JP2000341446A - Data communications equipment and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption, even when in operation, of data communications equipment which is constituted to make data communication through a plurality of channels and to reduce the power consumption, when the equipment is not operated. SOLUTION: When data communications equipment is not operating, first and second facsimile control sections 1a and 1b and channel control sections 2a and 2b are stopped under the control of clock control sections 11a and 11b which control the output of clock signals, and when communication is made only via a first channel, only first control sections 1a and 2a are actuated. When reception is made via a second channel only, second control sections 1b and 2b are actuated, and after the reception is completed, the first control sections 1a and 2a are actuated and the received data are transferred from the second control section 1b to the first control section 1a and outputted by printing by means of a printer section 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication apparatus, such as a facsimile apparatus, for performing communication via a communication line, and more particularly, to a data communication apparatus configured to enable communication via a plurality of communication lines, and The present invention relates to a control method for reducing the power consumption.

[0002]

2. Description of the Related Art In recent years, facsimile apparatuses accommodating a plurality of public lines have been developed. This means that if one line is used in the facsimile machine,
Facsimile transmission / reception can be performed on another line, which is very useful in an environment such as an office having a large communication volume.

On the other hand, recently, in facsimile machines,
With the demand for lower power consumption, there is a movement to establish and manage power consumption standards overseas. Conventionally, in a facsimile apparatus, the system is always in an operating state, so that power consumption is large. However, in recent years, in low power facsimile machines, transmission / reception and operation (operation)
It is considered that the system is halted at a non-operation time other than the time to reduce power consumption. In this apparatus, a start signal is supplied to a main power supply when an operator operates or when facsimile transmission / reception is performed, and power is supplied to each unit to start the apparatus.

FIG. 1 shows the configuration of a conventional example of such a low power consumption facsimile apparatus which can accommodate only one line.

In FIG. 1, reference numeral 1a denotes a facsimile control unit for controlling the entire facsimile apparatus, 2a denotes a line control unit, 3a denotes an operation panel unit (hereinafter abbreviated as an operation panel unit) operated by an operator, and 4a denotes a document. This is a document reading unit including an image sensor for reading a document. A printer unit 6a prints out a received image. Power is supplied to these by the main power supply 5a.

In this facsimile apparatus, usually, at the time of transmission, an image of a document is read by an image sensor of a document reading unit 4a, the image read by a facsimile control unit 1a is compressed, and transmitted to a line via a line control unit 2a. , To the other station. The other station to be transmitted is input from the operation panel unit 3a. At the time of reception, the line control unit 2a detects a call signal (CI signal) from the line, connects the line to the partner device, and captures image information from the partner device. The received image information is expanded by the facsimile control unit 1a and printed out on paper by the printer unit 6a.

The facsimile control unit 1a controls whether the entire system is in an operation state or a halt state. A part of the low power consumption control unit 13 of the facsimile control unit 1a can operate even when the system is in a sleep state. For the low power consumption control unit 13, the line control unit 2a detects the off-hook of the handset and the CI signal detection signal, the document reading unit 4a detects the document detection signal of the document sensor 41, the operation panel unit as the activation factors of the main power supply 5a. Key input signals are respectively input from 3a.
Each activation factor detection circuit is energized and operable even when the system is in a sleep state.

The facsimile apparatus stops power supply from the main power supply 5a to each unit in a standby state except during transmission / reception and operation, enters a low power consumption state, and suspends the system. In this state, the low power consumption control unit 13 monitors the above-mentioned activation factors, and outputs a startup signal to the main power supply 5a to supply power when each factor occurs, thereby activating the system.

In a state where normal operation is possible, the facsimile control unit 1a monitors the above-mentioned activation factors, and when each factor does not occur for a certain period of time, shuts off the power supply to each unit and suspends the system by itself. Then, the control is transferred to the low power consumption control unit 13 which is a part of itself.

The above is referred to as a first facsimile system.

Next, FIG. 2 shows a configuration of a conventional example of a device capable of accommodating a plurality of lines with a low power consumption facsimile machine. In this configuration, a second facsimile control unit 1b and a second line control unit 2b (together referred to as a second facsimile system) are provided for the first facsimile system.
To enable control of two lines.

