JP5770033B2 - Piezoelectric device - Google Patents

Description

  The present invention relates to a piezoelectric device such as a crystal oscillator and a semiconductor component such as an IC for the piezoelectric device.

  Piezoelectric devices such as crystal oscillators have been improved in functionality, and the number of terminals through which signals are input and output has increased with the increase in functionality. For example, Patent Document 1 discloses an oscillator that can turn on / off an amplifier circuit that amplifies an oscillation signal and change the frequency of a vibrator by inputting a signal from a terminal. . For example, Patent Document 2 discloses an oscillator having two terminals for outputting two oscillation signals.

JP 2009-44608 A JP 2009-267887 A

  In such highly functional piezoelectric devices, the arrangement of terminals corresponding to each function differs depending on the user. Therefore, if a piezoelectric device having a different correspondence between the function and the terminal position for each user is manufactured, many types of piezoelectric devices or semiconductor parts for the piezoelectric device must be manufactured. Requires development costs. Moreover, since it tends to become a small quantity and many kinds, productivity is low and cost reduction becomes difficult.

  An object of the present invention is to provide a piezoelectric device and a semiconductor component for a piezoelectric device that can appropriately meet a user's request regarding terminal arrangement.

  A piezoelectric device according to an aspect of the present invention includes a piezoelectric body, a semiconductor component that performs signal processing using the piezoelectric body, a base body that holds the piezoelectric body and the semiconductor component, and the semiconductor body. And a plurality of terminals including a first predetermined number (where the first predetermined number is 2 or more) connected to the component, the semiconductor component based on the terminal control signal A setting unit configured to select a terminal for outputting or receiving an input / output signal from the first predetermined number of selection terminals;

  Preferably, the setting unit assigns a plurality of the input / output signals to the first predetermined number of selection terminals based on the terminal control signal.

  Preferably, the setting unit determines that the second predetermined number is less than the first predetermined number and the second predetermined number from the second predetermined number (where the second predetermined number is 2 or more) based on the terminal control signal. A third predetermined number of input / output signals less than the number is selected, and a terminal for outputting or receiving the selected third predetermined number of input / output signals is selected from the first predetermined number of selection terminals.

  Preferably, the semiconductor component includes a first output unit capable of outputting a first oscillation signal based on the vibration of the piezoelectric body through any of the plurality of terminals, and a second oscillation based on the vibration of the piezoelectric body. A second output unit capable of outputting a signal via any of the plurality of terminals, a temperature sensor capable of outputting a temperature signal according to an ambient temperature, and the piezoelectric body due to a temperature change based on the temperature signal And the second predetermined number of input / output signals include the second oscillation signal and the temperature signal.

  Preferably, the semiconductor component includes a memory that holds correction data referred to by the temperature compensation circuit and control data referred to when generating the terminal control signal.

  Preferably, the setting unit selects the third predetermined number of input / output signals selected based on the terminal control signal and a fourth predetermined number that is not selected / deselected (however, the third predetermined number). The sum of the number and the fourth predetermined number is equal to or less than the first predetermined number) input / output signals are assigned to the first predetermined number of selection terminals.

  Preferably, the sum of the third predetermined number and the fourth predetermined number is equal to the first predetermined number.

  Preferably, the semiconductor component permits power supply to an amplifying unit that amplifies an oscillation signal based on vibration of the piezoelectric body based on a drive control signal input via any of the plurality of terminals. A drive control unit to be prohibited, and a frequency adjustment unit that changes the frequency of the piezoelectric body based on a frequency adjustment signal input via any of the plurality of terminals, and the fourth predetermined number of The input / output signal includes the drive control signal and the frequency adjustment signal.

  Preferably, the terminal control signal includes a first control signal and a second control signal, and the semiconductor component outputs or receives the second predetermined number of input / output signals. And the fourth predetermined number of second function units that output or receive the fourth predetermined number of input / output signals, and the setting unit transmits the third predetermined number of input / output signals. 3 predetermined number of intermediate lines, the second predetermined number of first function units, a switch unit that switches connection between the third predetermined number of intermediate lines, the third predetermined number of intermediate lines, and the fourth predetermined number A plurality of second function units and a selection unit that switches connection between the first predetermined number of selection terminals.

  Preferably, the setting unit is configured to output input / output signals to / from a fifth predetermined number (where the fifth predetermined number is 1 or more) other than the first predetermined number of selection terminals included in the plurality of terminals. Do not assign.

  A semiconductor component for a piezoelectric device of one embodiment of the present invention is a semiconductor component that performs signal processing using a piezoelectric body, and outputs or receives a predetermined input / output signal based on a plurality of terminals and a terminal control signal. And a setting unit that selects the plurality of terminals from the plurality of terminals.

