JP5715878B2 - Electronic cash register - Google Patents

Description

The present invention relates to an electronic cash register using a storage medium with a limited number of rewrites.

  Conventionally, in an electronic cash register (Electronic Cash Register: abbreviation “ECR”), a random access memory (Random Access Memory: abbreviated “RAM”) capable of memory backup as a device for storing a product master, for example, a static RAM (hereinafter referred to as “RAM”) "SRAM").

  In order to store data of a product master using a Japanese product identification number (Japanese Article Number: abbreviated as “JAN”) having a large number of products, it is necessary to use a large-capacity SRAM. However, since the SRAM has a high cost, that is, a product unit price, when a large-capacity SRAM is used, the product cost of the ECR becomes high and the profit rate of the product decreases.

  Therefore, by using a flash memory (commonly referred to as “flash ROM (Read Only Memory)”, hereinafter referred to as “flash ROM”), which is a low-capacity large-capacity memory compared to SRAM, as a product master storage memory, a profit rate is achieved. We are trying to improve. However, the flash ROM has a demerit that the number of times of rewriting is limited as compared with the SRAM, and rewriting, that is, overwriting and updating cannot be performed unless the stored data is erased. Therefore, the flash ROM is not suitable for storing data that is frequently rewritten such as daily sales amount and change in unit price.

  As a prior art, there is a journal writing method described in Patent Document 1. In this journal writing method, the processing unit journals to a flash advanced technology attachment (abbreviated as “ATA”)-personal computer (abbreviated as “PC”) card (hereinafter referred to as “flash ATA-PC card”). After opening the data file, the input journal data is temporarily recorded in the journal data temporary storage area of the RAM. When the size of the journal data recorded in the journal data temporary storage area becomes equal to or larger than the sector size, the processing unit records journal data for the sector size on the flash ATA-PC card. The processing unit closes the journal data file when terminating the system. In this way, the number of rewrites to the file allocation table (File Allocation Table: abbreviated as “FAT”) area formed on the flash ATA-PC card is set to one at the end of the system, and the flash ATA-PC card is used. The possible period is extended.

JP 2001-209567 A

  However, the above-described conventional technique is effective when the amount of journal data stored in the journal data temporary storage area of the RAM is small. However, when the amount of data such as JAN is large, it is necessary to increase the capacity of the RAM. There is a problem that the cost increases.

An object of the present invention is to provide an electronic cash register capable of reducing the amount of use of expensive RAM and extending the usable period of a flash ROM with a limited number of rewrites when updating a large amount of data. It is to be.

The present invention provides a first storage means having no limit on the number of rewrites,
A second storage means with a limited number of rewrites;
Of the information about the plurality of items related to the product, the first item information whose rewrite frequency is equal to or higher than a predetermined reference frequency is stored in the first storage means, and the second rewrite frequency is less than the predetermined reference frequency Control means for associating the item information with the first item information and storing it in the second storage means, wherein the first item information and the second item information corresponding to each other are An electronic cash register comprising: a storage means and a control means for performing transaction processing based on the read information of the first item and the information of the second item, read from the second storage means is there.

In the present invention, the first storage means stores identification information for identifying each product,
The control means stores information on the first item in the first storage means in association with the identification information, and stores information on the second item in the second storage means in association with the identification information. It is memorized.

  According to the present invention, the control means causes the first storage means to store the specific information for specifying the address of the second storage means in which the information of the second item is stored in association with the identification information. It is characterized by.

  According to the present invention, when the control means updates the information of the second item stored in the second storage means, the second information after the change is deleted without deleting the information of the second item before the change. The information of the item is written in the unwritten area of the second storage means, the specific information stored in the first storage means is specified, and the address where the changed second item information is written is specified It is characterized by rewriting the specific information.

In the present invention, the identification information is represented by a natural number,
The control means associates the information of the first item with the identification information and stores it in the first storage means in ascending or descending order of the identification information, and associates the information of the second item with the identification information. The identification information is stored in the second storage means in ascending or descending order.

According to the present invention, the first storage means has no limit on the number of rewrites. The second storage means has a limit on the number of rewrites. And a control means memorize | stores the information of the 1st item in which the rewriting frequency is more than the predetermined reference frequency among the information about the several item regarding goods in the 1st memory | storage means, and the rewriting frequency is predetermined reference frequency The information of the second item that is less than the number is stored in the second storage unit in association with the information of the first item . The control means reads the first item information and the second item information corresponding to each other from the first storage unit and the second storage unit, and reads the read first item information and second item information. Transaction processing based on information. Therefore, the amount of use of the first storage means, for example, an expensive SRAM can be reduced, and the cost can be reduced. In addition, since information with low rewrite frequency is stored in the second storage means having a limited number of rewrites, the usable period of the second storage means, for example, the flash ROM, can be extended.

  According to the invention, the first storage means stores identification information for identifying each product. Then, the control means stores the information on the first item in the first storage means in association with the identification information, and stores the information on the second item in the second storage in association with the identification information. Memorize in means. Therefore, information of a plurality of items can be managed for each identification information.

  According to the invention, the control means stores in the first storage means the specific information for specifying the address of the second storage means for storing the information of the second item in association with the identification information. Let Therefore, the information of the second item stored in the second storage unit can be specified by the specific information stored in the first storage unit.

  According to the invention, the control means updates the information of the second item stored in the second storage means without deleting the information of the second item before the change. The address in which the information of the second item is written in the unwritten area of the area of the second storage means, the specific information stored in the first storage means is written with the information of the second item after the change Rewrite with specific information to identify. Therefore, even if the information of the second item is updated, it is not necessary to erase the second storage means, and the usable period of the second storage means, for example, the flash ROM can be further extended.

  According to the invention, the identification information is represented by a natural number. The control means associates the information of the first item with the identification information and stores the information in the ascending or descending order of the identification information in the first storage means, and corresponds the information of the second item to the identification information. In addition, the identification information is stored in the second storage means in ascending or descending order. Therefore, a search based on identification information can be easily performed.