The second facsimile control unit 1b and the line control unit 2b control only the second line, and the transmission data transmitted from the second line is transmitted in a state encoded by the first facsimile control unit 1a. 2 facsimile control unit 1b
And is converted into a signal by the modem of the second facsimile control unit 1b, and is converted to a second signal via the second line control unit 2b.
Output to the line.

Conversely, data received from the second line is input from the second line control unit 2b to the modem of the second facsimile control unit 1b, and is encoded as received data by the first facsimile control unit. 1a, and is decoded by the first facsimile control unit 1a.
a is printed out.

The CI detection from the second line control unit 2b is used as a main power supply activation factor as a first facsimile control unit 1a.
Is input to the low power consumption control unit 13. The detection circuit for this factor is energized and operable even when the system is in a sleep state.

The facsimile apparatus having this configuration is in a low power consumption state as a standby state except during transmission / reception and operation, and the low power consumption control section 13 of the first facsimile control section 1a monitors the above-mentioned activation factors, and When a factor occurs, a start signal is output to the main power supply 5a to supply power and start the system. The first facsimile control unit 1a monitors the above-mentioned activation factors in a normal operable state, and when each factor does not occur for a certain period of time, shuts off the power supply and suspends the system by itself to reduce the power consumption. The control is transferred to the power control unit 13.

[0016]

In the conventional example of the facsimile apparatus described above, the power consumption in the standby state when the facsimile apparatus is not operating can be reduced.

However, in the configuration of FIG. 2 accommodating two lines, when reception is performed by only the second line, the second facsimile system is activated by the first facsimile control unit 1a, so that communication is performed only by the second line. Nevertheless, the first facsimile system is also in an operating state, and wastefully consumes power.

On the other hand, when receiving only on the first line,
The power is turned on by the first facsimile control unit 1a, and the second facsimile system is in operation even though communication is performed only through the first line, and power is wasted.

An object of the present invention is not limited to a facsimile apparatus, but also to a data communication apparatus which is configured to perform data communication via a plurality of communication lines and reduces power consumption when the apparatus is not operating. It is an object of the present invention to solve the problem and reduce power consumption even during operation.

[0020]

According to the present invention, in order to solve the above-mentioned problems, data communication is performed through a plurality of communication lines, and power consumption is reduced during non-operation. In the device, a first communication control unit for controlling data communication via a first communication line and controlling output of received data, and a second for controlling data communication via a second communication line. A communication control unit, wherein the first and second communication control units perform the communication when the operation of the communication control unit becomes unnecessary according to the control of the communication control unit during the operation of the communication control unit. First and second control means for stopping the control unit itself and activating and operating the communication control unit according to a predetermined activation factor while the communication control unit is stopped are provided, respectively. By the control of the control means, the first and the second Communication control unit is stopped, when performing data communication via only the first communication line is the first
When only the communication control unit is activated to perform data communication and performs reception only through the second communication line, the second communication control unit is activated to perform reception, during or after reception, The first communication control unit is activated and the second communication control unit is activated.
In this configuration, the received data is transferred from the communication control unit to the first communication control unit, and the received data is output.

Further, the activation factors include an activation signal for causing the first communication control unit to activate the second communication control unit, and an activation signal for causing the second communication control unit to activate the first communication control unit. And an activation signal for activating.

Further, when the second communication control unit performs reception only through the second communication line, the second communication control unit stores the received data until transfer of the received data to the first communication control unit is completed. It has a memory for storing.

Further, in the case of performing reception only through the second communication line, the second communication control unit is to be stopped immediately after transferring the received data to the first communication control unit. did.

Further, in the case where reception is performed via only the second communication line and the output of the reception data is not possible, the second communication control unit transmits the reception data to the first communication unit during or after reception. The received data is held in the memory without being transferred to the communication control unit and without stopping after reception.

The first and second control means may control the output of a clock signal supplied to the first and second communication control units to stop or operate the communication control unit, or The power supply to the first and second communication control units is controlled to stop or operate the communication control units.