  According to said structure, it can respond suitably to the user's request regarding terminal arrangement | positioning.

1A and 1B are external perspective views of an oscillator according to an embodiment of the present invention. Sectional drawing of the II-II line | wire of FIG. The block diagram which shows the structure of the signal processing system of the oscillator of FIG. FIG. 4 is a block diagram showing details of a part of FIG. 3. The figure which illustrates the relationship between the content of control data, and the signal allocated to each terminal.

  Hereinafter, an oscillator according to an embodiment of the present invention will be described with reference to the drawings.

  In addition, about the same or similar structure, the same code | symbol may be attached | subjected. In this case, “terminal 5” is “first terminal 5A”, “second terminal 5B”, etc., and a number is added to the beginning of the name, and an uppercase alphabet is added to the reference symbol, so that they are similar or similar to each other. May be distinguished from each other.

  FIG. 1A is an external perspective view of an oscillator 1 according to an embodiment of the present invention, and FIG. 1B is an external perspective view of the oscillator 1 viewed from the opposite direction to FIG. .

  Note that the oscillator 1 may have either direction upward or downward, but in the following embodiments, for convenience, the orthogonal coordinate system xyz is defined and the positive side in the z direction is defined as the upward direction. In addition, terms such as “upper surface” and “lower surface” may be used.

  The oscillator 1 includes, for example, a base 3, first terminals 5 </ b> A to 6 </ b> F exposed from the base 3, and a data input unit 7 exposed from the base 3.

  The base body 3 is formed in, for example, a generally thin rectangular parallelepiped shape. For example, the plurality of terminals 5 are arranged along the outer periphery of the lower surface 3 b on the lower surface 3 b of the base 3. The data input part 7 is arrange | positioned at the side surface 3c of the base | substrate 3, for example. The plurality of terminals 5 and the data input unit 7 are formed of, for example, a conductive layer superimposed on the surface of the base 3.

  The plurality of terminals 5 include a third terminal 5C, a fourth terminal 5D, and a sixth terminal 5F to which signals to be input or signals to be output are fixed (hereinafter, these three terminals may be referred to as “fixed terminals 5”). And the first terminal 5A, the second terminal 5B, and the fifth terminal 5E (hereinafter, these three terminals 5 are referred to as “selection terminals 5”). Is included.) Specifically, for example, it is as follows.

  The third terminal 5C is a terminal to which a reference potential (reference potential signal GND) is applied, and the sixth terminal 5F is a terminal to which a potential (drive potential signal Vcc) different from the reference potential is applied. That is, the oscillator 1 is supplied with DC power via the third terminal 5C and the sixth terminal 5F.

  The fourth terminal 5D is a terminal for outputting the first oscillation signal Out1 generated by the oscillator 1. The first oscillation signal Out1 is a wave-like signal (including a pulse-like signal) whose potential changes at a constant frequency.

  Any one of the second oscillation signal Out2 and the temperature signal T, the drive control signal E / D, and the frequency adjustment signal Vcon is assigned to each of the selection terminals 5 (5A, 5B, and 5E). It is done.

  The second oscillation signal Out2 is a wave-like signal (including a pulse-like signal) generated by the oscillator 1 and having a potential that changes at a constant frequency. The second oscillation signal Out2 may be the same signal as the first oscillation signal Out1, all or part of the frequency, waveform, and phase, or may be a signal that is different from all other. The temperature signal T is a signal including information related to the temperature of the oscillator 1 generated by the oscillator 1. The drive control signal E / D is a signal that is input to the oscillator 1 to control the output of the first oscillation signal Out1 and the like from the oscillator 1 and the stop thereof. The frequency adjustment signal Vcon is a signal input to the oscillator 1 in order to control the frequency of the first oscillation signal Out1 and the second oscillation signal Out2.

  The data input unit 7 is a terminal for inputting various data and rewriting the contents of a memory described later. The data rewritten by the data input unit 7 includes, for example, data for setting which of the second oscillation signal Out2 and the temperature signal T is output from the oscillator 1, and one of the second oscillation signal Out2 and the temperature signal T. Data for setting which signal, drive control signal E / D, and frequency adjustment signal Vcon to be assigned to which selection terminal 5 is included.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  The base 3 includes, for example, a container 9 in which a first recess 9a and a second recess 9b are formed, a lid 11 that closes the first recess 9a, and a resin portion 13 that is filled in the second recess 9b. Yes. The vibrator 14 is accommodated in the first recess 9a, and the semiconductor component 17 is accommodated in the second recess 9b.

