JP2001228940A - Composite terminal system and man-machine interface controlling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an MMI control method and its composite terminal capable of reducing current consumption by allowing slave systems to directly control an MMI part without using a master system to keep the master system standstill in slave mode communication. SOLUTION: This invention comprizes the master system 10 having a master control part 11 to perform master mode communicating operation, plural slave systems having a slave control part 21 to perform slave mode communicating operation, a man-machine interface part 50 having a display part 51 and a key part 52 to be connected with the system 10 or the systems 20, and a switching circuit 70 for switching connection to the man-machine interface part and the master system or the slave systems. The control part 11 is made to be standstill by directly switching the slave systems and the man-machine interface part by the circuit 70 in the slave mode communication operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite terminal in which a specific master system and a plurality of slave systems are connected.
The present invention relates to an MMI control method for performing an LCD display and a key scan control when a mode communication operation is awaited for an I unit, a composite terminal system and a man-machine interface control method for realizing the same.

[0002]

2. Description of the Related Art Conventionally, there has been a composite terminal as shown in FIG. 1 for realizing a man-machine interface (hereinafter referred to as MMI) control method. Figure 1 shows a conventional MM
FIG. 2 is a block diagram illustrating a configuration of a composite terminal having an I control unit. The composite terminal shown in FIG. 1 includes, in each mode communication operation, a master system that performs a specific master mode communication operation including a control unit, a modulation / demodulation unit, and a wireless unit, and a control unit, a modulation / demodulation unit, and a wireless unit. A slave terminal configured to perform a specific slave mode communication operation and an MMI unit controlled by the master system, and is a composite terminal configured by connecting the master system and a plurality of slave systems. FIG. 2 illustrates an example of a hardware configuration that implements an MMI control method in which a system controls an MMI unit.

In FIG. 1, a composite terminal 1 comprises a master system 10, a slave system 20, an MMI unit 50, a battery 2 and a secondary battery 3, and the master system 10
Is composed of a control unit 11, a modulation / demodulation unit 12, and a radio unit 13. The control unit 11 is composed of a CPU 31, a nonvolatile memory 32, and a backed-up memory 33. The slave system 20 includes a control unit 21, a modulation / demodulation unit 22, The control unit 21 includes a CPU 41 and the nonvolatile memory 4.
2 and the backed-up memory 43
The unit 50 includes an LCD 51 and a key unit 52. MMI
The unit 50 receives a signal from the CPU 31 during each mode communication operation.
On / off control of LCD display is performed for CD51,
The key scanning is controlled for the key unit 52.

[0004] Next, with reference to FIG. 3 and FIG. 4, a control operation for the MMI section in the above-described conventional complex terminal will be described in detail. First, with reference to FIG. 3, an operation of the master system of the conventional composite terminal will be described. FIG. 3 is a flowchart of the operation in the master system of the conventional composite terminal shown in FIG. In FIG. 3, the secondary battery 3 is
When power is supplied to the multifunction terminal 1, the power is supplied to the composite terminal 1 and the reset is released, and the master system 10 starts to be turned off (S indicates a step; the same applies hereinafter) 110.
When the specific key of the key section 52 is pressed, the CPU 31 executes the initial S112 by the interrupt input of the power-on interrupt S111, and starts the control of the LCD display ON S131 and the key scan S132. Initial S11
In step 2, the CPU 31 and the CPU 41 confirm the communication mode activated by the inter-system communication via the inter-system communication interface 60, and wait for a key input after the confirmation.
Transitions to.

[0005] In the power-on state, the CPU 31 continues to periodically control the LCD display ON S131 and the key scan S132. In the key scan S132, a key input interrupt S114 set to obtain the key input information in the key input information S115 is issued. In response to the interrupt input of the key input interrupt S114, the process transits from the key input waiting S113 to the key input information S115, obtains the key input information in the key input information S115, and transits to the power ON / OFF determination S116. Power ON / OFF judgment S
At 116, an event is detected based on the key input information obtained from the key input information S115, and if a power-on request is detected, the process transits to mode determination S117. In the mode determination S117, an event is detected based on the communication mode to be activated confirmed in the initial step S112 or the key input information obtained from the key input information S115. If the communication mode to be activated is the master mode communication, the master mode communication processing S1 is performed.
18 and wait for key input in slave mode communication S1
Transition to 13 and wait until a new event is issued.

Next, the operation of the conventional compound terminal slave system will be described with reference to FIG. FIG. 4 is a flowchart of the operation of the conventional composite terminal slave system shown in FIG. In FIG. 4, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released, the slave system 20 starts to be activated, and the power is turned off S120. The CPU 41 executes the initial S122 in response to the interrupt input of the power-on interrupt S121 issued from the master system 10. In the initial step S122, the CPU 31 and the CPU 41 confirm the communication mode to be started by the inter-system communication via the inter-system communication interface 60, and after the confirmation, transit to a key input waiting S123.

[0007] The master system 10 sets information input by a key from a specific key of the key section 52 so that the slave system 20 obtains the key input information in S125, and issues a key input interrupt S124. The slave system 20 transits from the key input waiting S123 to the key input information S125 in response to the interrupt input of the key input interrupt S124. In the key input information S125, the key system obtains the key input information and transits to the power ON / OFF determination S126. Power ON / OFF judgment S
At 126, an event is detected based on the key input information obtained from the key input information S125, and if a power-on request is detected, the process transits to mode determination S127. In the mode determination S127, event detection is performed based on the communication mode to be activated confirmed in the initial step S122 or the key input information obtained from the key input information S125. If the communication mode to be activated is the slave mode communication, the slave mode communication process S128 is executed. Wait for key input if master mode communication
The process transitions to 123 and waits until a new event is issued.

[0008]

However, in the above-described conventional MMI control method, when a plurality of mode communication operations are performed by the composite terminal 1, the MMI unit 50 transmits the LCD display from the CPU 31 of the master system 10 to the LCD 51. Control and key scan control for the key unit 52 are performed.

In the slave mode communication realized by the operation of the slave system 20, the slave system 20 executes a slave mode communication process S128,
The master system 10 operates periodically to control the MMI unit 50 for the slave system 20.

