outputs the generated alternating-current power to the power supply circuit  82 . 
     The power supply circuit  82  has a rectifier circuit, a smoothing circuit, and the like. The rectifier circuit is a full-wave rectifier circuit having a plurality of diodes. The full-wave rectifier circuit is merely an example, and a half-wave rectifier circuit may be used. The smoothing circuit includes a capacitor and a resistor. The power supply circuit  82  converts the alternating-current power input from the resonance circuit  92  into direct-current power and supplies the converted direct-current power (hereinafter, simply referred to as “power”) to various drive elements in the IC chip  52 . Examples of various drive elements include the computer  84 , the signal processing circuit  88 , the magnetic field intensity measurement circuit  90 . In this way, power is supplied to various drive elements in the IC chip  52  by the power generator  70 , whereby the IC chip  52  operates using power generated by the power generator  70 . 
     The computer  84  is an example of a “computer that is applied to a noncontact storage medium” according to the technique of the present disclosure, and controls the entire cartridge memory  19 . 
     The signal processing circuit  88  is connected to the resonance circuit  92 . The signal processing circuit  88  has a decoding circuit (not shown) and an encoding circuit (not shown). The decoding circuit of the signal processing circuit  88  extracts and decodes a communication command from the magnetic field MF received by the coil  60  and outputs the communication command to the computer  84 . The computer  84  outputs a response signal to the communication command to the signal processing circuit  88 . That is, the computer  84  executes processing depending on the communication command input from the signal processing circuit  88  and outputs a processing result as a response signal to the signal processing circuit  88 . In the signal processing circuit  88 , in a case where the response signal is input from the computer  84 , the encoding circuit of the signal processing circuit  88  encodes the response signal to modulate the response signal and outputs the response signal to the resonance circuit  92 . The resonance circuit  92  transmits the response signal input from the encoding circuit of the signal processing circuit  88  to the noncontact reading and writing device  50  through the magnetic field MF. That is, in a case where the response signal is transmitted from the cartridge memory  19  to the noncontact reading and writing device  50 , the response signal is included in the magnetic field MF. In other words, the response signal is superimposed on the magnetic field MF. 
     The magnetic field intensity measurement circuit  90  measures the intensity of the magnetic field MF based on the power generated by the power supply circuit  82 . The power generated by the power supply circuit  82  becomes greater within a limit range as the intensity of the magnetic field MF applied to the resonance circuit  92  is greater. The magnetic field intensity measurement circuit  90  outputs a signal at a signal level depending on the power generated by the power supply circuit  82  based on a correlation between the power generated by the power supply circuit  82  and the intensity of the magnetic field MF applied to the resonance circuit  92 . That is, the magnetic field intensity measurement circuit  90  measures the power generated by the power supply circuit  82 , generates a magnetic field intensity signal indicating the intensity of the magnetic field MF based on a measurement result, and outputs the magnetic field intensity signal to the computer  84 . With this, the computer  84  can execute processing depending on the magnetic field intensity signal input from the magnetic field intensity measurement circuit  90 . 
     In this way, the IC chip  52  is connected to the coil  60  to be coupled to the noncontact reading and writing device  50  by electromagnetic induction through the magnetic field MF applied from the noncontact reading and writing device  50 , and performs communication with the noncontact reading and writing device  50  through the magnetic field MF (see  FIGS.  5  and  6   ). The IC chip  52  corresponds to a plurality of communication standards, and performs communication with the noncontact reading and writing device  50  selectively using a plurality of communication standards. Here, a plurality of communication standards indicate, for example, ISO18092, ISO14443A, ISO1443B, and ISO15693. The noncontact reading and writing device  50  has any of a plurality of communication standards. That is, while the noncontact reading and writing device  50  is not limited as being mounted only on the magnetic tape drive  30  shown in  FIG.  4   , a plurality of noncontact reading and writing devices  50  are also present in a manufacturing process, an inspection process, and the like, and each noncontact reading and writing device  50  has any of a plurality of communication standards. 