It is a block diagram which shows the structure of ECR1 which is one Embodiment of this invention. It is a figure which shows the structure of the merchandise master information. It is a figure which shows the structure of the information memorize | stored in RAM12. 3 is a diagram showing a configuration of information stored in a flash ROM 13. FIG. It is a figure which shows the structure of the information memorize | stored in program storage ROM14. 4 is a diagram showing a configuration of a flash ROM block configuration table 144. FIG. It is a figure which shows the structure of the goods master information memory structure table. 3 is a diagram showing a configuration of a flash ROM write pointer table 126. FIG. It is a figure which shows the structure of the merchandise master index information. It is a figure which shows the information memorize | stored in the record which a record pointer shows. It is a figure which shows the structure of the 2nd goods master information 131 memorize | stored in flash ROM13. It is a figure which shows the data before and behind the change of the merchandise master index information 122 accompanying a merchandise name change. It is a figure which shows the data before and behind the change of the flash ROM write pointer table 126 accompanying a merchandise name change. It is a figure which shows the data before and behind a part change of the 2nd goods master information 131 accompanying a goods name change. It is a figure which shows the data before and behind the change of the merchandise master index information 122 accompanying a checkout process. It is a figure which shows the data before and behind the change of the same day sales information 128 accompanying a checkout process. It is a figure which shows the data before and behind the change of the flash ROM write pointer table 126 accompanying a checkout process. It is a figure which shows the data before and behind another part of 2nd goods master information 131 accompanying a checkout process. It is a flowchart which shows the process sequence of a merchandise name change process. It is a flowchart which shows the process sequence of a payment process. It is a flowchart which shows the process sequence of goods master data read-out process. It is a flowchart which shows the process sequence of goods master data write-in process. It is a flowchart which shows the process sequence of goods master data write-in process. It is a figure for demonstrating rewriting of the merchandise master information by the merchandise name change by a prior art. It is a figure which shows the merchandise master information before and behind the change in the adjustment process by a prior art.

FIG. 1 is a block diagram showing a configuration of an electronic cash register (Electronic Cash Register: hereinafter referred to as “ECR”) 1 according to an embodiment of the present invention . The ECR 1 includes a control unit 11, a random access memory (abbreviated as “RAM”) 12, a data storage flash memory (commonly called “flash ROM (Read Only Memory)” hereinafter referred to as “flash ROM”) 13, a program A storage ROM 14, a display unit 15, a printer 16, a clock 17, a keyboard 18, a communication unit 19, an SD card interface unit 20, a barcode scanner 21 and a drawer 22 are configured.

  The control unit 11 that is a control means is configured by, for example, a central processing unit (abbreviated as “CPU”), and executes a program stored in the program storage ROM 14, whereby the RAM 12, the flash ROM 13, the display unit 15, The printer 16, clock 17, keyboard 18, communication unit 19, secure digital (abbreviated as “SD”) card interface unit 20, barcode scanner 21 and drawer 22 are controlled.

  The RAM 12 serving as the first storage means is constituted by, for example, a static RAM (hereinafter referred to as “SRAM”). The RAM 12 stores information necessary for the control unit 11 to execute a program, and information is written and read by the control unit 11. The RAM 12 stores information that causes the rewriting frequency to be greater than a predetermined reference frequency, for example, to be rewritten twice a day. The RAM 12 stores, for example, first product master information 121, display / print data 127, receipt calculation data 128, a product master information memory configuration table 125, and a flash ROM write pointer table 126. The RAM 12 has no limit on the number of rewrites.

  The first product master information 121 includes product master index information 122, unit price information 123, and same day sales information 124. The merchandise master index information 122 is information representing an index indicating an address where information on a plurality of items related to merchandise is stored. The unit price information 123 is information representing the unit price of each product. The sales information 124 on the day is information representing the sales amount of the product on a daily basis. The display / print data 127 is information to be displayed on the display unit 15 and information to be printed on the printer 16. The receipt calculation data 128 is information for creating a receipt for a sold product. The merchandise master information memory configuration table 125 is a table that indicates where and in what storage unit information of a plurality of items related to merchandise is stored in units of bytes. The flash ROM write pointer table 126 is a table that stores a write pointer that represents an unused area of each block formed in the flash ROM 13, that is, a start address of an unwritten area, that is, a start address of a writable area. The unit price information 123 and the day sales information 124 are information of the first item. The index is specific information.

  The flash ROM 13 as the second storage means is a semiconductor memory with a limited number of rewrites. The price of the flash ROM 13 is lower than the price of the RAM 12. The flash ROM 13 stores information necessary for the control unit 11 to execute a program, and information is written and read by the control unit 11. In order to rewrite the information written in the flash ROM 13, it is necessary to erase the written information and then write it.

  The flash ROM 13 stores information in which rewriting frequency is less than a predetermined reference frequency, for example, rewriting occurs less than twice a day. That is, the flash ROM 13 stores information that is updated less frequently than information stored in the RAM 12. For example, the second product master information 131 and the sales record 136 are stored in the flash ROM 13.

  The second product master information 131 includes product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135. The product name information 132 is information representing the name given to each product. The various setting information 133 is information set for each product, and includes, for example, information such as tax type and group. The tax type represents different types, such as internal / external tax and tax / non-tax. The group represents a group in which each product is classified. The weekly sales information 134 is information that represents the sales amount of a weekly product. Monthly sales information 135 is information that represents the sales amount of a monthly product. The sales record 136 is an electronic journal that electronically stores individual sales. Product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135 are information of the second item.

  The program storage ROM 14 is configured by, for example, a rewritable flash memory or a non-rewritable mask ROM. The program storage ROM 14 stores programs and tables executed by the control unit 11.

  The display unit 15 is configured by a display device such as a liquid crystal display. The display unit 15 displays information received from the control unit 11. The printer 16 is configured by a printing device, for example. The printer 16 prints information received from the control unit 11. The control unit 11 prints a receipt, for example, by the printer 16. The clock 17 measures time. The control unit 11 refers to the clock 17 to recognize the time or measure the time. The keyboard 18 is an input device having a plurality of keys for inputting characters, numbers, symbols, and the like. The keyboard 18 sends information associated with the operated key to the control unit 11. The user can input information such as a product code and a customer number by operating the keyboard 18.

  The communication unit 19 is configured by a communication device, for example. The communication unit 19 transmits / receives information to / from another device connected to the communication line, for example, a server device. The SD card interface unit 20 can be loaded with a removable recording medium, for example, an SD card, and is an interface for writing and reading information on the loaded recording medium. The SD card interface unit 20 reads the information recorded on the loaded recording medium, sends the read information to the control unit 11, and writes the information received from the control unit 11 on the loaded recording medium. Information such as a merchandise master, a customer master, and a sales record is stored in the SD card. The barcode scanner 21 reads the barcode and sends the read information to the control unit 11. The bar code scanner 21 reads, for example, a bar code of a product and a bar code of a customer number stored in a card. The drawer 22 is a storage device that stores money.