That is, in the conventional slave mode communication, both the master system 10 and the slave system 20 must be operated. For this reason, there is a problem that the current consumption increases due to the operation of the two systems, and the operation time of the composite terminal using the secondary battery during standby becomes short.

An object of the present invention is to solve the above-mentioned conventional problem. When the slave system directly controls the MMI unit to put the master system into a stationary state without passing through the master system, the slave system waits for a slave mode communication operation. The present invention provides an MMI control method capable of reducing the current consumption of the MMI and a complex terminal system for realizing the method.

[0012]

According to the present invention, there is provided a multi-terminal system comprising a master system operating in master mode communication, a plurality of slave systems operating in slave mode communication, a display unit and a key unit, and the master system or the key system. For the man-machine interface unit connected to the slave system and the man-machine interface unit,
A switching circuit for switching connection with either the master system or the slave system is provided, and the switching circuit connects the slave system and the man-machine interface unit in a slave mode communication operation. With this configuration, the CPU of the master system is in a stationary state because LCD control and key scan are not required, and it is possible to reduce current consumption when waiting for slave mode communication operation.

A composite terminal system according to the present invention includes a master system operating in master mode communication, a plurality of slave systems operating in slave mode communication, a man-machine interface having a display and a key, and connected to the master system. The slave system is connected to the man-machine interface unit via the master system, and turns off the display unit after a lapse of a predetermined time from the last operation by the control of the master system when waiting for the slave mode communication operation. , The display unit is turned on by detecting a key press of any key of the key unit by performing a key scan, or by receiving an incoming call of the slave mode communication operation. According to this configuration, the CPU of the master system does not need to control the LCD, and it is possible to reduce the current consumption when waiting for the slave mode communication operation.

A composite terminal system according to the present invention includes a master system operating in master mode communication, a plurality of slave systems operating in slave mode communication, a man-machine interface having a display and a key, and connected to the master system. The slave system is connected to the man-machine interface unit via the master system, and turns off the display unit after a lapse of a predetermined time from the last operation by the control of the master system when waiting for the slave mode communication operation. The display unit is turned on by an interrupt input by pressing a specific key of the key unit or by an incoming call of the slave mode communication operation. With this configuration, the CPU of the master system is in a stationary state because LCD control and key scan are not required, and it is possible to reduce current consumption when waiting for slave mode communication operation.

In the composite terminal system according to the present invention, the slave system and the man-machine interface are connected by the switching circuit in the slave mode communication operation,
When waiting for the slave mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation by the control of the slave system, and key scanning is performed by key scanning to detect key press of any key of the key unit, or slave mode communication. The display unit is turned on when an operation is received. With this configuration, the CPU of the master system becomes stationary because LCD control and key scan are not required, and the CPU of the slave system does not need LCD control, so that current consumption during standby for slave mode communication operation can be reduced. .

In the composite terminal system according to the present invention, the slave system and the man-machine interface unit are connected by the switching circuit in the slave mode communication operation, and the last operation is performed by the control of the slave system when waiting for the slave mode communication operation. The display unit is turned off after a lapse of a certain period of time, and the display unit is turned on by an interrupt input by pressing a specific key of the key unit or by an incoming call of the slave mode communication operation. With this configuration, the master system CP
U is in a stationary state because LCD control and key scan are unnecessary, and the CPU of the slave system can reduce current consumption when waiting for slave mode communication operation because LCD control and key scan are unnecessary.

In the MMI control method according to the present invention, the master system performs a master mode communication operation, the slave system performs a slave mode communication operation, and switches the connection to the man-machine interface to the slave system in the slave mode communication operation. The system is configured to control the man-machine interface unit from the system. With this configuration, the CPU of the master system is in a stationary state because LCD control and key scan are not required, and it is possible to reduce current consumption when waiting for slave mode communication operation.

In the MMI control method according to the present invention, a master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a man-machine interface unit having a display unit and a key unit is controlled by the master system. When waiting for a mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation under the control of the master system, and a key scan is performed to detect a key press of any key of the key unit or to perform a slave mode communication operation. Is turned on by the incoming call. According to this configuration, the CPU of the master system does not need to control the LCD, and it is possible to reduce the current consumption when waiting for the slave mode communication operation.

In the MMI control method according to the present invention, a master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a man-machine interface having a display unit and a key unit is controlled by the master system. When waiting for a mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation by the control of the master system, and an interrupt input by pressing a specific key of the key unit or an incoming call of a slave mode communication operation is performed. To turn on the display unit. With this configuration, the CPU of the master system is in a stationary state because LCD control and key scan are not required, and it is possible to reduce current consumption when waiting for slave mode communication operation.

In the MMI control method according to the present invention, a master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a connection to a man-machine interface having a display unit and a key unit is established in the slave mode communication operation. Switching to the slave system, at the time of waiting for the slave mode communication operation, turning off the display unit after a lapse of a fixed time from the last operation by the control of the slave system, and performing key scan to perform any key of the key unit. The display unit is turned on by detecting a key press or receiving a call in a slave mode communication operation. With this configuration, the CPU of the master system controls the LCD,
Since the key scan is not required, the apparatus is in a stationary state, and the CPU of the slave system does not need to control the LCD, so that it is possible to reduce the current consumption when waiting for the slave mode communication operation.

In the MMI control method according to the present invention, a master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a connection to a man-machine interface having a display unit and a key unit is established in the slave mode communication operation. Switching to the slave system, at the time of waiting for the slave mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation under the control of the slave system, and an interrupt input by pressing a specific key of the key unit, Alternatively, the display unit is turned on by an incoming call of the slave mode communication operation. With this configuration, the CPU of the master system becomes stationary because LCD control and key scan are unnecessary, and the CPU of the slave system does not need LCD control and key scan, so that current consumption during standby in slave mode communication operation can be reduced. You can do it.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 to 5 of the present invention will be described below in detail with reference to the accompanying drawings FIGS. 1, 2 and 4 to 10. FIG. (Embodiment 1) First, with reference to FIG. 2, FIG. 5, and FIG. 6, a composite terminal including an MMI control unit according to Embodiment 1 of the present invention will be described in detail. FIG. 2 is a block diagram illustrating a configuration of a composite terminal including the MMI control unit according to the first embodiment of the present invention. FIG. 5 is a block diagram of a composite terminal including the MMI control unit according to the first embodiment of the present invention illustrated in FIG. FIG. 6 is a flowchart showing the operation of the master system, and FIG. 6 is a flowchart showing the operation of the slave system of the multifunction terminal including the MMI control means according to Embodiment 1 of the present invention shown in FIG.

