JPH0652927B2 - Storage device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a storage device for storing data.

[Prior art]

In the past, this type of device was configured to initialize the memory contents when it detects an abnormality in the memory, but since it is automatically initialized in the event of an abnormality, the user may wonder when the memory contents were initialized. There was a drawback that I did not know what value was initialized.

〔Purpose〕

The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional example,
An object of the present invention is to provide a storage device capable of knowing the initialized contents of the memory.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the facsimile machine of this embodiment.

1 in FIG. 1 is a communication circuit to which the facsimile machine is connected. 2 is a network control unit (NCU). Reference numeral 3 is a well-known modem that modulates and demodulates data. Reference numeral 4 denotes a CPU for encoding and decoding image data and controlling the entire facsimile apparatus. Reference numeral 5 is a main power supply for supplying power to each part of the facsimile machine. A power switch 6 turns on / off the main power supply. Reference numeral 7 is a memory for storing data. Reference numeral 8 denotes a battery backup circuit that switches between the main power source 5 and the battery 9 as a power source for the memory 7, and the battery backup circuit 8 switches to the battery 9 side to supply power to the memory 7 when the main power source 5 is off. . Reference numeral 10 is a recording unit for recording data, which is a well-known printer which is usually used in facsimile machines. Reference numeral 11 denotes an operation display section for inputting an operation of the facsimile machine, which comprises a key input switch and a display such as a liquid crystal display.

In the above configuration, when the main power switch 6 is turned on, the main power 5 is turned on, and the power to the memory 7 is switched from the battery 9 to the main power 5 by the battery backup circuit 8. When the main power supply 5 is turned on, the CPU 4 starts its operation and calculates the check byte of the memory backed up data according to the flow chart shown in FIG. The check byte of this data is calculated each time the data is newly stored. The value previously calculated and stored in the memory is compared with the newly calculated value of the check byte, and if they match, the value in the backup memory is judged to be correct. If they do not match, the contents of the backup memory are reset to a predetermined value and a new check byte value is calculated and stored in the backup memory. The reset value is printed in a format as shown in FIG.

FIG. 2 is a diagram showing a data storage area of the memory 7. An area 29 stores communication management data. Two
Reference numeral b denotes a storage area of the telephone number of the communication partner corresponding to the one-touch dial provided on the operation display unit 11. Reference numeral 2c is an area for storing the abbreviated name of the machine and telephone number data. Reference numeral 2d is a user software switch storage area for selecting whether or not to transmit and record the transmission source, whether or not to output a communication result report, the mode of the roll paper cut, and the presence or absence of an off-hook alarm. 2e is a communication management data check byte, 2f is a one-touch dial memory check byte,
Reference numeral 2g is an abbreviated check byte for own machine, and 2h is a storage area for a check byte for own telephone number.

Detailed description will be made below with reference to the flow chart of FIG.

First, in step S1, the check byte of the communication management data is calculated, and in step S2, it is determined whether or not the check byte value of the area 2e of the memory 7 matches. If the check byte values match, the process proceeds to step S5. If the check byte values do not match, the process proceeds to step S3.

In step S3, the communication management data is initialized and the communication management data check byte value in the area 2e of the memory 7 is rewritten to proceed to step S4.

In step S4, the data as shown in FIG. 4 (a) is output to the recording unit 10 and printed out.

Similarly, in steps S5 to S8, the one-touch dial is used, in steps S9 to S12, the abbreviated name and telephone number of the machine, and steps S13 to S1.
In FIG. 6, the abnormality determination of the data of the user software switch and the initialization and printout of each data in the case of abnormality are performed as shown in FIGS. 4 (b), (c) and (d).

"00" in the printing example of the user software switch of FIG. 4 (d)
010001 "is based on the code table of the user software switch shown in Fig. 5. In this case, the user software switch may be initialized to" 00000000 ", or" 00010001 "as shown in Fig. 4 (d). It is often initialized to a preset value.

The initialization of the memory data shown in FIGS. 4A to 4D and the printing by the recording unit 10 are performed based on the data stored in the read-only memory (ROM) of the CPU 4.

Further, in the present embodiment, printing is performed by the recording unit 10, but instead of printing, it is also possible to display on the display of the operation display unit 11.

As described above, the present embodiment allows the user to know which data in the memory was initialized and when.

Further, in the present embodiment, the CPU 4 performs the flow chart operation of FIG. 3 when the main power is turned on, but it may be performed periodically.

Further, although the facsimile apparatus has been described in the present embodiment, it is needless to say that the storage apparatus having an output means for recording or displaying data can be implemented in addition to the facsimile apparatus.

[Effect]

As described above, according to the present invention, the operator can know the abnormality of the memory and also know which data is abnormal and needs to be re-input.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall construction of this embodiment. FIG. 2 is a diagram showing each area of the memory 7. FIG. 3 is a flow chart showing the operation of the CPU 4. FIG. 4 is a diagram showing an example of printing. FIG. 5 is a diagram showing a code of the user switch. 1 is a communication line, 2 is an NCU, 3 is a modem, 4 is a CPU,
Reference numeral 5 is a main power supply, 6 is a main power supply switch, 7 is a memory, 8 is a backup circuit, 9 is a battery, 10 is a recording section, and 11 is an operation display section.

Claims (1)

[Claims] 1. A memory for storing data, a detecting means for detecting an abnormality in the data in the memory, a means for clearing the memory to a predetermined value when the detecting means detects an abnormality in the data, and the clearing means. A storage device having an output means for outputting the contents cleared from the memory.