JP2003216290A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal device capable of greatly reducing power consumption of a primary battery even if the primary battery such as a dry battery is used as a power supply. <P>SOLUTION: A barcode handy terminal (BHT) 11 is composed primarily of a CPU 16 as a microprocessor. If a PW key is turned off, the CPU 16 turns off an output of a power control circuit 13 (CPU 16 is in nonactive state). The CPU 16 turns on the output of the power control circuit 13 by a fixed-time interrupt from an RTC (real time clock) circuit 14 and feeds power to circuits other than the RTC circuit 14 and a PW key detection circuit (CPU 16 is in operating state). In such a case, if the CPU 16 receives a communication request from an external device 2 and establishes communication, remote wakeup processing is carried out, and if communication is not established during a standby time T2, the output of the power control circuit 13 is turned off again to stop power feeding. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal device capable of performing a predetermined process by supplying power to a microprocessor.

[0002]

Conventionally, as shown in FIG. 8, a portable terminal device A is mounted on, for example, a stand 1 having a charging function, so that an external device 2 connected to the stand 1 is provided.
It is configured to communicate with. This type of mobile terminal device A
When using, the portable terminal device A is rarely placed on the mounting table 1 with a charging function during normal portable use, and is often operated by the portable terminal device A alone. Then, for example, when a predetermined communication process with the external device 2 is necessary or when the user wants to charge the battery, the external device 2 is placed on the stand 1, and the external device 2
Communication operation with will be done. For example, a bar code handy terminal (hereinafter referred to as B
In the case of (HT)), a mode of performing communication processing with the external device 2 after the completion of the normal work is mainly used.

Further, the above-mentioned portable terminal device A has a function of accepting a communication interruption by, for example, infrared communication with the external device 2 in an operating state in which a normal operation is performed or in a standby state in which current consumption of a circuit is reduced. There is. In this case, for example, when the power supply is turned off by a user operation,
The microprocessor controlling the mobile terminal device A is
When the external device 2 is interrupted by shifting from the operating state to the standby state, the mobile terminal device A has a function of transitioning to the operating state and establishing communication with the external device 2.

The reason for doing this is that the current consumption becomes particularly large in the operating state. By reducing the current consumption by putting the microprocessor or the like in the standby state, the current consumption of the entire portable terminal device is reduced. This is because it can be suppressed.

In this case, if the portable terminal device A is placed on the table 1 with a charging function, the portable terminal device A is always charged, so that it can maintain the standby state.
It is possible to wait for establishment of communication with the external device 2.

By the way, in recent years, a primary battery such as a dry battery has been used as a power source for this kind of portable terminal device A for convenience, and along with this, a rechargeable secondary battery which has been conventionally used is carried. Even when it is used as a power source for the terminal device A, there is an increasing demand for further reduction in power consumption. Therefore, when the above-mentioned battery is used as a power source, there is a problem that power consumption is great and it is not possible to obtain a practical use state.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a portable terminal device capable of significantly reducing the power consumption of a battery even when a primary battery such as a dry battery is used as a power source. To provide.

[0008]

In order to solve the above-mentioned problems, according to the portable terminal device of claim 1, when the power-off is instructed, the power control means is turned off and the power is supplied from the battery. To disable the power supply to the microprocessor. In this case, when the activation means turns on the power supply control means at a predetermined cycle, and the microprocessor is operating and receives a processing request from an external device, the predetermined processing is executed. On the other hand, the power supply control means is turned off, the activation means turns on the power supply control means at a predetermined cycle, and turns off the power supply control means when the microprocessor does not receive a processing request from an external device within a predetermined waiting time. For example, when it is confirmed that a predetermined time has elapsed by the power-off being instructed and the start-up means being started a predetermined number of times in a predetermined cycle, the power-off means keeps the power-supply control means off. Since the power supply is cut off, the power consumption of the battery can be reduced. Therefore, it is possible to reduce the power consumption as compared with the conventional one in which the standby state is maintained and the power is constantly consumed, and even when the primary battery such as a dry battery is used as a power source, the power consumption of the primary battery can be significantly reduced. it can.

According to the portable terminal device of the second aspect, since the microprocessor turns off the power supply control means when the predetermined processing is executed, the power consumption of the battery is reduced even after the predetermined processing is executed. be able to.

According to the portable terminal device of the present invention, since the activation means is provided so that the activation time interval and the number of activations can be set arbitrarily, the time for which the power supply is cut off by the user who uses the portable terminal device. Can be set arbitrarily.