In FIG. 2, 1 is a composite terminal, 2 is a battery, 3 is a secondary battery, 10 is a master system as, for example, a PDC, 11 is a master control unit, 12 is a modem unit, 1
3 is a radio unit, 20 is a slave system as a PHS, for example, 21 is a slave control unit, 22 is a modem unit, 23
Is a wireless unit, 31 is a CPU, 32 is a non-volatile memory, 33 is a volatile memory, 41 is a CPU, 42 is a non-volatile memory, 43
Is a volatile memory, 50 is an MMI unit, 51 is an LCD, 52 is a key unit, and 70 is a switching circuit.

Next, the configuration of the composite terminal 1 will be described in more detail with reference to FIG. The composite terminal 1 includes a master system 10, a slave system 20, an MMI unit 50, a battery 2, and a secondary battery 3. The master system 10 of the composite terminal 1 includes a control unit 11, a modem unit 12, and a wireless unit 13. The control unit 11 includes a CPU 31, a nonvolatile memory 32, and a memory 33 that is a volatile memory backed up by a battery 2. The slave system 20 includes a control unit 21, a modem unit 22, and a wireless unit 23. C
A PU 41, a non-volatile memory 42, and a memory 43 which is a volatile memory backed up by the battery 2;
The I unit 50 includes an LCD 51 and a key unit 52,
31 and the CPU 41 serve as the inter-system communication interface 60.
The CPU 31 and the switching circuit 70 are connected by a master system control unit switching circuit interface 62, the CPU 41 and the switching circuit 70 are connected by a slave system control unit switching circuit interface 63, and the switching circuit 70 and the MMI unit 50 Are connected by the switching circuit MMI interface 64, and the CPU 4 of the slave system 20
1 can directly control the MMI unit 50. The MMI unit 50, the switching circuit 70, the master system control unit switching circuit interface 62, and the slave system control unit switching circuit interface 63
And switching circuit MMI interface 64 and CPU
The MMI control means is constituted by 31 or the CPU 41.

Next, with reference to FIG. 5, the operation of the master system of the compound terminal including the MMI control means according to the first embodiment of the present invention will be described. This MMI control method is used in a specific slave mode communication operation realized by the operation of the slave system 20.
The switching circuit 70 for connecting the MI unit 50 allows the slave system 20 to directly control the MMI unit 50, so that the CPU 31 of the master system 10 becomes stationary because LCD control and key scan control are not required. It is characterized in that a slave mode communication operation can be realized.

Now, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released.
Master system 10 starts booting and powers off S210
become. The power is turned on by the interrupt input of the power-on interrupt S211 due to the turning on of the power switch issued from the slave system 20.
Step 212 is executed. Initial S212 is executed by the CPU 31
The CPU 41 and the CPU 41 confirm the communication mode activated by the inter-system communication via the inter-system communication interface 60, and after the confirmation, transit to the key input waiting S213.

The slave system 20 sets information input by a key from a specific key of the key section 52 so that the master system 10 can obtain the key input information S215, and issues a key input interrupt S214. The master system 10 waits for a key input by the key input interrupt S214.
Then, the process transits from 213 to key input information S215, and the key input information S215 transits to power on / off determination S216 after obtaining the key input information. Power ON / OFF determination S216
Performs an event detection based on the key input information obtained from the key input information S215, and if a power-on request is detected, transits to mode determination S217. If power off is requested, the process returns to power off S210. Mode determination S2
In step 17, an event is detected based on the communication mode to be activated which is confirmed in the initial step S 212 or the key input information obtained from the key input information S 215. If the communication mode to be activated is the master mode communication, the master mode communication processing S 218 is executed. If it is communication, the process proceeds to key input wait S213, and waits until a new event is issued.

Next, with reference to FIG. 6, the operation of the slave system of the compound terminal provided with the MMI control means according to the first embodiment of the present invention will be described. This MMI control method
In a specific slave mode communication operation realized by the operation of the slave system 20, the switching system 70 connecting the slave system 20 and the MMI unit 50 allows the slave system 20 to directly control the MMI unit 50, so that the master system 10 Since the CPU 31 does not need the LCD control and the key scan control, the CPU 31 is in a stationary state, and the slave mode communication operation can be realized in this state. However, the operation of the slave system 20 differs from that shown in FIG. 5 as described below.

In FIG. 6, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released, the slave system 20 starts to be activated and the power is turned off S220. When a power on / off specific key of the key unit 52 is pressed, the power is turned on by an interrupt input of a power on interrupt S221, and the CPU 41 executes an initial S222 to control the LCD display on S241 and the key scan S242. to start. Initial S22
In step 2, the CPU 31 and the CPU 41 confirm the communication mode activated by the inter-system communication via the inter-system communication interface 60, and wait for a key input after the confirmation.
Transitions to. In the key scan S242, a key input interrupt S224 set to obtain the key input information by the key input information S225 is issued. In the power-on state, in a specific slave mode communication operation realized by the operation of each slave system, the CPU 41 continuously executes the control of the LCD display ON S241 and the key scan S242.

When the key input interrupt S224 interrupts the input, the key input wait state S223 transits to the key input information S225. In the key input information S225, the key input information is obtained and the power on / off determination S226 is performed. If power off is requested, the process returns to power off S220. In the power on / off determination S226, an event is detected based on the key input information obtained from the key input information S225, and if a power on request is detected, the process transits to the mode determination S227. If power off is requested, the process returns to power off S220. In the mode determination S227, the communication mode to be activated or the key input information S22 confirmed in the initial S222.
Event detection is performed based on the key input information obtained from step 5, and if the communication mode to be activated is slave mode communication, slave mode communication processing S228 is executed; if master mode communication, the process proceeds to key input wait S223 to issue a new event. Wait until done.