  Although not particularly shown, the container 9 is configured by, for example, laminating a plurality of substrates made of an insulating material such as ceramic in the z direction. The first concave portion 9a and the second concave portion 9b are configured by openings formed in the substrate, and are concave in opposite directions in the z direction. A pad 20 for mounting the vibrator 14 is formed on the bottom surface of the first recess 9a. A pad 23 for mounting the semiconductor component 17 is formed on the bottom surface of the second recess 9b. A wiring 10 for connecting the vibrator 14 and the semiconductor component 17 and connecting the semiconductor component 17 and the terminal 5 is formed inside the container 9.

  The lid 11 is a flat plate made of a metal such as 42 alloy, for example, and is bonded to the container 9 via a sealing material (not shown). The resin portion 13 is formed by filling and curing a molten resin after the semiconductor component 17 is mounted on the second recess 9b. In addition, the height from the bottom part of the 2nd recessed part 9b of the resin part 13 may be set suitably.

  The vibrator 14 includes a piezoelectric body 15 such as a crystal formed in a flat plate shape, and electrodes 16 provided on both main surfaces of the piezoelectric body 15. The vibrator 14 is fixed and connected to the pad 20 by a conductive adhesive 19.

  The semiconductor component (integrated circuit element) 17 has, for example, a substantially rectangular parallelepiped shape, and a pad 21 is formed on the main surface facing the bottom surface of the second recess 9b. The pad 21 is fixed and connected to a pad 23 provided on the container 9 by a bump 25.

  The plurality of pads 21 include one for connecting the semiconductor component 17 to the vibrator 14 and one for connecting the semiconductor component 17 to the terminal 5 of the oscillator 1. Hereinafter, among the plurality of pads 21, those corresponding to the first terminal 5 </ b> A to the sixth terminal 5 </ b> F are denoted by “first”, “A”, and the like, similarly to the first terminal 5 </ b> A to sixth terminal 5 </ b> F. Sometimes.

  FIG. 3 is a block diagram showing the configuration of the signal processing system of the oscillator 1.

  As described above, the oscillator 1 includes the vibrator 14 and the semiconductor component 17. The first pad 21A to the sixth pad 21F of the semiconductor component 17 are connected to the first terminal 5A to the sixth terminal 5F. Note that the third terminal 5C and the sixth terminal 5F for supplying power are connected to various functional units in the oscillator 1, and FIG. 3 shows only a part of the connections.

  The semiconductor component 17 includes an oscillation circuit 27 that generates an oscillation signal, a first buffer 29A and a second buffer 29B that output the generated oscillation signal, and a drive control unit 31 that controls driving of the buffer 29. ing.

  Further, the semiconductor component 17 includes a temperature sensor 33 and a temperature compensation circuit 35 that compensates for a frequency change of the vibrator 14 caused by a temperature change according to a detection result of the temperature sensor 33.

  Further, the semiconductor component 17 has either the second oscillation signal Out2 or the temperature signal T, the drive control signal E / D, and the first terminal 5A, the second terminal 5B, and the fifth terminal 5E. A setting unit 37 to which the frequency adjustment signal Vcon is assigned and a memory 39 referred to by the setting unit 37 and the temperature compensation circuit 35 are provided.

  The oscillation circuit 27 includes, for example, an inverter 41 whose input side and output side are connected to the vibrator 14, a first capacitive element 43 </ b> A disposed between the input side of the inverter 41 and the reference potential unit, and the output of the inverter 41. And a second capacitive element 43B disposed between the side and the reference potential portion. In addition, the oscillation circuit 27 includes a feedback resistor connected in parallel to the inverter 41, but the illustration is omitted.

  The capacitive element 43 is composed of, for example, a variable capacitance diode, and has an anode connected to the reference potential unit and a cathode connected to the inverter 41. In addition, the cathode of the capacitive element 43 is connected to the setting unit 37. Accordingly, when the frequency adjustment signal Vcon is input from the setting unit 37 to the cathode of the capacitive element 43, the capacitance of the capacitive element 43 changes, and consequently the frequencies of the first oscillation signal Out1 and the second oscillation signal Out2 change.

  The buffer 29 includes an inverter, for example, and the input side is connected to the output side of the inverter 41. The buffer 29 also functions as an amplifier that amplifies the signal from the inverter 41. The first buffer 29A is a functional unit that outputs the first oscillation signal Out1, and the output side is connected to the fourth terminal 5D. The second buffer 29 </ b> B is a functional unit that outputs the second oscillation signal Out <b> 2, and the output side is connected to the setting unit 37.

