JP3172262B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device capable of storing various data such as operation mode data or dial number data.

[0002]

2. Description of the Related Art In a recent electronic device such as a facsimile machine or a telephone, an operation mode of the device is preliminarily selected and stored in a memory, and data is read from the memory at the time of operation of the device. It is configured to operate by setting an operation mode. In an electronic device having a telephone function, telephone number data of a plurality of destinations is stored in advance in a memory together with an abbreviated number or a one-touch key, and when dialing, the abbreviated number is input or the one-touch key is operated. The telephone number data is read from the memory and dialing is performed.

Since it is necessary to retain the data in the memory even when the power is turned off, a method of backing up the memory with a battery or a method of constructing the memory with an EEPROM that does not require a battery backup has conventionally been adopted. ing.

[0004]

However, the above-described method of backing up with a battery has a problem that a battery and a backup circuit are required and the cost is increased.
On the other hand, when an EEPROM is used, a battery and a backup circuit are not required, but the EEPROM takes several msec to write, so that the response to the input of write data is slow, and the number of times of writing is fixed due to the configuration. When an unnecessary write operation is performed due to a key input error or the like when inputting write data, there is a problem that the life of the EEPROM is shortened.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been developed in an EEPROM and an EEPROM.
RAM with the same capacity as M, EEPROM and RAM
The controller is configured to read and write data to and from the RAM, and write data to the EEPROM only when the data in the RAM is changed.

[0006]

Since the present invention is constructed as described above, normal data reading / writing is performed on the RAM having a high access speed, so that the operator does not have to worry about the delay in inputting the data. The data is written into the memory only when the data is changed, and since the unnecessary write operation is not performed, it is possible to prevent the life of the EEPROM from being shortened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below using a facsimile machine as an example.

[0008] (1) is a control device for controlling the entire facsimile machine, which is constituted by a microprocessor, and controls each section according to a program in a program memory (2) in which a processing program is stored. The control device (1) performs signal processing of the read transmission original data and processing of the received signal, and generates various control signals. (3) a reading unit that optically reads a transmission original, converts the read black-and-white data into an electric signal, and supplies the electric signal to the control device (1). (4) a recording unit that drives a recording head such as a thermal head and performs printing under the control of the control device (1) based on the received signal. Reference numeral (5) denotes a data memory for storing original data read by the reading unit (3) or data subjected to signal processing, and the writing and reading of data are controlled by the control unit (1).
(6) is a storage memory for storing the operation mode data of the facsimile apparatus and the name and telephone number data of the communication partner, which is constituted by an EEPROM, and the writing and reading of data are controlled by the control unit (1). (7)
Is a working memory to which the contents of the storage memory (6) are transferred,
It has twice the capacity of the storage memory (6), and the same data is transferred from the storage memory (6) to the M1 and M2 areas. The data memory (5) and the working memory (7) are constituted by a dynamic RAM, and the stored contents are lost when the power is turned off.
, The stored contents are not lost even if the power is cut off.

A keyboard (8) is composed of a communication key, a mode key or a numeric keypad. The control device (1) which has received a key signal controls according to a program in a program memory (2) according to the key signal. (9) a display for displaying data input from the keyboard (8) or data read from the working memory (7). (1
A modem circuit 0) modulates a signal transmitted to the telephone line (L) and demodulates a signal received from the telephone line (L).
(11) is a line switching circuit for switching the telephone (12) and the modem circuit (10) to and connected to the telephone line (L), which is constituted by a relay circuit, and is controlled by the control device (1). (13) a dial signal generating circuit for automatically generating a dial signal based on the dial number data transmitted from the control device (1), which converts the dial signal into a telephone line (L) via a line switching circuit (11) To send to.

Next, the operation of the present invention having the above configuration will be described with reference to the flowcharts of FIGS.

First, a facsimile apparatus is configured such that a user can select various operation modes, such as a document density, the number of ringing rings, and an automatic switching mode, according to a use situation. Is set. That is, when the data registration mode is set by a predetermined key operation of the keyboard (8), the control device (1) that has detected the key signal starts processing in the data registration mode shown in FIG. Then, when data input indicating the operation mode set in step (S1) is performed, step (S2)
To write the input data into the M2 area of the working memory (7). Steps (S1) to (S1) until data input is completed.
The control device (1) that has detected in step (S3) that the process of 3) has been repeated and the data input has been completed proceeds to step (S4) and compares the data in the M1 and M2 areas of the working memory (7). Then, in step (S5), it is determined whether or not the data in the M1 and M2 areas match as a result of the comparison. If they match, the process proceeds to the next process. If they do not match, the storage memory (6) Is determined to have been changed, the process proceeds to step (S6), and the data in the M2 area of the working memory (7) is written into the storage memory (6), and then the process proceeds to the next process. In this case, this is a setting in the manufacturing process of the factory, and since no data is written in the M1 area of the working memory (7), M1 and M2 are compared in the step (S4).
Since the data in the area is different, the control device (1) proceeds to step (S6) and transfers and writes the data in the M2 area of the working memory (7) to the storage memory (6). When the manufacturing process is completed and the power is turned off, the data in the working memory (7) is lost, but the storage memory (6) is composed of an EEPROM and the written data is stored. The operation mode data of the standard mode set in the manufacturing process is stored.

