JP2013059136A - Piezoelectric device, electronic apparatus, and input and output method of data of piezoelectric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piezoelectric device which prevents abnormality from occurring in an internal circuit even when mounted on a substrate of an electronic apparatus, and to provide the electronic apparatus.SOLUTION: A piezoelectric device includes a storage part 16, allowing data to be input from the exterior, in a package 30. In the piezoelectric device, multiple user terminals 38 and a first adjustment terminal 40a and a second adjustment terminal 40b, which connect with the storage part 16, are provided on a substrate mounting surface 36 of the package 30. The first adjustment terminal 40a is disposed in the vicinity of a ground connection terminal (GND terminal) from among the multiple user terminals 38. A switch part 17 is provided between the second adjustment terminal 40b and the storage part 16, and the first adjustment terminal 40a is connected with the switch part 17 to conduct the opening and closing control of the switch part 17 with signals input to the first adjustment terminal 40a.

Description

  The present invention relates to a piezoelectric device and an electronic apparatus.

  There are various types of piezoelectric devices, and an example thereof is a piezoelectric oscillator. Some piezoelectric oscillators include a piezoelectric vibrating piece and an integrated circuit (IC) chip mounted inside a package. On the outer surface of the package, there are provided a user terminal used when the piezoelectric oscillator is mounted on the substrate and an adjustment terminal used only when adjusting the piezoelectric oscillator. The adjustment of the piezoelectric oscillator is performed at the time of manufacture so that various characteristics including the frequency are matched with the customer's specifications. That is, this adjustment is an operation to drive the characteristics of the piezoelectric oscillator to the target performance using a memory circuit provided in the circuit of the IC chip, and the adjustment items vary depending on the type of the piezoelectric oscillator. Such adjustment work is performed by the manufacturer of the piezoelectric oscillator, and an adjustment terminal is necessary to access the memory in this adjustment work, but the adjustment terminal is particularly necessary for the user who uses the piezoelectric oscillator. It is not a thing.

The piezoelectric oscillator disclosed in Patent Document 1 includes external connection electrode terminals at the four corners of the lower surface of the container body, and a data write electrode pad between the external connection electrode terminals.
In addition, the piezoelectric oscillator disclosed in Patent Document 2 includes surface mounting pad electrodes in the vicinity of the four corners of the bottom surface of the package, and side electrodes for writing data in the vicinity of the pad electrodes on the side surface of the package. . When the package is surface-mounted, the pad electrode is soldered to the wiring pattern of the substrate, and at the same time, it is also fixed by the solder rising up to the side electrode.

JP 2007-103994 A JP 2006-101276 A

  Currently, as electronic devices are downsized, there is a demand for downsizing the piezoelectric oscillators mounted on the electronic devices. When the user terminal and the adjustment terminal are provided on the bottom surface of the package, if the planar size of the piezoelectric oscillator is reduced, the interval between the user terminal and the adjustment terminal is narrowed. When the piezoelectric oscillator is mounted on the substrate on the user side, the mounting electrode provided on the substrate and the user terminal are bonded one-to-one. However, when mounting displacement occurs, there arises a problem that the adjustment terminal is joined to the mounting electrode. The memory circuit is originally designed on the assumption that the adjustment terminal is open when used by the user. For this reason, when the adjustment terminal is short-circuited with the user terminal, the characteristics of the piezoelectric oscillator are abnormal. Further, even if there is no such mounting deviation, there arises a problem that the state of the memory changes if some external noise is applied to the adjustment terminal.