  The control unit 11 performs an update process of stored information and a transaction process according to the information input from the keyboard 18. For example, the control unit 11 performs a product name change process in the update process. Further, in the transaction process, when the product is sold, the control unit 11 performs the product sales process and updates the sales record. In the sales process, the sales amount is totaled, and the same day sales information in the first product master information 121 and the weekly sales information 134 and the monthly sales information 135 in the second product master information 131 are updated.

  The control unit 11 includes a data transmission / reception unit 111 and various data creation units 112. The data transmission / reception unit 111 and the various data creation unit 112 are functions realized by the control unit 11 executing a program stored in the program storage ROM 14. The data transmitter / receiver 111 transmits / receives information to / from a server device connected to a communication line, for example, by the communication unit 19. The various data creation unit 112 creates display data and print data. The control unit 11 causes the display unit 15 to display the display data created by the various data creation unit 112 and causes the printer 16 to print the print data created by the various data creation unit 112.

  FIG. 2 is a diagram illustrating a configuration of the product master information 30. The product master information 30 is information indicating information on a plurality of items related to products for each product code. The product master information 30 includes items of a product code 301, a product name 302, a unit price 303, various settings 304, a daily sales amount 305, a weekly sales amount 306, and a monthly sales amount 307.

  The product code 301 is identification information for identifying each product. The product code 301 is represented by a natural number. The product name 302 is a name given to each product. The unit price 303 is a price per item. The various settings 304 are information set in advance such as a tax type and a group. The current day sales amount 305 is a daily sales amount. The weekly sales amount 306 is a weekly sales amount. The monthly sales amount 307 is a monthly sales amount.

  In the product master information 30 shown in FIG. 2, a product name 302, a unit price 303, various settings 304, a daily sales amount 305, a weekly sales amount 306, and a monthly sales amount 307 are represented in units of lines for each product code. Yes. The product master information 30 shown in FIG. 2 is arranged in ascending order of product codes, but it may be in descending order.

  In FIG. 2, for the product code “00001”, the product name “Oolong tea”, the unit price “150”, various settings “local tax, first group”, sales amount “66,000 yen” on the day, weekly sales amount “330, “000 yen” and the monthly sales amount “1,500,000 yen” are shown. For product code “00002”, product name “green tea A”, unit price “150”, various settings “local tax, first group”, sales amount “75,000 yen” on the day, weekly sales amount “412,500 yen” , And the monthly sales amount “2,200,000 yen” is shown. For the product code “00003”, the product name “Green tea B”, unit price “150”, various settings “local tax, first group”, sales amount “6,000 yen” on the day, weekly sales amount “36,000 yen” The monthly sales amount “150,000 yen” is shown. For the product code “00011”, the product name “Ampan”, unit price “100”, various settings “local tax, second group”, sales amount “8,000 yen” on the day, weekly sales amount “48,000 yen”, The monthly sales amount “120,000 yen” is also shown. For the product code “00012”, the product name “sandwich”, unit price “250”, various settings “local tax, second group”, sales amount “8,750 yen” on the day, weekly sales amount “70,000 yen”, The monthly sales amount “250,000 yen” is also shown. For the product code “00101”, the product name “gift certificate A”, unit price “1000”, various settings “tax free, third group”, sales amount “12,000 yen” on the day, weekly sales amount “80,000 yen” , And the monthly sales amount “385,000 yen” is shown. For the product code “00102”, the product name “gift certificate B”, unit price “1000”, various settings “tax free, third group”, sales amount “5,000 yen” on the day, weekly sales amount “20,000 yen” The monthly sales amount “72,000 yen” is shown.

  FIG. 3 is a diagram showing a configuration of information stored in the RAM 12. The RAM 12 stores display / print data 127, receipt calculation data 128, merchandise master index information 122, unit price information 123, same-day sales information 124, a merchandise master information memory configuration table 125, and a flash ROM write pointer table 126. Yes. The product master index information 122, the unit price information 123, and the current day sales information 124 constitute the first product master information 121.

  FIG. 4 is a diagram showing a configuration of information stored in the flash ROM 13. In the flash ROM 13, 14 pieces of second product master information 131 and two pieces of sales records 136 are stored in units of blocks. The second merchandise master information 131 stored in one block is composed of 64 Kbytes, and the sales record 136 stored in one block is composed of 64 Kbytes.

  FIG. 5 is a diagram showing a configuration of information stored in the program storage ROM 14. The program storage ROM 14 stores a first application program 141, a second application program 142, a product master information update processing program 143, a flash ROM block configuration table 144, and an nth application program 145 in this order. The first application program 141, the second application program 142, and the nth application program 145 are application programs.

  The product master information update processing program 143 is a program for updating the product master information 30, and performs product name change processing and settlement processing described later. The flash ROM block configuration table 144 is a table showing start addresses and end addresses of 16 blocks formed in the flash ROM 13. The product master information update processing program 143 and the flash ROM block configuration table 144 constitute a product master update processing program.

  FIG. 6 is a diagram showing the configuration of the flash ROM block configuration table 144. For example, the start address of the first block is “0x00000” and the end address is “0x0FFFF”. The start address of the second block is “0x10000” and the end address is “0x1FFFF”. The start address of the third block is “0x20000”, and the end address is “0x2FFFF”. The start address of the fourth block is “0x30000”, and the end address is “0x3FFFF”. The start address of the 16th block is “0xF0000”, and the end address is “0xFFFFF”. Here, “0x” is a C-language description format and indicates a hexadecimal numerical value.

  FIG. 7 is a diagram showing the configuration of the product master information memory configuration table 125. It is a table which shows in which storage medium where each item of information included in the product master information 30 is stored in units of bytes.

  The memory type is information indicating a storage medium in which information of each item is stored. “RAM” indicates that the storage medium is the RAM 12, and “FlashROM” indicates that the storage medium is the flash ROM 13. The memory size (number of bytes) is information representing the length of information of each item in number of bytes. The start address / block indicates the head address where the information of each item is stored when the memory type is “RAM”, and the head address where the information of each item is stored when the memory type is “FlashROM”. Indicates the block number. The end address / block indicates the last address where the information of each item is stored when the memory type is “RAM”, and the last address / block is stored when the memory type is “FlashROM”. Indicates the block number.

