JPS63204861A - Data communication terminal equipment - Google Patents

Abstract

PURPOSE:To reduce the accumulative power consumption by allowing a communication processing CPU to hold the power supply even when a main power switch is turned off and holding the power supply even during the transmission/ reception processing. CONSTITUTION:The power supply holding means 7 executes the power supply to the main CPU 1 and the communication processing CPU 4 by the application of main power supply switch and when the CPU 4 is in the transmission reception processing, even when the main power switch is disconnected to hold the power supply to the CPU 4. Thus, the power is not required to give all the sections and the accumulative power consumption is reduced and the durability is improved. When the power supply is stopped, the hold means 7 holds the content of the data buffer memory 15 and when the power supply to the CPU 4 is stopped, the memory 5 stores the status information such as reception data and the normal end of the transmission processing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a data communication terminal device that performs data communication via a telephone line.

[Prior Art] Currently, data communication via public telephone lines is becoming popular. This data communication can generally be performed using a telephone device with a modem (modulator/demodulator) and an information processing device such as a personal computer.

FIG. 3 is a configuration diagram showing a conventional data communication terminal device. In FIG. 3, (16) is a telephone device with a modem, and this telephone device (16) with a modem is a telephone rosette (plug) (14) and is used by being connected to a general subscriber line.

This telephone device with a modem (16) can be used not only as a normal telephone device but also as a data processing device using a public telephone line by connecting it to an information processing device such as a personal computer (18) via a signal cable (17). It is configured so that it can be used as a communication system.

FIG. 4 shows an example of the internal configuration of the modem-equipped telephone device (16). In addition to the basic functions of a normal telephone device, this modem-equipped telephone device (16) has a telephone line (
15) is provided with an additional function for data communication.

The basic functional elements of a telephone device include an incoming call detection circuit (
19), hook switch (27), ringer circuit (2)
8), dial switch (29), dial circuit (30)
), photocoupler (31), and communication circuit (33).

Of these, the telephone circuit (20) except the incoming call detection circuit (19)
) is stored within. Here, the telephone circuit (20)
The hook switch (27) inside is a common contact (27a)
, a make contact (27b), and a break contact (27c), and normally the handset can be switched on and off by disconnecting it.

When the handset is placed on the main unit, the common contact (27g) of the hook switch (27) is connected to the make contact (27).
b) and enters a standby state waiting for an incoming call, a so-called hook-on state. When the handset is lifted, the common contact (27a) connects to the make contact (27b), resulting in a hook-off state in which calls or communications are possible. Additional functional elements for data communication include modems (3
4), a signal terminal (21) for connection with a personal computer, etc., a control circuit (35), a function selection switch (36) for setting the operating mode, etc., a relay contact (26a) for switching the operating mode. ), (26b)
, (26c) and (32a), (32b), (32c)
etc. are provided. Note that in the illustrated switching state, an operating mode as a telephone device is set.

In addition, in order to provide power for the above-mentioned functional elements, especially additional functions for data communication, a power plug (23) and an AC power supply (commercial AC10
A DC power supply circuit (24) is provided that generates a DC power supply (Vc) of a predetermined voltage from 0V).

When performing data communication using the above-mentioned telephone device with a modem, the signal terminal (21) is connected to the personal computer via a cable.
It is connected to the input/output board (I10) of a computer, etc., and the relay contacts (32a) and (32c) are connected by a command from the connected personal computer, etc. or by setting the function selection switch (36). put.

In the case of transmission, a transmission command is given to the control circuit (35) from a personal computer or the like connected to the signal terminal (21). Upon receiving this command, the control circuit (35) connects the relay contacts (26a) and (26c) to create the same state as off-hook, and the dial circuit (30)
) to generate a dialing signal for calling, a so-called automatic dialing operation.

After the four wires are connected, digital transmission data input from a personal computer or the like via the signal terminal (21) is sent to the telephone line (15) via the modem (34).

In the case of an incoming call, the detection output of the incoming call detection circuit (19) is given to the control circuit (35). Upon receiving this detection output, the control circuit (35) connects the relay contacts (26a) and <26c) to create a state similar to off-hook and prepare for reception, which is what is called an automatic call reception operation.

This allows data received via the telephone line (15) to be sent to a personal computer or the like via the modem (34) and signal terminal (21).

In the manner described above, data communication via telephone lines can be performed.

