JPS6227759A - Count integrating device - Google Patents

Abstract

PURPOSE:To increase the number of times of rewritability and to reduce frequencies in replacement by storing data of a total counter number in plural counter areas of an electrically rewritable ROM where data of the total counter number is stored and rewriting it on another counter area when the ROM exceeds the number of times of rewritability. CONSTITUTION:The memory area of an electrically rewritable ROM1 is divided into locations LA-LD, and data of the total counter number is stored in locations LA and LB, and data of a life counter number which is the number of times of rewritability of a nonvolatile cell is stored in the location LC, and data of an initial total counter number just after power-on is stored in the location LD. Rewrite is performed on the location LB when rewrite on the location LA is impossible, and memory replacement is indicated when rewrite on the location LB is impossible. Thus, the life of the ROM1 is extended to reduce frequencies in the replacement of the ROM1.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a copying machine equipped with a memory circuit for storing data of a total counter number whose memory content must be maintained even when the power is not turned on. The present invention relates to a counting and accumulating device for a device.

[Technical Background of the Invention] In recent years, copying apparatuses have been developed that are equipped with a memory circuit that stores a cumulative value of the number of copies that have been performed as a signal.

This memory circuit is called a total counter, and holds the accumulated value using, for example, an electrically rewritable ROM when the power is on and when the power is off.

The count written in this memory circuit is used for determining the timing of maintenance, calculating copy costs, etc.

In such conventional counting and accumulating devices for copying machines, those that use an electrically rewritable ROM as a storage circuit for storing data on the total counter number have a memory capacity that stores the data on the total counter number. is an electrically rewritable ROM consisting of the same RAM cell and nonvolatile cell, and inputs detection signals from switches, sensors, etc. to control high voltage transformers, motors, etc., and connects the I10 port, interface, etc. to the bus. There is also a control device (CPU) that exchanges signals through the ROM and controls the ROM, which can be roughly electrically rewritten.

In this apparatus, when the power is turned on, the CPU enters a preparation state, and thereafter enters an operating state and becomes ready for copying. When the copy is made, the CPU outputs one pulse, and this pulse is input to the electrically rewritable ROM RAM cell and non-volatile cell, and the total counter up to the present stored in the non-volatile cell is Number data is RA
It is input into the M cell.

Roughly, the data of the total counter number up to the present written in the RAM cell is input to this CPU for each copy, and the data of the total counter number is counted up for each copy, and then the data of the RAM cell is While being rewritten, the total counter number data stored in the non-volatile cell is input to the CPU, and the CPU compares the total counter number data of the RAM cell with the total counter number data of the non-volatile cell to determine if there is a difference. At this time, one pulse is input from CPtJ to a RAM cell and a nonvolatile cell of an electrically rewritable ROM, data stored in the RAM cell is input to the nonvolatile cell, and the data is rewritten.

In other words, the data of the total counter number counted up for each copy is incorrect! The data input to the ζ volatile cell and stored in the nonvolatile cell is rewritten to the data of the total counter number counted up.

[Problems with the Background Art] However, in the above-mentioned electrically rewritable ROM, the lifetime of the number of rewrites of the nonvolatile cell is very short, so the electrically rewritable ROM must be replaced frequently. Therefore, maintenance was required frequently.

[Object of the Invention] The present invention has been made in response to the above-mentioned circumstances, and by improving the lifespan of an electrically rewritable ROM that stores data of the total counter number,
It is an object of the present invention to provide a counting and integrating device that can reduce the frequency of replacing this electrically rewritable ROM.

[Summary of the Invention] In other words, the counting and accumulating device of the present invention includes a counting device, an electrically rewritable ROM that stores the data of the total counter number of the counting device, and a ROM that stores the data of the total counter number of the counting device, and In the counting integration device comprising a control device that rewrites the data of i~-total counter number stored in the ROM that can be rewritten to ROM with the data of the total counter number that has been counted up, the electrically rewritable ROM The memory area includes a plurality of counter areas storing data of a total counter number and the electrically rewritable ROM.
and a life counter area for storing data on the number of life counters stored in the life counter area, and the control device rewrites the data on the number of life counters stored in the life counter area and the electrically rewritable ROM. When the life counter number data becomes larger than the possible number of rewrites, it is written to another counter area, and the subsequent rewriting of the total counter number data is performed in this area. electrically rewritable RO that stores total counter number data.
This improves the life of the number of rewrites of M and reduces the frequency of replacement.