  FIG. 7 shows information of six items, specifically, unit price information 123, current day sales information 124, product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135. The “memory type”, “memory size (number of bytes)”, “start address / block” and “end address / block” for the information of each item are “RAM”, “3”, “0x08000” for the unit price information 123. And “0x085DB”. The sales information 124 for the day is “RAM”, “8”, “0x085DC”, and “0x0957B”. The product name information 132 is “FlashROM”, “16”, “1”, and “2”. The various setting information 133 is “FlashROM”, “2”, “1”, and “2”. The weekly sales information 134 is “FlashROM”, “8”, “3”, and “3”. The monthly sales information 135 is “FlashROM”, “8”, “4”, and “4”.

  FIG. 8 is a diagram showing the configuration of the flash ROM write pointer table 126. The flash ROM write pointer table 126 is a table that stores the write pointer value of each block. The write pointer is a pointer indicating the head address of an unused area in the block. In FIG. 8, “0x0080” is shown as the write pointer of the first block, “0x0000” is shown as the write pointer of the second block, “0x0038” is shown as the write pointer of the third block, “0x0038” is indicated as the write pointer of the fourth block, and “0x0000” is indicated as the write pointer of the sixteenth block.

  FIG. 9 is a diagram showing the configuration of the product master index information 122. As shown in FIG. The product master index information 122 includes a record pointer and a memory address where the second product master information 131 is stored. The record pointer is a pointer that indicates the number of the record of each product code among the records of the first product master information stored in the RAM 12.

  The memory address in which the second product master information is stored indicates the addresses of the product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135 stored in the flash ROM 13 for each product code. The product master index information 122 illustrated in FIG. 9 is arranged in ascending order of product codes, but may be in descending order.

  The record pointer associated with each product code, and the addresses of the product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135 are “0x0001”, “0x00000” for the product code “00001”. ”,“ 0x00010 ”,“ 0x20000 ”, and“ 0x30000 ”. The product code “00002” is “0x0002”, “0x00012”, “0x00022”, “0x20008”, and “0x30008”. The product code “00003” is “0x0003”, “0x00024”, “0x00034”, “0x20010”, and “0x30010”. The product code “00011” is “0x0004”, “0x00036”, “0x00046”, “0x20018”, and “0x30018”. The product code “00012” is “0x0005”, “0x00048”, “0x00058”, “0x20020”, and “0x30020”. The product code “00101” is “0x0006”, “0x0005A”, “0x0006A”, “0x20028”, and “0x30028”. The product code “00102” is “0x0007”, “0x0006C”, “0x0007C”, “0x20030”, and “0x30030”.

  FIG. 10 is a diagram illustrating information stored in the record indicated by the record pointer. One record includes unit price information 123 and same day sales information 124. Same-day sales information 124 associated with one product code is stored in RAM 12 in the same order as unit price information 123 associated with the same product code.

  In each record stored in the RAM 12, a unit price 401 is stored as the unit price information 123, and a daily sales amount 402 is stored as the day sales information 124. In FIG. 10, “150” and “66000” are shown for the record pointer “0x0001” as “unit price” and “current sales amount” of the record indicated by each record pointer. For the record pointer “0x0002”, “150” and “75000” are shown. For the record pointer “0x0003”, “150” and “6000” are shown. For the record pointer “0x0004”, “100” and “8000” are shown. For the record pointer “0x0005”, “250” and “8750” are shown. For the record pointer “0x0006”, “1000” and “12000” are shown. For the record pointer “0x0007”, “1000” and “5000” are shown. In all cases, the unit is a circle.

  FIG. 11 is a diagram showing a configuration of the second product master information 131 stored in the flash ROM 13. FIG. 11 shows the address of the flash ROM 13 at the left end, information stored at the address stored at the left end at the center, and a description of the information at the right end.

  For example, in the address “0x00000”, “oolong tea” is shown in the center, and “product name information (16 characters)” is shown in the right end. This indicates that the information “Oolong tea” is stored from the address “0x00000” of the flash ROM 13, and the information is the product name information 132 and consists of 16 characters. In addition, the address “0x00010” indicates “0x00 0x01” in the central portion and “various setting information inclusive tax, first group” in the right end portion. This indicates that information “0x00 0x01” is stored from the address “0x00010” of the flash ROM 13, and the information is tax type and group setting information 133. The tax type “0x00” indicates that it is a domestic tax, and the tax type “0x02” indicates that it is not taxable. The group “0x01” indicates the first group, the group “0x02” indicates the second group, and the group “0x03” indicates the third group.

  Further, for example, in the address “0x20000”, “330000” is shown at the center, and “weekly sales information” is shown at the right end. This indicates that information “330000” is stored from the address “0x20000” of the flash ROM 13 and this information is the weekly sales information 134 representing the weekly sales amount. In the address “0x30000”, “330000” is shown at the center, and “Monthly sales information” is shown at the right end. This indicates that the information “330000” is stored from the address “0x30000” of the flash ROM 13 and the information is the monthly sales information 135 representing the monthly sales amount.

  “0xFF” is stored in the unused address. That is, hexadecimal “FF” is stored in the unused address. In the flash ROM write pointer table 126 shown in FIG. 8, “0x08080” is described as the write pointer of the first block, and it can be seen that the unused area of the first block is the address “0x08080”. It can be seen that “0x20038” is written as the write pointer of the third block, and the unused area of the third block is the address “0x20038”. Further, “0x30038” is described as the write pointer of the fourth block, and it can be seen that the unused area of the fourth block is the address “0x30038”.

  FIG. 12 is a diagram illustrating data before and after the change of the product master index information 122 accompanying the product name change. 12 to 14, the case where the product name “green tea B” of the product code “00003” is changed to “green tea B_500 ml” will be described as an example. FIG. 12A shows the product master index information 122 before the change, and FIG. 12B shows the product master index information 122a after the change.