According to the composite terminal that implements the MMI control method in the first embodiment, the switching circuit 70 that connects the slave system 20 and the MMI unit 50 in a specific slave mode communication operation that is realized by the operation of the slave system 20. And the slave system 20
By directly controlling the I unit 50, the CPU 31 of the master system 10 does not need the LCD control and the key scan control, so that the CPU 31 is in a stationary state, and the slave mode communication operation can be realized in that state. As a result, a composite terminal capable of reducing current consumption when the composite terminal waits for each mode communication operation is obtained.

(Embodiment 2) Next, with reference to FIG. 1, FIG. 7 and FIG. 4, a composite terminal having an MMI control unit according to Embodiment 2 of the present invention will be described in detail. FIG.
FIG. 7 is a block diagram showing a configuration of a composite terminal provided with MMI control means according to Embodiment 2 of the present invention. FIG. 7 is a master system of a composite terminal provided with MMI control means according to Embodiment 2 of the present invention shown in FIG. FIG. 4 is a flowchart showing the operation of the second embodiment shown in FIG.
6 is a flowchart showing the operation of the slave system of the compound terminal including the MI control means.

Next, referring to FIG. 1, the configuration of composite terminal 1 according to Embodiment 2 of the present invention will be described in detail. The composite terminal 1 includes a master system 10 and a slave system 20.
, MMI unit 50, battery 2 and secondary battery 3,
The master system 10 of the composite terminal 1 includes a control unit 11, a modem unit 12, and a wireless unit 13, and the control unit 11
1, a nonvolatile memory 32, and a memory 33 that is a volatile memory backed up by the battery 2. The slave system 20 includes a control unit 21, a modulation / demodulation unit 22, and a wireless unit 23. The control unit 21 includes a CPU 41 and a nonvolatile memory 42.
The MMI unit 50 includes an LCD 51 and a key unit 52. Further, the CPU 31 and the CPU 41 are connected by the inter-system communication interface 60, and C
The PU 31 and the MMI unit 50 are configured to be connected by the control unit MMI unit interface 61. Also, M
In each mode communication operation, the MI unit 50 controls on / off of an LCD display from the CPU 31 to the LCD 51 and controls key scanning for the key unit 52. Note that the interface 6 between the MMI unit 50 and the control unit MMI unit 6
1 constitutes MMI control means.

Next, with reference to FIG. 7, the operation of the master system of the compound terminal including the MMI control means according to the second embodiment of the present invention will be described. According to the MMI control method shown in FIG. 7, in a specific slave mode communication operation realized by the operation of each slave system, the CPU 31 of the master system 10 displays the LCD display after a lapse of a predetermined time from the last operation in standby for the slave mode communication operation. By turning off S335 and detecting the pressing of any key by key scan S332 or turning on the LCD display by receiving a call in the slave mode communication operation, S331 is executed.
Since the PU 31 does not need LCD control, it can implement a slave mode communication operation that does not consume power.

In FIG. 7, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released, the master system 10 starts to start and the power is turned off S310. When a power on / off specific key of the key unit 52 is pressed, the power is turned on by an interrupt input of a power on interrupt S311. The CPU 31 executes an initial S312, and controls the LCD display on S331 and the key scan S332. to start. Initial S312
Then, the CPU 31 and the CPU 41 confirm the communication mode activated by the inter-system communication via the inter-system communication interface 60, and the process proceeds to the key input waiting S313 after the confirmation.

In the power-on state, in a specific slave mode communication operation realized by the operation of each slave system, the CPU 31 obtains from the CPU 41 via the inter-system communication interface 60 whether or not the apparatus is in the standby state in standby determination S333. If not, the process proceeds to the LCD display ON S331, and if not, the process proceeds to the display ON / OFF determination S334. In the display ON / OFF determination S334, after entering the standby state after the last operation, if the time set in advance has not elapsed, the process proceeds to the LCD display ON S331, and if the time has elapsed, the LCD display is turned OFF S335. Transitions to. Key scan S after LCD display off S335
332. The CPU 31 turns on the LCD display S33
1 or LCD display off S335 and key scan S3
32 is continuously executed.

In the processing of the key scan S332, a set key input interrupt S314 is issued in order to obtain information input by pressing any key by the processing of the key input information S315. Key input interrupt S314
Is entered, the process transits from the key input waiting S313 to the key input information S315. In the key input information S315, the key input information is obtained and the process transits to the power on / off determination S316. In the power ON / OFF determination S316, an event is detected based on the key input information obtained from the key input information S315, and if a power ON request is detected, the process proceeds to a mode determination S317. If power off is requested, the process returns to power off S310. In the mode determination S317, an event is detected based on the communication mode to be activated which is confirmed in the initial step S312 or the key input information obtained from the key input information S315. If the communication mode to be activated is the master mode communication, the master mode communication processing S318 is executed. If the communication is in the slave mode, the flow shifts to key input wait S313 to wait until a new event is issued.

Next, with reference to FIG. 4, the operation of the slave system of the compound terminal provided with the MMI control means according to the second embodiment of the present invention will be described. FIG. 4 is a flowchart showing the operation of the slave system of the compound terminal including the MMI control means according to Embodiment 2 of the present invention shown in FIG. In FIG. 4, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released.
The slave system 20 starts booting and turns off the power 120
become. The power is turned on by the interrupt input of the power-on interrupt S121 issued from the master system 10,
The CPU 41 executes the initial S122. In the initial step S122, the CPU 31 and the CPU 41 confirm the communication mode to be started by the inter-system communication via the inter-system communication interface 60, and the process proceeds to a key input waiting S123 after the confirmation.

The master system 10 sets information input by a key from a specific key of the key section 52 so that the slave system 20 obtains the key input information in the process of S125, and issues a key input interrupt S124. The slave system 20 transits from the key input waiting S123 to the key input information S125 in response to the interrupt input of the key input interrupt S124. In the key input information S125, the key system obtains the key input information and transits to the power ON / OFF determination S126. In the power on / off determination S126, an event is detected based on the key input information obtained from the key input information S125, and if a power on request is detected, the process transits to the mode determination S127. If power-off is requested, the process returns to power-off S120.
In the mode determination S127, event detection is performed based on the communication mode to be activated confirmed in the initial step S122 or the key input information obtained from the key input information S125. If the communication mode to be activated is the slave mode communication, the slave mode communication process S128 is executed. If the communication is the master mode communication, the process proceeds to a key input wait S123 and waits until a new event is issued. In the slave system operation of the compound terminal according to Embodiment 2 of the present invention, LCD control and key scan control are not performed.

