JPH0417558B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an electronic cash register configured to register monetary registration information related to product sales in a non-volatile memory.

(b) Conventional technology Conventionally, in electronic cash registers,
For example, as shown in Japanese Patent Application Laid-open No. 52-42341,
As daily product sales information, the total sales amount and total sales quantity are classified by department or transaction and stored in the memory, and the memory is cleared after the contents of the memory are printed by the checkout operation. There is. Random access memory (RAM) is generally used for this purpose, but because RAM can be electrically written and erased, it is susceptible to power outages, failures, static electricity, maintenance and repair, etc. It has been difficult to permanently store data in RAM because stored data can be destroyed due to such factors.

On the other hand, some users have expressed a desire to memorize at least daily sales totals individually and read and use them, for example, when filing tax returns once a year, but with RAM, data protection is ensured. There was a problem that it wasn't.

(C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned problems, and it is possible to write financial registration information sequentially into a non-erasable non-volatile memory and to reliably protect the stored data. The purpose of the present invention is to provide an electronic cash register that can be used as an electronic cash register.

(d) Means for Solving the Problems The present invention provides a non-volatile memory that cannot be erased, and the memory is connected to an area in which the total sales amount data for one day is continuously stored. Consisting of a partition specification data storage area in which partition specification data indicating the division of data is stored as a pair with storage address data of the data, the data is stored continuously based on the address data corresponding to the input of the partition specification data. The readout range is set, and the corresponding data is readable.

(E) Effect Since the present invention is constructed as described above, the storage data is completely protected, and by managing the data using the partition designation data and the memory address data, the data stored continuously can be protected. A desired data reading range can be easily set, and for example, data for each designated year can be easily read.

(f) Examples Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the circuit configuration of the electronic cash register of the present invention, in which 1 is a central processing unit (CPU) constituting a control circuit, an arithmetic circuit,
Built-in instruction decoder, I/O controller, memory control circuit, etc., keyboard 2
Based on each key operation signal, various calculation processes are performed and each part is controlled. Reference numeral 3 denotes a read-only memory (ROM) connected to the CPU 1 via an address bus 4 and a data bus 5, which controls the cash registering means, memory control, and output control performed by the CPU 1 based on each key operation signal of the keyboard 2. Instruction programs such as the following are stored in advance. 6 via address bus 4 and data bus 5
The RAM connected to CPU 1 stores the data processed by CPU 1, and stores it at the time of payment or inspection.
Read by CPU1. 7 is keyboard 2
This is a display device that displays data input by the CPU 1 or data processed by the CPU 1. Reference numeral 8 denotes a printer for printing on receipts and journal paper, and is controlled by the CPU 1. 9 is
Write or read specific data into the nonvolatile memory 10 under the control of the CPU 1
I am a PROM writer. Non-volatile memory 10 is comprised of a well-known programmable read only memory (PROM). Once data is written to PROM, it cannot be erased, and its memory can be preserved semi-permanently even if it is electrically disconnected.
11, 12, and 13 are connected to the address bus 4 and the data bus 5, and are connected to the keyboard 2, the display 7, and the
This is a drive circuit that drives the printer 8.

Figure 2 is a diagram showing the key layout of keyboard 2.
Reference numeral 14 denotes a mode control lock, which responds to the insertion and rotation of a predetermined key (not shown) to select "OFF", cash registration "REG", inspection "X", payment "Z", and setting "P".
Each mode is selected. The keyboard 2 is also provided with a numeric keypad 15 for entering numbers, a department key 16, and a transaction key 17.
Cash key “CASH” 17a, subtotal key “ST” 1
7b, an exchange key "#/NS" 17c, a multiplication key "X" 17d, an ELR key "ELR" 17e, a correction key "VOID" 17f, etc. are arranged.

FIG. 3 is a diagram showing a specific circuit configuration of the PROM writer 9 and the nonvolatile memory 10. The PROM writer 9 is connected to the address bus 4 and data bus 5 by a connector 18, and is It is connected to non-volatile memory 10. 20 and 21 are “A1” of address bus 4.
1, A12, A13, A15" is connected to the decoder, and its output line ",
CKD,...'' are connected to five latch circuits 22-26. Data signal lines "D ₀ to D ₇ " of the data bus 5 are connected to the latch circuits 22 to 26, while the latch circuits 2
The output lines 2 to 26 are connected to the nonvolatile memory 10 via the connector 19, and are further connected to the latch circuit 2.
The output lines 5 and 26 are connected to the nonvolatile memory 10 via gate circuits 27 to 29. The nonvolatile memory 10 is connected to three PROMIC chips 30 and 3.
Each PROM has a storage capacity of 65536 bits, and the total storage capacity is 196608 bits.