  In addition, when the adjustment terminal is provided on the side of the package, the distance between the electronic devices mounted on the board is reduced with the downsizing of the electronic equipment, so that the adjustment terminal can easily touch other electronic devices during mounting. Or become susceptible to electromagnetic influences from other electronic devices. If any external noise is applied to the adjustment terminal in such a case, there arises a problem that the memory state changes.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a piezoelectric device and an electronic apparatus that prevent occurrence of an abnormality in an internal circuit even when mounted on a substrate of the electronic apparatus.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1] A piezoelectric vibrating piece, a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece, and a storage unit for storing setting conditions of the control circuit are provided, and data in the storage unit can be rewritten. A first adjustment terminal to which a signal for input is input and the storage unit are electrically connected, and a second adjustment terminal to which data stored in the storage unit is input and the storage unit are electrically connected via a switch unit. The piezoelectric device is configured to open and close by the control of a signal supplied to a control terminal of the switch unit, and the first adjustment terminal and the control terminal are electrically connected.
The second adjustment terminal and the storage unit can be disconnected by controlling the switch unit with a signal input to the first adjustment terminal. For this reason, even if there is mounting misalignment or external noise, when the switch is open, any signal or voltage is input to the second adjustment terminal. Can be prevented.

Application Example 2 The piezoelectric device according to Application Example 1, wherein the first adjustment terminal and the ground are electrically connected via a resistor.
Thereby, it can fix to the state which opened the switch part. Therefore, even if there is mounting misalignment or external noise, the switch part is open, so that no matter what signal or voltage is input to the second adjustment terminal, abnormalities occur in the internal circuit such as the memory part malfunctioning. Can be prevented.

[Application Example 3] The application example is characterized in that the first adjustment terminal and the ground are electrically connected through a resistor, and a conductor path for electrically connecting the switch unit and the storage unit is grounded through a resistor. The piezoelectric device according to Example 1.
When the switch unit is controlled according to the level of the signal input to the first adjustment terminal, and this switch unit is opened, a pull-down resistor provided at the subsequent stage of the first adjustment terminal and the second adjustment terminal is used to The circuit can be stabilized.

Application Example 4 A circuit board including at least the storage unit is provided, and one surface of the circuit board includes a plurality of user terminals for surface mounting, the first adjustment terminal, and the second adjustment terminal, The distance between the first adjustment terminal and the user terminal adjacent to the first adjustment terminal is shorter than the distance between any two of the user terminals and the distance between the other user terminal and the first adjustment terminal. The piezoelectric device according to Application Example 2 or 3, wherein the adjacent user terminals are ground connection terminals.
As a result, the first adjustment terminal and the ground connection terminal can be arranged close to each other, and these can be easily set to the same potential.

[Application Example 5] A substrate on which the piezoelectric device according to Application Example 4 is mounted is provided, a mounting electrode is provided on the substrate, and the ground connection terminal and the first adjustment terminal are connected to each other via a conductive bonding material. An electronic apparatus characterized in that it is joined to the mounting electrode to have the same potential and the switch portion is fixed open.
When the piezoelectric device is mounted on the substrate, the first adjustment terminal can be fixed at the GND potential. The switch part is opened when a low level is input. For this reason, the first adjustment terminal is fixed to the GND potential, so that the switch unit can be fixed open. Then, even if any signal or voltage is input to the second adjustment terminal due to mounting deviation, external noise, or the like, it is possible to prevent an abnormality in the internal circuit such as a malfunction of the storage unit.

It is explanatory drawing of a temperature compensation type | mold piezoelectric oscillator. It is a block diagram explaining the structure of a temperature compensation type piezoelectric oscillator. It is explanatory drawing of the signal waveform input from an adjustment terminal and a common terminal. It is explanatory drawing when a temperature compensation type piezoelectric oscillator is mounted in the board | substrate. It is a schematic block diagram of a digital mobile phone. It is a bottom view of the temperature compensation type piezoelectric oscillator which changed the shape of an adjustment terminal and a user terminal.

  The best embodiments of the piezoelectric device and the electronic apparatus according to the present invention will be described below. First, the piezoelectric device will be described. There are various types of piezoelectric devices. For this reason, in the following embodiments, a temperature compensated piezoelectric oscillator will be described as an example of a piezoelectric device provided with a storage unit capable of inputting data from outside in a package.