According to the portable terminal device of the present invention, the microprocessor sends an inquiry signal to the external device when the microprocessor is activated in response to turning on of the power supply control means, but the external device sends the inquiry signal within the waiting time. When the processing request responding to the inquiry signal is accepted, the predetermined processing is executed. On the other hand, the microprocessor turns off the power supply control means when it does not accept the processing request within the waiting time for establishing communication with the external device when the inquiry signal is transmitted.

According to the portable terminal device of the sixth aspect, the microprocessor adds the time information indicating the time for sending the next inquiry signal together with the inquiry signal to the external device and sends the inquiry signal. Upon receiving the information, the external device can acquire the time information when the next inquiry signal is transmitted even if the external device cannot receive the inquiry signal. Therefore, the external device waits for the inquiry signal at the timing at which the next inquiry signal is sent, so that the external device can reliably receive the inquiry signal and establish communication next time.

According to the portable terminal device of the present invention, when the microprocessor is activated, it shifts to a standby state, and when an interrupt is accepted in the standby state, it shifts to an operating state and executes predetermined processing. The low power consumption state can be maintained. Therefore, low power consumption is maintained in a state where the power is activated by the activation means, and the power consumption can be further reduced.

According to the portable terminal device of the eighth aspect, when the power-off is instructed in the operating state of the microprocessor, the microprocessor enters a standby state, for example, a low power consumption state. In this case, when an interrupt is accepted in the standby state, predetermined processing is executed, but if a predetermined time elapses without accepting the interrupt, the power-off means holds the power control means in the off state and cuts off power supply to the microprocessor and the like. Therefore, the power consumption of the battery can be reduced. Therefore, it is possible to reduce the power consumption as compared with the conventional one in which the standby state is maintained and the power is constantly consumed, and even when the primary battery such as a dry battery is used as a power source, the power consumption of the primary battery can be significantly reduced. it can.

According to the portable terminal device of the ninth aspect, the microprocessor turns off the power supply control means when the predetermined processing is executed, so that the power consumption of the battery can be reduced even after the predetermined processing is executed. You can

According to the mobile terminal device of claim 11,
The activating means activates the microprocessor in a predetermined cycle, the microprocessor sends an inquiry signal to the external device when it is activated from the standby state, and when the processing request from the external device in response to the inquiry signal is accepted, The processing is executed, but if the processing request is not accepted within the predetermined waiting time, the processing returns to the standby state.

According to the portable terminal device of claim 12,
Since the microprocessor adds time information together with the inquiry signal and sends it, when the external device receives the time information, the external device sends the next inquiry signal even if it cannot receive the inquiry signal. Can be obtained. Therefore, the external device waits for the inquiry signal at the timing at which the next inquiry signal is sent, so that the external device can reliably receive the inquiry signal and establish communication next time.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) Hereinafter, the present invention is applied to a primary battery drivable type mobile terminal device as a first embodiment of a mobile terminal device with reference to FIGS. 1 to 3. explain. It is to be noted that the same parts as those of FIG. 8 described in the prior art are denoted by the same reference numerals and the description thereof will be omitted. FIG. 1 schematically shows an electrical configuration of a barcode handy terminal. The bar code handy terminal (primary battery drivable type mobile terminal device: hereinafter referred to as BHT) 11 is connected to the bar code or two-dimensional code decoding process, various data processes, storage, and externally via the stand 1. It has a communication function with the external device 2 (see FIG. 8).

The BHT 11 is constructed so that a dry battery (primary battery) can be used as the main power source 12 in a cartridge type, for example. The BHT 11 is configured such that a secondary battery such as a nickel hydrogen battery can be applied to the main power source.

The main power source 12 by the dry battery is adapted to be inputted to a power source control circuit 13 as a power source control means, and the power source control circuit 13 is inputted on the basis of signals from respective circuits described later. The main power supply 12 is controlled to be turned on and off, and the power supply from the main power supply 12 is switched between valid and invalid and output to the output terminal. The output terminal of the power supply control circuit 13 is connected to each circuit constituting the BHT 11 except the RTC (real time clock) circuit 14 as a starting means and a PW key detection circuit described later, and the power supply control circuit 13 is turned on. In this case, the output of the power supply control circuit 13 is supplied to each connected circuit.

On the contrary, when the power supply control circuit 13 is off and the main power supply 12 is off-controlled, power is not supplied to each circuit. Also, RT
The C circuit 14 includes, for example, a sub power source 15 using a button battery.
And is configured to be operable even when the power supply control circuit 13 is off.

