JP5163335B2 - transceiver - Google Patents

Description

  The present invention relates to a wireless device.

  Conventionally, wireless devices that wirelessly communicate audio signals and the like are known. Examples of the wireless device include a handy device as a wireless communication terminal, an in-vehicle device, and a repeater (fixed wireless station: repeater) that relays wireless communication. When the wireless device is a wireless communication terminal, power is supplied from a built-in battery or a vehicle-mounted battery as a power source. Further, when the wireless device is a repeater, the commercial AC power supply voltage is converted into a DC voltage to supply power.

  In the wireless device, it is assumed that the power supply voltage is reduced for some reason during the erasing or writing of the setting data and the state storage data to the built-in memory by the control microcomputer. The In this case, since the power to the control microcomputer and the memory is cut off during the erasing or writing of the data, the setting data and the state storage data may be destroyed. If the setting data or the state storage data is broken, there is a risk of causing problems such as transmission of unnecessary radio waves or transmission exceeding the specified power, and there is a possibility that the software of the radio itself does not operate normally.

  In view of this, there has been considered a wireless device that measures a power supply voltage and notifies that the voltage has dropped when the measured power supply voltage drops (see, for example, Patent Documents 1, 2, 3, and 4). In this configuration, it is necessary for the user to deal with the setting data and the state storage data so as not to be broken in accordance with the notified information.

  A wireless device that automatically prevents setting data and state storage data from being broken is also considered. With reference to FIG. 3 to FIG. 5, a conventional radio having a function of preventing data from being damaged when the power supply voltage is lowered will be described. As an example, a wireless device that is a wireless communication terminal will be described. FIG. 3 shows a configuration around the control microcomputer 10 in a conventional wireless device.

  As shown in FIG. 3, the conventional wireless device includes a control microcomputer 10, a program nonvolatile memory 21A, a volatile memory 22, a data nonvolatile memory 23A, a voltage detector 24, a DC power supply 25, a grounding unit 26, and the like. Is done. The control microcomputer 10 includes a CPU (Central Processing Unit) 11, an AD (Analog to Digital) converter 12, and an interrupt factor processing circuit 13.

  The control microcomputer 10 controls each part of the wireless device. The CPU 11 executes various processes in cooperation with a program read from the program nonvolatile memory 21 </ b> A and developed in the volatile memory 22. The AD converter 12 converts the analog power supply voltage of the DC power supply output from the DC power supply 25 into a digital power supply voltage, and outputs the voltage value of the power supply voltage to the CPU 11. The interrupt factor processing circuit 13 outputs an interrupt signal to the CPU 11 when an interrupt factor corresponding to the output signal of the voltage detector 24 is generated.

  The program nonvolatile memory 21A is a nonvolatile memory such as a ROM (Read Only Memory) in which various programs are stored. In the program nonvolatile memory 21A, the stored data (program) is not erased even when the power supply is cut off. The program non-volatile memory 21A stores a first voltage drop monitoring program or a second voltage drop monitoring program described later.

  The volatile memory 22 is a RAM (Random Access Memory) and has a work area for storing programs and data. The volatile memory 22 erases stored data (program, data) when the power supply is cut off.

  The data non-volatile memory 23A is a non-volatile memory such as an EEPROM (Electrically Erasable and Programmable ROM) or a flash memory in which various data are stored. Data stored in the data non-volatile memory 23A is not erased even when the power supply is cut off.

  Voltage detector 24 detects the power supply voltage outputted from the DC power source 25, and inverted to a low if it becomes less than the first threshold value the detected voltage reaches a predetermined, also becomes equal to or higher than the first threshold In the case of an output, a logic signal of output logic that is inverted to high is output to the interrupt factor processing circuit 13. Voltage detector 24 outputs a normal power supply output logic high signal when the detection voltage and the output logic lower than the first threshold value is inverted to a low, the detection voltage in this state is smaller than the first threshold value As a result, the output logic is inverted high. The first threshold is the threshold voltage of whether the voltage drop, as described in the second voltage drop monitoring process to be described later, when the voltage drop, erase data to the data for the non-volatile memory 23A Alternatively, it becomes a threshold voltage value indicating whether or not to execute the write stop processing. When the logic signal becomes low, the process of erasing or writing data to the data nonvolatile memory 23A is executed due to the voltage drop.