  FIG. 3 shows a configuration in the case where the frequency, phase and waveform of the first oscillation signal Out1 and the second oscillation signal Out2 are the same. However, at least one of the frequency, phase, and waveform of these signals may be different from each other. That is, an appropriate configuration may be added to the transmission path of each signal, for example, a frequency divider for making the frequency different between the inverter 41 and the second buffer 29B is arranged.

  The drive control unit 31 is a functional unit that allows or prohibits power supply to the buffer 29 based on the drive control signal E / D input from the setting unit 37. For example, the drive control unit 31 is arranged between the buffer 29 and the sixth terminal 5F, and includes a switch such as a transistor for connecting or disconnecting these.

  The temperature sensor 33 includes a thermistor, for example, and outputs a temperature signal T corresponding to the ambient temperature. The temperature signal T is input to the temperature compensation circuit 35 and to the setting unit 37.

  Although not particularly illustrated, the temperature compensation circuit 35 includes, for example, a cubic function generation circuit. The memory 39 holds data in which the temperature is associated with the coefficient of the cubic function and a constant, and the temperature compensation circuit 35 refers to the data to respond to the detection result of the temperature sensor 33. A cubic function is output. The output signal is added to the frequency adjustment signal Vcon and applied to the cathode of the capacitive element 43.

  The setting unit 37 is connected to the selection terminal 5 (5A, 5B, and 5E). The setting unit 37 inputs the drive control signal E / D input from any of the three selection terminals 5 to the drive control unit 31, and oscillates the frequency adjustment signal Vcon input from any of the three selection terminals 5. Input to the circuit 27. Further, the setting unit 37 outputs one of the second oscillation signal Out2 input from the second buffer 29B and the temperature signal T input from the temperature sensor 33 from any of the three selection terminals 5. The setting unit 37 selects such a signal and allocates the signal to the selection terminal 5 based on the input terminal control signal Sc0.

  FIG. 4 is a block diagram showing details of the setting unit 37 and the like.

  The setting unit 37 includes a switch unit 45 that controls which of the second oscillation signal Out2 and the temperature signal T is output from the terminal 5, and one of the second oscillation signal Out2 and the temperature signal T, the drive control signal E / D, In addition, a selection unit 47 that allocates the frequency adjustment signal Vcon to the first terminal 5A, the second terminal 5B, and the fifth terminal 5E is provided. The terminal control signal Sc0 (FIG. 3) includes a first control signal Sc1 and three second control signals Sc2. The first control signal Sc1 is input to the switch unit 45, and the second control signal Sc2 is input to the selection unit 47. Yes.

  The switch unit 45 is disposed between the two functional units of the second buffer 29B (Out2) and the temperature sensor 33 (T) and the selection unit 47 (intermediate line 46). The switch unit 45 includes, for example, an FET and connects the selection unit 47 with one of the second buffer 29B and the temperature sensor 33 in accordance with the input first control signal Sc1.

  The selection unit 47 includes three functional units including a switch unit 45 (intermediate line 46), a drive control unit 31 (E / D), and a capacitive element 43 (Vcon), a first terminal 5A, a second terminal 5B, and a fifth terminal. It is arranged between three terminals of 5E. The selection unit 47 includes the switch unit 45, the drive control unit 31, and the oscillation circuit 27, and the first terminal 5A, the second terminal 5B, and the fifth terminal 5E in a correspondence relationship according to the input second control signal Sc2. Connect one-on-one.

  Note that the operation of the selection unit 47 is equivalent to selecting the terminal that outputs or receives the one signal from the first terminal 5A, the second terminal 5B, and the fifth terminal 5E, when focusing on one signal. To do.

  The selection unit 47 includes, for example, a first individual selection unit 49A to a third individual selection unit 49C. Each individual selection unit 49 is connected to the three functional units of the switch unit 45, the drive control unit 31, and the capacitive element 43, and any one of the first terminal 5A, the second terminal 5B, and the fifth terminal 5E. Connected to one. Each individual selection unit 49 connects one of the three functional units to the terminal 5 connected to itself based on the second control signal Sc2.

  The first control signal Sc1 and the second control signal Sc2 (terminal control signal Sc0) are generated by reading the memory 39. For example, the first control signal Sc1 is generated by reading 1-bit control data COM4, and the three second control signals Sc2 are generated by reading 3-bit control data COM1 to COM3 (each 1 bit). Note that the data related to the compensation referred to by the temperature compensation circuit 35 is stored in the memory 39 as the correction data COM10.

  FIG. 5 is a diagram illustrating the relationship between the contents of the control data COM1 to COM4 and signals assigned to the terminals.