Further, according to the present invention, there is provided a data communication apparatus for performing data communication via a plurality of communication lines and reducing power consumption when the apparatus is not in operation, and controlling data communication via the first communication line. And a first communication control unit that controls output of received data and a second communication control unit that controls data communication via a second communication line. In operation, the first and second communication control units are stopped, and when data communication is performed via only the first communication line, only the first communication control unit is started to perform data communication. When receiving via only the second communication line, the second communication control unit is activated to perform reception, and during or after reception, the first communication control unit is activated. Before receiving data from the second communication control unit It is transferred to the first communication control unit, to employ a method for causing the output of the received data.

Further, in the case where reception is performed only via the second communication line, the second communication control unit immediately transfers the received data to the first communication control unit immediately after the second communication control unit has completed the transfer. The control unit was stopped.

Further, in the case where reception is performed via only the second communication line and the output of the reception data cannot be performed, the second communication control unit transmits the reception data to the first communication unit during or after reception. And the received data is held in the memory without stopping the second communication control unit even after reception.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. Here, an embodiment of a facsimile apparatus capable of accommodating two lines will be described.

<First Embodiment> The configuration of a facsimile apparatus according to a first embodiment of the present invention will be described with reference to FIG. In this configuration of the facsimile apparatus, a first facsimile control unit 1a, which controls the facsimile apparatus as a whole, controls facsimile communication via the first line, and controls printout of received image data, in particular, A first line control unit 2a for controlling connection to a line, an operation panel (operation panel) unit 3 having various input keys for an operator to perform a facsimile operation such as inputting a destination telephone number, and A document reading unit 4 including an image sensor for reading,
It has a printer section 6 for printing received images and a main power supply 5 for supplying power to the entire system. Further, since the facsimile apparatus of the present embodiment is a facsimile apparatus accommodating two lines, it has the same function as the first line control unit 2a, and controls the connection with the second line. And a second facsimile control unit 1b for controlling the facsimile communication via the second line by controlling the unit 2b.

The first facsimile control unit 1a and the second facsimile control unit 1b are connected by a specific interface so that data can be exchanged.

The first and second facsimile control units 1
The clock control units 11a and 11b are provided for each of the control units 1a and 1b, thereby controlling the output of the clock signal supplied to the control units 1a and 1b and the first and second line control units. The units 1a and 1b and the line controllers 2a and 2b are stopped or operated.

During the operation of the first facsimile control section 1a, the clock control section 11a transmits signals to the control section 1a and the line control section 2a when the operation of the control section 1a becomes unnecessary according to the control of the control section 1a. The output of the clock signal is stopped to stop the facsimile control unit 1a and the line control unit 2a. During the stop of the facsimile control unit 1a, a clock signal is output to the control unit 1a and the line control unit 2a according to each activation factor described later. Then, the facsimile control unit 1a and the line control unit 2a are activated and operated. Similarly, the clock control unit 11b stops or starts the second facsimile control unit 1b and the line control unit 2b to operate.

Next, the line controllers 2a and 2b will be described. The first line control unit 2a has a first public line connection terminal and a terminal to which an external telephone or handset can be connected in parallel with the first public line connection terminal. Further, it has a CI detecting means 21a for detecting a CI signal (a call signal, an incoming signal) from the first public line, and an off-hook detecting means 22 for detecting an off-hook of the telephone or the handset. It is activated by detecting the CI signal on the first line or detecting the off-hook.

The second line controller 2b has a function similar to that of the first line controller 2a, and has a CI detector 21b for detecting a CI signal from the second public line. It has no terminals and no means to detect its off-hook.

Next, the first and second facsimile control units 1
A description will be given of the activation factors that activate the a, 1b and the first and second line controllers 2a, 2b from the stopped state to the operating state.

As the activation factor, a key input factor is output from the operation panel unit 3, and the operation is activated by pressing a key on the operation panel unit 3.

The original reading section 4 outputs a detection signal of an original sensor 41 for detecting the presence or absence of an original as a starting factor, and becomes active when an original is set in the original reading section 4. .