  DC power supply 25 is a DC power source such as an internal battery, and outputs the DC power supply voltage to each section of the wireless device 1 (feed), and outputs the DC power supply voltage to the AD converter 12 and the voltage detector 24.

  Next, the operation of the radio shown in FIG. 3 will be described with reference to FIGS. FIG. 4 shows the flow of the first voltage drop monitoring process. FIG. 5 shows the flow of the second voltage drop monitoring process.

  The first voltage drop monitoring process shown in FIG. 4, the power supply voltage is monitored on the basis of the power supply voltage value obtained by the AD converter 12, if the power supply voltage decreases, the setting data or the state of the data for the non-volatile memory 23A This is a process of canceling data erasure or writing.

  As the data non-volatile memory 23A, an EEPROM, a flash memory or the like having a long erase / write time is used. For this reason, there is a risk that the voltage of the DC power supply 25 may be interrupted or lowered for some reason during the erasing / writing of the setting data or the state storage data. In this case, the power supply to the control microcomputer 10 and the data non-volatile memory 23A is cut off during the data erasing or writing, so that the setting data or the state storage data being erased / written may be destroyed. For this reason, the erasure or writing of the setting data or the state storage data is stopped before the voltage of the DC power supply 25 is cut off or lowered.

  For example, the first voltage drop monitoring program read from the program nonvolatile memory 21 </ b> A and developed in the volatile memory 22, triggered by the power on of the wireless device being turned on, and the CPU 11 cooperate with the first voltage drop monitoring program. The voltage drop monitoring process is executed.

  First, main routine processing is executed (step S21). The main routine process is a series of operation control processes for each circuit unit in the wireless device. Then, the setting data or status data related to the main routine process executed in step S21 is erased or written in the data nonvolatile memory 23A (step S22).

  Then, the AD converter 12 is controlled (step S23). Then, the voltage value of the power supply voltage output from the DC power supply 25 is acquired from the AD converter 12 (step S24). And it is discriminate | determined whether the voltage value acquired in step S24 is more than a predetermined (predetermined) threshold value (step S25). The predetermined threshold value in step S25 is a threshold voltage value indicating whether or not to execute the data erasure or write stop processing to the data nonvolatile memory 23A when the voltage drops.

  When the voltage value is equal to or greater than a predetermined threshold (step S25; YES), the process proceeds to step S21. If the voltage value is not equal to or greater than the predetermined threshold value (step S25; NO), the process of erasing or writing the setting data or the state data to the data nonvolatile memory 23A is executed (step S26), and the first voltage drop monitoring process Ends. After the execution of step S26, the radio can be stopped due to the interruption or reduction of the voltage of the DC power supply 25.

  Next, a configuration for executing the second voltage drop monitoring process instead of the first voltage drop monitoring process will be described. Second voltage drop monitoring process shown in FIG. 5, the power supply voltage is monitored on the basis of the output signal of the voltage detector 24, when the supply voltage decreases, erasing the setting data or the status data to the data for the non-volatile memory 23A or This is a process of canceling writing.

  For example, the second voltage drop monitoring program read from the program nonvolatile memory 21 </ b> A and developed in the volatile memory 22, triggered by the power on of the radio being turned on, and the CPU 11 cooperate with the second voltage drop monitoring program. The voltage drop monitoring process is executed.

  First, main routine processing is executed (step S31). Then, the setting data or status data relating to the main routine process executed in step S31 is erased or written in the data nonvolatile memory 23A (step S32), and the process proceeds to step S31.

If the output logic of the voltage detector 24 becomes low during the execution of steps S31 and S32, an interrupt signal is output to the CPU 11 by the interrupt factor processing circuit 13, an interrupt is generated according to the interrupt processing, and the data nonvolatile memory The process of erasing or writing the setting data or status data to 23A is executed (step S33), and the second voltage drop monitoring process ends.
Japanese Patent Laid-Open No. 3-145340 JP 2001-103136 A JP-A-11-168533 Japanese Patent Laid-Open No. 11-8938

  However, in the conventional first voltage drop monitoring process, before the execution of the process of erasing or writing the setting data or status data to the data nonvolatile memory 23A, the radio is stopped due to the interruption or reduction of the voltage of the DC power supply 25. Could occur. FIG. 6A shows the flow of the power supply voltage value and software processing at the normal time in the first voltage drop monitoring process. FIG. 6B shows a flow of the power supply voltage value and the software process at the time of abnormality in the first voltage drop monitoring process. FIG. 6 (a), the the horizontal axis of FIG. 6 (b), the course direction of the direction from left to right time, also in the longitudinal axis of the power supply voltage value, small power supply voltage value direction from bottom to top It is assumed that the direction is the same from FIG. 7 to FIG.