According to the second embodiment, in a specific slave mode communication operation realized by the operation of the slave system, the CPU 31 of the master system 10 sets the LCD 31 after a lapse of a predetermined time from the last operation in standby for the slave mode communication operation. After turning the display off S335,
The key scan S332 detects the key press of any key, or receives
Since the D display ON S331 is automatically executed, the CPU 31 of the master system 10 does not need to control the LCD, so that it is possible to provide an MMI control method capable of realizing the slave mode communication operation.
By realizing the I control method in the composite terminal, it is possible to provide a composite terminal capable of reducing current consumption when waiting for a slave mode communication operation.

(Embodiment 3) Next, referring to FIG. 1, FIG. 8 and FIG. 4, the MMI according to Embodiment 3 of the present invention will be described.
The composite terminal provided with the control means will be described in detail. FIG. 1 shows the configuration of a multifunction terminal according to Embodiment 3 of the present invention, but the description has been omitted since it has already been described in Embodiment 2 above. FIG. 8 is a flowchart showing the operation of the master system of the compound terminal provided with the MMI control means according to the third embodiment of the present invention shown in FIG. 1, and FIG. 4 is the MMI control means according to the third embodiment of the present invention shown in FIG. 5 is a flowchart showing the operation of the slave system of the composite terminal including the above.

Next, with reference to FIG. 8, the operation of the master system of the compound terminal including the MMI control means according to the third embodiment of the present invention will be described. In the description of FIG. 8, in a specific slave mode communication operation realized by the operation of each slave system, the master system 10 sets the LCD display to off S435 after a lapse of a predetermined time from the last operation in waiting for the slave mode communication operation, LCD display ON upon detection of key press of a specific key by interruption input of CPU or reception of slave mode communication operation S431
Is executed, the master system 10
The MMI control method is characterized in that the CPU 31 is in a stationary state because LCD control and key scan are not required, and a slave mode communication operation can be realized.

In FIG. 8, when the secondary battery 3 is mounted on the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released, the master system 10 starts to be activated and the power is turned off S410. When a specific key of the key section 52 is pressed, the power is turned on by the interrupt input of the power-on interrupt S411, and the CPU 31 executes the initial S412,
The control of the LCD display ON S431 and the key scan S432 is activated. In the initial step S412, the CPU 31 and the CPU 41 confirm the communication mode to be activated by the inter-system communication via the inter-system communication interface 60, and the process proceeds to a key input waiting S413 after the confirmation.

In the specific slave mode communication operation realized by the operation of each slave system in the power-on state, the CPU 31 determines in the standby determination S433
It is determined from the information obtained from the CPU 41 via the inter-system communication interface 60 whether or not the apparatus is in the standby state.
If it is in the standby state, the process proceeds to the display on / off determination S434. In the display on / off determination S434, after the standby state, the LCD display is turned on in S431 if the preset time has not elapsed, and the LCD display is turned off in S435 if it has elapsed. After the execution of the LCD display off S435, the process proceeds to the standby determination S433. Further, the CPU 31 executes the LCD display ON S431 or the LCD display OFF S435, and executes the key scan S4.
32 is continuously executed.

In the process of the key scan S432, a set key input interrupt S414 is issued in order to obtain the key input information by the process of the key input information S415.
When the specific key is pressed, the key scan S4
At 32, a key input interrupt S414 is issued without performing key scan. In response to the interrupt input of the key input interrupt S414, the process transits from the key input waiting S413 to the key input information S415. In the key input information S415, the key input information is obtained and the process transits to the power on / off determination S416. In the power ON / OFF determination S416, the key input information S
Event detection is performed based on the key input information obtained from 415, and if a power-on request is detected, mode determination S4
Transition to 17. If power off is requested, the process returns to power off S410. In the mode determination S417, an event is detected based on the communication mode to be activated which is confirmed in the initial S412 or the key input information obtained from the key input information S415. If the communication mode to be activated is the master mode communication, the master mode communication processing S418 is executed. If the communication is in the slave mode, the flow shifts to key input wait S413 to wait until a new event is issued.

Further, the operation of the slave system of the compound terminal provided with the MMI control means according to the third embodiment of the present invention, which is performed with reference to FIG. 4, has already been described in the second embodiment and will not be described. I do.

According to the third embodiment, in the specific slave mode communication operation realized by the operation of each slave system, the master system 10 waits for the slave mode communication operation and waits for a predetermined time from the last operation to display the LCD. Is turned off S435, and then the CPU 31
The LCD display is turned on by detecting the key press of a specific key by the interrupt input of, or by receiving the slave mode communication operation.
By automatically executing the step 431, the CPU 31 of the master system 10 is in a stationary state because the LCD control and the key scan are not required, and it is possible to provide an MMI control method capable of realizing the slave mode communication operation. By implementing this MMI control method in a composite terminal, it is possible to provide a composite terminal capable of reducing current consumption when waiting for a slave mode communication operation.

(Embodiment 4) Next, referring to FIG. 2, FIG. 5, and FIG. 9, the MMI according to Embodiment 4 of the present invention will be described.
The composite terminal provided with the control means will be described in detail. FIG. 2 shows the configuration of the multifunction terminal according to the fourth embodiment of the present invention, but the description has been omitted since it has already been described in the first embodiment. FIG. 5 is a flowchart showing the operation of the master system of the compound terminal provided with the MMI control means in the fourth embodiment of the present invention shown in FIG. 2, and FIG. 9 is the MMI control means in the fourth embodiment of the present invention shown in FIG. 5 is a flowchart showing the operation of the slave system of the composite terminal including the above.

The operation of the master system of the compound terminal having the MMI control means according to the fourth embodiment of the present invention, which is performed with reference to FIG. 5, has already been described in the first embodiment and will not be described. I do.