     As shown in  FIG.  10    as an example, the computer  84  comprises a CPU  94 , an NVM  96 , and a RAM  98 . The CPU  94 , the NVM  96 , and the RAM  98  are connected to a bus  100 . 
     The CPU  94  controls the operation of the computer  84 . The NVM  96  is an example of a “non-volatile memory” according to the technique of the present disclosure. An example of the NVM  96  is an EEPROM. The EEPROM is merely an example, and for example, a ferroelectric memory may be used instead of the EEPROM or any memory may be used as long as the memory is a non-volatile memory that can be mounted on the IC chip  52 . The RAM  98  is an example of a “volatile memory” according to the technique of the present disclosure. The RAM  98  temporarily stores various kinds of information and is used as a work memory. An example of the RAM  98  is a DRAM or an SRAM. 
     The NVM  96  has a plurality of storage blocks including a settable parameter storage block  102 , a currently set parameter storage block  104 , and a program storage block  106 . Management information (not shown) and the like are stored in the plurality of storage blocks. 
     A plurality of communication standard parameters  108  that are able to specify communication standards settable in the IC chip  52  are stored in the settable parameter storage block  102 . A currently set parameter  110  is stored in the currently set parameter storage block  104 . The currently set parameter  110  is a communication standard parameter  108  corresponding to a communication standard currently set in the IC chip  52  among a plurality of communication standard parameters  108 . 
     A communication standard setting program  112  is stored in the program storage block  106 . The communication standard setting program  112  is an example of a “program” according to the technique of the present disclosure. A plurality of communication standard-dedicated programs  114  are also stored in the program storage block  106 . A plurality of communication standard-dedicated programs  114  correspond to a plurality of communication standard parameters  108  on a one-to-one basis. The CPU  94  reads out the communication standard-dedicated program  114  corresponding to the currently set parameter  110  stored in the currently set parameter storage block  104  from the program storage block  106  and executes the read-out program storage block  106  to realize communication in the communication standard corresponding to the currently set parameter  110  stored in the currently set parameter storage block  104 . 
     The communication standard that is specified from the currently set parameter  110  stored in the currently set parameter storage block  104  is the communication standard currently set in the IC chip  52 . That is, the CPU  94  executes the communication standard-dedicated program  114  corresponding to the currently set parameter  110  stored in the currently set parameter storage block  104 , whereby the IC chip  52  can perform communication with the noncontact reading and writing device  50  in the currently set communication standard through the coil  60  ( FIG.  9   ). 
     As shown in  FIG.  11    as an example, the CPU  94  reads out the communication standard setting program  112  from the NVM  96  and executes the read-out communication standard setting program  112  on the RAM  98 . The CPU  94  operates as a communication unit  94 A, a determination unit  94 B, and a setting unit  94 C following the communication standard setting program  112  that is executed on the RAM  98 , to execute communication standard setting processing see ( FIG.  16   ) described below. 
     As shown in  FIG.  12    as an example, the noncontact reading and writing device  50  applies a magnetic field MF (see  FIGS.  5  and  6   ) to the coil  60  to be coupled to the coil  60  by electromagnetic induction. In a case where the noncontact reading and writing device  50  and the coil  60  are coupled by electromagnetic induction, the noncontact reading and writing device  50  transmits the polling command as the communication command to the communication unit  94 . The communication unit  94 A receives the polling command from the noncontact reading and writing device  50  through the coil  60 . The determination unit  94 B is an example of a “determination circuit” according to the technique of the present disclosure, and determines a communication standard of the polling command received by the communication unit  94 A through the coil  60 . The setting unit  94 C selects a communication standard depending on the determination result in the determination unit  94 B from a plurality of communication standards and sets the communication standard as an adaptive communication standard. The adaptive communication standard indicates a communication standard that is most adapted to communication with the noncontact reading and writing device  50 . The communication standard that is most adapted to communication with the noncontact reading and writing device  50  indicates, for example, a communication standard conforming to the communication standard of the polling command given from the noncontact reading and writing device  50  to the cartridge memory  19  among a plurality of communication standards. 