  As shown in FIG. 6A, the power supply voltage output from the DC power supply 25 is reduced during the normal operation of the first voltage drop monitoring process, for example, during the control of the AD converter 12 (step S23). Then, after the data erasure or write stop processing (step S26) in the data nonvolatile memory 23A is completed, the wireless device stops.

  On the other hand, as shown in FIG. 6B, during the execution of the first voltage drop monitoring process, for example, during the data erasing or writing to the data nonvolatile memory 23A (step S22), the data is output from the DC power supply 25. Therefore, there is a possibility that the wireless device may stop before the erasing or writing stop processing (step S26) in the data nonvolatile memory 23A is completed.

  Further, during the execution of the first voltage drop monitoring process, for example, during the main routine process (step S21) where the process is heavy and the process occupation time is long, the power supply voltage output from the DC power supply 25 is cut off or There is a risk that the radio will stop before the voltage value is acquired from the AD converter 12 (step S23) or the data erasure or write stop processing (step S26) to the data nonvolatile memory 23A is completed. It was.

  In the conventional second voltage drop monitoring process, the radio before the completion of the data erasure or write stop process to the data nonvolatile memory 23A in the first voltage drop monitoring process does not stop. FIG. 7 shows the flow of the power supply voltage value and the software process in the second voltage drop monitoring process.

  As shown in FIG. 7, even if the power supply voltage output from the DC power supply 25 is reduced during execution of the second voltage drop monitoring process, for example, during the execution of the main routine process (step S31), an interrupt is made. Thus, a data erasure or write stop process (step S33) to the data non-volatile memory 23A is executed, and the wireless device stops after the completion.

  This is because the second voltage drop monitoring process uses the interrupt factor processing circuit 13, which is a built-in function of the control microcomputer 10, and is significantly faster than the first voltage drop monitoring process to transfer data to the data nonvolatile memory 23A. This is because the erasure or write stop process starts to be executed.

  However, in the second voltage drop monitoring process, the voltage value rise from the DC power supply 25 after the execution of the process of erasing or writing the setting data or the state data to the data nonvolatile memory 23A at the time of the voltage drop, There is a risk that the value will decrease again, and data erasure or write stop processing will be executed again. FIG. 8 shows a flow of the power supply voltage value and the output logic of the voltage detector 24 in the second voltage drop monitoring process when the power supply voltage value changes from a drop to an increase.

  As shown in FIG. 8, when the second voltage drop monitoring process is executed, an interrupt occurs when the power supply voltage output from the DC power supply 25 drops and the output logic of the voltage detector 24 is inverted to low at time t1. Thus, the process of erasing or writing data to the data nonvolatile memory 23A is executed. Thereafter, when the DC power supply 25 recovers and the power supply voltage rises, the output logic of the voltage detector 24 is inverted to high at time t2, and the main routine process is executed again.

  FIG. 9 shows the flow of the power supply voltage value and the output logic of the voltage detector 24 when a power supply voltage drop occurs while the power supply voltage is rising. When the execution of the main routine process is started at time t2 shown in FIG. 8, there is a possibility that a phenomenon occurs in which the voltage value of the DC power supply 25 instantaneously decreases (voltage value V3) as shown in FIG. This is because, in the main routine processing, a circuit other than the periphery of the control microcomputer 10 such as a wireless communication transmitter / receiver and an operation display unit not shown in FIG. Because it ends up. As a result, the power supply voltage output from the DC power supply 25 slightly decreases.

  The power supply voltage output from the DC power supply 25 due to this large current tends to decrease significantly as the current consumption of the circuit units other than the periphery of the control microcomputer 10 increases, and the voltage value V3 of the voltage detector 24 When the value falls below the first threshold, an interrupt factor is generated again in the control microcomputer 10, and there is a possibility that the processing routine for stopping the radio (step S33) may be entered.