Next, with reference to FIG. 9, the operation of the slave system of the compound terminal provided with the MMI control means according to the fourth embodiment of the present invention will be described. FIG. 9 shows that the slave system 20 and the MMI unit 5 in a specific slave mode communication operation realized by the operation of each slave system.
0 is provided, so that the slave system 20 can control the MMI unit 50, so that the master system 10 does not need LCD control and key scan.
Turns off the LCD display after a lapse of a predetermined time from the last operation in the standby mode of the slave mode communication operation S545
By detecting the key press of any key by the key scan S542 or executing the LCD display on S541 by receiving the slave mode communication operation, the CPU 31 of the master system 10 performs the LCD control and the key scan. The MMI control method is characterized in that the MMI control method is characterized in that it is in a stationary state because it is unnecessary, and that the CPU 41 of the slave system 20 can realize a slave mode communication operation that makes LCD control unnecessary.

In FIG. 8, when the secondary battery 3 is attached to the composite terminal 1, the power is supplied to the composite terminal 1 and the reset is released, the slave system 20 starts to be activated and the power is turned off S520. When a specific key of the key unit 52 is pressed, the power is turned on by an interrupt input of a power-on interrupt S521, and the CPU 41 executes initial S522, turns on the LCD display S541 and key scan S542.
Activate the control. In the initial S522, the CPU 3
1 and the CPU 41 confirm, via the inter-system communication interface 60, a communication mode to be started by inter-system communication, and after confirmation, transit to key input waiting S523.

In the power-on state, the CPU 41 determines whether or not the apparatus is in the standby state in the standby determination step S543.
The determination is made based on the information obtained from 41, and if not in the standby state, the process proceeds to the LCD display ON S541, and if it is in the standby state, the process proceeds to the display ON / OFF determination S544. In the display on / off determination S544, after the standby state has been reached, if the preset time has not elapsed, the process transits to LCD display on S541, and if it has elapsed, the LCD display transits to off S545. After the LCD display off S545 is performed, the flow shifts to key scan S542. CPU 41 is L
CD display ON S541 or LCD display OFF S545 is performed, and the control of the key scan S542 is continuously executed.

In the process in the key scan S542,
A set key input interrupt S524 is issued in order to obtain information input by any key using the key input information S525. Key input interrupt S524
With the interruption input, the process transits from the key input waiting S523 to the key input information S525. In the key input information S525, the key input information is obtained and the process transits to the power ON / OFF determination S526. In the power on / off determination S526, an event is detected based on the key input information obtained from the key input information S525, and if a power on request is detected, the mode determination S5 is performed.
Transition to 27. If power off is requested, the process returns to power off S520. In the mode determination S527, an event is detected based on the communication mode to be activated which is confirmed in the initial step S522 or the key input information obtained from the key input information S525. If the communication mode to be activated is the slave mode communication, the slave mode communication processing S528 is executed. If the communication is the master mode communication, the process proceeds to a key input wait S523, and waits until a new event is issued.

According to the fourth embodiment of the present invention, in a specific slave mode communication operation realized by the operation of each slave system, the slave system 20 and the MMI unit 5
0 is provided, the slave system 20 can directly control the MMI unit 50, so that the CPU 31 of the master system 10 is in a stationary state because LCD control and key scan are not required. Indicates that after a certain period of time has passed since the last operation in standby for slave mode communication operation, LC
After the D display is turned off S545, the key scan S542 is performed.
Detects the key press of any key, or turns on the LCD display by receiving a call in the slave mode communication operation S54
By doing so, the CPU 31 of the master system 10 becomes stationary because LCD control and key scan are not required, and the CPU 41 of the slave system 20 can implement an MMI control method that can implement a slave mode communication operation that does not require LCD control. Can be provided, this M
By realizing the MI control method in the composite terminal, it is possible to provide a composite terminal capable of reducing current consumption when waiting for a slave mode communication operation.

(Embodiment 5) Next, with reference to FIGS. 2, 5, and 10, an MM according to Embodiment 5 of the present invention will be described.
The composite terminal provided with the I control means will be described in detail.
FIG. 2 shows the configuration of the composite terminal according to Embodiment 5 of the present invention, but the description has been omitted since it has already been described in Embodiments 1 and 4. FIG. 5 is a flowchart showing the operation of the master system of the compound terminal provided with the MMI control means according to the fifth embodiment of the present invention shown in FIG. 2, and FIG. 10 is an MMI control means according to the fifth embodiment of the present invention shown in FIG. 5 is a flowchart showing the operation of the slave system of the composite terminal including the above.

The operation of the master system of the compound terminal having the MMI control means according to the fifth embodiment of the present invention, which is performed with reference to FIG. 5, has already been described in the first and fourth embodiments and will be described. Is omitted.

Next, with reference to FIG. 10, the operation of the slave system of the compound terminal having the MMI control means according to the fifth embodiment of the present invention will be described. In FIG. 10, in a specific slave mode communication operation realized by the operation of each slave system, the slave system 20 and the MMI
By providing a switching circuit 70 for connecting the unit 50 and enabling the slave system 20 to control the MMI unit 50, the master system 10 is in a stationary state because LCD control and key scan are not required.
The PU 41 turns off the LCD display after a lapse of a certain period of time from the last operation when waiting for the slave mode communication operation, and then turns off the LCD display S645, detects the key press of a specific key by an interrupt input of the CPU, or receives a call for the slave mode communication operation. By executing the LCD display ON S641, the CPU 31 of the master system 10
Since the D control and the key scan control are not required, the system is in a stationary state.
M, characterized in that a slave mode communication operation that does not require control and key scan control can be realized.
This is an MI control method.

In FIG. 10, the secondary battery 3 is
When the terminal is mounted, power is supplied to the composite terminal 1 and reset is released, the slave system 20 starts to be activated, and the power is turned off S610. When a specific key of the key section 52 is pressed, the power is turned on by an interrupt input of a power-on interrupt S621, and the CPU 41 executes initial S622, turns on the LCD display S641 and the key scan S642.
Activate the control. In the initial S622, the CPU 3
1 and the CPU 41 confirm, via the inter-system communication interface 60, a communication mode to be activated by inter-system communication, and after confirmation, transit to key input waiting S623.