  The contents of the control data COM <b> 1 to COM <b> 4 can be rewritten via the data input unit 7. Then, by selectively inputting any combination in each row in FIG. 5, the correspondence relationship between the four signals and the three terminals 5 is determined. Note that at least a part of the content of the correction data COM10 can also be rewritten via the data input unit 7.

  According to the above embodiment, the oscillator 1 is arranged on the base body 3, the semiconductor component 17 that performs signal processing using the piezoelectric body 15, the base body 3 that holds the piezoelectric body 15 and the semiconductor part 17, and the base body 3. And a plurality of terminals 5 connected to the semiconductor component 17. The plurality of terminals 5 include a first predetermined number (however, the first predetermined number is 2 or more, 3 in the present embodiment) selection terminals 5 (5A, 5B, and 5E). Based on the terminal control signal Sc0, the semiconductor component 17 outputs a terminal that outputs or receives a predetermined input / output signal (second oscillation signal Out2 or temperature signal T, drive control signal E / D, or frequency adjustment signal Vcon). 1 has a setting unit 37 for selecting from a predetermined number of selection terminals 5 (the semiconductor component 17 has a first predetermined number of selection terminals as function units or lines that output or receive predetermined input / output signals based on the terminal control signal Sc0. 5 has a setting unit 37 that selectively connects to any one of 5).

  Therefore, the position of the terminal that outputs or inputs the input / output signal can be changed as appropriate by the input of the terminal control signal Sc0 to the setting unit 37. That is, it is possible to meet various user demands regarding the terminal arrangement with one oscillator 1. As a result, a reduction in development time and development cost and an increase in cost due to an improvement in productivity are expected.

  The setting unit 37 selects a first predetermined number of input / output signals (second oscillation signal Out2 or temperature signal T, drive control signal E / D, and frequency adjustment signal Vcon) based on the terminal control signal Sc0. Assign to terminal 5 (5A, 5B and 5E).

  Therefore, in a high-function oscillator with many types of input / output signals, the positions of the terminals to which the input / output signals are output or input can be exchanged to meet various user requirements.

  Based on the terminal control signal Sc0, the setting unit 37 receives the first predetermined number (3) from the second predetermined number (where the second predetermined number is 2 or more, 2 in the present embodiment) of the input / output signals (Out2 and T). ) A third predetermined number (1 in this embodiment) of input / output signals less than the second predetermined number is selected below, and a terminal for outputting or receiving the selected input / output signal is a first predetermined number of selection terminals 5 (5A). 5B and 5E).

  Therefore, without being limited to the number of selection terminals 5 (first predetermined number), it is possible to provide a large number of functions to the oscillator 1 and to deal with various and advanced demands of various users with one oscillator. From another viewpoint, it is possible to suppress an increase in the number of terminals while increasing the functionality of the oscillator 1.

  The semiconductor component 17 receives a first buffer 29A that can output the first oscillation signal Out1 based on the vibration of the piezoelectric body 15 via any of the plurality of terminals 5, and a second oscillation signal Out2 based on the vibration of the piezoelectric body 15. The second buffer 29B that can output via any of the plurality of terminals 5, the temperature sensor 33 that can output the temperature signal T according to the ambient temperature, and the piezoelectric body 15 due to temperature change based on the temperature signal T. And a temperature compensation circuit 35 that compensates for the frequency change. The second predetermined number (2) of input / output signals include the second oscillation signal Out2 and the temperature signal T.

  Therefore, the oscillator 1 is excellent in diversification or increase in the number of oscillation signals while reducing the number of terminals. Specifically, if the second oscillation signal Out2 having at least one of frequency, waveform, and phase different from the first oscillation signal Out1 is output, diversification of the oscillation signals is achieved. If the second oscillation signal Out2 having the same frequency as the first oscillation signal Out1 is output, the number of oscillation signals can be increased. Such an increase in number can contribute to simplification of the wiring of the electronic device on which the oscillator 1 is mounted. The temperature signal T can be used for temperature compensation of other oscillators. In other words, the temperature signal T contributes to temperature compensation of various or a large number of oscillation signals in an electronic device in which the oscillator 1 is mounted. The user can select whether the oscillation signal is diversified or increased by the oscillator 1 or an oscillator different from the oscillator 1 and the increase in the terminal 5 due to the provision of such options. Does not occur in the oscillator 1.

  The semiconductor component 17 includes a memory 39 that holds correction data COM10 that is referred to by the temperature compensation circuit 35 and control data COM1 to 4 that are referred to when generating the terminal control signal Sc0.