     As shown in  FIG.  13    as an example, the setting unit  94 C acquires the communication standard parameter  108  corresponding to the communication standard depending on the determination result in the determination unit  94 B, that is, the communication standard parameter  108  corresponding to the adaptive communication standard, from the settable parameter storage block  102 . Then, the setting unit  94 C overwrites and saves the communication standard parameter  108  acquired from the settable parameter storage block  102  in the currently set parameter storage block  104  to update the currently set parameter  110  in the currently set parameter storage block  104 . That is, the currently set parameter  110  in the currently set parameter storage block  104  is rewritten to the currently set parameter  110  by the setting unit  94 C, so that the currently set parameter  110  in the currently set parameter storage block  104  is updated. 
     The communication standard that is specified from the currently set parameter  110  stored in the currently set parameter storage block  104  is the communication standard currently set in the IC chip  52 . The setting of the communication standard of the IC chip  52  is changed with the rewriting of the currently set parameter  110  in the currently set parameter storage block  104  by the setting unit  94 C. 
     As shown in  FIG.  14    as an example, the communication unit  94 A acquires the currently set parameter  110  from the currently set parameter storage block  104 . Then, the communication unit  94 A reads out the communication standard-dedicated program  114  corresponding to the currently set parameter  110  acquired from the currently set parameter storage block  104 , from the program storage block  106  and executes the read-out communication standard-dedicated program  114 . 
     The communication unit  94 A acquires the magnetic field intensity signal from the magnetic field intensity measurement circuit  90  and determines whether or not power of the IC chip  52 , that is, power for driving the IC chip  52  is in short, from the acquired magnetic field intensity signal. Then, the communication unit  94 A executes the communication standard-dedicated program  114  read out from the program storage block  106  until a predetermined condition is satisfied. That is, the communication unit  94 A skips the determination by the determination unit  94 B and continues to execute the communication standard-dedicated program  114  read out from the program storage block  106  until the predetermined condition is satisfied. The wording “until the predetermined condition is satisfied” indicates, for example, “until the power for driving the IC chip  52  is in short”. The setting unit  94 C executes the communication standard-dedicated program  114  corresponding to the currently set parameter  110  to communicate with the noncontact reading and writing device  50  in the communication standard corresponding to the currently set parameter  110  through the coil  60 . 
     Here, the wording “the power is in short” indicates, for example, a signal level of the magnetic field intensity signal acquired from the magnetic field intensity measurement circuit  90  is less than a predetermined level. The predetermined level is, for example, a signal level of the magnetic field intensity signal corresponding to power with which stable communication cannot be performed between the IC chip  52  and the noncontact reading and writing device  50 , and is a fixed value derived in advance by a test with a real machine and/or a computer simulation. Here, although the fixed value is illustrated as the predetermined level, the predetermined level may be a variable value that is changed depending on an instruction (for example, a command) given from the outside and/or an operation state of the IC chip  52 . 
     The setting unit  94 C communicates the noncontact reading and writing device  50  in the communication standard corresponding to the currently set parameter  110  through the coil  60  to transmits the response signal corresponding to the communication command for which the communication standard is determined by the determination unit  94 B (see  FIG.  12   ), to the noncontact reading and writing device  50 . In this case, first, the setting unit  94 C decodes the communication command (in the example shown in  FIG.  12   , the polling command) for which the communication standard is determined by the determination unit  94 B. Then, the setting unit  94 C transmits a response signal corresponding to a command obtained by decoding the communication command to the noncontact reading and writing device  50  using the currently set communication standard (adaptive communication standard) through the magnetic field MF. 
     As shown in  FIG.  15    as an example, the communication unit  94 A acquires the magnetic field intensity signal from the magnetic field intensity measurement circuit  90  and determines whether or not the power in the IC chip  52  is in short, from the acquired magnetic field intensity signal. Then, the communication unit  94 A erases the currently set parameter  110  corresponding to the currently set parameter  110  in the currently set parameter storage block  104 , that is, the adaptive communication standard from the currently set parameter storage block  104  under a condition that the power in the IC chip  52  is in short. With this, the setting of the adaptive communication standard in the IC chip  52  is released, and the communication unit  94 A ends communication with the noncontact reading and writing device  50 . 