From the second line control unit 2b, the CI detection signal from the CI detection means 21b is input to the second facsimile control unit 1b as an activation factor, and the first facsimile control unit 1b outputs the first signal. Facsimile control unit 1a
Is input to the first facsimile control unit 1a as an activation factor for activating.

The first facsimile control unit 1a sends a start signal as a start factor for starting the second facsimile control unit 1b to the second facsimile control unit 1b.
Is input to

Each activation factor of the CI detection signal, the off-hook detection signal from the first line control unit 2a, the key input from the operation panel unit 3, the document detection signal from the document sensor 41,
The activation factor of the CI detection signal from the second facsimile control unit 1b is ORed and the first facsimile control unit 1a
Is input to

In the above configuration, the clock control units 11a, 11b, C underlined in FIG.
I detecting means 21a, 21b, off-hook detecting means 22,
Key input section of operation panel 3, document sensor 41
And the main power supply 5 is in a system halt state, that is, the first and second facsimile control units 1a and 1b and the line control unit 2a,
It operates even during the stop of 2b.

Next, the operation of the facsimile apparatus having the above configuration will be described.

In the case of facsimile transmission using the first line, the image of the original read from the image sensor of the original reading unit 4 is binarized, and converted into MH, MR, MMR code, or the like by the first facsimile control unit 1a. Is converted. The converted data is sent to the first facsimile controller 1a.
The signal is modulated into an analog signal by a first modem (modulator / demodulator), and output to a first line from a first line control unit 2a connected to a transmission destination.

In the case of facsimile reception using the first line, the CI signal from the other party is transmitted to the first line control unit 2a.
And the line control unit 2a connects the line with the other party. The first modem in the first facsimile control section 1a demodulates an analog signal from the other party into a digital data signal. Since this data has been encoded, it is decoded by the first facsimile control unit 1a, becomes image data, and is printed out from the printer unit 6 as an image.

On the other hand, in the case of facsimile transmission using the second line, the image read from the image sensor of the document reading section 4 is binarized, and the first facsimile control section 1a performs MH or MR, MMR coding. And so on. The coded data is transferred to the second facsimile control unit 1b, modulated into an analog signal by the second modem in the second facsimile control unit 1b, and transmitted from the second line control unit 2b connected to the transmission destination. 2 is output to the public line.

In the case of facsimile reception using the second line, the CI signal from the other party is transmitted to the second line controller 2b.
Of the second line control unit 2b
Connects the line with the other party. The second modem in the second facsimile controller 1b demodulates an analog signal from the other party into data. This data is transferred from the second facsimile controller 1b to the first facsimile controller 1a. Since this data is encoded, it is decoded by the first facsimile control unit 1a to become image data,
The image is printed out from the printer unit 6 as an image.

When the facsimile apparatus of this embodiment enters a low power consumption state during non-operation other than transmission and reception and operation, the first and second facsimile control units 1a and 1b.
Controls the respective clock control means 11a and 11b to stop its own clock, and shifts to a stopped state, that is, a so-called sleep mode.

At this time, the stop of the clock causes the first
And second facsimile control units 1a and 1b and line control unit 2
a and 2b are stopped, and the system of the entire apparatus is in a halt state, but as described above, the clock control units 11a and 11b,
CI detecting means 21a, 21b, off-hook detecting means 2
2. The key input unit of the operation panel 3, the document sensor 41, and the main power supply 5 are operating. Then, each factor of the key input in the first facsimile control section 1a, the document detection signal, the CI detection signal from the first line control section 2a, the off-hook detection signal, and the activation signal from the second facsimile control section 1b. The detecting means is operating. Further, the CI detector 21b of the second line controller 2b is also operating, and each factor detection of the CI detection signal in the second facsimile controller 1b and the activation signal from the first facsimile controller 1a is performed. The means are operable as well.