The decoder 20 is selectively activated by a control signal () from the CPU 1, and the address signal lines A11, A12, A1 of the address bus 4
3, A15)
A decode output ( ) is generated based on the selection data for selecting the decoded output ( ), which is supplied to the latch circuit 23 and each chip 30 to 32 of the nonvolatile memory 10 . On the other hand, the decoder 21 is selectively activated by the control signal () from the CPU 1, and the address signal lines A11, A12 of the address bus 4,
Latch circuit 2 input via A13 and A15
Depending on the selection data that selects 2, 24, 25, 26, the decode output (,,,
CKP) and latch circuits 22, 24, 25,
26. As a result, latch circuit 2
When the decode output ( ) is being input to the CPU 2, 8-bit write data to the nonvolatile memory 10 transferred from the CPU 1 via the data bus 5 is latched. When the decode output () is input to the latch circuit 23, 8-bit read data read from the nonvolatile memory 10 is latched. This read data is
The data is transferred to the CPU 1 via the data bus 5. When the decode output () is input to the latch circuit 24, the lower address data of the nonvolatile memory 10 transferred via the data bus 5 is latched. When the decode output () is input to the latch circuit 25, the upper address data of the non-volatile memory 10 and the chip select data of the non-volatile memory 10 transferred via the data bus 5 are latched. When the decode output () is input to the latch circuit 26, the control data for writing to the nonvolatile memory 10 transferred via the data bus 5 is latched, and the control data for writing to each chip of the nonvolatile memory 10 is latched. Write command signals (1, 2, 3), control command signals to the variable voltage generation circuit 33 (VPE,
A control command signal ( ) for outputting PWOW and 8-bit write data of the latch circuit 22 to the nonvolatile memory 10 is generated.

FIG. 4 is a diagram showing the memory arrangement of the non-volatile memory 10. 10A is an area where money registration data is continuously stored. 80 bits of data is written for each piece of information, and 2428 pieces of data can be stored, resulting in 194240 bits. is assigned. Further, 10B is an area where the classification designation data of the write data and the address data of the area 10A are stored as a pair, and 32 bits of data are written for each designation, and 1280 bits are allocated so that 40 designations can be stored.

Next, the operation of the present invention having such a configuration will be explained based on a flowchart.

First, to explain how to specify the classification, turn the mode control lock 14 to the setting "P" mode, enter the operator's unique identification code number with the numeric keypad 15 of the keyboard 2, and then press the CASH key 1.
Operate 7a. CASH key signal detected
The CPU 1 determines in step 501 whether or not the mode is set to "P", and then in step 502
It is determined whether the CASH key 17a has been operated for the first time or the second time, that is, it is determined whether the second time flag is set. This is the first time the CASH key 17a has been operated, and the CPU 1 proceeds to step 503 to determine whether the input identification code number is a pre-registered identification code number, and if it is incorrect, an error is issued. is generated, and if it is correct, the process proceeds to step 504, where the CPU 1 sequentially starts searching from the beginning of the section designation area 10B of the nonvolatile memory 10 via the PROM writer 9, and reads out the latest section designation number. Next, the CPU 1 proceeds to step 505 and determines whether or not the entire section designation area 10B has been specified. If it has been specified, an error is detected, and if there is an empty area, the latest section designation number read out at step 506 is returned. is displayed, and in step 507 a flag indicating that the CASH key 17a has been operated is set for the second time, and then in step 508 the process returns to the state of accepting the next key. Then enter the 4-digit classification data and press CASH 1 again.
When you operate 7a, the CASH key signal is captured.
The CPU 1 performs steps 501 and 501 in the same manner as described above.
At step 502, it is determined whether or not the second flag has been set, but at step 507, the second flag has already been set.
The time flag has been set, and the CPU 1 proceeds to step 509 and temporarily stores the input four-digit classification designation data. Then, in step 510, the partition designation area 10B of the non-volatile memory 10 is searched sequentially from the beginning, and the address of the latest empty area is read and stored, and the 4-digit partition designation data input in step 511 is already It is determined whether or not it has been specified, and if it has been specified, it is determined as an error, and if it has not been specified, in step 512, the area 10A of the non-volatile memory 10 where the money registration data is stored is determined.
is searched, and the address of the latest empty area is read and stored. Next, in step 513, the CPU 1 writes the input partition designation data and the latest empty area address data of the area 10A to the latest empty address of the partition designation area 10B. Next, the money registration data area of RAM 6 is cleared and the setting work is completed.

Therefore, for example, as shown in FIG. 4, data up to 1984 is input to area 10A of nonvolatile memory 10, and "designation 4" in classification designation area 10B is input.
If you want to specify the data for 1985, enter "1985" from the numeric keypad 15.
When the CASH key 17a is operated, the CPU 1 proceeds to step 509, stores the data of "1985", and then searches the section designation area 10B of the non-volatile memory 10, and searches for the latest empty area address, that is, the area of "designation 5". Read and store. Further, the CPU 1 searches the area 10A of the non-volatile memory 10, reads and stores the latest empty area at the address, that is, the address of the area 10A' indicated by diagonal lines. Next, in step 513, the latest empty area of the classification designation area 10B, ie, "designation 5", is transferred to the area 10B', and the input identification code number "1985" is added to the area 10B'.
and the latest empty area of area 10A, that is, area 10
The address data of A′ is also stored. This results in
The fact that the data for 1985 was stored from the area 10'A means that it is stored in the designated area 10B'. These controls are shown in Figure 3.
This is done via the PROM writer 9.