  In the product master index information 122 shown in FIG. 12A, the address of the product name information of the product code “00003” is “0x00024”. In the product master index information 122a shown in FIG. The address of the product name information with the code “00003” is “0x08080”. That is, the product name information 132 representing the new product name “Green tea B_500 ml” after the change is stored in the area from the address “0x08080” which is an unused area of the first block. The product name information 132 indicating the product name “green tea B” before the change is not erased and is stored in the area from the address “0x00024” of the first block, but the product master shown in FIG. In the index information 122a, since the address of the product name information 132 of the product code “00003” is changed, the product name information 132 before the change is not used, and the product name information 132 after the change can be used.

  FIG. 13 is a diagram showing data before and after the change in the flash ROM write pointer table 126 associated with the change of the product name. FIG. 13A shows the flash ROM write pointer table 126 before the change, and FIG. 13B shows the flash ROM write pointer table 126a after the change.

  The product name information 132 is found to be “16” bytes by referring to the product master information memory configuration table 125 shown in FIG. The product name “Green tea B” of the product code “00003” is changed to “Green tea B_500 ml”, and the product name information 132 of the product code “00003” is an area from the address “0x08080” which is an unused area of the first block. As a result, the write pointer of the first block is changed to “0x0090” obtained by adding 16 bytes to “0x0080”. In the flash ROM write pointer table 126 before the change shown in FIG. 13A, the write pointer of the first block is “0x0080”, but the flash ROM write pointer table 126a after the change shown in FIG. Then, the write pointer of the first block is changed to “0x0090”.

  FIG. 14 is a diagram illustrating data before and after a part of the second product master information 131 associated with the product name change. A part of the second product master information 131 before the change is shown on the left side of FIG. 14, and a part of the second product master information 131a after the change is shown on the right side. In the second product master information 131 before the change, the first block address “0x08080” and later of the flash ROM 13 is unused, but in the second product master information 131a after the change, the address “1” of the first block in the flash ROM 13 is used. From 0x08080, 16-byte product name information 132 representing the product name “green tea B — 500 ml” is stored. The write pointer of the first block is updated from “0x08080” to “0x00090”. At the address “0x00024”, the product name information 132 representing the product name “green tea B” before the change is stored without being erased.

  FIG. 15 is a diagram illustrating data before and after the change of the merchandise master index information 122 accompanying the checkout process. The settlement process is executed at the end of the day, for example. Specifically, at the end of the day, issue a weekly sales report, add “Actual Sales Amount” to “Weekly Sales Amount” and “Monthly Sales Amount” respectively, and prepare “Actual Sales Amount” for the next day. Is initialized. FIG. 15A shows the product master index information 122 before the change, and FIG. 15B shows the product master index information 122b after the change.

  Product master index information 122 before change shown in FIG. 15A indicates the address of weekly sales information and the address of monthly sales information before the settlement process is executed. The addresses of the weekly sales information and the monthly sales information shown in FIG. 15A are stored in the flash ROM 13 in which the weekly sales information 134 and the monthly sales information 135 of the second product master information 131 shown in FIG. Address.

  The addresses of the weekly sales information and the monthly sales information shown in FIG. 15B are addresses of the flash ROM 13 in which the weekly sales information 134 and the monthly sales information 135 after the settlement process are stored. Weekly sales information 134 after the settlement process is stored in an unused area of the second block of the flash ROM 13, and monthly sales information 135 after the settlement process is stored in an unused area of the third block of the flash ROM 13.

  Specifically, the weekly sales information 134 and the monthly sales information 135 before the settlement process are stored at addresses “0x20000” and “0x30000” for the product code “00001”, respectively. The product code “00002” is stored at addresses “0x20008” and “0x30008”. The product code “00003” is stored at addresses “0x20010” and “0x30010”. The product code “00011” is stored at addresses “0x20018” and “0x30018”. The product code “00012” is stored at addresses “0x20020” and “0x30020”. The product code “00101” is stored at addresses “0x20028” and “0x30028”. The product code “00102” is stored at addresses “0x20030” and “0x30030”.

  The weekly sales information 134 and the monthly sales information 135 after the settlement process are stored at addresses “0x20038” and “0x30038” for the product code “00001”, respectively. The product code “00002” is stored at addresses “0x20040” and “0x30040”. The product code “00003” is stored at addresses “0x20048” and “0x30048”. The product code “00011” is stored at addresses “0x20050” and “0x30050”. The product code “00012” is stored at addresses “0x20058” and “0x30058”. The product code “00101” is stored at addresses “0x20060” and “0x30060”. The product code “00102” is stored at addresses “0x20068” and “0x30068”.

  FIG. 16 is a diagram showing data before and after the change of the sales amount 402 on the day accompanying the checkout process. FIG. 16A shows the same day sales amount 402 before the change, and FIG. 16B shows the same day sales amount 402a after the change. That is, the current day sales amount 402 before the change shown in FIG. 16A is the same day sales amount before the settlement process, and is stored in the record indicated by each record pointer. The changed-day sales amount 402a shown in FIG. 16B is the same-day sales amount after the settlement process, and is stored in the record indicated by each record pointer.

  FIG. 16A shows the sales amount 402 on the day stored in the record indicated by each record pointer. The record pointer “0x0001” is “66000”. The record pointer “0x0002” is “75000”. The record pointer “0x0003” is “6000”. The record pointer “0x0004” is “8000”. The record pointer “0x0005” is “8750”. The record pointer “0x0006” is “12000”. The record pointer “0x0007” is “5000”.

  FIG. 16B shows the current day sales amount 402a stored in the record indicated by each record pointer. “0” is stored in any of the record pointers “0x0001” to “0x0007”. That is, since the settlement process for one day is completed, all the sales amounts 402a on the day are initialized to “0” in preparation for the process on and after the next day.

  FIG. 17 is a diagram showing data before and after the change of the flash ROM write pointer table 126 accompanying the settlement process. FIG. 17A shows the flash ROM write pointer table 126 before the change, and FIG. 17B shows the flash ROM write pointer table 126b after the change.

  The weekly sales information 134 and the monthly sales information 135 are both “8” bytes when referring to the product master information memory configuration table 125 shown in FIG. The weekly sales information 134 after the settlement process is stored from the start address of the unused area of the third block, that is, the address indicated by the write pointer of the third block of the flash ROM write pointer table 126 shown in FIG. . The monthly sales information 135 after the settlement process is stored from the start address of the unused area of the fourth block, that is, the address indicated by the write pointer of the fourth block in the flash ROM write pointer table 126 shown in FIG. .