The output power source of the power source control circuit 13 is a CPU (standby shift means, power source off means) 16 as a microprocessor, an IrDA module 17, a gate array 1.
8, IrDA modulation / demodulation circuit 19 and IrDA module 2
0 is mainly supplied. CPU1
An IrDA modulation / demodulation circuit 17, a gate array 18, and a PW key detection circuit 19 are connected to the circuit 6. Furthermore, C
The PU 16 has various memories (EEPROM,
(ROM, RAM, etc.) are connected, and the CPU 16 operates according to a program stored in this memory. The CPU 16 is in a non-operating state when the power supply is cut off, and is activated and is in an operating state when the power supply is supplied. The CPU 16 is also configured to be able to shift to a standby state in which the internal clock is stopped and a low power consumption state is set by an operation program or the like.

In the non-operating state, the CPU 16 does not operate, and communication with the external device 2 cannot be established. Further, in the operating state, the CPU 16 is configured to be able to establish communication with the external device 2 and perform communication processing (predetermined processing), perform normal operation processing, and control each circuit described later. It has become. Further, in the standby state, the CPU 16 effectively operates the external interrupt for the NMI terminal although the internal clock stops.
It is configured to monitor interrupts on the MI terminal.

The CPU 16 is configured to be able to transmit data to the IrDA modulation / demodulation circuit 17 via an SCI (serial interface) terminal in an operating state in which power is supplied. In this case, the IrDA modulation / demodulation circuit 17 modulates the data. , L provided in the IrDA module 20
The mounting table 1 and the external device 2 (see FIG. 8) via a light projecting element such as an ED.
(See) and infrared communication.

When the IrDA modulation / demodulation circuit 17 receives a data modulation signal from the external device 2 via the light receiving element of the IrDA module 20, the IrDA modulation / demodulation circuit 17 demodulates the data modulation signal and transmits it to the SCI terminal of the CPU 16 as data. ing. The CPU 16 is SCI in the operating state.
The terminal receives the data.

Further, when the IrDA modulation / demodulation circuit 17 receives the external interrupt modulation signal from the external device 2 via the light receiving element of the IrDA module 20, the IrDA modulation / demodulation circuit 17 demodulates the external interrupt modulation signal to obtain the external interrupt signal.

The gate array 18 is an interrupt processing circuit 18
In addition to the above, a key scan circuit of a keypad (not shown) having ten or more keys, a load drive circuit for a connected buzzer or motor, and an illumination unit (light emitting LED) It is composed of a timer circuit and the like. The interrupt processing circuit 18a is adapted to receive the above-mentioned external interrupt signal. The CPU 16 is configured to be capable of transmitting and receiving to and from the RTC (real time clock) circuit 14 via the gate array 18.
6 and the gate array 18 are connected to each other by a bus.

The interrupt processing circuit 18a outputs an interrupt signal to the NMI terminal of the CPU 16 when receiving an external interrupt signal. In this case, the CPU 1
6 generates an NMI interrupt and activates the operating state.

The input terminal of the CPU 16 is PW (power)
It is connected to the key detection circuit 19. The PW key detection circuit 19 is powered by the sub power supply 15,
This is a circuit for detecting the state of the key, and the CPU 16 can detect the state of the PW key via the input terminal.

The RTC circuit 14 includes a PW key detection circuit 19
When the PW key is detected to be off by means of, the ON signal (fixed cycle interrupt signal) is transmitted to the power supply control circuit 13 at a predetermined cycle.

The above-mentioned power supply control circuit 13 controls the PW key state detected by the PW key detection circuit 19, the fixed cycle interrupt signal transmitted by the RTC circuit 14, and the CPU 1.
The output of the power supply control circuit 13 is controlled in accordance with the signal output from the output terminal 6 to switch the power supply from the main power supply 12 between enable / disable.

The CPU 16 and the gate array 18 include, for example, an illuminating unit that irradiates a reading object on which a bar code is located, a light receiving unit that reflects the reading object and receives light, an operating unit having a keypad, a liquid crystal display device, and the like. (Neither is shown) is connected, and the bar code or the two-dimensional code located at the reading target is read and decoded to be decoded.

The operation of the above structure will be described with reference to FIGS. FIG. 2 shows a flowchart of a schematic operation when the main power supply is turned off from the operating state of the BHT 11. Further, FIG. 3 shows a timing chart at this time.

The BHT 11 is operated by a user by carrying it,
For example, it is assumed that the PW key is turned off (power off command is issued) and the PW key is placed on the stand 1 after the barcode reading process is performed. At this time, the CPU 16 detects that the PW key has been turned off, and determines whether or not RWU (remote wakeup: activation by an external interrupt) is permitted (step S1). Whether this RWU is authorized or not
It is set in advance by the user operating the BHT 11. Here, if the RWU is not permitted, the CPU 16 transmits a signal for turning off the power to the power supply control circuit 13 via the output terminal, and the power supply control circuit 13 turns off the output (step S2) and ends. . Therefore, the processing ends without accepting the communication request (startup request) from the external device 2.