Next, when the facsimile machine is installed at the user's place and the power is turned on, the control device (1) starts the processing shown in FIG. First, the data in the storage memory (6) is read in step (S10), and then the data is read in step (S1).
The data read in 1) is transferred to and written in both the M1 area and the M2 area of the working memory (7). As a result, the same data is written in the M1 and M2 areas of the working memory (7),
Writing of standard operation mode data is performed.

In this state, the facsimile apparatus becomes usable, and at the time of transmission and reception, the control unit (1) accesses the M2 area of the working memory (7) and performs operation control based on the operation mode data set therein. . At this time, the control device (1) does not access the storage memory (6).

Next, the operation of the user registering frequently used telephone number data in advance will be described.

First, when the mode is set to the data registration mode by a predetermined key operation of the keyboard (8) in the same manner as described above, the control device (1) starts the processing of FIG. Then, step (S
When the telephone number data is input together with the abbreviated number in 1) or the input telephone number data is input together with the one-touch key, the control device (1) in step (S2) transmits the telephone number input to the M2 area of the working memory (7). Write the number data. The working memory (7) is composed of a dynamic RAM, and the writing time is very short, so that the operator does not feel that the response from the input of data to the end of writing is slow. Similarly, when the writing of a plurality of desired telephone numbers is completed, the control device (1), which has detected the completion in step (S3), sets the working memory (7) in step (S4).
Is compared with the data in the M1 and M2 areas. The telephone number data is stored in the M2 area, but the telephone number data is not written in the M1 area and the data in the M1 and M2 areas are different. The control device (1) performs step (S6).
Then, the data in the M2 area is transferred to the storage memory (6) and written.
As a result, the telephone number data is written into the storage memory (6), and the data is updated.

Next, the operation of making a dial call based on the registered telephone number data will be described.

First, the off-hook key of the keyboard (8) is operated to control the line switching circuit (11) to control the telephone line (L).
After connecting the line to the modem circuit (10) and making a line connection, when a short number is input or a one-touch key is operated with the keyboard (8), the control device (1) which detects the key signal causes the working memory ( The corresponding telephone number data is read from the M2 area of 7), and the dial signal generation circuit (13)
To make a dial call to the telephone line (L) via the line switching circuit (11). If the other party responds to the dial call, transmission or telephone conversation can be performed.
The work memory (7) is also accessed when making a dial call in this manner, and the storage memory (6) is not accessed.

At this time, no telephone number data is written in the M1 area of the working memory (7). However, if the power supply is once turned off for some reason and then turned on again, the above-mentioned operation is performed. 3 is performed in the same manner as described above, and the data in the storage memory (6) is written to both the M1 and M2 areas of the working memory (7), so that the telephone number data is also written to the M1 area. It will be.

[0019]

As described above, the electronic device of the present invention writes and stores data that must not be lost in the EEPROM of the storage memory, and also provides a working RAM to which the contents of the EEPROM are transferred. Read / write data by access, RAM data is EEPROM
By rewriting the data in the EEPROM only when the data is different from the contents, the response when the user inputs data is made faster, and the number of times of writing to the EEPROM is minimized to prevent the life of the EEPROM from being shortened. This is a very practical effect.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an electronic device of the present invention.

FIG. 2 is a flowchart showing an operation state of FIG.

FIG. 3 is a flowchart showing an operation state of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control device 3 Reading part 4 Recording part 5 Data memory 6 Storage memory 7 Working memory

Continuation of front page (56) References JP-A-2-81398 (JP, A) JP-A-63-66797 (JP, A) JP-A-61-201356 (JP, A) JP-A-5-81148 (JP, A) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 12/16

Claims (1)

(57) [Claims] A power supply for storing and holding data.
Storage memory that does not require
Memory and work requiring power backup
To memory, storage memory, data memory and working memory
A control device for controlling reading and writing of the
Device stores the data in the storage memory and the data memory.
Transfer data to the work memory, and read / write normal data
For the data memory and the working memory.
Only when the data does not match, the data in the working memory
Controlling to transfer and write to storage memory
Electronic equipment.