JPH0877077A - Data processing device - Google Patents

Abstract

PURPOSE: To restore preset data even when the contents of a volatile RAM are destroyed owing to a flat battery or the like by writing inputted preset data in a RAM and also writing it even in a nonvolatile EEPROM. CONSTITUTION: When the preset data to be set is inputted from a keyboard 3 to a random access memory(RAM) 6, a CPU 1 writes the preset data in the RAM 6 and also writes it in the nonvolatile semiconductor memory (EEPROM) 7. When a new backup battery is loaded and the power source recovers, the preset data is read out of the EEPROM 7 by the CPU 1 and written in the RAM 6. Therefore, even if the contents of the RAM 6 which is the volatile memory are destroyed, the preset data set in the RAM 6 can securely be reloaded in to the RAM 6 according to the use style of a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device such as an electronic cash register or a POS (Point of Sales) system.

[0002]

2. Description of the Related Art Generally, an electronic cash register (E
In CR) etc., various totalizers such as department totalizers are provided in the random access memory (RAM) which is the main body memory, and unit prices, characters, etc. are set in these various totalizers, and in the tax table. The tax rate was set, or preset data for the entire system such as report format was set.

[0003]

By the way, although the RAM is backed up by a lithium battery or the like, if the battery runs out or the battery is removed, the contents of the RAM are destroyed. When installed, enter various setting data such as unit price again and RA
It is necessary to reset to M, which puts a heavy burden on the user and may cause a setting error. An object of the present invention is to store preset data, which has been set in the random access memory according to the usage pattern of the user, in the random access memory even if the content of the random access memory, which is a volatile memory, is destroyed due to the backup battery running out or the like. It is to be able to surely restore.

[0004]

The means of the present invention are as follows. Writable non-volatile semiconductor memory, for example, EPROM or EPR that can be rewritten within a predetermined writable count range
In the data processing device incorporating the AM, (1), the input means inputs various preset data set in the random access memory. (2) The first writing unit writes the preset data input from the input unit into the random access memory and also into the nonvolatile semiconductor memory. (3) The reading means reads the preset data from the nonvolatile semiconductor memory when the power is restored. (4) The second writing means writes the preset data read by the reading means in the random access memory. The first writing unit writes data indicating that writing is in progress to the nonvolatile semiconductor memory before writing the preset data in the nonvolatile semiconductor memory, and clears data indicating that writing is in progress at the end of writing the preset data. You may do it.

[0005]

The operation of the means of the present invention is as follows. Now, when preset data such as a unit price to be set in the random access memory is input from the input means, the first writing means writes the preset data in the random access memory and also in the nonvolatile semiconductor memory. Here, when preset data is read from the non-volatile memory by the reading means when the power is restored with a new backup battery or the like attached, the second writing means also writes the preset data in the random access memory.
Therefore, even if the contents of the random access memory, which is a volatile memory, are destroyed due to the backup battery running out, etc., the preset data set in the random access memory according to the usage pattern of the user can be reliably restored to the random access memory. be able to.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. FIG. 1 is a block diagram showing the overall configuration of the ECR. The CPU 1 is a central processing unit that controls the operation of the entire ECR according to various programs in the ROM 2. As its peripheral devices, a keyboard 3, a display unit 4, and a printer 5 are connected to the CPU 1, and their input and output are performed. Control movements. Further, the CPU 1 has a RAM 6
Are connected via a parallel bus to exchange parallel data between the CPU 1 and the RAM 6. Further, an EEPROM 7 is serially connected to the CPU 1,
And the EEPROM 7 exchange serial data bit by bit.

The ROM 2 is a read-only memory that stores not only the operating system but also application programs and the like for each destination country.
Application programs are stored for Japan and Europe, and the programs are switched under the control of the CPU 1 according to the destination country.

The keyboard 3 is provided with various keys normally provided, that is, numerical keys (not shown) for registering sales data, a department key operated at the time of department registration, and a PLU.
(Price Look Up) P operated at the time of separate registration
The keyboard 3 is a key input device having an LU key and the like.
The sales data input from are displayed and output on the display unit 4, printed out on a receipt / journal of the printer 5, and further registered in various totalizers of the RAM 6.