At step S1, the CPU 16 reads R
When it is determined that the WU is permitted, the activation time interval T1 is set (step S3). The activation time interval T1 is a parameter that is arbitrarily set in advance by, for example, a user operating the keypad, and is set for a time of, for example, about 1 minute, and indicates a cycle of the activation time when the power supply is turned off. (See Figure 3). When the activation time interval T1 is set, whether or not the next activation can be performed in the register as the activation setting unit provided in the RTC circuit 14,
The time until the next startup is set arbitrarily.

The CPU 16 then activates the RTC circuit 14 via the gate array 18 with the activation time interval T1 set, and the RTC circuit 14 initiates and activates the generation of a fixed-cycle interrupt (step S4). And the CPU 16
The power supply control circuit 13 is turned off based on the control output of (1), the output power supply is turned off, and the power supply other than the RTC circuit 14 and the PW key detection circuit 19 is cut off. In this case, the CPU
16 shifts to a non-operating state in response to the power cut (step S5).

The power supply control circuit 13 turns on the output power supply at every activation time interval T1 of the periodic interrupt by the RTC circuit 14. That is, the RTC circuit 14 is the power control circuit 1
The circuit such as the CPU 16 connected to the output terminal of No. 3 is activated at every activation time interval T1. Therefore, after the power supply control circuit 13 is turned off in step S5, when the activation time interval T1 elapses (step S6), the output of the power supply control circuit 13 is turned on, and the CPU 16 enters the operating state (step S7).

When the CPU 16 is in the operating state, initial setting and the like are performed (step S8), and it is determined whether or not the activated factor is a fixed cycle interrupt (step S9). CP
If the U16 determines that there is no factor in the fixed cycle interrupt, the other starting means (different from the starting means in the present invention).
Check whether or not there is a factor (step S1)
0). In this case, as other activation means (interruption factor), the PW key detection circuit 19 detects an ON operation of the PW key to cause an interruption in the CPU 16, or an alarm coincidence activated by the RTC 14 at a designated time. There is an interrupt. When this kind of interrupt occurs,
The power supply control circuit 13 controls the output to be turned on in response to a command from the CPU 16, and completes the startup operation by the fixed cycle interrupt.

On the other hand, in step S9, the CPU 16
When it determines that the activated factor is a fixed-cycle interrupt,
IrDA of the IrDA modulation / demodulation circuit 17 and the IrDA module 20 is initialized (step S11). Then, the CPU 16 sets the waiting time T2 of the communication request (corresponding to the processing request of the present invention) from the external device 2 in the internal timer (step S12). The waiting time T2 is arbitrarily set as a parameter in advance by the user operating the keypad, and indicates the duration of the operating state in which each circuit including the CPU 16 is activated from the non-operating state (see FIG. 3). The waiting time T2 is equal to the external device 2
As a time to wait for a communication request from the CPU 16, it is set in a register as a standby setting unit provided inside the CPU 16. Then, the CPU 16 waits for a communication request from the external device 2, and the IrDA module 20 and the IrDA modulation / demodulation circuit 1
It is determined whether or not the RWU request (processing request) has been accepted via step 7 (step S13).

The CPU 16 at step S13
If the RWU request is not accepted, the standby time T2, which is the duration of the operating state, elapses (step S14: Yes).
And waits until the RWU request is received (Fig. 3). Therefore, at the timing shown in FIG.
However, if the communication request is not sent, the CPU 16 does not accept the communication request and increments the activation number variable n (step S15), and determines whether the activation number variable n is equal to or more than the activation number N (step S15). S16). The number of activations N is arbitrarily set as a parameter in advance by the user operating the keypad, for example. Further, the number of times N of activation is set in a register provided inside the CPU 16.

At the point of time in FIG. 3, since the activation number variable n is not equal to or greater than the activation number N, the power supply control circuit 13 turns off the output, and the CPU 16 becomes inactive (step S17). After that, when the time obtained by subtracting the standby time T2 from the activation time interval T1 elapses, a fixed-cycle interrupt of the RTC circuit 14 occurs, and the processing of steps S7 to S18 is repeated. Therefore, when the external device 2 does not send the communication request at the time point shown in FIG. 3, the processes of steps S7 to S18 are further repeated, and at the time point, the external device 2 sends the communication request. However, since the CPU 16 is in the non-operating state, the timing does not match and the CPU 16 does not accept the communication request. When the external device 2 does not send the communication request, as in the time point, the CPU 16 does not accept the communication request, the output of the power supply control circuit 13 is turned off, and the power supply is cut off.