FIG. 10 shows the flow of the power supply voltage value and the output logic of the voltage detector 24 at the offset of the main routine process start voltage. In order to avoid the execution of data erasure or write stop processing based on a decrease in power supply voltage value while the power supply voltage value is rising in FIG. 9, as shown in FIG. A method of offsetting the main routine processing start voltage so as not to fall below the first threshold value of the voltage detector 24 even if the voltage value drop of the DC power supply 25 involved is anticipated in advance and the voltage drop is induced can be considered. . By offsetting the main routine processing start voltage, execution of the main routine processing is started at time t3 after time t2, and the voltage value V4 at the subsequent voltage drop becomes the first threshold value of the voltage detector 24. Never fall below.

  However, the voltage detector 24 used for the purpose of blocking or lowering the detection of the power supply voltage is adjusted so as to increase the voltage detection accuracy when the voltage drop, but high voltage detection accuracy during voltage drop, when a voltage rise Generally, the voltage detection accuracy is low. FIG. 11A shows variations in the power supply voltage value and the output logic of the voltage detector 24 when the power supply voltage drops. FIG. 11B shows variations in the power supply voltage value and the output logic of the voltage detector 24 when the power supply voltage rises.

  As shown in FIG. 11A, when the power supply voltage output from the DC power supply 25 is lowered, the voltage detector 24 detects the voltage with extremely high accuracy (± 1%), and the variation in the logic inversion of the voltage detector 24 varies. Zone Z1 is also relatively small. However, as shown in FIG. 11B, when the power supply voltage output from the DC power supply 25 rises, the voltage detector 24 detects the voltage very roughly (± 3 to 8%), and the logic inversion of the voltage detector 24 is detected. The variation zone Z2 is also relatively large. In recent years when the voltage of circuit elements has been remarkably lowered, variations in the logic inversion of the voltage detector 24 cannot be ignored.

  It is an object of the present invention to accurately prevent execution of data erasure or write stop due to a voltage drop at the start of operation of a radio device while the power supply voltage is rising.

In order to solve the above problems, the wireless device of the present invention
A storage unit capable of erasing and writing data;
A power supply that outputs a power supply voltage;
And a voltage value output unit that outputs the voltage value of the power supply voltage the power supply output,
Generating a logic signal that inverts when the voltage value of the power supply voltage output from the power supply is smaller than a first threshold value that is a predetermined threshold voltage value or when the voltage value is greater than or equal to the first threshold value; A voltage detector to output;
It is determined whether or not the logic signal is inverted when the voltage value of the power supply voltage is smaller than the first threshold. When the logic signal is inverted, erasure or writing of data to the storage unit is stopped. After the processing is executed and the voltage value of the power supply voltage becomes smaller than the first threshold value and the logic signal is inverted, the voltage value of the power supply voltage becomes equal to or higher than the first threshold value and the logic signal is inverted. In addition, the voltage value of the power supply voltage output from the voltage value output unit is a voltage generated by a main routine process that controls a series of operations of the own device that consumes more power than a process of erasing or writing data to the storage unit It is determined whether or not a malfunction is caused by the voltage detection unit due to the decrease, whether or not a second threshold value that is a threshold voltage value or not, the logic signal is inverted, and the voltage value of the power supply voltage is More than 2 threshold In some cases, and a control unit for executing the main routine processing.

  According to the present invention, it is possible to accurately prevent execution of data erasure or write stop due to occurrence of a voltage drop at the start of operation of the radio device while the power supply voltage is rising.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

  First, the device configuration of the wireless device 1 of the present embodiment will be described with reference to FIG. FIG. 1 shows an internal configuration of radio apparatus 1 according to the present embodiment.

  The wireless device 1 of the present embodiment is a wireless communication terminal (handy device, in-vehicle device). The wireless device 1 converts a user input voice into an audio signal, modulates the audio signal, transmits the audio signal to a wireless communication terminal (or repeater) as a communication destination, and transmits the radio signal to the wireless communication terminal (or relay device) as a communication destination. This is a radio that receives and demodulates radio waves transmitted from a repeater and outputs the demodulated audio signal as voice.