     Next, the operations of a cartridge memory  19  according to the embodiment will be described referring to  FIG.  16   . 
       FIG.  16    shows an example of a flow of communication standard setting processing that is executed by the CPU  94  in a case where the magnetic tape cartridge  10  is loaded into the magnetic tape drive  30 , so that the cartridge memory  19  and the noncontact reading and writing device  50  are coupled by electromagnetic induction and power for driving is supplied to the IC chip  52 . The flow of the communication standard setting processing shown in  FIG.  16    is an example of a “method for operating a noncontact storage medium” according to the technique of the present disclosure. 
     Here, although a form example where the communication standard setting processing is executed by the CPU  94  in a state in which the magnetic tape cartridge  10  is loaded into the magnetic tape drive  30 , the technique of the present disclosure is not limited thereto. For example, the communication standard setting processing may be executed by the CPU  94  in a work stage by the vendor of the magnetic tape cartridge  10 , such as a stage where the magnetic tape cartridge  10  is inspected or a stage where the magnetic tape cartridge  10  is shipped. 
     In the communication standard setting processing shown in  FIG.  16   , first, in Step ST 100 , the communication unit  94 A determines whether or not the polling command from the noncontact reading and writing device  50  is received by the coil  60 . In Step ST 100 , in a case where the polling command is not received by the coil  60 , determination is made to be negative, and the determination in Step ST 100  is performed again. In Step ST 100 , in a case where the polling command is received by the coil  60 , determination is made to be affirmative, and the communication standard setting processing proceeds to Step ST 102 . 
     In Step ST 102 , the determination unit  94 B determines the communication standard of the polling command received in Step ST 100 . 
     In next Step ST 104 , the setting unit  94 C acquires the communication standard parameter  108  depending on the determination result in Step ST 102  from the settable parameter storage block  102 . 
     In next Step ST 106 , the setting unit  94 C overwrites and saves the communication standard parameter  108  acquired in Step ST 104  in the currently set parameter storage block  104  to update the currently set parameter  110  in the currently set parameter storage block  104 . 
     In next Step ST 108 , the communication unit  94 A acquires the currently set parameter  110  from the currently set parameter storage block  104  and executes the communication standard-dedicated program  114  corresponding to the acquired currently set parameter  110  to start communication with the noncontact reading and writing device  50  in the communication standard corresponding to the currently set parameter  110  through the coil  60 . 
     In next Step ST 110 , the communication unit  94 A decodes the communication command received in Step ST 110  or Step ST 116  described below. 
     In next Step ST 112 , the communication unit  94 A transmits a response signal corresponding to a decoding result in Step ST 110  to the noncontact reading and writing device  50 . That is, a signal indicating a result obtained by the CPU  94  executing processing depending on a command obtained by decoding the communication command is transmitted as the response signal to the noncontact reading and writing device  50 . 
     In next Step ST 114 , the communication unit  94 A determines whether or not the power in the IC chip  52  is in short, based on the magnetic field intensity signal from the magnetic field intensity measurement circuit  90 . In Step ST 114 , in a case where the power in the IC chip  52  is not in short, determination is made to be negative, and the communication standard setting processing proceeds to Step ST 116 . In Step ST 114 , in a case where the power in the IC chip  52  is in short, determination is made to be affirmative, and the communication standard setting processing proceeds to Step ST 118 . 
     In Step ST 116 , the communication unit  94 A determines whether or not the command transmitted from the noncontact reading and writing device  50  is received by the coil  60 . In Step ST 116 , in a case where the command that is transmitted from the noncontact reading and writing device  50  is not received by the coil  60 , determination is made to be negative, and the communication standard setting processing proceeds to Step ST 114 . In Step ST 116 , in a case where the communication command that is transmitted from the noncontact reading and writing device  50  is received by the coil  60 , determination is made to be affirmative, and the communication standard setting processing proceeds to Step ST 110 . 