The RAM 6 has its memory contents protected by a backup battery (for example, a lithium battery) 8. As shown in FIG. 2, the department totalizer 6-1, the PLU totalizer 6-2, and the tax table 6-3. , A key function table 6-4 and the like. Department totalizer 6-1
Has a configuration in which unit prices corresponding to department codes, other preset data, and total sales are stored, and the PLU totalizer 6-2 corresponds to PLU codes, unit prices for each product, and other presets. It is configured to store data and total sales. The tax table 6-3 is a table used when calculating taxes, and a tax table is provided for each destination country. Key function table 6-4
Is a table for storing the function of each key assigned on the keyboard 3, and a key function table is provided for each destination country. In addition, the RAM 6 also stores system preset data for the entire ECR that specifies a report format and the like.

FIG. 3 shows a memory map of the EEPROM 7. The EEPROM 7 is for non-volatile (preserving and retaining regardless of the presence of the backup battery 8) data which the end user does not need to reset once or preset data such as the unit price set in the RAM 6 once set like the destination country. After assembling the product and before shipping, the destination country code is written in the EEPROM 7 together with the header data. Here, the header data is data of hexadecimal code "55AA" and is written in the address "0000" area of the EEPROM 7. The destination country code is arbitrarily entered from the keyboard 3 and is a code designating the United States, Japan, and Europe.
1 ”area is written. Further, when the unit price is set after the delivery to the end user, the unit price is set in the RAM 6 and the same setting is made in the EEPROM 7.
In this case, the unit price and other setting data corresponding to the departments 1 to n in the department totalizer 6-1 are stored in the address "000A" area of the EEPROM 7, and the PLU1 to 1 in the PLU totalizer 6-2 are stored. The unit price and other setting data are stored corresponding to n. Furthermore, the tax table 6-
3. The setting data forming the key function table 6-4 and the setting data of the entire system are stored in the address "000A" area of the EEPROM 7. EEPRO like this
When writing the setting data in the address "000A" area of M7, the writing flag is set in the address "0001" area of the EEPROM 7, and the writing flag is reset at the end of writing. The writing flag indicates whether or not the setting data is normally written in the EEPROM 7, and various setting data such as the unit price input from the keyboard 3 is preset in the RAM 6 and then written in the EEPROM 7. If the system is initialized during the writing of this setting data to the EEPROM 7 and the writing is interrupted, the setting data cannot be written normally to the EEPROM 7, so the writing flag is "0" and the reset data is reset data. With the flag that becomes "FF",
"FF" indicates that the setting data has been normally written in the EEPROM 7.

Further, the address "000" of the EEPROM 7
In the "3" area, the use start date by the end user, that is, the first settlement date after the first settlement after the ECR is installed or the first settlement date after the first maintenance after the service maintenance is stored, and the address "0005" is stored. The total number of print digits up to the present time after the ECR operation is stored in the area "
The number of printer error occurrences up to the present time is stored. These are used as reference data at the time of notifying the replacement time of each part such as a printer or at the time of service maintenance. The number of print digits and the number of occurrences of printer error are counted up in association with the printing operation, and are stored in the RAM 6 until the settlement process is performed, and are written from the RAM 6 to the EEPROM 7 at the time of settlement. That is, in general, the number of rewritable times of the EEPROM 7 is limited, and in order to prevent the increase of the number of times of writing, the writing to the EEPROM 7 is performed at the time of settlement at the end of the business day.

The operation of this embodiment will be described below with reference to the flow charts shown in FIGS. FIG. 4 is a flow chart showing the operation when the destination country code is set in the EEPROM 7. First, after assembling the product in the factory, various quality tests are performed, and finally the destination country is set. In this case, the destination country code is input from the keyboard 3 (step A1). Here, as the input condition of the destination country code, for example, it is premised on the operation of a MAC (memory all clear) switch or the like so that the end user cannot set it by mistake. When the destination country code is entered, the CPU 1 clears all the contents of the EEPROM 7 (writes 0FFh) (step A2), and E
The header data "55AA" is written in the address "0000" area of the EPROM 7 (step A3). After that, the destination country code is the address "000 of EEPROM 7".
2 "area is written (step A4). In addition to the factory-shipped country code setting process, when repairing at the time of service maintenance as well as at the time of factory shipment, various tests are performed after the repair (board replacement, component replacement), and finally the country of destination code is set. It is also performed when inputting. Since the destination country code is written in the EEPROM 7 as described above, even if the backup battery 8 runs out from the time of shipment from the factory to the delivery to the user, EEPRO
The contents of M7 are not affected by it and are retained as they are.