After specifying the category in this way, set the mode control lock 14 to the cash register "REG" position and perform the registration operation. Sales data is registered in the RAM 6 by segmentation. After completing the registration work for the day, set the mode control lock 14 to the checkout "Z" position and perform the checkout operation, as shown in Figure 6.
In step 601, the CPU 1 sequentially reads out the data stored in the RAM 6 and supplies it to the printer 8 to print a settlement report. At this time, when the total sales amount for the day is printed, the CPU 1 simultaneously controls the PROM writer 9 in step 605 to store the total sales amount data in the latest free area of the cash registration data area 10A of the non-volatile memory 10. . Then, when the payment report finishes printing, the CPU
1 clears the registered data in the ROM 6 in step 607 and ends the payment operation. In this way, the daily total sales amount data is sequentially stored in the nonvolatile memory 10.

Next, the operation of reading data stored in the nonvolatile memory 10 will be explained based on the flowchart of FIG.

First, switch the mode control lock 14 to the setting "P" position, input the classification designation number, and operate the #/NS key 17c. When the CPU 1 detects the #/NS key signal, it switches to the setting "P" mode in step 701. A determination is made as to whether the
After temporarily storing the category designation number entered in step 2,
The classification designation area 10B of the non-volatile memory 10 is searched sequentially from the beginning, and it is determined whether the classification designation number inputted in step 704 has already been designated. If it has not been designated, an error will be determined; If so, the address data stored in the partition designation area 10B is read out and temporarily stored as the read start address in step 706. Next step 7
07, the partition designation area 10B of the non-volatile memory 10
is searched again, and it is detected whether the next classification designation number after the first classification designation number read out has been specified, and if it has been designated, it is searched again from the classification command area 10B where that designation number is stored. The address data stored there is read out and temporarily stored as the read end address in step 709. On the other hand, if the next category designation number has not been specified, the process proceeds to step 710, searches the cash registration data area 10A of the nonvolatile memory 10, finds the address of the area where the cash registration data was last written, This is read out and temporarily stored as the end address. As a result, in step 711, the CPU 1 sequentially reads out the cash registration data area 10A of the nonvolatile memory 10 from the start address read earlier, and sequentially stores the data in the printer 8 until reaching the temporarily stored end address. When the end address is reached, the read operation of the nonvolatile memory 10 ends.

Therefore, if you try to read data registered in 1985, for example, if you key in "1985" and then operate the #/NS key 17c, the data will start from the category specification area 10B where "1985" is stored. The address is read, and the stored data is read out from the corresponding area of the money registration data write area 10A of the nonvolatile memory 10 and sequentially printed. This allows you to print and check the daily total sales data for 1985. In this way, the stored data for the year for which output is desired can be read from the nonvolatile memory.

In the above explanation, an example was shown in which the classification is specified on an annual basis, but it is also possible to specify a more detailed classification, such as on a quarterly basis. Further, the capacity of the nonvolatile memory is not limited to that of the embodiment, and may be appropriately set according to the amount of information to be stored.

(G) Effects of the Invention As described above, the electronic cash register of the present invention continuously stores daily total sales amount data in a non-volatile memory, and also stores category designation data indicating divisions, such as by year. It is structured so that the corresponding data is stored as a pair with the stored address data, and when reading, the reading range of the memory is set based on the corresponding address data by inputting classification designation data, and the desired data is read out in a short time. Data protection is ensured, and desired data can be read easily, which improves usability and has extremely practical effects, such as being able to use it as data when filing tax returns. .

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the electronic cash register of the present invention, Fig. 2 is a plan view showing the arrangement of the keyboard shown in Fig. 1, and Fig. 3 is a block diagram showing the configuration of the main parts of Fig. 1. , FIG. 4 is a schematic diagram showing the configuration of the nonvolatile memory in FIG. 1, FIG. 5, FIG. 6,
FIG. 7 is a flowchart showing the operating state of FIG. 1. 1... CPU, 2... Keyboard, 3...
ROM, 6... RAM, 7... Display, 8... Printer, 9... PROM writer, 10... Non-volatile memory.

Claims (1)

[Claims] 1. A keyboard for inputting money registration data, classification designation data, etc., a central processing unit for executing predetermined calculations or control in response to key signals from the keyboard, a non-volatile memory, and a a memory control device for controlling writing or reading of predetermined data in a predetermined area of the nonvolatile memory; It consists of an area where classification designation data entered from the keyboard for appropriately classifying cash registration data and address data where the corresponding cash registration data is stored are stored as a pair,
When reading the stored data, the central processing unit sets the address data stored as a pair with the stored partition designation data as a read start address upon input of the partition designation data, and the next partition designation data is stored. If so, the address data stored in pairs is set as the end address, or if the next category designation data is not stored, the address where the final cash registration data is stored is set as the end address, An electronic cash register characterized in that it is configured to read and output money registration data from a set start address to an end address.