In the power-on state, the CPU 41 determines whether or not the apparatus is in the standby state in the standby determination step S643.
Judgment is made from the information obtained from 41, and if it is not in the standby state, the process transits to the LCD display on S641. If it is in the standby state, the process transits to the display on / off judgment S644. In the display on / off determination S644, after the standby state has been reached, if the preset time has not elapsed, the display transitions to LCD display on S641, and if it has elapsed, the LCD display transitions to off S645. After the execution of the LCD display OFF S645, the flow shifts to standby determination S643. The CPU 41 turns on the LCD display S641 or turns off the LCD display S645.
, And the control of the key scan S642 is continuously executed periodically.

In the process of the key scan S642, a set key input interrupt S624 is issued in order to obtain key input information by processing the key input information S625. If the specific key is pressed, a key input interrupt S624 is issued without performing key scan in key scan S642. Key input interrupt S624
, The process proceeds from the key input waiting S623 to the key input information S625. In the key input information S625, the key input information is obtained and the process transits to the power ON / OFF determination S626. In the power on / off determination S626, an event is detected based on the key input information obtained from the key input information S625, and if a power on request is detected, the mode determination S6 is performed.
Transition to 27. If power off is requested, the process returns to power off S620. In the mode determination S627, an event is detected based on the communication mode to be activated or the key input information obtained from the key input information S625 confirmed in the initial S622. If the communication mode to be activated is the slave mode communication, the slave mode communication process S628 is executed. If the communication is the master mode communication, the process proceeds to a key input wait S623 to wait until a new event is issued.

According to the fifth embodiment of the present invention, in the specific slave mode communication operation realized by the operation of each slave system, the slave system 20 and the MMI unit 5
0 is provided, and the slave system 20 can control the MMI unit 50, so that the CPU 31 of the master system 10 is in a stationary state because LCD control and key scan control are not required. After waiting for the slave mode communication operation, the CPU 41 turns off the LCD display after a lapse of a predetermined time from the last operation, sets the LCD display to OFF S645, detects the key press of a specific key by an interrupt input from the CPU, or detects the key operation of the slave mode communication operation. LCD display on by incoming call S
641, the CPU of the master system 10
Reference numeral 31 denotes a stationary state because LCD control and key scan are not required, and the CPU 41 of the slave system 20
An MMI control method that does not require CD control and key scan control and can realize a slave mode communication operation can be provided. By implementing this MMI control method in a composite terminal, a standby mode for a slave mode communication operation can be provided. A composite terminal capable of reducing current consumption at the time can be provided.

[0062]

The composite terminal system and the man-machine interface control method according to the present invention are configured as described above, and in particular, in a specific slave mode communication operation realized by the operation of the slave system, the communication between the master system and the MMI unit. Connection or slave mode and MMI
By providing a switching circuit for switching the connection between the units, the standby mode of the slave mode communication operation is not required, so that the LCD control and the key scan control by the CPU of the master system are not required, and the standby mode is established. Current consumption can be reduced.

The composite terminal system and the man-machine interface control method according to the present invention are configured as described above. In particular, in the specific slave mode communication operation realized by the operation of the slave system, the last operation when waiting for the slave mode communication operation is performed. Turn off the LCD display after a certain period of time from the operation of
Alternatively, the LCD of the master system is turned on by turning on the LCD display by receiving a call in the slave mode communication operation.
By eliminating the need for CD control, it is possible to reduce current consumption during standby for mode communication operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a composite terminal provided with conventional MMI control means, a block diagram showing a configuration of a composite terminal provided with MMI control means according to Embodiment 2 of the present invention, and implementation of the present invention. FIG. 21 is a block diagram showing a configuration of a composite terminal including an MMI control unit according to Embodiment 3.

FIG. 2 is a block diagram illustrating a configuration of a composite terminal including an MMI control unit according to Embodiment 1 of the present invention, and a block diagram illustrating a configuration of a composite terminal including an MMI control unit according to Embodiment 4 of the present invention; And Embodiment 5 of the present invention
FIG. 2 is a block diagram showing a configuration of a composite terminal including an MMI control unit in the first embodiment;

FIG. 3 is an operation flowchart in the master system of the conventional composite terminal shown in FIG. 1;

4 is a flowchart illustrating an operation of the conventional composite terminal slave system illustrated in FIG. 1 and an operation of the composite terminal slave system including the MMI control unit according to the second embodiment of the present invention illustrated in FIG. 1; And a flowchart showing the operation of the slave system of the compound terminal including the MMI control means in Embodiment 3 of the present invention shown in FIG.

FIG. 5 is a diagram showing an MM according to the first embodiment of the present invention shown in FIG.
FIG. 2 is a flowchart showing the operation of the master system of the compound terminal provided with the I control means, and FIG. 2 is a flowchart showing the operation of the master system of the compound terminal provided with the MMI control means in Embodiment 4 of the present invention shown in FIG. Is a flowchart showing the operation of the master system of the composite terminal including the MMI control means according to Embodiment 5 of the present invention shown in FIG.

FIG. 6 is a diagram showing an MM according to the first embodiment of the present invention shown in FIG.
A flowchart showing the operation of the slave system of the compound terminal provided with the I control means,

FIG. 7 shows an MM according to the second embodiment of the present invention shown in FIG.
A flowchart showing the operation of the master system of the compound terminal provided with the I control means,

FIG. 8 is a diagram showing an MM according to the third embodiment of the present invention shown in FIG.
A flowchart showing the operation of the master system of the compound terminal provided with the I control means,

FIG. 9 shows an MM according to the fourth embodiment of the present invention shown in FIG.
A flowchart showing the operation of the slave system of the compound terminal provided with the I control means,