Next, after the product is delivered to the end user, an initialization process is performed at the time of initial power-on, and all the contents of the RAM 6 are erased. At that time, various setting data are written in the RAM 6 according to the usage pattern of the user. FIG. 5 is a flowchart showing the setting operation in this case. First, various setting data is input from the keyboard 3 (step B).
1). That is, the unit price and other setting data are input corresponding to each department 1 to n of the department totalizer 6-1 and the unit price and other setting data are corresponding to each PLU 1 to n of the PLU totalizer 6-2. Input, and further, the tax table 6-3,
When the setting data for the key function table 6-4 and the setting data for the entire system are input, the various input setting data are written in the RAM 6 (step B).
2).

Next, after the writing flag is set in the EEPROM 7 (step B3), the setting data in the RAM 6 is written in the EEPROM 7 (step B4), and the writing in the EEPROM 7 is completed. At this point, the writing flag in the EEPROM 7 is reset (step B5). As a result, the system is initialized while writing the setting data from the RAM 6 to the EEPROM 7,
When the writing is interrupted, the writing flag in the EEPROM 7 remains set, so it is possible to determine whether or not all the setting data is normally written in the EEPROM 7 by referring to the writing flag. become able to.

On the other hand, when the setting data is written from the RAM 6 to the EEPROM 7, the CPU 1 and the EEPROM 7 are serially connected, and the CPU 1 transfers the data bit by bit to the EEPROM 7 and writes the data. Writing processing to the EEPROM 7 is performed according to the flowchart shown in FIG. FIG. 6 is a flow chart showing in detail the write processing in steps A3 and A4 of FIG. 4 or step B4 of FIG. First, the setting data read from the RAM 6 is transferred to the EEPROM 7 bit by bit, and 1 byte of data is EEP
Write to the ROM 7 (step C1). And this one
The write data of bytes is read from the EEPROM 7 (step C2), and the read check is performed by comparing the read data with the data read from the RAM 6 (step C3). If a mismatch is detected, the same 1-byte data is stored in the EEPROM.
7 is rewritten, but the number of rewrites is 5
Limited to 5 times and less than 5 times (Step C
The process returns to the process of writing 1 byte of data to the EEPROM 7 in step 4) (step C1).

On the other hand, when a match is detected by the verify check, that is, when it is detected that the setting data from the RAM 6 is normally written in a predetermined address of the EEPROM 7, the process proceeds to step C5, and the writing of all data is completed. Check if it is not finished, RAM
Read the next 1-byte data from 6 and EEPRO
Write to M7 (step C1). Such an operation is repeated until the writing of all data is completed. When it is detected in step C4 that the number of times of rewriting is repeated 5 times, the writing operation to the EEPROM 7 ends in error.

All the setting data in the RAM 6 is E
When the data is written in the EPROM 7, the process proceeds to step C6,
Even once, it is checked whether rewriting has occurred due to a verify error. If rewriting occurs even once, noise may have caused wrong writing to the wrong address. In such a case, RA
All the setting data in M6 and all the setting data in the EEPROM 7 are compared (step C7). As a result, if a mismatch is detected (step C8), the data of the mismatch is read from the RAM 6 again, and the EEPROM 7 By rewriting the data, the write data is automatically corrected. Then, returning to step C7, all setting data are compared again, and the above correction operation is repeated until a match is detected, and when a match is detected, the write operation to the EEPROM 7 ends normally.

In FIG. 7, after mounting the backup battery 8,
It is a flowchart which is started when the main power source is turned on. First, an all clear process is performed to clear all of the tax table 6-3, the key function table 6-4, etc. together with the contents of the various totalizers, the department totalizer 6-1, the PLU totalizer 6-2, etc. in the RAM 6 ( Step D1). Next, the header data is read from the EEPROM 7 (step D2), and it is checked whether the header data is "55AA" (step D3). If the header data is not a normal code but a blank code, EEP
After the header data "55AA" is written to the ROM 7 (step D4), the US code is written to the RAM 6 as the default destination country code (step D).
8). On the other hand, if the header data is a normal code, E
Read the destination country code from EPROM 7 (step D
5) Check whether the code is a valid code, that is, a blank code "0FFh" (step D)
6). As a result, if it is not a valid code, the default destination country code (US code) is written in the RAM 6 (step D8), but if it is a valid code, the destination country code read from the EEPROM 7 is written in the RAM 6 (step D7).