  Accordingly, it is not necessary to provide a new memory in the oscillator 1 in order to enable setting of the terminal arrangement, and it is only necessary to use a free area of the temperature compensation memory or to increase the capacity of the temperature compensation memory. . As a result, simplification and cost reduction of the oscillator 1 can be achieved.

  The setting unit 37 selects a third predetermined number of input / output signals (Out2 or T) selected based on the terminal control signal Sc0, and a fourth predetermined number that is not selected / deselected (however, the third predetermined number). And the fourth predetermined number are assigned to the first predetermined number of selection terminals 5 with the input / output signals (E / D and Vcon) equal to or less than the first predetermined number, 2 in this embodiment.

  Therefore, it becomes easy to balance the increase in functions that can be used simultaneously and the reduction in the number of terminals. Specifically, it is as follows. As described above, the setting unit 37 selects the third predetermined number (1) of input / output signals from the second predetermined number of input / output signals (Out2 and T). Can be suppressed. However, as a result, many functions cannot be used simultaneously. Therefore, in the oscillator 1, a user's request among signals that are appropriately allocated to the selection terminal 5 based on the terminal control signal Sc 0, in other words, a signal that has a high probability of being an additional function signal, is required. A signal with a relatively low function (Out2 or T) is selected / unselected, and a signal with a relatively high function of the user (E / D and Vcon) is not selected / deselected. . As a result, the oscillator 1 can easily satisfy various requests while suppressing an increase in the number of terminals.

  The effect of facilitating the balance between the increase in the number of functions that can be used simultaneously and the reduction in the number of terminals is in particular the third predetermined number (the number of selected signals) and the fourth predetermined number (selection / non-selection). This is significant when the sum of the number of signals that are not performed) is equal to the first predetermined number (the number of selection terminals 5).

  The semiconductor component 17 amplifies the first oscillation signal Out1 or the second oscillation signal Out2 based on the vibration of the piezoelectric body 15 based on the drive control signal E / D input through any of the plurality of terminals 5. Based on the drive control unit 31 that permits or prohibits the power supply to the first buffer 29 </ b> A or the second buffer 29 </ b> B and the frequency adjustment signal Vcon input through any of the plurality of terminals 5, the frequency of the piezoelectric body 15 is determined. And a capacitive element 43 to be changed. The fourth predetermined number of input / output signals (signals that are not selected / deselected) include a drive control signal E / D and a frequency adjustment signal Vcon.

  The drive control signal E / D and the frequency adjustment signal Vcon are signals having an additional function for enhancing the functionality of the oscillator 1, and are signals with a relatively high demand from the user. By assigning such a signal and a signal (Out2 or T), which is selected / deselected and the user's request is relatively low, to the first predetermined number of selection terminals 5, the above-described simultaneous use is possible. The effect of easily balancing the increase in function and the reduction in the number of terminals becomes remarkable.

  The terminal control signal Sc0 includes a first control signal Sc1 and a second control signal Sc2. The semiconductor component 17 includes a second predetermined number of first function units (second buffer 29B and temperature sensor 33) that outputs or receives a second predetermined number of input / output signals (Out2 and T), and a fourth predetermined number of input / outputs. A fourth predetermined number of second function units (drive control unit 31 and capacitive element 43) that output or receive signals (E / D and Vcon) are included. The setting unit 37 includes a third predetermined number of intermediate lines 46 that transmit a third predetermined number of input / output signals (Out2 or T). The setting unit 37 includes a switch unit 45 that switches connection between the second predetermined number of first function units (29B, 33) and the third predetermined number of intermediate lines 46. The setting unit 37 includes a selection unit 47 that switches connection between the third predetermined number of intermediate lines 46 and the fourth predetermined number of second function units (31, 43) and the first predetermined number of selection terminals 5. .

  That is, in the setting unit 37, a means for selecting a signal (switch unit 45) and a means for allocating a signal after selection and a signal that is not selected / unselected to the selection terminal 5 (selection unit 47) are differentiated. Has been. As a result, the configuration of each means is simple, and design and the like are easy.

  The setting unit 37 includes a plurality of fixed terminals 5 (5C) included in the plurality of terminals 5 other than the first predetermined number of selection terminals 5 (however, the fifth predetermined number is 1 or more, 3 in the present embodiment). 5D and 5F) are not assigned input / output signals (Vcc, GND, Out1).

  Therefore, by not assigning a signal having a high probability that the position of a terminal to be output or input according to a standard or the like is determined, the burden on the setting unit 37 can be reduced, and the setting unit 37 can be simplified. Examples of such signals include the reference potential signal GND, the drive potential signal Vcc, and the first oscillation signal Out1 as exemplified in the embodiment.