     In Step ST 118 , the setting unit  94 C erases the currently set parameter  110  from the currently set parameter storage block  104  to release the communication standard corresponding to the currently set parameter  110 , that is, the currently set communication standard. 
     In next Step ST 120 , the communication unit  94 A ends communication with the noncontact reading and writing device  50 , and thereafter, the communication standard setting processing ends. 
     As described above, in the cartridge memory  19 , the IC chip  52  corresponds to a plurality of communication standards, and performs communication with the noncontact reading and writing device  50  selectively using a plurality of communication standards. Therefore, according to this configuration, compared to a case where the IC chip of the cartridge memory mounted in the magnetic tape cartridge performs noncontact communication with the noncontact reading and writing device using only one communication standard, it is possible to allow the cartridge memory  19  mounted in the magnetic tape cartridge  10  to perform noncontact communication with the noncontact reading and writing devices  50  of various communication standards. 
     In the cartridge memory  19 , while the noncontact reading and writing device  50  is not limited as being mounted only on the magnetic tape drive  30  shown in  FIG.  4   , a plurality of noncontact reading and writing devices  50  are also present in the manufacturing process, the inspection process, and the like, and each noncontact reading and writing device  50  has any of a plurality of communication standards. Therefore, according to this configuration, even though the noncontact reading and writing device  50  has any communication standard among a plurality of communication standards, it is possible to realize noncontact communication between the cartridge memory  19  and the noncontact reading and writing device  50 . 
     In the cartridge memory  19 , the communication standard of the communication command given from the noncontact reading and writing device  50  to the IC chip  52  is determined by the determination unit  94 B. Then, the IC chip  52  performs communication with the noncontact reading and writing device  50  using the adaptive communication standard that is the communication standard selected depending on the determination result in the determination unit  94 B from a plurality of communication standards. Therefore, according to this configuration, it is possible to allow the cartridge memory  19  to perform communication with the noncontact reading and writing device  50  in the communication standard conforming to the communication standard of the noncontact reading and writing device  50 . 
     In the cartridge memory  19 , the communication unit  94 A decodes the communication command for which the communication standard is determined by the determination unit  94 B, and transmits the response signal corresponding to the decoding result to the noncontact reading and writing device  50  using the adaptive communication standard through the magnetic field MF. Therefore, according to this configuration, compared to a case where a communication standard other than the adaptive communication standard is set in the IC chip  52 , it is possible to transmit the response signal depending on the communication command to the noncontact reading and writing device  50  with high accuracy. 
     In the cartridge memory  19 , the communication unit  94 A performs communication with the noncontact reading and writing device  50  using the adaptive communication standard until the predetermined condition is satisfied. Therefore, according to this configuration, it is possible to allow the cartridge memory  19  to continue communication with the noncontact reading and writing device  50  while the predetermined condition is not satisfied. 
     In the cartridge memory  19 , the communication unit  94 A performs communication with the noncontact reading and writing device  50  using the adaptive communication standard until a condition that the power for driving the IC chip  52  is in short is satisfied. Therefore, according to this configuration, it is possible to allow the cartridge memory  19  to continue communication with the noncontact reading and writing device  50  while the power for driving the IC chip  52  is not in short. 
     In the cartridge memory  19 , the currently set parameter  110  is erased from the currently set parameter storage block  104  by the setting unit  94 C under a condition that the power for driving the IC chip  52  is in short. With this, the adaptive communication standard that is currently set in the IC chip  52  is released. Therefore, according to this configuration, it is possible to change the adaptive communication standard set in the IC chip  52  with a shortage of the power for driving the IC chip  52  as a trigger. 