[Embodiments of the Invention] Hereinafter, details of embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram for explaining one embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining an electrically rewritable ROM of this embodiment, and FIGS. FIG. 6 is a flowchart for explaining the operation of this embodiment.

As shown in FIG. 1, the counting and accumulating device of the copying machine of this embodiment includes an electrically rewritable ROM 1 in which data from 1 to -tal counter numbers are recorded and stored, and detection signals from switches, sensors, etc. A control unit (CPU) 2 inputs the information to control the high voltage transformer, motor, etc., exchanges signals with the I10 board, interface, etc. via the bus, and further controls the electrically rewritable ROMI. Consisting of゛As shown in Fig. 2, the electrically rewritable ROM consists of a RAM cell 1a with the same memory capacity and a non-volatile cell 1b, and it is possible to manually input the m pulses output by the CPU 2. The structure is such that all the memory contents of the RAM cell 1a are transferred to the non-volatile cell 1b, and by inputting the m pulse, all the memory contents of the non-volatile cell 1b are transferred to the RAM cell 1a. .

Furthermore, the electrically rewritable ROMI's main area is divided into locations LA and LD, as shown in Figure 3, and locations LA and LB have data for the total counter number, and location LC has data for the total counter number. Life counter number data, which is the number of times the nonvolatile cell has been rewritten, the initial value immediately after the power is turned on in the location LD]・-
The data of the number of tall counters is stored respectively.

The operation of the counting and accumulating device of the copying machine of this embodiment configured as described above will be explained based on the flowcharts shown in FIGS. 4 to 6.

First, when this device is turned on (Figure 4-a)
The CPU 2 enters the preparation state, and then enters the operating state and becomes capable of copying. However, when in the γM preparation state, the CPU 2 outputs m pulses (Fig. 4-b), and this "tan pulse" is transmitted to the electrically rewritable ROM 1. The data of the total counter number up to the present, which is input to the RAM cell 1a and the non-volatile cell 1b and stored in the non-volatile cell 1b, is input to the RAM cell 1a.

It is roughly controlled by the CPU 2 as follows.

The data of the number of life counters stored in the electrically rewritable ROM1 location LC is input,
Life counter number data and R that can be electrically rewritten
Compare the number of times α in which the non-volatile printing cell 1b of OM1 can be rewritten (Fig. 4-C). When the data of the life counter number is smaller than the number α that can be rewritten by 9, the location LA is used as a memory area (Fig. 4-C). Figure 4-d). In addition, when you are interested, compare the data of the number of life counters and the double value 2α of the number of times α that can be rewritten (Figure 4-e), and the data of the number of life counters is the double value of the number of times α that can be rewritten N. For a knife smaller than 2α, location LB is used as memory area 1 (FIG. 4-f). In the case of a coarsely large cutout, a memory exchange signal is outputted and inputted to the display device, and is displayed by, for example, a lamp mounted on the surface of the panel of the copying machine (FIG. 4-g).

In other words, when it becomes impossible to rewrite the location LAFI, a memory replacement display is displayed at the location LB, and when it becomes impossible to rewrite the location LB.

Then, when the memory exchange display is not performed, the data of the total counter number stored and hidden in the locations LA to LB is input to the location LD and is stored as the data of the initial value total force "Kunta number" (the fourth
Figure-h).

Thereafter, the CPU 2 becomes operational and the copying apparatus becomes ready for copying (FIG. 4-1).

For each copy (Fig. 5-a), the location LA
It is confirmed whether or not the location LA is in use (Fig. 5-b), and when the location LA is in use, the
Figure -〇). When location LA is not in use, location LB (FIG. 5-d) performs the following operations.