  Since the checkout process was performed for seven product codes, the write pointer of the third block after the checkout process is changed to the write pointer “0x0038” of the third block of the flash ROM write pointer table 126 shown in FIG. 56 bytes are added to become the write pointer “0x0070” of the third block of the flash ROM write pointer table 126 shown in FIG. Similarly, the write pointer of the fourth block after the settlement process adds 56 bytes to the write pointer “0x0038” of the fourth block in the flash ROM write pointer table 126 shown in FIG. The write pointer “0x0070” of the fourth block of the flash ROM write pointer table 126 shown in FIG.

  FIG. 18 is a diagram illustrating data before and after another part of the second merchandise master information 131 accompanying the checkout process. The other part of the second product master information 131 before the change is shown on the left side of FIG. 18, and the other part of the second product master information 131b after the change is shown on the right side.

  In the second merchandise master information 131 before the change, the third block address “0x20038” and later of the flash ROM 13 is unused, but in the second merchandise master information 131b after the change, the address “3” of the third block in the flash ROM 13 is used. From 0x20038, weekly sales information 134 for seven product codes “00001” to “00007” is stored. The write pointer of the third block is updated from “0x20038” to “0x20070”.

  At the address “0x20038”, the weekly sales amount “396000” of the product code “00001” is stored as the weekly sales information 134. At the address “0x20040”, the weekly sales amount “487500” of the product code “00002” is stored as the weekly sales information 134. At the address “0x20048”, the weekly sales amount “52000” of the product code “00003” is stored as the weekly sales information 134. At the address “0x20050”, the weekly sales amount “56000” of the product code “00011” is stored as the weekly sales information 134. At the address “0x20058”, the weekly sales amount “78750” of the product code “00012” is stored as the weekly sales information 134. At the address “0x20060”, the weekly sales amount “92000” of the product code “00101” is stored as the weekly sales information 134. At the address “0x20068”, the weekly sales amount “25000” of the product code “00102” is stored as the weekly sales information 134.

  Similarly, in the second merchandise master information 131 before the change, the address “0x30038” and later of the fourth block of the flash ROM 13 is unused, but in the second merchandise master information 131b after the change, the fourth block of the flash ROM 13 is used. Monthly sales information 135 for seven product codes “00001” to “00007” is stored from the address “0x30038”. The write pointer of the fourth block is updated from “0x30038” to “0x30070”.

  The monthly sales amount “1566000” of the product code “00001” is stored as the monthly sales information 135 at the address “0x30038”. The monthly sales amount “2275000” of the product code “00002” is stored as the monthly sales information 135 at the address “0x30040”. At the address “0x30048”, the monthly sales amount “156000” of the product code “00003” is stored as the monthly sales information 135. The monthly sales amount “128000” of the product code “00011” is stored as the monthly sales information 135 at the address “0x30050”. The monthly sales amount “258750” of the product code “00012” is stored as the monthly sales information 135 at the address “0x30058”. At the address “0x30060”, the monthly sales amount “397000” of the product code “00101” is stored as the monthly sales information 135. At the address “0x30068”, the monthly sales amount “77000” of the product code “00102” is stored as the monthly sales information 135.

  FIG. 19 is a flowchart showing the processing procedure of the product name change process. The product name change process is a process for changing a product name that has already been named. For example, when the user selects a product name change function from the main menu using the keyboard 18, the process proceeds to step A1.

  In step A <b> 1, when the user inputs a product code and a product name using the keyboard 18, the keyboard 18 sends information indicated by the operated key to the control unit 11. The control unit 11 receives input information, that is, information representing a product code and a product name from the keyboard 18.

  In step A2, the control unit 11 assigns “product name” to a target item variable (referred to as “[item]” in the figure) representing an item to be written and writes a write content variable (in the figure, “[item]”). The product name input in step A1 is substituted into [written content]. In step A3, the control unit 11 writes product master information (hereinafter referred to as “product master data”) for the input product code, and ends the product name change process. The product master data is the first product master information 121 and the second product master information 131. The product master data writing process will be described later with reference to FIGS.

  FIG. 20 is a flowchart showing the processing procedure of the settlement process. The checkout process is a process for clearing sold products. For example, when the user selects the checkout function from the main menu using the keyboard 18, the process proceeds to step B1.

  In step B1, the control unit 11 assigns “1” to the index variable “indexNo.”. The index variable “indexNo.” Is a variable indicating which product code among the product codes of the product master index information 122. Specifically, the index variable “indexNo.” Indicates the number from the top of the product code of the product master index information 122 illustrated in FIG.

  In step B2, the control unit 11 acquires index data for the index variable “indexNo.” From the product master index information 122 (hereinafter referred to as “product master index”). The index data is information of the product master index information 122 shown in FIG. The control unit 11 acquires information on one line of the product code indicated by the index variable “indexNo.” As one record. When there is no product code at the position indicated by the index variable “indexNo.”, The product code is set to “0”.

  In step B3, the control unit 11 substitutes the product code stored in the acquired record into a product code variable (referred to as “(product code)” in the figure). In step B4, the control unit 11 determines whether there is no product code. That is, it is determined whether or not the record is finished. When the product code variable is “0”, the control unit 11 determines that there is no product code, and ends the settlement process. When the product code variable is not “0”, it is determined that there is a product code, and the process proceeds to step B5.

  In step B5, the control unit 11 assigns “current day sales information” to the target item variable to be read. In step B6, the control unit 11 executes a process of reading product master data for the product code indicated by the product code variable. The merchandise master data read process will be described later with reference to FIG. In step B6, the control unit 11 assigns the read data to a sales amount variable on the day (referred to as “(sales amount on the day)” in the figure) ”.