Key input, document detection, CI from first line
When starting from the low power consumption state due to any of the activation factors of the signal and the off-hook detection, the activation factor detection means of the first facsimile control unit 1a detects the activation factor and controls the clock in response to the detection. Part 11a
Starts clock output to the facsimile control unit 1a and the line control unit 2a, and the facsimile control unit 1a starts up and performs a start-up operation.

In this case, no clock is supplied to the second facsimile control unit 1b and the second line control unit 2b unless the operator specifies the second line in the transmission operation.
Therefore, the second facsimile system remains in the sleep mode.

If the operator designates the second line in the transmission operation or wants to perform the transmission operation while communicating on the first line, the first facsimile control is performed according to a key input or the like on the operation panel unit 3 for that purpose. A start signal is sent from the unit 1a to the second facsimile control unit 1b. Then, the activation factor detecting means in the control unit 1b detects the activation signal, and in response to this, the clock control unit 11b starts outputting the clock to the facsimile control unit 1b and the line control unit 2b, and the second facsimile system Get up from sleep mode.

On the other hand, when starting up from the sleep mode by the CI signal from the second line, the second line control unit 2b
Of the second line detects the CI signal from the second line, and outputs this CI detection signal to the second facsimile controller 1b.
In response to this, the clock control unit 11b sets the facsimile control unit 1b and the line control unit 2
The clock output for b is started, and the start-up operation is performed. Then, the facsimile control section 1b and the line control section 2b perform a normal incoming call operation.

In this case, the clock is not supplied to the first facsimile control unit 1a and the first line control unit 2a unless the operator designates the first line in the transmission operation or the CI signal does not arrive on the first line. . Therefore the first
Facsimile system remains in sleep mode.

Here, when reception is performed after the incoming call operation, the received image data is stored in the memory of the second facsimile control unit 1b as code data as it is. After the reception is completed, the second facsimile control unit 1b activates the activation signal of the first facsimile control unit 1a input to the first facsimile control unit 1a and activates the first facsimile control unit 1a and the first line. The control unit 2a is activated from the sleep mode, and the second facsimile control unit 1b
The received data is transferred to the first facsimile control unit 1a, which is decoded by the first facsimile control unit 1a and printed out by the printer unit 6.

Further, the second facsimile control section 1b
After the transfer of the received data to the first facsimile control unit 1a is completed, the clock control unit 11b is controlled to stop the clock of the line control unit 2b itself, and immediately shift to the sleep mode.

The first facsimile control unit 1 as described above
FIG. 5 shows a sequence of operations in the actual communication between a and the second facsimile controller 1b.

As shown in FIG. 5, when reception is performed via only the first line, the first facsimile control unit 1a (and the first facsimile control unit 1a) receives an activation signal in response to the arrival of the CI signal from the first line. The line control unit 2a) is activated to perform reception and image output, and the second facsimile control unit 1b (and the line control unit 2b) is kept in a standby state (sleep mode), that is, a stopped state. The same applies to the case where transmission is performed via only the first line.

In the case of performing reception only via the second line as 2 in FIG. 5, first, the second facsimile control unit receives an activation signal corresponding to the arrival of the CI signal from the second line. 1b is activated to perform reception, and stores the received data in its own memory. After the reception is completed, the first facsimile controller 1a is activated by an activation signal from the second facsimile controller 1b, and the received data is transferred from the second facsimile controller 1b to the first facsimile controller 1a. The control unit 1a outputs (prints) an image of the received data.

In this case, the second facsimile control unit 1b
Stores the received data in its own memory until it has been transferred to the first facsimile controller 1a, stops the clock immediately after the transfer of the received data, and shifts to the standby state.

Note that the first facsimile control section 1a may be activated during reception rather than after reception, and the received data may be transferred to the first facsimile control section 1a.

When receiving the data on the first line and transmitting the received data on the second line as 3 in FIG. 5, first, an activation signal corresponding to the arrival of the CI signal from the first line is received. Activates the first facsimile control unit 1a to perform reception, sends a start signal to the second facsimile control unit 1b during reception to activate it, and transfers received data to the control unit 1b. The control unit 1b transmits the received data.