At this point, if the external device 2 sends a communication request while the CPU 16 is operating, the timings match, and if the RWU request is accepted in step S13, the remote wakeup process (predetermined process) is performed. Perform (step S19). The remote wake-up process is omitted here, but the update process of the master file and application program inside the BHT1 and the BH1 process are omitted.
For example, one day's worth of data stored in T1 is stored in the external device 2
The process etc. which are transmitted to FIG.

In this case, for example, if the timings do not match at the time point and the timings do not match even if the above-described processing is repeated N times for the set number of activations, it is determined as Yes in step S16. It
In this case, the CPU 16 determines that the predetermined time has passed since the power-off was commanded, and for example, the CPU 16 stops the fixed-cycle interrupt by the RTC circuit 14 via the gate array 18 (step S20), and the CPU 16 causes the power-supply control circuit. By controlling the output of 13 to be off, the CPU 16 becomes inactive (step S21), and this state is maintained.

After the remote wakeup process is performed in step S14, the CPU 16 transmits an off signal via the output terminal, and the power supply control circuit 13 controls the output to be held off and cuts off the power supply. Is also good. Such a remote wake-up process is often carried out immediately after the user has finished working on the BHT 11 and immediately after the user has placed it on the stand 1 or during the night when no work is being performed. When it is activated next time such as tomorrow morning, it is started by, for example, a PW key operation by the user (PW key interrupt) or a designated time activation (alarm coincidence interrupt), so it is possible to reduce power consumption while the BHT 11 is not used.

According to such a first embodiment, the PW
When the key is turned off, power supply to circuits (CPU 16 and the like) other than the RTC circuit 14 and the PW key detection circuit 19 is stopped, the RTC circuit 14 turns on the power supply control circuit 13 at a predetermined cycle, and the CPU 16 causes the external device 2 to operate. The communication request from the external device 2 is monitored, a predetermined communication process is executed when the communication request is received from the external device 2, and the power supply control circuit 13 is turned off when the communication request is not received within a predetermined time. Therefore, it is possible to reduce the power consumption compared to the conventional case where the standby state was maintained and the power was constantly consumed, and to obtain a usage state that can be practically used even if a primary battery such as a dry battery is used as a power source. be able to.

Further, since the number of activations N, the activation time interval N1 and the waiting time T2 are arbitrarily set, the BHT11
The time when the power supply is turned off is arbitrarily set by the user who uses, and the versatility is improved.

In response to a communication request from the external device 2,
When the CPU 16 transmits an off signal through the output terminal after the predetermined communication processing and the power supply control circuit 13 controls the output to the off state and cuts off the power supply, P
Since the power supply to the parts other than the W key detection circuit 19 and the RTC circuit 14 is cut off, the power of the primary battery is not consumed after performing the predetermined communication process, and the power consumption of the primary battery can be further reduced.

The CPU 16 is activated to the operating state in step S7, and the initialization process (CP
After the (U initial setting, etc.) is performed, for example, the CPU 16 may shift to the standby state between the processing of step S13 and the processing of step S14. In this case, it is possible to wait for the establishment of communication with the current consumption reduced, and it is possible to further reduce the power consumption of the primary battery.

(Second Embodiment) FIGS. 4 and 5 show a second embodiment of the present invention. The difference from the first embodiment is that the power supply to the CPU 16 is instructed to be turned off. In the standby state, the CPU 16 is maintained so that communication with the external device 2 can be established, and after a lapse of time, the power is turned off and held. The same parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described below.

FIG. 4 shows the electrical configuration of the BHT 11. Unlike the description of the first embodiment, the RTC circuit 14 is not connected to the power control circuit 13 but is connected to the interrupt processing circuit 18a of the gate array 18,
The fixed-cycle interrupt signal of the TC circuit 14 is supplied to the gate array 18
Of the interrupt processing circuit 18a.

The interrupt processing circuit 18a uses the external interrupt signal from the IrDA modulation / demodulation circuit 17 or the RTC circuit 14.
Select the fixed-cycle interrupt signal from the
When an interrupt signal is output to the MI terminal, the CPU 16
Generates an NMI interrupt and activates the NMI interrupt.

Since other structures are substantially the same as those of the first embodiment, the description thereof will be omitted and the operation of the above structure will be described with reference to FIG. FIG. 5 is a flow chart of a schematic operation when the main power supply is turned off from the operating state of the BHT 11.