  In step B8, the control unit 11 assigns “weekly sales information” to the target item variable to be read. In step B9, the control unit 11 executes a process of reading product master data for the product code indicated by the product code variable. In step B10, the control unit 11 assigns the read data to a weekly sales amount variable (referred to as “(weekly sales amount)” in the figure). In step B11, the control unit 11 assigns a value obtained by adding the current day sales amount indicated by the current day sales amount variable to the weekly sales amount indicated by the weekly sales amount variable to the new weekly sales amount variable, thereby creating a new weekly sales amount variable. And

  In step B12, the control unit 11 assigns “monthly sales information” to the target item variable to be read. In step B13, the control unit 11 executes a process of reading product master data for the product code indicated by the product code variable. In step B14, the control unit 11 substitutes the read data into a monthly sales amount variable (referred to as “(monthly sales amount)” in the figure). In step B15, the control unit 11 assigns a value obtained by adding the current day sales amount indicated by the current day sales amount variable to the monthly sales amount indicated by the monthly sales amount variable to the new monthly sales amount variable. And

  In step B16, the control unit 11 substitutes “weekly sales information” for the target item variable to be written, and substitutes the value of the weekly sales amount variable for the written content variable. In step B <b> 17, the control unit 11 executes a product master data writing process for the product code indicated by the product code variable. In step B18, the control unit 11 substitutes “monthly sales information” for the target item variable to be written, and substitutes the value of the monthly sales amount variable for the written content variable. In step B19, the control unit 11 executes a process for writing product master data for the product code indicated by the product code variable. In step B20, the control unit 11 substitutes “current sales information” for the target item variable to be written, and substitutes a value of “0” for the write content variable. In step B <b> 21, the control unit 11 performs a product master data writing process for the product code indicated by the product code variable. In Step B22, the control unit 11 adds “1” to the index variable “indexNo.”, And returns to Step B2 as a new index variable “indexNo.”.

  FIG. 21 is a flowchart showing the processing procedure of the merchandise master data reading process. The product master data reading process is a process of reading product master data for the product code indicated by the product code variable for the item indicated by the target item variable. When Steps B6, B9, and B13 shown in FIG. 20 are executed, the process proceeds to Step C1.

  In step C1, the control unit 11 acquires index data for the product code indicated by the product code variable from the product master index. In Step C2, the control unit 11 acquires the memory size of the item indicated by the designated target item variable from the product master information memory configuration table 125. In Step C3, the control unit 11 acquires the memory type of the item indicated by the designated target item variable from the product master information memory configuration table 125.

  In step C4, the control unit 11 determines whether or not the memory type is FlashROM. When the memory type is FlashROM, the control unit 11 proceeds to Step C5. When the memory type is not FlashROM, that is, when the memory type is RAM, the control unit 11 proceeds to Step C7. In step C5, the control unit 11 acquires the memory address of the item indicated by the designated target item variable from the index data. In step C6, the control unit 11 acquires data corresponding to the memory size from the acquired memory address, and passes the acquired data to the upper application (referred to as “upper application” in the figure), that is, the checkout process shown in FIG. Then, the merchandise master data reading process is terminated.

  In Step C7, the control unit 11 acquires the start address of the item indicated by the designated target item variable from the product master information memory configuration table 125. In step C8, the control unit 11 acquires a record pointer from the index data. In step C9, the control unit 11 calculates a memory address storing the target data from the start address acquired in step C7, the record pointer acquired in step C8, and the memory size acquired in step C2. The target data is information on the item indicated by the target item variable. In step C10, the control unit 11 acquires data corresponding to the memory size from the calculated memory address, passes the acquired data to the upper application, that is, the checkout process shown in FIG. 20, and ends the merchandise master data reading process.

  22 and 23 are flowcharts showing the processing procedure of the merchandise master data writing process. The product master data writing process is a process of writing the content to be written indicated by the write content variable into the product master data for the product code indicated by the product code variable for the item indicated by the target item variable. When Step B3 shown in FIG. 19 or Steps B17, B19, and B21 shown in FIG. 20 are executed, the process proceeds to Step D1.

  The processes in steps D1 to D7 are the same as those in steps C1 to C4 and C7 to C9 shown in FIG. 21, and a description thereof will be omitted to avoid duplication. In step D8, the control unit 11 writes and records the content to be written indicated by the designated write content variable in the area corresponding to the memory size from the calculated memory address, and ends the product master data writing process.

  In step D11, the control unit 11 obtains the start block number and end block number of the item indicated by the designated target item variable from the product master information memory configuration table 125. In step D12, the control unit 11 substitutes the number of the start block acquired in step D11 into a block number variable (referred to as “(block number)” in the figure) representing the block number.

  In step D13, the control unit 11 acquires a write pointer corresponding to the block number indicated by the block number variable from the flash ROM write pointer table 126. In step D14, the control unit 11 determines whether or not the value of the write pointer is “0xFFFF”. When the value of the write pointer is “0xFFFF”, the control unit 11 proceeds to step D21, and when the value of the write pointer is not “0xFFFF”, the control unit 11 proceeds to step D15.

  In step D15, the control unit 11 acquires a start address corresponding to the block number indicated by the block number variable from the flash ROM block configuration table 144. In step D16, the control unit 11 refers to the address obtained by adding the value of the write pointer acquired in step D13 to the start address acquired in step D15, and is referred to as a write address variable (“(write address)” in the drawing). ). In step D17, the control unit 11 writes the content to be written indicated by the designated write content variable from the calculated write address, that is, the write address indicated by the write address variable, into the area corresponding to the memory size acquired in step D2. Record.

  In step D18, the control unit 11 writes and records the write address indicated by the write address variable in the memory address of the item indicated by the target item variable among the items corresponding to the product code indicated by the product code variable of the product master index. In step D19, the control unit 11 substitutes a value obtained by adding the memory size acquired in step D2 to the value indicated by the write pointer acquired in step D13 for the write pointer variable. In step D20, the control unit 11 writes and records the write pointer indicated by the write pointer variable in the write pointer of the block number indicated by the block number variable among the block numbers of the flash ROM write pointer table 126, and records the product master data document. Finish the process.

  In step D21, the control unit 11 adds “1” to the block number indicated by the block number variable, and substitutes the block number obtained by adding “1” into the block number variable as a new block number. In step D22, the control unit 11 determines whether or not the block number indicated by the block number variable is an end block. When the block number indicated by the block number variable is the end block, the control unit 11 proceeds to step D23, and when the block number indicated by the block number variable is not the end block, the control unit 11 returns to step D13. The end block is, for example, the 16th block.

  In step D23, the control part 11 performs a garbage process and returns to step D11. Garbage processing is processing for organizing blocks stored in the flash ROM. Specifically, the garbage process is a process of erasing unused information stored without being erased when information is updated, and is performed using a conventional technique.