When printing is impossible due to an abnormality of the printer unit 6 such as a jam or the absence of paper, an error sound or an error is generated by the control of the first facsimile control unit 1a to notify the user of the fact. It needs to be displayed, but after an error warning for a certain time, assuming that the user is not nearby, such as at night or on holidays,
The first facsimile control section 1a shifts to the sleep mode.

Thereafter, in the case where the second line receives an incoming call, the second facsimile control unit 1b does not send an activation signal to the first facsimile control unit 1a during or after the reception, and the second facsimile control unit 1a performs the reception. The received data is stored in its own memory without stopping itself after receiving the received data. The first facsimile control unit 1a remains in the sleep mode. Then, after the troubles such as the abnormality of the printer unit 6 and the absence of paper are resolved, the first facsimile control unit 1a is started, receives data from the second facsimile control unit 1b, and performs printing.

According to the present embodiment as described above, when reception or transmission is performed only on the first line, the second facsimile control unit 1b and the line control unit 2b which do not need to operate are used. The facsimile system is in sleep mode,
In other words, when the reception is stopped and only the second line is used, the first facsimile system including the first facsimile control unit 1a and the line control unit 2a which does not need to operate until the image of the received data is output. Is stopped. Therefore, compared to the related art, it is possible to reduce the power consumption when receiving or transmitting on only one of the first and second lines.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows a configuration of the facsimile machine in the embodiment. In FIG. 4, common portions to those in FIG. 3 of the first embodiment are denoted by common reference numerals, and description thereof will be omitted.

The configuration of the second embodiment shown in FIG. 4 is different from the first embodiment of FIG. 3 in that the first and second facsimile control units 1a and 1b have power supply control units 1a and 1b, respectively.
2a and 12b are provided. This power control unit 12
a and 12b control the supply of power to the first and second facsimile control units 1a and 1b and the line control units 2a and 2b to stop or operate the control units 1a and 1b and 2a and 2b, respectively. is there.

That is, in the first embodiment, the stop and operation of the facsimile control units 1a and 1b are controlled by the clock control unit 1
In contrast to the control by 1a and 11b, in the present embodiment, the control is performed by power supply control units 12a and 12b.

During the operation of the facsimile control units 1a and 1b, the power supply control units 12a and 12b operate in the same manner as the clock control units 11a and 11b in the first embodiment. When the operations of the control units 1a and 1b become unnecessary, the control units 1a and 1b themselves are stopped, and while the control units 1a and 1b are stopped, the control units 1a and 1b are started according to the above-described activation factors. And let it work.

The operation of the facsimile apparatus of this embodiment is different from that of the first embodiment in that the stop and operation of the facsimile controllers 1a and 1b and the line controllers 2a and 2b are controlled by the clock controllers 11a and 11b. Is substantially the same as that of the first embodiment except that the power supply control units 12a and 12b are controlled by the power supply control units 12a and 12b, and the first facsimile control unit 1a and the second facsimile control unit 1b
The sequence of the operation in the actual communication is as described above with reference to FIG.

According to the present embodiment as described above, the first
Just as in the embodiment, it is possible to reduce the power consumption when receiving or transmitting on only one of the first and second lines.

Although the embodiment of the facsimile apparatus has been described above, the technology according to the present invention can of course be applied to a data communication apparatus other than a facsimile apparatus which performs data communication via a communication line.

[0073]

As is apparent from the above description, according to the present invention, there is provided a data communication apparatus for performing data communication through a plurality of communication lines and reducing power consumption when not operating. A first communication control unit for controlling data communication via a communication line and controlling output of received data; and a second communication control unit for controlling data communication via a second communication line. In the data communication device, when the first and second communication control units are stopped when not operating, and when communication is performed using only one of the first and second communication lines, the first and second communication control units are disabled. Only one of the control units, which requires an operation, is activated and operated, and the other is stopped while the operation is not required. Therefore, the power consumption when performing communication using only one of the first and second communication lines is reduced. Can be reduced and only when not operating Excellent effect that it is possible to reduce power consumption during operation can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a conventional low power consumption facsimile apparatus that can accommodate only one line.