  FIG. 1 is an explanatory diagram of a temperature compensated piezoelectric oscillator. Here, FIG. 1A is a front view of the temperature compensated piezoelectric oscillator, and FIG. 1B is a bottom view. FIG. 2 is a block diagram illustrating the configuration of the temperature compensated piezoelectric oscillator. As shown in FIG. 2, the temperature-compensated piezoelectric oscillator 10 has a piezoelectric vibrating piece 12 and an IC chip 14 mounted inside a package 30 that is a circuit board. The IC chip 14 includes a storage unit 16, a switch unit 17, a temperature compensation circuit 18 that is a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece 12, an oscillation circuit 20, and the like. The storage unit 16 stores data related to the setting conditions of the control circuit. The oscillation circuit 20 is connected to the piezoelectric vibrating piece 12, amplifies and oscillates the signal of the piezoelectric vibrating piece 12, and outputs an output signal. In addition, the temperature compensation circuit 18 generates a compensation voltage to be applied to a variable capacitance element provided in the oscillation circuit 20. The compensation voltage is a voltage that controls the capacitance of the variable capacitance element so that the frequency temperature characteristic of the piezoelectric vibrating piece 12 is canceled and the frequency of the oscillation circuit 20 becomes constant with respect to temperature. Therefore, it is necessary for the temperature compensation circuit 18 to individually generate an optimum compensation voltage so that the frequency of the oscillation circuit 20 is stable with respect to the temperature for the piezoelectric vibrating reed 12 having different frequency temperature characteristic variations. There is. The temperature compensation circuit 18 having the adjustment function obtains the optimum condition according to the combined vibrator and stores the correction value data using the storage unit 16. Such work is called adjustment work and is performed by the manufacturer. After the adjustment, the temperature compensation circuit 18 operates according to the conditions of the storage unit 16. As a result, the oscillation circuit 20 outputs a stable frequency with little fluctuation with respect to temperature.

  A package 30 shown in FIG. 1 has a package base 32 on which the piezoelectric vibrating reed 12 and the IC chip 14 are mounted inside a recess (not shown), and is bonded to the upper surface of the package base 32 to hermetically seal the recess. And a lid 34 to be stopped. On the board mounting surface 36 of the package base 32 (package 30), user terminals 38 and adjustment terminals 40 (first adjustment terminals 40a and second adjustment terminals 40b) are provided. As will be described later, when the temperature compensated piezoelectric oscillator 10 is mounted on a substrate constituting an electronic device, the user terminal 38 is bonded to a mounting electrode provided on the substrate via a conductive bonding material. The adjustment terminal 40 inputs a signal for rewriting data in the storage unit 16 (inputs data to the IC chip 14) and outputs data in the storage unit 16 (reads data from the IC chip 14). This is where the probe comes into contact when inputting and outputting data.

  In the case shown in FIG. 1B, the user terminals 38 are provided near the corners of the package 30, respectively. The user terminal 38 is a terminal necessary for operating the completed temperature-compensated piezoelectric oscillator 10, and includes a ground connection terminal (GND terminal), a power supply terminal (Vcc terminal), a common terminal (Vcont / Clock terminal), and an output terminal. (OUT terminal). The ground connection terminal sets the reference potential of the IC chip 14 by being connected to the ground. The power supply terminal is connected to a power supply for supplying power to the IC chip 14. The power supply terminal and the ground connection terminal are provided at diagonal positions on the bottom surface of the package base 32 so that the distance between them is the longest. The shared terminal is connected to the storage unit 16 and the oscillation circuit 20. This shared terminal is shared by the user and the manufacturer of the temperature compensated piezoelectric oscillator 10. When the temperature compensated piezoelectric oscillator 10 is manufactured, a clock signal (Clock) necessary for adjusting the setting conditions of the control circuit is input to the shared terminal and supplied to the storage unit 16. ing. Further, after the temperature compensated piezoelectric oscillator 10 is completed, a control voltage (Vcont) is inputted to the common terminal and supplied to the oscillation circuit 20.