  FIG. 24 is a diagram for explaining rewriting of product master information when a product name is changed according to a conventional technique. In the prior art, the merchandise master information 30 shown in FIG. 2 is stored in the flash ROM 13. FIG. 24A shows product master index information 91 indicating a record pointer for each product code. FIG. 24B shows product master information 92 stored in the flash ROM 13 in which the product name “green tea B” of the product code “00003” is updated to the product name “green tea B_500 ml”.

  In the prior art, after the product name “green tea B” stored at the product name address of the product code “00003” is deleted, the product name “green tea B_500 ml” is written at the same address. That is, erasure occurs every time the product name is updated. On the other hand, in the present invention, as shown in FIG. 14, the changed product name “green tea B_500 ml” is written in the unused area, so that the product name “green tea B” before the change is deleted. It remains memorized.

  FIG. 25 is a diagram illustrating the product master information before and after the change in the checkout process according to the conventional technique. In the prior art, the merchandise master information 30 shown in FIG. 2 is stored in the flash ROM 13. FIG. 25A shows the product master information 93 stored in the flash ROM 13 before the change. FIG. 25B shows the product master information 94 stored in the flash ROM 13 after the change.

  In the prior art, when the settlement process is performed, the sales amount on the day for all the product codes stored in the flash ROM is set to “0”, and the weekly sales amount and the monthly amount for all the product codes stored in the flash ROM. The sales amount is updated by adding the sales amount on the day. In this case, the sales amount on the day, the weekly sales amount, and the monthly sales amount for all the product codes before the change stored in the flash ROM are once deleted and updated. That is, erasure occurs every time the settlement process is performed. On the other hand, in the present invention, the daily sales amount stored in the RAM 12 is updated as shown in FIG. 16, and the weekly sales amount and the monthly sales amount after the settlement process are updated as shown in FIG. Stored in an unused area. Accordingly, the weekly sales amount and the monthly sales amount before the change can be stored without being deleted.

  As described above, in the present invention, the information before change stored in the flash ROM 13 is stored without being erased, and the information stored without being erased is written to all the blocks. Since the data is erased by the garbage process, the frequency of erasing the flash ROM 13 can be reduced, and the life of the flash ROM 13 can be extended.

  Thus, the RAM 12 has no limit on the number of rewrites. The flash ROM 13 is limited in the number of rewrites. And the control part 11 memorize | stores in RAM12 the information of the 1st item in which the rewriting frequency is more than the reference frequency defined beforehand among information about a plurality of items about goods, for example, unit price information 123, and sales information 124 on the day, Information on the second item whose rewrite frequency is less than a predetermined reference frequency, such as product name information 132, various setting information 133, weekly sales information 134, and monthly sales information 135, is stored in the flash ROM 13. Therefore, the usage amount of the RAM 12, for example, an expensive SRAM can be reduced, and the cost can be reduced. In addition, since information with a low rewrite frequency is stored in the flash ROM 13 with a limited number of rewrites, the usable period of the flash ROM 13 can be extended.

  Further, the RAM 12 stores a product code 301 for identifying each product. Then, the control unit 11 stores information on the first item in the RAM 12 in association with the product code 301, and stores information on the second item in the flash ROM 13 in association with the product code 301. Therefore, information on a plurality of items can be managed for each product code 301.

  Further, the control unit 11 stores an index for specifying the address of the flash ROM 13 in which the information of the second item is stored in the RAM 12 in association with the product code 301. Therefore, the information of the second item stored in the flash ROM 13 can be specified by the index stored in the RAM 12.

  Further, when updating the information of the second item stored in the flash ROM 13, the control unit 11 flashes the information of the second item after the change without deleting the information of the second item before the change. The index is stored in the unwritten area of the ROM 13 and the index stored in the RAM 12 is rewritten with an index for specifying the address where the information of the second item after the change is written. Therefore, even if the information of the second item is updated, it is not necessary to erase the flash ROM 13 and the usable period of the flash ROM 13 can be further extended.

  Further, the product code 301 is represented by a natural number. Then, the control unit 11 associates the information of the first item with the product code 301 and stores the information in the ascending or descending order of the product code 301 in the RAM 12, and associates the information of the second item with the product code 301. The data are stored in the flash ROM 13 in ascending or descending order of 301. Therefore, the search by the product code 301 can be easily performed.

1 ECR
11 Control unit 12 RAM
13 Flash ROM
14 Program storage ROM
DESCRIPTION OF SYMBOLS 15 Display part 16 Printer 17 Clock 18 Keyboard 19 Communication part 20 SD card interface part 21 Barcode scanner 22 Drawer 111 Data transmission / reception 112 Various data creation 121 1st product master information 122 Commodity master index information 123 Unit price information 124 Sales information 125 on the day 125 Display / Printing data 126 Receipt calculation data 127 Product master information memory configuration table 128 Flash ROM write pointer table 131 Second product master information 132 Product name information 133 Various setting information 134 Weekly sales information 135 Monthly sales information 136 Sales record

Claims (5)

A first storage means having no limit on the number of rewrites;
A second storage means with a limited number of rewrites;
Of the information about the plurality of items related to the product, the first item information whose rewrite frequency is equal to or higher than a predetermined reference frequency is stored in the first storage means, and the second rewrite frequency is less than the predetermined reference frequency Control means for associating the item information with the first item information and storing it in the second storage means, wherein the first item information and the second item information corresponding to each other are An electronic cash register characterized by comprising: a storage means and a control means for performing transaction processing based on the first item information and the second item information read from the storage means and the second storage means . The first storage means stores identification information for identifying each product,
The control means stores information on the first item in the first storage means in association with the identification information, and stores information on the second item in the second storage means in association with the identification information. The electronic cash register according to claim 1, wherein the electronic cash register is stored. The control means stores, in the first storage means, specific information for specifying an address of a second storage means in which information of a second item is stored, in association with the identification information. Item 3. An electronic cash register according to Item 2. When the control unit updates the information of the second item stored in the second storage unit, the control unit stores the information of the second item after the change without deleting the information of the second item before the change. Write in the unwritten area of the second storage means, and rewrite the specific information stored in the first storage means with the specific information specifying the address where the changed second item information is written. The electronic cash register according to claim 3. The identification information is represented by a natural number,
The control means associates the information of the first item with the identification information and stores it in the first storage means in ascending or descending order of the identification information, and associates the information of the second item with the identification information. The electronic cash register according to any one of claims 2 to 4, wherein the identification information is stored in a second storage means in ascending or descending order.

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