[Problems to be Solved by the Invention] Since the conventional data communication terminal device is configured as described above, data communication is performed by combining a telephone device with a modem and an information processing device, and transmission/reception processing is Information processing equipment such as personal computers connected to the modem-equipped telephone device must be turned on at all times while the telephone is in use, increasing cumulative power consumption and shortening the lifespan of the equipment. There were m points in between.

This invention was made to solve the above-mentioned problems, and by making it possible to transmit and receive data without constantly supplying power to all parts of the data communication terminal device, the cumulative An object of the present invention is to obtain a data communication terminal device that can reduce power consumption and improve durability.

[Means for Solving the Problems] In the data communication terminal device according to the present invention, when the main power switch is turned on, the main CPU and the communication processing CPU are connected to each other.
power supply means that simultaneously supplies power to the communication processing CPU and maintains power supply to the communication processing CPU even when the main power switch is turned off when the communication processing CPU is in the process of transmitting and receiving data, and is controlled by the communication processing CPU; and a holding means for holding the contents of the data buffer memory even if power supply to the communication processing CPU is stopped.

[Function] The power supply holding means in the present invention is configured to supply power to the main CPU and the communication processing CPU by turning on the main power switch.
By simultaneously supplying power to the communication processing CPU and maintaining the power supply to the communication processing CPU even if the main power switch is turned off when the communication processing CPU is in the process of transmitting and receiving data, all parts are always powered on. It does not need to be supplied, reducing cumulative power consumption and improving durability.

In addition, the holding means retains the contents of the data buffer memory even when the power supply is stopped, so that when the power supply to the communication processing CPU is stopped, the data buffer memory can be used to check whether received data or transmission processing has been completed normally. Remember and retain status information.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure, (1) is the main CP that performs various information processing.
U, (2) is a main memory device that stores data used by the main CPU (1) and newly created data, (
3) is a display device (hereinafter abbreviated as CRT) that displays information from the main CPU (1) as characters and graphics; (4) is a communication processing CPU;
U performs processing such as data transmission and reception based on commands from the main CPU (1).

(5) is a data buffer memory, and this data buffer memory (5) is used as a work memory for the communication processing CPU (4), and stores transmitted/received data and various status information associated with transmission/reception.

(6) is the power supply holding control output of the communication processing CPU (4), which outputs to maintain the power supply when the communication processing CPU (4) is in the process of transmitting and receiving, and supplies power when the communication process CPU (4) is not in the process of transmitting and receiving. output so that it is not retained.

(7) turns the power supply 0N by the power supply holding control output (6)
This is a relay contact that serves as a power supply holding means with 10FF. (8) is a main power switch consisting of interlocking contacts (8a) and (8b), and the contact (8a) on the AC100V side turns on and off the power supply circuit (9), and the contact (8b)
) are main CF'U (1), main memory (2), C
Turn on and off the power to RT (3).

(10) is a keyboard for inputting information to the main CPU (1), and (11) is a communication processing C with the main CPU (1).
A communication line (12) is a communication line for exchanging data and commands with the PU (4), a power line (12) is a power line that supplies power to the communication processing CPU (4) and data buffer memory (5),
3) is a buffer battery as a holding means for holding the contents of the data buffer memory (5) when the power supply to the data buffer memory (5) is stopped.

FIG. 2 is a flowchart showing the operation of one embodiment of the present invention. Below, based on the flowchart in Figure 2,
The operation of simultaneous broadcasting, which transmits the same data to multiple parties, will be explained. Operate the main power switch (8) and turn on the contacts (8a) and (8b).

The power supply circuit (9) is connected to the power supply circuit (9) via the contact (8a).
V is supplied to the main CPU (1) and the communication processing CPU.
(4) A power supply necessary for the operation of each part of the data communication terminal device is generated.

A part of the power supply created by the power supply circuit (9) is connected to the contact (8b)
Through main CPU (1), main memory device (2)
, CRT (3), and each part starts operating. At the same time, power is supplied to the communication processing COU (4) and the data buffer memory (5) via the power line (12) to start operation.

Next, when a -broadcast start signal is input from the keyboard (10), the main cPU (1) starts processing the broadcast command as shown in the second tooth, and sends the broadcast to the communication processing CPU (4). Send commands. When the communication processing CPU (4) receives the broadcast command, it initializes the broadcast processing.

Communication processing CPU (4) is data buffer memory (5)
Checks whether the area is free and whether the sent file can be received, etc., and if it is OK, the main C
Send OK to PU (1).