     In the cartridge memory  19 , the determination by the determination unit  94 B is skipped until the predetermined condition is satisfied (for example, until the power for driving the IC chip  52  is in short). That is, the determination by the determination unit  94 B is not performed until the predetermined condition is satisfied. Therefore, according to this configuration, it is possible to reduce a processing load required for the determination, compared to a case where the determination by the determination unit  94 B is constantly performed. It is also possible to reduce a time required from when the communication command is received to when the response signal is transmitted, as much as the determination by the determination unit  94 B is not performed. In other words, a response time from when the communication command is transmitted from the noncontact reading and writing device  50  to when the response signal is transmitted from the cartridge memory  19  to the noncontact reading and writing device  50  is reduced. 
     In the cartridge memory  19 , the communication standard of the polling command given from the noncontact reading and writing device  50  is determined by the determination unit  94 B, the communication standard selected depending on the determination result is set as the adaptive communication standard, and communication is performed between the cartridge memory  19  and the noncontact reading and writing device  50  in the set adaptive communication standard. Therefore, according to this configuration, it is possible to quickly establish communication between the cartridge memory  19  and the noncontact reading and writing device  50 , compared to a case where a communication standard of a communication command (for example, write-in command or readout command) that is given from the noncontact reading and writing device  50  to the cartridge memory  19  later than the polling command is determined by the determination unit  94 B. 
     In the cartridge memory  19 , communication is performed between the noncontact reading and writing device  50  mounted on the magnetic tape drive  30  and the IC chip  52  selectively using a plurality of communication standards. Therefore, according to this configuration, in a case where the noncontact reading and writing device  50  that is mounted on the magnetic tape drive  30  has any communication standard among a plurality of communication standards, it is possible to allow the IC chip  52  to perform communication with the noncontact reading and writing device  50  in the communication standard of the noncontact reading and writing device  50 . 
     In the above-described embodiment, although a form example where the currently set parameter  110  is stored in the currently set parameter storage block  104  of the NVM  96  has been described, the technique of the present disclosure is not limited thereto. For example, as shown in  FIG.  17   , the currently set parameter  110  may be stored (overwritten and saved) in the RAM  98 , instead of the currently set parameter storage block  104  of the NVM  96 . The RAM  98  is a volatile memory. For example, in a case where the power in the IC chip  52  is in short due to weakening of the intensity of the magnetic field MF or the like (for example, predetermined power (for example, zero) as power for data loss from the RAM  98  is reached), the currently set parameter  110  in the RAM  98  is erased. Accordingly, the processing of Step ST 116  of  FIG.  16    is not required, and as a result, a processing load by the CPU  94  is reduced. 
     In the above-described embodiment, although a form example where the determination unit  94 B determines the communication standard of the polling command has been described, the technique of the present disclosure is not limited thereto. For example, as shown in  FIG.  18   , data lengths of a plurality of kinds of communication commands may be different for each communication standard (in an example shown in  FIG.  18   , each of first to four communication standards), and the determination unit  94 B may determine a communication standard of a communication command based on the data length. With this, a communication standard is specified even though details of a communication command are not analyzed. Therefore, according to this configuration, it is possible to reduce a time required from the reception of the communication command to the setting of the adaptive communication standard, compared to a case where details of a communication command are analyzed to specify a communication standard. 
     As shown in  FIG.  18    as an example, a communication command that is a determination target of a communication standard by the determination unit  94 B may be a special command that is used only for determination of a communication standard by the determination unit  94 B. In this case, it is possible to simplify processing required for determining a communication standard of a communication command, compared to a case where many kinds of communication commands are a determination target of a communication standard by the determination unit  94 B. 
     In the above-described embodiment, although the communication unit  94 A performs communication with the noncontact reading and writing device  50  using the adaptive communication standard until the power for driving the IC chip  52  is in short, the technique of the present disclosure is not limited thereto. For example, the communication unit  94 A may perform communication with the noncontact reading and writing device  50  using the adaptive communication standard until a specific instruction (for example, an instruction to end communication) is given from the outside, or the communication unit  94 A may perform communication with the noncontact reading and writing device  50  using the adaptive communication standard until an operation state of the IC chip  52  reaches a specific operation state (for example, an operation speed of the CPU  94  is less than a predetermined speed). 