After the destination country code is written in the RAM 6 in this manner, the writing flag is read from the EEPROM 7 (step D9) and it is checked whether it is set (step D10). Now, the fact that the writing flag is still set means that EEPR
This is a case where the writing is interrupted while writing the setting data to the OM7, and the data in the EEPROM 7 is not normal data. In such a case, an error notification prompting the resetting of the unit price etc. is performed. (Step D14), the process ends in error. On the other hand, if the writing flag is reset, it means that the writing to the EEPROM 7 is normally performed. Therefore, the process proceeds to step D11, where the setting data such as the unit price is read from the EEPROM 7, and it is not a blank code. It is checked whether the data is data (step D12). If it is not a valid code, the process proceeds to step D14, and an error is notified. However, if it is a valid code, a process of writing all the setting data read from the EEPROM 7 into the RAM 6 is performed. After that (step D13), the process ends normally. Such an operation is performed every time the backup battery 8 is mounted,
Even if the backup battery 8 is lost and the contents of the RAM 6 are destroyed, the unit price and the like are reset in the RAM 6 when the backup battery 8 is newly mounted.

FIG. 8 is a flow chart showing the operation at the time of settlement, which is performed when the day's business is completed. First, in the same manner as usual, the contents of various totalizers are printed out, a settlement report is issued (step E1), and the sales data of various totalizers are cleared (step E).
2). Next, the first settlement date is read from the EEPROM 7 (step E3), it is checked whether it is a blank code, that is, the first settlement date is not written in the EEPROM 7 (step E4), and if it is not written, The current date is read and set in the EEPROM 7 as the first settlement date (step E5). Therefore,
After the ECR is installed, the date of the first settlement is written in the EEPROM 7 for the first purpose of use by the end user. If the first settlement date is already written in the EEPROM 7, the date is not updated. Next, in step E6, the number of print digits and the number of times of printer error occurrence are read from the RAM 6 and EEPRO
Write it in M7.

FIG. 9 is a flow chart showing the operation at the time of setting inspection when performing service maintenance. First,
In response to the specific operation at the time of inspection, the operation according to the flowchart shown in FIG. 9 is executed, the first settlement date is read from the EEPROM 7 (step F1), and the first settlement date is not written in the EEPROM 7. Check (step F2). Here, if the first settlement date is not written, it is an inspection at the time of setting the ECR, but if the first settlement date is written, it is an inspection after the ECR operation, so the first settlement read from the EEPROM 7 The date is printed out (step F3). With this, the start date of use can be known, which will be reference data at the time of service maintenance. Then, in the next step F4, EEP
The first settlement date in ROM 7 is cleared (step F
4). Next, the number of print digits and the number of printer error occurrences are read from the EEPROM 7 (step F5), and it is checked whether the number of print digits and the number of printer error occurrences are written (step F6). If it has been written, the number of print digits and the number of printer error occurrences are printed out (step F7). Thereby, reference data for determining the life of the printer and the like can be obtained.

Since the first settlement date is cleared during the inspection as described above (step F4), when the first settlement is performed after the inspection is completed, the above-described flowchart shown in FIG. 8 is executed, resulting in step E4. Since it is detected that the first settlement date has not been written, the current date is stored in the EEPROM 7.
Is written as the first settlement date (step E5),
Therefore, when an inspection is performed in service maintenance, the first settlement date is the inspection date or the date when the first settlement is performed after the inspection.

FIG. 10 is a flow chart showing the operation executed when the power is turned on during the normal ECR operation. Now, the EEPR is performed by the initialization process (FIG. 7) when the above-mentioned backup battery 8 is mounted.
Various setting data such as destination country code and unit price are transferred from OM7
It is written in AM6. In this state, the CPU 1 first reads the destination country code from the RAM 6 (step G1) and determines the destination country code (step G2). Here, if it is the United States code, it is switched to the US processing program in the ROM 2 (step G3), if it is the Japanese code, it is switched to the domestic processing program in Japan (step G4), and if it is the European code, it is the European processing program. Switch (step G5). Then, after performing other initialization processing (step G6), the apparatus waits for key input (step G7).