FIG. 2 is a block diagram showing a configuration of an apparatus capable of accommodating two lines in a conventional low power consumption facsimile apparatus.

FIG. 3 is a block diagram illustrating a configuration of the facsimile apparatus according to the first embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of a facsimile apparatus according to a second embodiment of the present invention.

FIG. 5 is a table showing an operation sequence in actual communication of first and second facsimile control units in the first and second embodiments.

[Explanation of symbols]

 1a First facsimile control unit 1b Second facsimile control unit 2a First line control unit 2b Second line control unit 3 Operation panel unit 4 Document reading unit 5 Main power supply 6 Printer units 11a, 11b Clock control unit 12a, 12b Power control section 21a, 21b CI detecting means 22 Off-hook detecting means 41 Document sensor

Claims (10)

[Claims] 1. A data communication device configured to perform data communication via a plurality of communication lines, and to reduce power consumption when not operating, wherein control and reception of data communication via a first communication line are provided. A first communication control unit for controlling data output; and a second communication control unit for controlling data communication via a second communication line.
The first and second communication control units include a communication control unit that operates during the operation of the communication control unit when the operation of the communication control unit is required according to the control of the communication control unit. First and second control means for stopping the control unit itself and activating and operating the communication control unit according to a predetermined activation factor while the communication control unit is stopped are provided, respectively. The first and second communication control units are stopped when not operating by the control of the control means, and when performing data communication only via the first communication line, only the first communication control unit is used. When activated and performs data communication and performs reception only via the second communication line, the second communication control unit is activated and performs reception. During or after reception, the first communication control is performed. Is activated, and receives data from the second communication control unit in the first communication Transferred to control unit, the data communication device being characterized in that to perform the output of the received data. 2. The start factor includes: a start signal for causing the first communication control unit to start the second communication control unit; and a start signal for causing the second communication control unit to execute the first communication control unit. The data communication device according to claim 1, further comprising an activation signal for activating the data communication. 3. When receiving data via only the second communication line, the second communication control unit stores the received data until transfer of the received data to the first communication control unit is completed. 3. The data communication device according to claim 1, further comprising a memory for storing. 4. When receiving via only the second communication line, the second communication control unit may be stopped immediately after transferring received data to the first communication control unit. The data communication device according to any one of claims 1 to 3, wherein 5. When receiving data via only the second communication line and receiving data cannot be output, the second communication control unit transmits the received data to the first communication device during or after reception. The data communication device according to claim 1, wherein the received data is held in a memory without being transferred to the communication control unit and without being stopped even after reception. 6. The first and second control means includes:
The data communication device according to claim 1, wherein the communication control unit is stopped or operated by controlling output of a clock signal supplied to the second communication control unit and the second communication control unit. 7. The apparatus according to claim 1, wherein said first control means and said second control means are adapted to control said first
The data communication apparatus according to claim 1, wherein the communication control unit stops or operates by controlling power supply to the second communication control unit and the power supply to the second communication control unit. 8. A data communication device for performing data communication via a plurality of communication lines and reducing power consumption when not in operation, comprising: controlling data communication via a first communication line;
And a first communication control unit for controlling output of received data and a second communication control unit for controlling data communication via a second communication line. At times, the first and second communication control units are stopped,
When data communication is performed only through the first communication line, only the first communication control unit is activated to perform data communication, and when data is received only through the second communication line, Activate the second communication control unit to perform reception,
During or after receiving, activating the first communication control unit,
A control method for a data communication device, comprising: transmitting received data from the second communication control unit to the first communication control unit, and outputting the received data. 9. When receiving data via only the second communication line, the second communication control unit immediately transfers the received data to the first communication control unit immediately after the second communication control unit completes the transfer. The control method of a data communication device according to claim 8, wherein the control unit is stopped. 10. When receiving data via only the second communication line and receiving data cannot be output, the second communication control unit transmits the received data to the first communication unit during or after reception. 9. The control method for a data communication device according to claim 8, wherein the received data is stored in a memory without stopping the second communication control unit even after reception without transferring the data to the communication control unit.