     In the above-described embodiment, although a form example where the communication standard setting program  112  is stored in the NVM  96  has been described, the technique of the present disclosure is not limited thereto. For example, as shown in  FIG.  19   , the communication standard setting program  112  may be stored in a storage medium  200 . 
     The storage medium  200  is a non-transitory storage medium. An example of the storage medium  200  is any portable storage medium, such as an SSD or a USB memory. The communication standard setting program  112  that is stored in the storage medium  200  is installed on the computer  84 . The CPU  94  executes the communication standard setting processing following the communication standard setting program  112 . In an example shown in  FIG.  19   , the CPU  94  is a single CPU, but may be a plurality of CPUs. 
     The communication standard setting program  112  may be stored in a storage device of another computer, a server apparatus, or the like connected to the computer  84  through a communication network (not shown), and the communication standard setting program  112  may be downloaded depending on a request from the cartridge memory  19  and may be installed on the computer  84 . 
     In the example shown in  FIG.  19   , although the computer  84  has been illustrated, the technique of the present disclosure is not limited thereto, and a device including an ASIC, an FPGA, or a PLD may be applied instead of the computer  84 . Alternatively, a combination of a hardware configuration and a software configuration may be used instead of the computer  84 . 
     As a hardware resource that executes the communication standard setting processing, various processors described below can be used. Examples of the processors include a CPU that is a general-use processor executing software, that is, a program to function as a hardware resource that executes the communication standard setting processing. Examples of the processors include a dedicated electric circuit that is a processor, such as an FPGA, a PLD, or an ASIC, having a circuit configuration dedicatedly designed for executing specific processing. A memory is incorporated in or connected to any processor, and any processor uses the memory to execute the communication standard setting processing. 
     The hardware resource that executes the communication standard setting processing may be configured of one of various processors or may be configured of a combination of two or more processors (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA) of the same type or different types. The hardware resource that executes the communication standard setting processing may be one processor. 
     As an example where the hardware resource is configured of one processor, first, there is a form in which one processor is configured of a combination of one or more CPUs and software, and the processor functions as the hardware resource executing the communication standard setting processing. Second, as represented by SoC or the like, there is a form in which a processor that realizes the function of the entire system including a plurality of hardware resources executing the communication standard setting processing with one IC chip is used. In this way, the communication standard setting processing is realized using one or more of various processors described above as the hardware resource. 
     In addition, as the hardware structures of various processors, more specifically, an electric circuit into which circuit elements, such as semiconductor elements, are combined can be used. The above-described communication standard setting processing is merely an example. Accordingly, it is needless to say that unnecessary steps may be deleted, new steps may be added, or a processing order may be changed without departing from the gist. 
     The content of the above description and the content of the drawings are detailed description of portions according to the technique of the present disclosure, and are merely examples of the technique of the present disclosure. For example, the above description relating to configuration, function, operation, and advantageous effects is description relating to configuration, function, operation, and advantageous effects of the portions according to the technique of the present disclosure. Thus, it is needless to say that unnecessary portions may be deleted, new elements may be added, or replacement may be made to the content of the above description and the content of the drawings without departing from the gist of the technique of the present disclosure. Furthermore, to avoid confusion and to facilitate understanding of the portions according to the technique of the present disclosure, description relating to common technical knowledge and the like that does not require particular description to enable implementation of the technique of the present disclosure is omitted from the content of the above description and the content of the drawings. 
     In the specification, “A and/or B” is synonymous with “at least one of A or B”. That is, “A and/or B” may refer to A alone, B alone, or a combination of A and B. Furthermore, in the specification, a similar concept to “A and/or B” applies to a case in which three or more matters are expressed by linking the matters with “and/or”. 
     All cited documents, patent applications, and technical standards described in the specification are incorporated by reference in the specification to the same extent as in a case where each individual cited document, patent application, or technical standard is specifically and individually indicated to be incorporated by reference.