  The configuration that exhibits the effects of the present embodiment described above may be extracted from the semiconductor component 17 instead of the entire oscillator 1. That is, the semiconductor component 17 that performs signal processing using the piezoelectric body 15 includes a plurality of terminals (pads 21) and terminals (pads) that output or receive predetermined input / output signals based on the terminal control signal Sc0. The semiconductor component 17 having the setting unit 37 that selects from a plurality of terminals (pads 21) has the effect of this embodiment.

  In the above embodiment, the oscillator 1 is an example of the piezoelectric device of the present invention, the first buffer 29A is an example of the first output unit and the amplification unit of the present invention, and the second buffer 29B is the first buffer of the present invention. 2 is an example of an output unit and an amplification unit, and the capacitive element 43 is an example of a frequency adjustment unit of the present invention.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The piezoelectric device is not limited to an oscillator as long as it performs processing using a piezoelectric effect (including an inverse piezoelectric effect) of a piezoelectric body. For example, the piezoelectric device may be an acceleration sensor, a resonator, or a filter. The piezoelectric body is not limited to quartz but may be ceramic.

  As is clear from the fact that the present invention may be used in piezoelectric devices other than oscillators, the structure of the substrate and the arrangement of terminals may be appropriate. Also in the oscillator, the structure of the base and the arrangement of the terminals are not limited to those of the embodiment. For example, the oscillator base may be one in which both the vibrator and the semiconductor component are disposed in the same cavity. Further, the oscillator is not limited to a flip chip type, and may be a wire bonding type.

  The terminal control signal is not limited to a signal generated by reading data held in the memory. For example, the terminal control signal may be input via a terminal exposed to the outside of the base.

  The first predetermined number of selection terminals is not limited to a part of the plurality of terminals provided in the piezoelectric device, and may be all terminals of the plurality of terminals provided in the piezoelectric device. In other words, the signals assigned to all terminals may be changeable.

  It is not always necessary to assign any input / output terminal to the first predetermined number of selection terminals (terminals whose input or output changes). That is, a selection terminal for playing without being used may be generated. In such a state, the total number of input / output signals that may be input / output via the selection terminal (for example, the sum of the second predetermined number and the fourth predetermined number) is less than the first predetermined number. Or the number of input / output signals after the input / output signals are selected (for example, the sum of the third predetermined number and the fourth predetermined number) may be less than the first predetermined number. Good.

  The setting unit may not have a function of selecting a third predetermined number of input / output signals that are equal to or less than the first predetermined number and less than the second predetermined number from the second predetermined number of input / output signals. In other words, the setting unit may not have a function of selecting a function used in the oscillator, and may allocate all of a plurality of types of signals to a plurality of terminals. Conversely, the setting unit may have a function of not allocating any second predetermined number of input / output signals to a plurality of terminals (stopping all the second predetermined number of functions). The setting unit may be able to change the third predetermined number based on the terminal control signal.

  A setting part is not limited to what has a switch part and a selection part. For example, in the embodiment, the selection unit 47 has three individual selection units 49 that connect one of the three functional units to the terminal 5 connected to the selection unit 49. However, the selection unit has four functions. The switch unit may be omitted by having three individual selection units that connect one of the units to the terminal 5 connected to itself.

  In the embodiment, the second predetermined number of input / output signals are the second oscillation signal and the temperature signal, the fourth predetermined number of input / output signals are the drive control signal and the frequency adjustment signal, and the fifth predetermined number of input / output signals is the reference. The potential signal, the drive potential signal, and the first oscillation signal are only examples. For example, the drive control signal may be a second predetermined number of input / output signals, or the first oscillation signal and the temperature signal may be a fourth predetermined number of input / output signals. Any of the above signals (functions) may be omitted, and conversely, signals other than those described above may be input / output signals.

  The temperature sensor may be configured separately from the semiconductor component and input a temperature signal to the semiconductor component.

  DESCRIPTION OF SYMBOLS 1 ... Oscillator (piezoelectric device), 3 ... Base | substrate, 5A ... 1st terminal (selection terminal), 5B ... 2nd terminal (selection terminal), 5C ... 3rd terminal (fixed terminal), 5D ... 4th terminal (fixed terminal) 5E ... 5th terminal (selection terminal), 5F ... 6th terminal (fixed terminal), 15 ... Piezoelectric body, 17 ... Semiconductor component, 37 ... Setting part, Out2 ... Second oscillation signal, T ... Temperature signal, E / D: drive control signal, Vcon: frequency adjustment signal.