That is, for each copy, the data of the total counter number up to the present stored in the RAM cell 1a of the log region LA or location LB is input to this CPU 2,
Each time a copy is made, the data of the total counter is counted up, and the data in the RAM cell 1a at the location LA or LB is rewritten one by one.

Then, when the power is turned OFF, the power OFF detection device detects the power OFF state and the power is turned ON.
An FF signal is output and input to the CPU 2.

Then, the CPU 2 inputting the power OFF signal confirms whether or not the location LA is in use (Fig. 6-b).
).

Then, when the location LA is in use, compare the data of the number of 1 to - total counters stored in the location LA with the data of the initial total counter number immediately after power-on stored in the location LD (Figure 6-C). , when they are equal, the process ends, but when they are different, the data of the life counter number of the location LC is counted up and rewritten (Fig. 6-d), and then the number of times that can be rewritten is equal to the data of the life counter number. It is confirmed whether or not (Fig. 6-e). and 5 TOTE at different times
When the pulse is output (Fig. 6-f), the processing is completed, but when they are equal, the data of the number of talk loop counters stored in the location LA is input to the location LB, and is recorded in the location LB (Fig. 6-f). g). then 5
The TORE pulse is output (FIG. 6-f), and the process is completed.

Also, compare the total counter number data stored in location LB when location LA is not in use with the initial total counter number data stored in location LD immediately after power-on (FIG. 6-h). If they are equal, the process ends, but if they are different, the location L
The life counter number data of C is counted up and rewritten (FIG. 6-i), and then 5 TORE pulses are outputted (FIG. 6-j), and the process is completed.

Further, 5TORE pulses are inputted from the CPU 2 to the electrically rewritable RAM cell '121 of the ROMI and to the nonvolatile cell 1b, and the data stored in the RAM cell 1a is inputted to the nonvolatile cell 1b and the data is rewritten.

Therefore, as mentioned above, an electrically rewritable RO
By making M1 have multiple memory areas, and when it becomes impossible to rewrite the total counter number data at location LA, it can be rewritten at location LB. This extends the lifespan of ROMI, which can be electrically rewritten, and The frequency of replacing the ROM 1, which can be rewritten in advance, is reduced, and as a result, the amount of maintenance required for this copying apparatus is reduced.

a3 In the above-described embodiment, there were two memory areas in which the data of the total counter number of the electrically rewritable ROM 1 was rewritten, but the present invention is of course not limited to this. If it is more than 2, the life span of the number of rewrites of RON=1 that can be electrically rewritten becomes longer in proportion to that number.

[Effect 1 of the Invention As explained above, according to the counting and accumulating device of the present invention, the electrically rewritable ROM that stores the data of the total counter number has a plurality of counter areas, one of which
By storing the data of the total counter number in one counter area and rewriting it to another counter area when the counter area exceeds the number of times that can be rewritten, the electric power that stores the data of the total counter number is The life span of the electrically rewritable ROM can be improved, and the frequency of replacing the electrically rewritable ROM can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining one embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining an electrically rewritable ROM of this embodiment, and FIGS. FIG. 6 is a flowchart for explaining the operation of this embodiment. 1... ROM1 that can be electrically rewritten
a...RAM cell 1b...Non-volatile cell 2...CPU Applicant Toshiba Corporation Patent attorney Satoshi Suyama - Figure 1 Figure 3

Claims (2)

[Claims] (1) A counting device, an electrically rewritable ROM that stores data on the total counter number of the counting device,
and a control device that rewrites the data of the total counter number stored in the ROM when counted with the data of the total counter number that has been counted up, a memory area of the electrically rewritable ROM. is a plurality of counter areas storing data of the total counter number and the electrically rewritable ROM.
and a life counter area for storing data on the number of life counters stored in the life counter area, and the control device rewrites the data on the number of life counters stored in the life counter area and the electrically rewritable ROM. When the life counter number data becomes larger than the possible number of rewrites, it is written to another counter area, and the subsequent rewriting of the total counter number data is performed in this area. A counting and integration device featuring: (2) The counting and integrating device according to claim 1, which is a counting and integrating device for a copying machine.