  Further, the first adjustment terminal 40 a is provided close to any one of the user terminals 38 provided at the four corners of the lower surface of the package 30. Specifically, the first adjustment terminal 40a is disposed at a distance adjacent to the ground connection terminal, and is disposed at a distance away from other user terminals and adjustment terminals with respect to the distance. The first adjustment terminal 40a and the ground connection terminal are formed independently of each other, but have an interval of conduction by providing the conductive bonding material. For this reason, the first adjustment terminal 40a and the ground connection terminal are actively short-circuited through the conductive bonding material and the mounting electrode when the temperature compensated piezoelectric oscillator 10 is mounted on the substrate, and have the same potential. And an interval for avoiding a short circuit with other user terminals and adjustment terminals. Further, the second adjustment terminal 40 b is provided between the two user terminals 38. As a specific example, a second adjustment terminal 40b is provided in the center between the output terminal and the power supply terminal.

  As shown in FIG. 2, the adjustment terminal 40 and the user terminal 38 are connected to the input / output terminals of the IC chip 14 and the conductor wiring of the package 30 through, for example, metal wires. The second adjustment terminal 40b is connected to the switch part 17, which is composed of a transistor provided in the IC chip 14, the second pull-down resistor 26, and the inverter 28 (a parallel circuit of the second inverter 28a and the third inverter 28b). , Connected to the storage unit 16. The second adjustment terminal 40 b is a DATA terminal, and is a terminal for inputting information to be stored in the storage unit 16 or outputting information stored in the storage unit 16.

  The first adjustment terminal 40 a is connected to the storage unit 16 via a first pull-down resistor 22 and a first inverter 24 provided inside the IC chip 14. Further, the first adjustment terminal 40 a is electrically connected to the control terminal of the switch unit 17 in the previous stage of the first pull-down resistor 22. For this reason, the switch unit 17 is controlled to open and close depending on the difference between the high level and the low level of the signal input to the first adjustment terminal 40a. That is, when the switch unit 17 is an N-channel type MOS transistor, when a high level signal is input to the first adjustment terminal 40a, a high level voltage is applied to the back gate that is the control terminal of the switch unit 17. 17, the gate and the source are electrically connected, and the second adjustment terminal 40b and the storage unit 16 are connected. On the other hand, when the first adjustment terminal 40a is at the low level, a low level voltage is applied to the back gate, so that the gate and the source of the switch unit 17 become non-conductive, and the second adjustment terminal 40b and the storage unit 16 Do not connect.

  The first adjustment terminal 40a is a CS (chip select) terminal, and information can be written to and read from the storage unit 16 via the second adjustment terminal 40b depending on the high level or low level of the signal input thereto. It becomes possible or impossible. That is, when a high level signal is input to the first adjustment terminal 40a, the switch unit 17 is closed, and the memory access from the second adjustment terminal 40b to the storage unit 16 becomes possible. The second pull-down resistor 26 has an unstable potential on the input side of the storage unit 16 (input of the inverter 28) when the potential of the first adjustment terminal 40a becomes low level and the switch unit 17 is open. Is preventing.

  In order to write information (for example, the correction value data) in the storage unit 16 of the temperature compensated piezoelectric oscillator 10 as described above, it is performed as follows. FIG. 3 is an explanatory diagram of signal waveforms input from the adjustment terminal and the common terminal. First, a high level signal is supplied to the first adjustment terminal 40a which is at a low level so that the data in the storage unit 16 can be rewritten, and the switch unit 17 is closed from the open state. Thereby, the 2nd adjustment terminal 40b and the memory | storage part 16 connect. Then, in accordance with the clock signal supplied to the shared terminal, information is supplied to the second adjustment terminal 40 b and written into the storage unit 16. If the characteristic of the temperature compensated piezoelectric oscillator 10 reaches a desired value based on the information (data) stored in the storage unit 16, a signal to the first adjustment terminal 40 a is sent to finish writing the information to the storage unit 16. Stop and go to low level. As a result, the switch unit 17 is opened to open the space between the second adjustment terminal 40b and the storage unit 16, and the storage unit 16 cannot be written.