When the PHT key is turned off and the BHT 11 is placed on the stand 1 after the BHT 11 is carried by the user and the bar code is read, for example, the CPU 16 detects that the PW key is turned off from the input terminal. Then, it is determined whether the RWU is permitted (step U1). CPU
If the RWU is not permitted, 16 transmits a signal for off control to the power supply control circuit 13 via the output terminal, and the power supply control circuit 13 turns off the output (off state) (step U2) and ends. To do.

On the other hand, when the CPU 16 determines in step U1 that the RWU is enabled, it enables the external interrupt from the IrDA modulation / demodulation circuit 17 in the interrupt processing circuit 18a (step U3), and the CPU 16 and each circuit (IrDA modulation / demodulation circuit 17). , Gate array 18, IrD
The A module 20) shifts to a standby state, for example, according to an instruction from the CPU 16 (step U4).

In the standby state, the CPU
When 16 generates an NMI interrupt by the RTC circuit 14 (step U5), the operation state is entered. And CPU
16 receives an external interrupt from the IrDA modulation / demodulation circuit 17 in an operating state (step U6: Yes), and when a communication request is received (step U7: Yes), the communication request is received to establish communication and remote wakeup. A process is performed (step U8), the output of the power supply control circuit 13 is turned off (off state), and the process ends. CPU16
When determining No in step U6 when determining the external interrupt from the IrDA modulation / demodulation circuit 17, determines whether or not a predetermined time has elapsed (step U9).
The determination as to whether or not this predetermined time has elapsed is performed by the CPU 16 counting the number of times the RTC circuit 14 has activated a fixed-cycle interrupt and determining whether the number of times of activation is equal to or greater than a preset number. . The number of times the fixed-cycle interrupt is started and the cycle (start-up time interval) are arbitrarily set by the user in advance. If the predetermined time has elapsed in step U9, the output of the power supply control circuit 13 is turned off (off state) in step U2, and the process ends.

If it is determined in step U9 that the time has not elapsed, the process returns to step U4, the CPU 16 and its peripheral circuits shift to the standby state again, the processes of steps U4 to U9 except step U8 are repeated, and the external device 2 Interruption acceptance is maintained as it is. And CPU1
When it is determined that the predetermined time has elapsed due to the number of fixed-cycle interrupts, the period, etc., 6 determines Yes in step U9, turns off the output of the power supply control circuit 13 in step U2, and ends this state. Also in this case, according to the inventors, the process is completed in about 3 hours on average, and about 10 hours at the maximum, and the power consumption of the main power supply 12 can be suppressed.

According to such a second embodiment, the CP
When the PW key is turned off while U16 is operating, CP
When the U16 enters the standby state and the interrupt is accepted in the standby state, the remote wakeup process is executed, and if a predetermined time elapses without accepting the interrupt, the CPU16
Holds the power supply control circuit 13 in the OFF state, and the RTC circuit 1
4 and the PW key detection circuit 19 except for the power supply, the power consumption of the main power supply 12 can be reduced. As a result, substantially the same effect as that of the first embodiment can be obtained.

Since the number of times the fixed-cycle interrupt is started and the cycle (start-up time interval) have been arbitrarily set by the user in advance, the time during which the power supply is maintained can be arbitrarily set, improving versatility.

(Third Embodiment) FIG. 6 shows a third embodiment of the present invention.
The difference from the first embodiment is that the CPU 16 sends an inquiry signal to the external device 2 and waits for a response (communication request) from the external device 2 within a predetermined time. It is in the place where it was made. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Since the part different from the first embodiment is the operation of the BHT 11, only this part will be described below.

FIG. 6 shows a timing chart of the schematic operation when the main power supply is turned off from the operating state of the BHT 11. When the PW key is turned off, the CPU 16 sends the RTC circuit 14 through the gate array 18.
And the RTC circuit 14 starts to generate a fixed cycle interrupt. After that, the power supply control circuit 13 controls the output power supply to be turned off (off state) based on the detection of the PW key detection circuit 19 being turned off, and the RTC circuit 14 and the PW key detection circuit 19 are turned on.
Power supply other than the above will be cut off. In this case, CPU1
6 shifts to a non-operating state in response to the power cut. And R
When the CPU 16 is activated by the fixed-cycle interrupt of the TC circuit 14 and enters the operating state, the CPU 16 sends an inquiry signal to the external device 2 (FIG. 6,). CPU 16
The external device 2 waits for a communication request responding to the inquiry signal, but does not accept the inquiry signal because the external device 2 receives this inquiry signal but performs another job.