  As shown in FIG. 1, the wireless device 1 includes a control microcomputer 10, a program nonvolatile memory 21, a volatile memory 22, a data nonvolatile memory 23 as a storage unit, a voltage detector 24 as a voltage detection unit, and a direct current as a power source. The power supply 25, the grounding part 26, the transmission / reception part 27, the operation display part 28, the audio | voice input / output part 29, the signal processing part 30, etc. are comprised. The control microcomputer 10 includes a CPU 11 as a control unit, an AD converter 12 as a voltage value output unit, and an interrupt factor processing circuit 13.

  The control microcomputer 10 controls each part of the wireless device. The CPU 11 executes various processes in cooperation with a program read from the program nonvolatile memory 21 and developed in the volatile memory 22. The AD converter 12 converts the analog voltage signal of the DC power supply output from the DC power supply 25 into a digital voltage signal, and outputs the voltage value of the power supply voltage to the CPU 11. The interrupt factor processing circuit 13 outputs an interrupt signal to the CPU 11 when an interrupt factor corresponding to the output signal of the voltage detector 24 is generated.

  The program non-volatile memory 21 is a non-volatile memory in which various programs are stored, and includes a ROM, an EEPROM, a flash memory, and the like. The program nonvolatile memory 21 does not erase stored data (program) even if the power supply is cut off. The program non-volatile memory 21 stores a second voltage drop monitoring program and a voltage rise monitoring program described later.

  The volatile memory 22 is a volatile memory having a work area for storing programs and data, and includes a RAM such as a DRAM (Dynamic RAM), an SRAM (Static RAM), and an SDRAM (Synchronous DRAM). The volatile memory 22 erases stored data (program, data) when the power supply is cut off. In addition, a RAM such as a DRAM, SRAM, or SDRAM has a very fast data erasing or writing time.

  The data non-volatile memory 23 is a non-volatile memory in which various data are stored so as to be erasable and writable, and is configured by an EEPROM, a flash memory, or the like. Data stored in the data nonvolatile memory 23 is not erased even when the power supply is cut off. Also, EEPROM, flash memory, etc. have a slow data erasing or writing time.

  Further, as shown in FIG. 1, the program nonvolatile memory 21 and the data nonvolatile memory 23 may be configured as a program and data nonvolatile memory 21B as one nonvolatile memory.

  Voltage detector 24 detects the voltage of the DC power supply 25, it goes high when it becomes more than a first threshold the detected voltage is predetermined at a low when the same becomes smaller than the first threshold value An output logic signal is output to the interrupt factor processing circuit 13. That is, the voltage detector 24, the output logic to output a high signal when normal power supply, output logic and the detection voltage becomes lower than the first threshold value is inverted to a low, the detection voltage in this state is the first When rising above the threshold, the output logic is inverted again high. The first threshold is the threshold voltage of whether the voltage drop, as described in the second voltage drop monitoring process, when the voltage drop, erasing or writing of data to the data for the non-volatile memory 23A This is the threshold voltage value for determining whether or not to execute the cancellation process.

  The DC power supply 25 is a DC power supply such as a built-in battery, is connected to the ground unit 26, and outputs (supplies) a DC power supply voltage to each part of the wireless device 1, and also supplies a DC power supply voltage to the AD converter 12 and the voltage detector 24. Is output.

  The transmission / reception unit 27 includes a transmission antenna, a reception antenna, a modulation circuit, a demodulation circuit, and the like. Transceiver 27 is controlled by the control microcomputer 10, and sends the modulated and transmit antenna input audio signal from the signal processing unit 30 to the communication destination of the wireless communication terminal or the repeater as a radio wave, the communication destination radios The radio wave transmitted from is received and demodulated by the transmission antenna, and the demodulated audio signal is output to the signal processing unit 30.

  The operation display unit 28 includes a display unit such as an LCD (Liquid Crystal Display) and an operation unit such as a keypad. The operation display unit 28 receives an operation information input from the user through the operation unit, outputs the operation information to the CPU 11, and displays various display information on the display unit in accordance with a display instruction from the control microcomputer 10.

  The voice input / output unit 29 includes a microphone, a speaker, and the like. Voice input and output unit 29 is controlled by the control microcomputer 10, and outputs to the signal processing unit 30 converts the voice input from the user by the microphone to the audio signal, also an audio signal input from the signal processing unit 30 Output audio from the speaker.

  The signal processing unit 30 includes a DSP (Digital Signal Processor) and the like, performs various signal processing on the audio signal to be transmitted input from the audio input / output unit 29, outputs the signal to the transmission / reception unit 27, and is input from the transmission / reception unit 27. The received audio signal is subjected to various signal processing and output to the audio input / output unit 29.