  Thereafter, the temperature compensated piezoelectric oscillator 10 is provided to the user. The temperature compensated piezoelectric oscillator 10 is mounted on the substrate constituting the electronic device. FIG. 4 is an explanatory diagram when the temperature compensated piezoelectric oscillator is mounted on a substrate. 4A is a front view when the temperature-compensated piezoelectric oscillator is mounted on the substrate, and FIG. 4B is a diagram showing a positional relationship when the adjustment terminal, the user terminal, and the mounting electrode are viewed in plan. is there. On the upper surface of the substrate 50, an electrode (the mounting electrode 52) for mounting the temperature compensated piezoelectric oscillator 10 is provided. The mounting electrode 52 is provided so as to face the ground connection terminal among the first adjustment terminal 40 a and the user terminal 38 of the temperature compensated piezoelectric oscillator 10 mounted on the substrate 50.

  The first adjustment terminal 40a and the ground connection terminal that are arranged close to each other are joined to one mounting electrode 52 (52a) straddling them, and the other user terminals 38 are joined to one mounting electrode 52, respectively. It is supposed to be. The mounting electrode 52a bonded to the first adjustment terminal 40a and the ground connection terminal can be formed to have a larger planar size than the mounting electrode 52 bonded to the other user terminal 38.

  On the other hand, even if the area of the first adjustment terminal 40a and the ground connection terminal is reduced and the area surrounding these other two terminals is made equal to each other by arranging them closer to each other, In this case, the mounting electrode 52 for the first adjustment terminal 40a need not be configured unnecessarily for the mounting terminal including the first adjustment terminal 40a and the ground connection terminal. And the mounting electrodes 52 for the other user terminals 38 can be secured wide enough to reliably prevent short-circuiting of both electrodes.

  On the mounting electrode 52 arranged in this way, the conductive bonding material 54 such as solder or conductive adhesive is provided, and the board mounting surface 36 so that the adjustment terminal 40 and the user terminal 38 are disposed thereon. The temperature compensated piezoelectric oscillator 10 is mounted with the substrate facing the substrate 50. At this time, the first adjustment terminal 40 a and the ground connection terminal are bonded to the mounting electrode 52 by one conductive bonding material 54. Thus, even after mounting, the first adjustment terminal 40a has the same potential as the ground connection terminal (connected to GND), so the second adjustment terminal 40b is an internal circuit (storage unit 16) of the IC chip 14. ) And remain disconnected. That is, when the temperature-compensated piezoelectric oscillator 10 is mounted, the first adjustment terminal 40a is fixed at a low level, so the switch unit 17 is also fixed open, and external noise or an unexpected voltage is applied to the second adjustment terminal 40b. Even if this happens, data cannot be written to or read from the storage unit 16.

  There are various electronic devices including the substrate 50 on which the temperature-compensated piezoelectric oscillator 10 is mounted. Examples of the electronic device include a digital cellular phone, a personal digital assistant (PDA), a personal computer, and the like. it can. Among these specific examples, the digital cellular phone has the following configuration. FIG. 5 is a schematic configuration diagram of a digital mobile phone. The digital cellular phone 60 includes a transmission / reception signal transmission unit 62 and a reception unit 64, and a central processing unit (CPU) 66 that controls them is connected to the transmission unit 62 and the reception unit 64. In addition to modulation and demodulation of transmission / reception signals, the CPU 66 controls an information input / output unit 68 including a display unit and operation keys for inputting information, and a memory 70 including a RAM and a ROM. For this reason, the piezoelectric device 72 is attached to the CPU 66, and its output frequency is used as a clock signal suitable for the control contents by a predetermined frequency dividing circuit (not shown) incorporated in the CPU 66. The CPU 66 is connected to the temperature compensated piezoelectric oscillator 10, and the temperature compensated piezoelectric oscillator 10 is connected to the transmitter 62 and the receiver 64. As a result, even if the basic clock from the CPU 66 fluctuates when the environmental temperature changes, it is corrected by the temperature compensated piezoelectric oscillator 10 and supplied to the transmitting unit 62 and the receiving unit 64.