FIG. 10 is a diagram showing M in Embodiment 5 of the present invention shown in FIG. 2;
9 is a flowchart showing the operation of the slave system of the compound terminal including the MI control means.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Composite terminal 2 Battery 3 Secondary battery 10 Master system 11 Master system control unit 12 Master system modulation / demodulation unit 13 Master system radio unit 20 Slave system 21 Slave system control unit 22 Slave system modulation / demodulation unit 23 Slave system radio Unit 31 Master system CPU 32 Master system non-volatile memory 33 Master system backed-up memory 41 Slave system CPU 42 Slave system non-volatile memory 43 Slave system backed-up memory 50 MMI unit 51 LCD 52 Key unit 60 Between systems Communication interface 61 Interface between control units MMI unit 62 Interface between master system control unit switching circuits 63 Between slave system control unit switching circuits Interface 64 Switching circuit MMI interface 70 Switching circuit 110, 210, 310, 410 Master system power off 111, 211, 311, 411 Master system power on interrupt 112, 212, 312, 412 Master system initial 113, 213 , 313, 413 Wait for key input of master system 114, 214, 314, 414 Key input interrupt of master system 115, 215, 315, 415 Key input information of master system 116, 216, 316, 416 Power on / off of master system Judgment 117, 217, 317, 417 Master system mode judgment 118, 218, 318, 418 Master mode communication processing 120, 220, 520, 610 Slave system Power off 121, 221, 521, 621 Slave system power on interrupt 122, 222, 522, 622 Slave system initial 123, 223, 523, 623 Slave system key input wait 124, 224, 524, 624 Slave system Key input interrupt 125, 225, 525, 625 Slave system key input information 126, 226, 526, 626 Slave system power on / off determination 127, 227, 527, 627 Slave system mode determination 128, 228, 528, 628 Slave mode communication processing of slave system 131, 231, 331, 431 L of master system
CD display on 132, 232, 332, 432 Master system key scan 333, 433 Master system standby state determination 334, 434 Master system display on / off determination 335, 435 Master system LCD display off 241, 541, 641 Slave LCD display on system 242, 542, 642 Key scan of slave system 543, 643 Standby state determination of slave system 544, 644 Display on / off determination of slave system 545, 645 LCD display of slave system off

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ms. Uchida F-3 Term, Matsushita Communication Industrial Co., Ltd., 3-1, Tsunashimahigashi 4-chome, Kohoku-ku, Yokohama, Kanagawa 5B011 DA06 EA04 EA10 EB06 EB09 HH02 KK04 KK08 LL06 LL08 MA03 5B045 GG01 KK02 5B069 AA20 BA04 BB13 JA01 KA01 LA05 5K034 AA15 DD02 EE05 FF13 GG05 TT06

Claims (10)

[Claims] A master system operable in master mode communication, a plurality of slave systems operable in slave mode communication, a man-machine interface unit having a display unit and a key unit and connected to the master system or the slave system; For the man-machine interface
A switching circuit for switching connection with either the master system or the slave system, wherein the switching circuit connects the slave system and the man-machine interface unit in a slave mode communication operation. Terminal system. 2. A slave system comprising: a master system operable in master mode communication; a plurality of slave systems operable in slave mode communication; and a man-machine interface having a display unit and a key unit and connected to the master system. Is connected to the man-machine interface unit via the master system, and turns off the display unit after a lapse of a predetermined time from the last operation by the control of the master system when waiting for the slave mode communication operation, and performs key scan. The composite terminal system according to claim 1, wherein the display unit is turned on by detecting a key press of any key of the key unit or receiving a call for the slave mode communication operation. 3. A slave system comprising: a master system operating in a master mode communication operation; a plurality of slave systems operating in a slave mode communication operation; and a man-machine interface unit having a display unit and a key unit and connected to the master system. Is connected to the man-machine interface unit via the master system, turns off the display unit after a lapse of a predetermined time from the last operation by the control of the master system when waiting for the slave mode communication operation, and specifies the key unit. The multi-terminal system according to claim 1, wherein the display unit is turned on by an interrupt input by pressing a key or by receiving an incoming call of the slave mode communication operation. 4. A slave circuit and a man-machine interface unit are connected by a switching circuit in a slave mode communication operation, and a display unit is provided after a lapse of a predetermined time from the last operation by the control of the slave system when waiting for the slave mode communication operation. 2. The multifunction terminal according to claim 1, wherein the display unit is turned off by detecting a key press of any key of the key unit by performing key scan or receiving an incoming call in a slave mode communication operation. system. 5. A slave system and a man-machine interface unit are connected by the switching circuit in a slave mode communication operation, and when a standby time for the slave mode communication operation is displayed after a lapse of a predetermined time from the last operation by the control of the slave system. 2. The multi-terminal system according to claim 1, wherein the display unit is turned off by turning off the unit and receiving an interrupt by pressing a specific key of the key unit or by receiving a call in a slave mode communication operation. 6. A master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a connection to a man-machine interface is switched to the slave system in the slave mode communication operation. A method for controlling a man-machine interface, characterized in that a control unit is controlled. 7. A master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a man-machine interface unit having a display unit and a key unit is controlled by the master system. The display unit is turned off after a lapse of a predetermined time from the last operation under the control of the master system, and the key scan is performed to detect a key press of any key of the key unit or to display the display by receiving a call in a slave mode communication operation. A method for controlling a man-machine interface, characterized in that a section is turned on. 8. A master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a man-machine interface unit having a display unit and a key unit is controlled by the master system. In the control of the master system, the display unit is turned off after a lapse of a predetermined time from the last operation, and the display unit is turned on by an interrupt input by pressing a specific key of the key unit, or by receiving a call in a slave mode communication operation. A method for controlling a man-machine interface, the method comprising: 9. A master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a connection to a man-machine interface having a display unit and a key unit is switched to the slave system in the slave mode communication operation. At the time of waiting for the slave mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation under the control of the slave system, and key scanning is performed by performing key scan, or key press detection of any key of the key unit, or A man-machine interface control method, wherein the display unit is turned on by an incoming call of a mode communication operation. 10. A master mode communication operation is performed by a master system, a slave mode communication operation is performed by a slave system, and a connection to a man-machine interface unit having a display unit and a key unit is switched to the slave system in the slave mode communication operation. At the time of waiting for the slave mode communication operation, the display unit is turned off after a lapse of a predetermined time from the last operation under the control of the slave system, and an interrupt is input by pressing a specific key of the key unit, or the slave mode communication operation is started. A man-machine interface control method, wherein the display unit is turned on by an incoming call.