  Next, the operation of the wireless device 1 will be described with reference to FIG. FIG. 2 shows the flow of the voltage rise monitoring process.

  In the wireless device 1, the second voltage drop monitoring process shown in FIG. 5 is executed. For example, the second voltage drop monitoring program stored in the program nonvolatile memory 21 and the CPU 11 cooperate with the CPU 11 after the power is turned on or triggered by the output logic of the voltage detector 24 being inverted to high. No. 2 voltage drop monitoring process is executed. As described with reference to FIGS. 5 to 8, even if the voltage drop of the DC power supply 25 occurs during the execution of the second voltage drop monitoring process by the second voltage drop monitoring process, an interruption is made. Data erasure or writing stop processing (step S33) to the data non-volatile memory 23A is executed, and the wireless device stops after completion.

  Further, in the wireless device 1, the voltage increase monitoring process is executed in parallel with the second voltage decrease monitoring process. The voltage increase monitoring process is a process for executing the main routine process while preventing interruption due to a voltage drop at the start of the execution of the main routine process while the voltage of the DC power supply 25 is increasing.

  The main routine process executed by the wireless device 1 is a series of operation control processes for each circuit unit in the wireless device 1. The main routine processing, and monitoring of the presence or absence of a user's operation input in the operation display unit 28, a monitoring of the presence of transmission waves at the transmitting and receiving unit 27, and updates the display contents of the operation display unit 28, and other various processes, the It is processing to include. Further, this main routine process is a process that requires a time of several milliseconds to several tens of milliseconds.

  In the wireless device 1, for example, a voltage rise monitoring program stored in the program nonvolatile memory 21 triggered by the output logic of the voltage detector 24 being inverted to low by the second voltage drop monitoring process, and the CPU 11 By the cooperation, the voltage rise monitoring process is executed.

  First, it is determined whether or not the output logic of the voltage detector 24 has been inverted to high (step S11). When the output logic of the voltage detector 24 is not inverted to high (step S11; NO), the process proceeds to step S11.

  When the output logic of the voltage detector 24 is inverted to high (step S11; YES), the voltage value of the DC power supply 25 is acquired from the AD converter 12, and whether or not the voltage value is sufficiently increased by the acquired voltage value. Is determined (step S12). Whether or not the voltage value is sufficiently increased is determined based on whether or not the voltage value of the DC power supply 25 has reached a predetermined second threshold value. According to the second threshold value, the control microcomputer 10 circuit portion other than the peripheral (transceiver 27, the operation display unit 28, voice input and output unit 29, the signal processing section 30, etc.) by operating the instantaneous current generation This is a voltage threshold value as to whether or not a malfunction (the execution of the data erasure or write stop processing (S33) in the data nonvolatile memory 23A) due to the voltage detector 24 (logic signal thereof) due to the voltage drop does not occur.

  When the voltage value is not sufficiently increased (step S12; NO), the process proceeds to step S11. If the voltage value has increased sufficiently (step S12; YES), the main routine process is executed (step S13), and the voltage increase monitoring process ends.

  As described above, according to the present embodiment, in the wireless device 1, when the voltage drops, the voltage value of the power supply voltage output from the DC power supply 25 becomes smaller than the first threshold value and the output logic of the voltage detector 24 becomes low. When the output logic of the voltage detector 24 becomes low, the process of erasing or writing the setting data or the state storage data to the data nonvolatile memory 23 is executed. In the wireless device 1, after the output logic of the voltage detector 24 becomes low, the voltage value of the power supply voltage becomes equal to or higher than the first threshold value, the output logic of the voltage detector 24 is inverted to high, and AD It is determined whether or not the voltage value of the power supply voltage output from the converter 12 is greater than or equal to the second threshold value, the output logic of the voltage detector 24 becomes high, and the voltage value of the power supply voltage is the second threshold value. If so, main routine processing is executed. For this reason, regardless of variations in the output logic of the voltage detector 24, data erasure or write stop due to the occurrence of a voltage drop at the start of main routine processing (at the start of operation of each circuit unit of the wireless device 1) while the power supply voltage is rising. Execution can be prevented accurately.