  According to the temperature compensated piezoelectric oscillator 10 described above, the switch unit 17 controlled by the level of the signal input to the first adjustment terminal 40a is disposed immediately after the second adjustment terminal 40b. / The second adjustment terminal 40b and the internal circuit can be separated by the low level. When the first adjustment terminal 40a is at the low level, the second adjustment terminal 40b is in an open state, so that no internal circuit operates even if any signal is input to the second adjustment terminal 40b. By supplying a high level signal to 40a, the signal (information) input to the second adjustment terminal 40b can be transmitted to the internal circuit. As a result, if the first adjustment terminal 40a is fixed at a low level, no matter what signal or voltage is input to the second adjustment terminal 40b, an abnormality occurs in an internal circuit such as the storage unit 16 malfunctioning. Can be prevented.

  That is, even if a voltage is accidentally applied to the adjustment terminal 40 after the product of the temperature compensated piezoelectric oscillator 10 is completed, it is possible to prevent the storage state of information stored in the storage unit 16 from being affected. Therefore, when the temperature compensated piezoelectric oscillator 10 is mounted on the substrate 50, mounting deviation occurs, and the adjustment terminal 40 that should be open is short-circuited with the mounting electrode 52, or due to external noise to the adjustment terminal 40. Even if a malfunction occurs, it is possible to prevent an abnormality from occurring in the circuit.

  The first pull-down resistor 22 can stabilize the input of the first inverter 24 to low. Further, the input of the inverter 28 can be stabilized low by the second pull-down resistor 26 provided between the switch unit 17 and the inverter 28.

  Further, the temperature compensated piezoelectric oscillator 10 can easily realize a circuit in the IC chip 14 and can easily design the substrate 50. Then, by changing the shape of the mounting electrode 52a where the first adjustment terminal 40a and the ground connection terminal are joined to the other mounting electrode 52, the arrangement of the mounting electrodes 52 can be asymmetrical. Therefore, it is possible to prevent the temperature compensated piezoelectric oscillator 10 from being mounted on the substrate 50 in the reverse direction.

  Note that the shape of the adjustment terminal 40 and the user terminal 38 that are arranged close to each other in a plan view is not limited to a rectangular shape, and may be an arbitrary shape. As an example, as shown in FIG. 6, the adjustment terminal 40 and the user terminal 38 that are arranged close to each other may be triangular. When the shape of each terminal is a triangle, it is possible to improve workability when the probe is brought into contact with the adjustment terminal 40 at the time of adjustment work for writing information in the storage unit 16. That is, in order to bring the probe into contact with an adjacent terminal, it is ideal to carry out the process at a diagonal position, and a form in which this is realized is as shown in FIG.

  The piezoelectric device includes not only the temperature-compensated piezoelectric oscillator 10 described above but also a piezoelectric vibrating piece 12 and a storage unit 16 that can input data from the outside, and is connected to the storage unit 16. What is necessary is just the form which provided the adjustment terminal 40 and the user terminal 38 used at the time of mounting in the outer surface of the package 30. FIG. As a specific example, the present invention can be applied to a voltage-controlled piezoelectric oscillator, a programmable piezoelectric oscillator, a real-time clock, a gyro sensor device, and the like.

DESCRIPTION OF SYMBOLS 10 ......... Temperature compensation type piezoelectric oscillator, 12 ......... Piezoelectric vibrating piece, 14 ......... Integrated circuit (IC) chip, 16 .... Storage unit, 17 ......... Switch unit, 22 ......... First pull-down Resistance, 30 ......... Package, 32 ......... Package base, 36 ......... Board mounting surface, 38 ......... User terminal, 40 ......... Adjustment terminal, 50 ......... Board, 52 ......... Mounting electrode, 54 .... Conductive bonding material, 60 .... Digital mobile phone.

The present invention relates to a piezoelectric device, an electronic apparatus, and a data input / output method of the piezoelectric device .