Therefore, the CPU 16 waits for the waiting time T2.
Since the communication request responding to the inquiry signal is not accepted, the communication is not established and the waiting time T2 elapses.
The power supply is cut off and the system shifts to the non-operating state. When the fixed-cycle interrupt occurs again, the inquiry signal is sent again (FIG. 6,). The CPU 16 waits again for a response to the inquiry signal during the waiting time T2, but since the external device 2 is not in the waiting state for the inquiry signal although other jobs are finished, communication is not established in this case either. The power supply control circuit 13 is turned off, and the power supply is cut off.

When the job of the external device 2 is completed, the external device 2
Becomes ready to wait for an inquiry signal, it enters an inquiry signal waiting state. Then, in the BHT 11, when the fixed-cycle interrupt occurs again, the CPU 16 sends the inquiry signal again (FIG. 6,). In this case, since the external device 2 is in the standby state for the inquiry signal, when the inquiry signal is received, the inquiry signal is accepted and the RWU request (communication request) is issued to the CPU 1.
6 (FIG. 6,). The CPU 16 accepts this RWU request as a response to the inquiry signal and establishes communication. Then, the remote wakeup process is performed, and the above-described data communication and the like are performed between the BHT 1 and the external device 2. Others are substantially the same as those in the first embodiment, and thus the description thereof will be omitted.

According to such a third embodiment, the CP
When U16 is activated by the RTC circuit 14 in a non-operating state, the CPU 16 waits for a response from the external device 2 by sending an inquiry signal to the external device 2 and accepts a communication request in response to the inquiry signal. In this case, remote wakeup processing is performed. This makes it possible to obtain substantially the same operational effects as those of the first embodiment.

(Fourth Embodiment) FIG. 7 shows a fourth embodiment of the present invention.
The third embodiment is different from the third embodiment in that the inquiry signal sent by the CPU 16 is added with the time information for sending the next inquiry signal. In the fourth embodiment, as shown in the timing chart of the schematic operation in FIG. 7, when the CPU 16 is in the operating state in response to the power supply, the time signal T3 together with the inquiry signal.
To send. This time information T3 is defined in advance between the BHT 1 and the external device 2, and indicates the time information for sending the next inquiry signal from the BHT 11.

When the external device 2 receives the inquiry signal including the time information, when the other job is performed, the external device 2 does not receive the inquiry signal but receives the time information T3, and the external device 2 receives the next inquiry signal. It is possible to obtain the time information when is sent. Therefore, the external device 2 is in the standby state for the inquiry signal at the timing when the inquiry signal is transmitted next time, so that the external device 2 can reliably receive the inquiry signal and establish the communication next time.

(Other Embodiments) The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following modifications or expansions are possible. BHT1
Although the embodiment has been described with reference to No. 1 (primary battery drive type portable terminal device), it may be applied to a primary battery drive type portable terminal device or may be applied to a secondary battery drive type portable terminal device.

Although the CPU 16 is configured to instruct the power supply control circuit 13 to be in the off state, it may be configured to instruct the other circuits provided in the BHT 11 to be in the off state.

The CPU 16 may be provided with a register in which a time range in which activation based on the RTC circuit 14 is permitted or a time range in which activation is prohibited is set. If this register is set to prohibit activation, for example, the RTC is set in the time range to which this setting is applied.
Even if the circuit 14 issues a signal, the CPU 16 will ignore this signal and the state of the CPU 16 will be maintained.

A register provided in the CPU 16 has a time for waiting for a communication request from the external device 2, the number of times for waiting for the communication request, a time range for permitting activation based on the RTC circuit 14,
At least one of the time ranges for permitting activation based on the RTC circuit 14 may be set as necessary.

In the second embodiment, an embodiment has been shown in which the communication request is sent from the external device 2 to the CPU 16, but the present invention is not limited to this, and the inquiry signal is sent from the CPU 16 to the external device 2. The CPU 16 may be configured to wait for a response to this inquiry signal from the external device 2. In this case, when a response to the inquiry signal is received, the predetermined process is performed, and after the predetermined process is performed, the power supply is cut off, and when the process request is not received within the predetermined time, the power supply is turned off. Configure to cut off supply. Further, the inquiry signal may be added with time information for transmitting the next inquiry signal.

In the above description, the PW key detection circuit 19 is connected to the CPU 16 and the main power supply 12 is turned off when the PW key is turned off.
The key detection circuit 19 may be provided as needed. For example, when the PW key and the PW key detection circuit 19 are not provided, the power supply control circuit 13 is turned off by a timer provided inside after a predetermined time has passed from the operating state, so that the supply of the main power supply 12 is cut off. It may be. Also CP
The power supply control circuit 13 may be turned off in the application program executed by U16 or the like.