  Note that the description in the above embodiment is an example of the wireless device according to the present invention, and the present invention is not limited to this.

  In the above embodiment, the wireless device 1 has been described as a wireless communication terminal, but the present invention is not limited to this. For example, the wireless device 1 may be a repeater such as a repeater. When the wireless device 1 is a repeater, the wireless device 1 does not include the voice input / output unit 29, and the transmission / reception unit 27 and the signal processing unit 30 perform wireless relay transmission / reception, and the DC power supply 25 and the grounding unit 26. Becomes a power source unit that converts an AC voltage input from a commercial AC power source into a DC voltage, and similarly, a second voltage drop monitoring process and a voltage rise monitoring process are executed.

  Further, the voltage offset (second threshold value) to be considered in the voltage rise monitoring process of the above embodiment may be set by the user's operation input to the operation display unit 28 by software of the control microcomputer 10. In this configuration, the second threshold value can be freely specified according to the current consumption of each circuit unit such as the transmission / reception unit 27, and convenience can be improved.

  In addition, the detailed configuration and detailed operation of the wireless device 1 in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is a block diagram which shows the internal structure of the radio | wireless machine of embodiment which concerns on this invention. It is a flowchart which shows a voltage rise monitoring process. It is a block diagram which shows the structure around the control microcomputer in the conventional radio | wireless machine. It is a flowchart which shows a 1st voltage drop monitoring process. It is a flowchart which shows a 2nd voltage drop monitoring process. (A) is a figure which shows the timing chart of the power supply voltage value at the time of normal in a 1st voltage drop monitoring process, and the flow of a process of software. (B) is a figure which shows the timing chart of the power supply voltage value at the time of abnormality in the 1st voltage drop monitoring process, and the flow of a process of software. It is a figure which shows the timing chart of the power supply voltage value in the 2nd voltage drop monitoring process, and the flow of a software process. It is a timing chart which shows the power supply voltage value and the output logic of a voltage detector in a 2nd voltage drop monitoring process in the case of changing from a fall of a power supply voltage value to a raise. It is a timing chart which shows a power supply voltage value and the output logic of a voltage detector at the time of power supply voltage value fall generation | occurrence | production while a power supply voltage value is rising. It is a timing chart which shows the power supply voltage value in the offset of a main routine process start voltage, and the output logic of a voltage detector. (A) is a figure which shows the dispersion | variation in the power supply voltage value at the time of a power supply voltage fall, and the output logic of a voltage detector. (B) is a figure which shows the dispersion | variation in the power supply voltage value at the time of a power supply voltage rise, and the output logic of a voltage detector.

Explanation of symbols

1 Radio 10 Control microcomputer 11 CPU
12 AD converter 13 Interrupt factor processing circuit 21, 21 A Program nonvolatile memory 22 Volatile memory 23, 23 A Data nonvolatile memory 21 B Program and data nonvolatile memory 24 Voltage detector 25 DC power source 26 Ground unit 27 Transmitter / receiver unit 28 Operation display unit 29 Audio input / output unit 30 Signal processing unit

Claims (1)

A storage unit capable of erasing and writing data;
A power supply that outputs a power supply voltage;
A voltage value output unit that outputs a voltage value of a power supply voltage output by the power supply;
Generating a logic signal that inverts when the voltage value of the power supply voltage output from the power supply is smaller than a first threshold value that is a predetermined threshold voltage value or when the voltage value is greater than or equal to the first threshold value; A voltage detector to output;
It is determined whether or not the logic signal is inverted when the voltage value of the power supply voltage is smaller than the first threshold. When the logic signal is inverted, erasure or writing of data to the storage unit is stopped. After the processing is executed and the voltage value of the power supply voltage becomes smaller than the first threshold value and the logic signal is inverted, the voltage value of the power supply voltage becomes equal to or higher than the first threshold value and the logic signal is inverted. In addition, the voltage value of the power supply voltage output from the voltage value output unit is a voltage generated by a main routine process that controls a series of operations of the self-machine that consumes more power than a process of erasing or writing data to the storage unit. It is determined whether or not a malfunction is caused by the voltage detection unit due to the decrease, whether or not a second threshold value that is a threshold voltage value or not, the logic signal is inverted, and the voltage value of the power supply voltage is the first voltage value. More than 2 threshold In some cases, radio and a control unit for executing the main routine processing.

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