An object of the present invention is to provide a piezoelectric device, an electronic device, and a data input / output method for the piezoelectric device that prevent an internal circuit from being abnormal even when mounted on a substrate of the electronic device.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.
That is, the piezoelectric device of the present invention includes a piezoelectric vibrating piece, and a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece, and a serial憶部for storing data which is setting conditions of the control circuit, and a control terminal, wherein a switch unit connected to the control terminal, with which is placed a pre-term memory unit, on one side, and the terminal for three or more surface mounted, to the rewritable and read the data a first adjusting terminal to which a signal is input, and a circuit board and a second adjusting terminals are arranged to the data is input output, the first adjustment pin, and said storage unit electrically connected to said control terminal, and are conductive to the ground through a resistor, said second adjustment terminal is connected to the storage unit through the front Symbol switch unit, the three or more surfaces One of the mounting terminals is a ground connection terminal. The distance between one adjustment terminal and the ground connection terminal is a distance between any two of the other surface mounting terminals and one of the other surface mounting terminals and the first adjustment. The piezoelectric device can be configured to be shorter than the distance between the terminals.
Further, the piezoelectric vibrating piece, and a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece, and a serial憶部for storing data which is setting conditions of the control circuit, and a control terminal connected to said control terminal a switch unit, with which is placed a pre-term memory unit, on one side, and the terminal for three or more surface mounted, the signal for the rewritable and read the data of the storage unit is input a first adjustment terminal, and a circuit board on which the data is arranged and a second adjustment terminal being input output stored in the storage unit, the first adjustment terminal, the control and the storage unit electrically connected to the terminal, and has through a resistor electrically connected to the ground, the second adjustment pin, before SL being connected to the said storage unit via the switch unit, and the switch unit and the storage unit The conductor path connecting the One of the three or more surface mounting terminals is a ground connection terminal, and the distance between the first adjustment terminal and the ground connection terminal is the same as that of the other surface mounting terminals. The piezoelectric device can be configured to be shorter than the distance between any two and the distance between any one of the other surface mounting terminals and the first adjustment terminal.
A substrate on which the piezoelectric device having the above-described configuration is mounted, a mounting electrode is provided on the substrate, and the ground connection terminal and the first adjustment terminal are connected to each other through a conductive bonding material. It can be configured as an electronic device characterized in that it is joined to the mounting electrode and has the same potential, and the switch portion is fixed open.
On the other hand, the piezoelectric device data input / output method according to the present invention is for inputting / outputting the data to / from a storage unit for storing data, which is a setting condition of a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece. A switch unit that controls opening / closing of a path, and a signal for inputting / outputting the data are input to the storage unit, and the path is made conductive and the storage unit is in a state in which the data can be written, After inputting / outputting the data to / from the storage unit through the path, the signal is stopped to shut off the path and to make the storage unit in a state in which the data cannot be written. It can be configured as a device data input / output method.

Claims (5)

A piezoelectric vibrating piece, a control circuit for controlling the resonance frequency of the piezoelectric vibrating piece, and a storage unit for storing setting conditions of the control circuit,
The first adjustment terminal to which a signal for enabling rewritable data of the storage unit is connected to the storage unit, and the second adjustment terminal to which the data stored in the storage unit is input and the storage unit And conduct through the switch part,
The switch portion is opened and closed by controlling a signal supplied to a control terminal of the switch portion,
The piezoelectric device characterized in that the first adjustment terminal and the control terminal are electrically connected.   The piezoelectric device according to claim 1, wherein the first adjustment terminal and the ground are electrically connected via a resistor.   2. The configuration according to claim 1, wherein the first adjustment terminal and the ground are electrically connected through a resistor, and a conductor path that connects the switch unit and the storage unit is grounded through a resistor. Piezoelectric device. A circuit board on which at least the storage unit is mounted;
One surface of the circuit board comprises a plurality of surface mount user terminals, the first adjustment terminal and the second adjustment terminal,
The distance between the first adjustment terminal and the user terminal adjacent to the first adjustment terminal is shorter than the distance between any two of the user terminals and the distance between the other user terminal and the first adjustment terminal. And
The piezoelectric device according to claim 2, wherein the adjacent user terminal is a ground connection terminal.   A substrate on which the piezoelectric device according to claim 4 is mounted, a mounting electrode is provided on the substrate, and the ground connection terminal and the first adjustment terminal are bonded to one mounting electrode via a conductive bonding material. In addition, the electronic device is characterized in that the potential is the same and the switch portion is fixed open.

Images