In the above-described embodiment, the embodiment in which the CPU 16 performs the communication process with the external device 2 as the predetermined process has been described, but the BHT 11 alone may perform the process by the internal application program, for example.

[Brief description of drawings]

FIG. 1 is an electrical configuration diagram of a BHT showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of BHT.

FIG. 3 is a timing chart showing the operation of a BHT and an external device.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 5 is a view corresponding to FIG.

FIG. 6 is a view corresponding to FIG. 3 showing a third embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 3 showing a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a conventional configuration.

[Explanation of symbols]

2 is an external device, 11 is a BHT (mobile terminal device), 12 is a main power supply (battery), 13 is a power supply control circuit (power supply control means), 14 is an RTC circuit (starting means), 16 is a CPU
(Microprocessor, power-off means).

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5B011 DA06 EA04 EA05 EA08 KK03                       KK04 MA02                 5B019 CA08 GA10                 5K067 AA43 BB04 DD27 KK05 KK13                       KK15

Claims (13)

[Claims] 1. A power control means for validating a power supply from a battery in an on state and a null power supply from the battery in an off state, and communication with an external device when the power control means is in an on state. A microprocessor that is in an operative state that can be established, and that is provided so as to be operable even in the off state of the power supply control means
Start-up means for turning on the power supply control means in a predetermined cycle when the power supply control means is off; and power off means for holding the power supply control means in the off state when a predetermined time has elapsed after the power off command was issued. The power control unit is turned off when a power-off command is issued, and the microprocessor receives a processing request from the external device when the microprocessor is activated in response to being turned on. In this case, the mobile terminal device is configured to execute a predetermined process and turn off the power supply control means when a process request is not received within a predetermined waiting time. 2. The mobile terminal device according to claim 1, wherein the microprocessor is configured to hold the power supply control means off when a predetermined process is executed. 3. The microprocessor is configured to execute the operation of the power supply off means by keeping the power supply control means off when the number of times of activation reaches a set number of times. The mobile terminal device according to claim 1 or 2. 4. The mobile terminal device according to claim 1, wherein the activation means is provided with an activation time interval and an activation frequency that can be arbitrarily set. 5. The microprocessor sends an inquiry signal to the external device when activated when the power supply control means is turned on, and receives a processing request from the external device in response to the inquiry signal. A predetermined process is executed, and the power supply control means is turned off when a process request is not received within a waiting time for establishing communication with the external device. 5. The mobile terminal device according to any one of 1 to 4. 6. The mobile terminal device according to claim 5, wherein the microprocessor, when transmitting an inquiry signal to the external device, adds time information indicating a time at which the next inquiry signal is transmitted. 7. The microprocessor shifts to a standby state capable of accepting an interrupt corresponding to a processing request from the external device when activated in response to turning on of the power supply control means, and in this standby state 7. The mobile terminal device according to claim 1, wherein the mobile terminal device is configured to shift to an operating state and execute a predetermined process when an interrupt is accepted. 8. Power supply control means for enabling power supply from a battery in an on state and disabling power supply from the battery in an off state, and communication with an external device when the power supply control means is in an on state. The microprocessor is provided with an operation state that can be established, and a power-off means that holds the power-supply control means in an off state when a power-off is commanded and a predetermined time has elapsed, and the microprocessor is instructed to power-off. In this case, the portable terminal device is configured to execute an interruptable standby state in response to a processing request from the external device, and to execute a predetermined process when an interrupt is accepted in the standby state. . 9. The mobile terminal device according to claim 8, wherein the microprocessor is configured to turn off the power supply control means when the predetermined processing is executed. 10. A start-up means for starting the microprocessor in a predetermined cycle is provided, wherein the microprocessor turns off the power supply control means when the number of start-ups reaches a set number of times to operate the power-off means. The mobile terminal device according to claim 9, wherein the mobile terminal device is configured to execute. 11. A starting means for starting the microprocessor at a predetermined cycle is provided, wherein the microprocessor sends an inquiry signal to an external device when the microprocessor is started from a standby state, and the external device responds to the inquiry signal. 11. When the processing request is received, the predetermined processing is executed, and when the processing request is not received within the predetermined waiting time, the standby state is restored.
The mobile terminal device according to any one of 1. 12. The portable terminal device according to claim 11, wherein the microprocessor, when transmitting an inquiry signal to the external device, adds time information indicating a time for transmitting the next inquiry signal. 13. The start-up means is provided so that a start-up time interval, the number of start-ups, and a waiting time for establishing communication with the external device can be arbitrarily set. The mobile terminal device according to.