Next, the main CPU (1) reads the transmission file to be transmitted from the main memory device (2), and the communication processing CPU (4) reads the transmission file to be transmitted from the main memory device (2).
). In addition to the transmission data, the transmission file contains the telephone number of the transmission destination, the number of attempts, and the name and telephone number of the transmission source.

The communication processing CPU (4) writes the transmission file transferred from the main CPU (1) into the data buffer memory (5). When the transmission of the transmission file is completed, the communication processing CPU (4) closes the relay contact (7) by the power supply holding control output (6), and even if the main power switch (8) is turned off, the communication processing CPU (4) Prevent the power supply from being interrupted.

Next, the communication processing CPU (4) returns a response to the main CPU (1) indicating that the transmission file transfer has been completed and broadcasting has started. The main CPU (1) that received the response is CR
T (3) etc. to display the execution of broadcast processing.

On the other hand, the communication processing CPU (4) starts dialing to the first destination, checks the response from the other party, and transmits the file. When the file transmission to the first destination is completed, the file is sent to the second destination using the same procedure as the first destination. File transmission will be performed regarding.

When all file transmission is completed, the communication processing CPU (4)
writes the file transmission completion status to the data buffer memory (5), then opens the relay contact (7) with the power supply holding control output (6), and when the main power switch (8) is turned off, the communication processing CPU (4) ) to stop the power supply.

When the main power switch (8) is turned off during the communication processing CPU (4), the contact (8b) is opened;
Main CPU (1), main main device (2), CR
Power supply to T (3) is stopped.

At the same time, the contact (8a) is also opened, but since the relay contact (7) is closed, the AC10 is not connected to the power supply circuit (9).
0V power continues to be supplied, and power supply to the communication processing CPU (4) and data buffer memory (5) is maintained through the power line (12).

When the broadcast processing is completed, the communication processing CPU (4) writes the broadcast processing completion status into the data buffer memory (5) as described above, and then opens the relay contact (7).

When the relay contact (7) is opened, the main power switch (8) is already OFF, so the power circuit (9)
) is no longer supplied with AClooV, and the communication processing CP
U (4), power supply to the data buffer memory (5) is stopped.

At this time, the contents of the data buffer memory (5) continue to be retained by the backup battery (13), so
When the main power switch is turned on again to operate the data communication terminal device of the present invention, the main CPU (1) reads the communication status via the communication processing CPU (4) and the processing is completed normally. You can know whether

In addition, in the above embodiment, a relay contact (7) is used as the power supply holding means for the communication processing CPU, but the SCR
Even if a semiconductor switch such as the above is used, the same effect as in the above embodiment can be obtained.

[Effects of the Invention] As described above, according to the present invention, the power supply to the communication processing CPU is maintained even when the main power switch is turned off,
In addition, since the power supply is maintained even during transmission/reception processing, it is not necessary to constantly supply power to all parts when performing data/event communication, reducing cumulative power consumption. This has the effect of providing a data communication terminal device with excellent durability and long device life.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a data communication terminal device according to an embodiment of the present invention, FIG. 2 is a flow chart diagram showing the operation of the data communication terminal device according to an embodiment of the present invention, and FIG. FIG. 4 is a block diagram showing the internal structure of a telephone device with a modem, which is a component of a conventional data communication terminal device. In the figure, (1) is a main CPU, (4) is a communication processing CPU, (5) is a data buffer memory, (7) is a power supply holding means (relay contact), and (13) is a backup battery. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Patent attorney Masuo Oiwa (and 2 others) Procedural amendment (voluntary) 1. Indication of the incident: Patent Application No. 62-036234 2,
Name of the invention: Data communication terminal device 3, Representative of the person making the amendment: Moriya Shiki 4, Agent address: Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo 5, Invention of the specification subject to the amendment Detailed description field. 6. Contents of correction

Claims (1)

[Claims] (1) Main CPU in charge of information processing functions in a data communication terminal device that performs data communication via a telephone line
, a communication processing CPU in charge of communication processing, a data buffer memory provided in the communication processing CPU, and when the main power switch is turned on, the main CPU and the communication processing CPU
If power is supplied to U at the same time and the communication processing CPU is in the process of transmitting and receiving data, the power supply to the communication processing CPU is maintained even if the main power switch is turned off, and the power supply is controlled by the communication processing CPU. A data communication terminal device comprising: a holding means; and a holding means for holding the contents of the data buffer memory even if power supply to the communication processing CPU is stopped.