Claims (7)

A piezoelectric body;
A semiconductor component that performs signal processing using the piezoelectric body;
A base for holding the piezoelectric body and the semiconductor component;
A plurality of terminals including a first predetermined number (here, the first predetermined number is 2 or more) of selection terminals arranged on the base body and connected to the semiconductor component;
Have
The semiconductor component is
A first output unit capable of outputting a first oscillation signal based on vibration of the piezoelectric body via any of the plurality of terminals;
A second output unit capable of outputting a second oscillation signal based on the vibration of the piezoelectric body via any of the plurality of terminals;
A temperature sensor that can output a temperature signal according to the ambient temperature;
A temperature compensation circuit that compensates for a frequency change of the piezoelectric body due to a temperature change based on the temperature signal;
Based on the terminal control signal, a third predetermined number of input / output signals less than the first predetermined number and less than the second predetermined number from a second predetermined number (where the second predetermined number is 2 or more). select, possess a setting unit for selecting or receiving terminals and outputs the selected input and output signals of said third predetermined number from the selection terminal of the first predetermined number, and
The piezoelectric device in which the second predetermined number of input / output signals includes the second oscillation signal and the temperature signal . The piezoelectric device according to claim 1 , wherein the semiconductor component includes a memory that holds correction data referred to by the temperature compensation circuit and control data referred to when generating the terminal control signal. The setting unit is configured to select the third predetermined number of input / output signals selected based on the terminal control signal and a fourth predetermined number that is not selected / deselected (however, the third predetermined number and the first predetermined number). 3. The piezoelectric device according to claim 1, wherein four or more predetermined numbers are assigned to the first predetermined number of selection terminals. A piezoelectric body;
A semiconductor component that performs signal processing using the piezoelectric body;
A base for holding the piezoelectric body and the semiconductor component;
A plurality of terminals including a first predetermined number (here, the first predetermined number is 2 or more) of selection terminals arranged on the base body and connected to the semiconductor component;
Have
The semiconductor component is
A drive control unit that permits or prohibits power supply to an amplification unit that amplifies an oscillation signal based on vibration of the piezoelectric body, based on a drive control signal input through any of the plurality of terminals;
A frequency adjustment unit that changes the frequency of the piezoelectric body based on a frequency adjustment signal input via any of the plurality of terminals;
Based on the terminal control signal, a third predetermined number of input / output signals less than the first predetermined number and less than the second predetermined number from a second predetermined number (where the second predetermined number is 2 or more). And the third predetermined number of input / output signals selected and the fourth predetermined number not selected / deselected (however, the sum of the third predetermined number and the fourth predetermined number is the first predetermined number). A terminal for outputting or receiving the third predetermined number and the fourth predetermined number of input / output signals so that input / output signals of 1 predetermined number or less) are assigned to the first predetermined number of selection terminals. A setting unit to select from the selection terminal,
The fourth predetermined number of input / output signals includes the drive control signal and the frequency adjustment signal.
Pressure electric devices. A piezoelectric body;
A semiconductor component that performs signal processing using the piezoelectric body;
A base for holding the piezoelectric body and the semiconductor component;
A plurality of terminals including a first predetermined number (here, the first predetermined number is 2 or more) of selection terminals arranged on the base body and connected to the semiconductor component;
Have
The semiconductor component is
Based on the terminal control signal, a third predetermined number of input / output signals less than the first predetermined number and less than the second predetermined number from a second predetermined number (where the second predetermined number is 2 or more). And the third predetermined number of input / output signals selected and the fourth predetermined number not selected / deselected (however, the sum of the third predetermined number and the fourth predetermined number is the first predetermined number). A terminal for outputting or receiving the third predetermined number and the fourth predetermined number of input / output signals so that input / output signals of 1 predetermined number or less) are assigned to the first predetermined number of selection terminals. A setting section to select from the selection terminal;
A first function of accepting or outputs the output signal of the second predetermined number and the second predetermined number,
And a second functional part of the fourth predetermined number of accepting or outputting the output signal of the fourth predetermined number,
The setting unit
The third predetermined number of intermediate lines for transmitting the third predetermined number of input / output signals;
A switch unit for switching connection between the second predetermined number of first function units and the third predetermined number of intermediate lines;
A selection unit that switches connection between the third predetermined number of intermediate lines and the fourth predetermined number of second function units, and the first predetermined number of selection terminals;
Pressure electric devices. The piezoelectric device according to claim 3, wherein a sum of the third predetermined number and the fourth predetermined number is equal to the first predetermined number. The setting unit does not assign an input / output signal to a fifth predetermined number (however, the fifth predetermined number is 1 or more) other than the first predetermined number of selection terminals included in the plurality of terminals. the piezoelectric device according to any one of claims 1-6.

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