Here, if there is a key input, the RAM again
The destination country code in 6 is discriminated (step G8), and the key function table in the RAM 6 is accessed according to the discrimination result (steps G9 to G11). That is, if the destination country is the United States, the key function table for the United States is accessed to retrieve the function code corresponding to the operation key (step G).
9) If it is Japan, the key function table for Japan is accessed (step G10). If it is Europe, the key function table for Europe is accessed to retrieve the function code corresponding to the operation key (step G11). Then, each function is processed and executed by the processing program and the key function code according to the destination country (step G12). For example, department-specific registration processing, PLU-specific registration processing, settlement processing, and the like are performed according to the destination country. At that time, the CPU 1 executes these processing according to various setting data in the RAM 6.

As described above, in the present embodiment, when the destination country is set, the troublesome work steps such as pad terminals and soldering which are required in the prior art are not necessary, and the destination country code can be simply keyed into the EEPROM 7. , The setting can be done extremely easily. In addition, setting data such as unit price, key function table, tax table, and report format set by the user according to the usage pattern is EEPRO
It is stored and retained in M7 and this EE is restored when the backup power is restored.
Since the setting data in the PROM 7 is written in the RAM 6, the backup battery 8 runs out,
Even if the backup battery 8 is removed, the setting data in the RAM 6 can be restored to the original state, and as a result, complicated resetting is not necessary. In addition, EEPROM7
The first settlement date, which indicates the start date of use, etc., the number of print digits, and the number of times a printer error occurs are stored and retained, and these are printed out at the time of service inspection. Sex, etc. can be confirmed,
The inspection can be performed efficiently. Furthermore, EEPR
Before writing the setting data such as the unit price to the OM7, the writing flag is set and this flag is reset at the end of the writing. Therefore, the system initialization is performed in the middle of the setting data and the writing is interrupted. Also, after that, by checking the writing flag, it can be determined whether or not the data is correctly written in the EEPROM 7.

In the above embodiment, the case where the destination country is set is listed, but the specification may be set for restaurants, liquor stores, etc. Further, in the above-mentioned embodiment, the EEPROM 7 is taken as an example of the non-volatile memory.
It may be a ROM.

[0027]

According to the present invention, even if the contents of the random access memory, which is a volatile memory, are destroyed due to the backup battery running out, etc., the preset data set in the random access memory according to the usage form of the user. Since it can be reliably restored to the random access memory, complicated resetting is unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic cash register according to an embodiment.

FIG. 2 is a diagram showing a configuration of a RAM 6;

FIG. 3 is a diagram showing a memory map of an EEPROM 7.

FIG. 4 is a flowchart showing an operation when setting a destination country.

FIG. 5 is a flowchart showing an operation when writing setting data such as a unit price to the EEPROM 7.

FIG. 6 is a flowchart showing details of EEPROM writing processing.

FIG. 7 is a flowchart showing an operation that is started when the power is turned on after the backup battery 8 is mounted.

FIG. 8 is a flowchart showing an operation at the time of payment.

FIG. 9 is a flowchart showing an operation during setting inspection.

FIG. 10 is a flowchart showing an operation started when power is turned on during normal ECR operation.

[Explanation of symbols]

 1 CPU 2 ROM 3 Keyboard 4 Display 5 Printer 6 RAM 6-1 Division Total 6-2 PLU Total 6-3 Tax Table 6-4 Key Function Table 7 EEPROM 8 Backup Battery

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // G06F 17/60

Claims (2)

[Claims] 1. A data processing device incorporating a writable non-volatile semiconductor memory, comprising: input means for inputting various preset data set to a random access memory; and preset data input from the input means. First writing means for writing to the random access memory and also to the non-volatile semiconductor memory, reading means for reading preset data from the non-volatile semiconductor memory when power is restored, and presets read by the reading means A second processing unit for writing data to the random access memory, the data processing apparatus. 2. The first writing means writes data indicating that the preset data is being written into the nonvolatile semiconductor memory before writing the preset data into the nonvolatile semiconductor memory, and data indicating that the preset data is being written at the end of writing the preset data. The data processing device according to claim 1, characterized in that