JPS6236573B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a key-controlled electronic device equipped with 100 million, 10,000, 1,000, etc. keys (hereinafter referred to as unit designation keys). More specifically, the present invention is a key-controlled electronic device that is equipped with a numerical key and a unit designation key that indicates a scale such as 100 million, 10,000, 1,000, etc., and has a display register into which numerical information to be displayed is input. It performs the following operations. That is, by operating the numerical keys before operating the unit designation key, numerical information is input from the lower digits of the display register. By operating the unit designation key, it is displayed that the lower digit of the display register is the unit designated by the unit designation key. When the numeric key is operated after the unit designation key is operated, the numeric information input to the display register is moved to a predetermined value. The numerical information input by the numerical key operated after the operation of the unit designation key is input into the next lower digit of the digits in which the numerical information of the display register is displayed after the transition. Display data indicating that each of the lower digits is a non-input digit of the numerical value is input to each lower digit of the input digit of the numerical information. Along with the transition of the numerical information, it is displayed that the lower digit of the digits displayed in the numerical information is the unit specified by the unit designation key. In response to the operation of the numeric key after inputting the display data, numerical information is sequentially input from the upper digits among the lower digits to which the display data has been input in the display register. The key-controlled electronic device according to the present invention sets the lower digit of the display register to the unit specified by the unit specification key when the numerical key is operated and the unit specification key is subsequently operated. By not displaying less than the specified unit,
The purpose is to enable calculations with more digits than the number of digits displayed. Furthermore, the key-controlled electronic device according to the present invention includes:
When the numeric key is operated after the unit designation key is operated, the numeric value displayed in the display register is shifted to a predetermined digit, and then the lower digit of the displayed digit of the numerical information in the display register is moved. In the next lower digit, the numerical value input by the numeric key operated after operating the unit designation key is displayed, and for each digit lower than the digit where the numerical information is displayed, each lower digit is a numerical value. The object of the present invention is to perform a display indicating that the digit is an uninput digit, and when the numerical key is operated after the display, the numerical value is sequentially displayed from the upper digit among the lower digits. Conventionally, in key-input controlled electronic devices such as calculators, keys for digits such as millions are used.

When displaying a numerical value using [Formula], the display digit of the numerical value changes immediately when the relevant key is operated, and the number 0 is displayed in each digit below the displayed digit of the changed numerical value. I was getting used to it.

[Table] Millions However, with this input method, for example, if the display digit is 8
In the case of digits, it is impossible to display billions. Also, whether the number "0" displayed in the next lower digit after the number "6" was entered by the operator, or whether it was automatically displayed after the key operation for scale. There were times when I got confused and it was inconvenient to use the keys. The present invention has been accomplished in order to eliminate the above-mentioned conventional drawbacks. Hereinafter, a case where an embodiment of the present invention is applied to a calculator will be described in detail with reference to the drawings. Figure 1 shows an external view of an example of the same calculator. In the figure, 1 is the main body of the calculator, and 2 is a key unit provided on the main body. This unit consists of a numeric keypad from "0" to "9" and a decimal point "・" key. Numeric key 21,
Function keys 22 consisting of +, ×, -, ÷, √, M keys, etc. Unit designation key 23 representing scales such as 100 million, 10,000, 1,000, etc. Whether or not to display unit display symbols such as 100,000,000, 10,000, 1,000, etc. ``Switch'' key 24 that allows you to select and switch, device power ON and clear key C
The key 25 includes a key 25 that also functions as a key 25, and a key 25 that turns off the power. Reference numeral 3 denotes a display unit composed of, for example, an LCD (liquid crystal) or the like, which displays the numerical information to be displayed or the unit display symbols as required. By enumerating the embodiments of the present invention, the following novel calculators and the like can be realized. The relationship between the key operation example and the display is as follows.

[Table] In other words, in Fig. 1, when the unit designation key "10,000" and the symbol for displaying "10,000" are formed on the display unit 3, and the "10,000" key is operated, the 10,000 digit is fixed. This will be explained later, but to explain in more detail, after operating a unit key (such as the ``10,000'' key), the number entered following the unit key will not be shifted and will be placed as is. It's summery. Therefore, by operating the decimal point "・" key, it is assumed that the thousands, hundreds, tens, and ones digits following the "10,000" digit will not be filled with numbers other than "0". The number "0" is automatically inserted (input) and displayed, and then the decimal part number is entered.

[Table] In addition, in the case of a numerical value such as 120,000,000 (120 million), a "100 million" key is provided, and by operating the "100 million" key, the 100 million digit and the 10,000 digit are fixed, and the following number is set to 1000. The configuration is such that it is not necessary to input the final numeric value "0" because the tens of thousands and millions of digits are input. By configuring the system so that the operation of the numerical value "0" key that indicates the final scale can be omitted, it is possible to prevent key input errors, reduce the number of times the numerical value "0" key is operated, and eliminate the complexity of key operations. I can do things.

[Table] Furthermore, according to the present invention, after inputting the unit designation key,
By displaying a lowercase zero (hereinafter referred to as "small 0") until a valid number is input, the current key input position can be easily known.

[Table] Furthermore, in addition to the 4-digit unit keys such as "100 million", "10,000", "1000", etc., there are also "Billion" keys,
Unit designation keys for three-digit divisions, such as a Million (one million) key and a Thousand (1000) key, can be provided (not shown in FIG. 1). The above embodiment shows a case where a numerical value such as 12'340'000 is input. The apparatus and method for specifically realizing the above invention will be explained in more detail below. FIG. 2 is a system block diagram of the calculator for embodying the present invention. In the figure, 2 is a key unit, 3 is a display unit,
4 is an oscillation circuit that generates a clock signal for internal operations; 5 is a memory (for example, ROM) that generates instruction commands and executes various operations in RAM 6 and arithmetic logic unit ALU;
is memory that can be read and written (e.g.
(RAM) to temporarily hold various data. This data is entered via the key unit 2. 7 is an arithmetic logic unit, and 8 is a display memory, such as random access memory (RAM).
Then, this memory decodes the data in RAM6,
Unit display symbols such as 100 million, 10,000, 1000, etc. are for this display.
By setting or resetting one bit in RAM, the unit display symbol is turned on or off. 9 is a divider, 10 is a timing logic circuit that generates a timing signal, and the display RAM 8,
The timing logic circuit 10 and the divider 9 generate display signals, and the display unit 3 includes, for example,
It is connected to the LCD (liquid crystal). A specific arrangement of the RAM 6 is shown in FIG. This RAM has four operation registers: X, Y, Z, and V. The X register also serves as a display register, and a predetermined area of the V register is a memory area that stores billions and acts as a counter. It has a memory area k which stores i and the unit of ten thousand and acts as a counter. More RAM
has a memory register M and a flag register F, and the flag register F is an input buffer (B ₁ to _{B 3} ) that temporarily stores the key code input from the key unit 2, a "billion" key, and a "man" key. It has a flag Q that is set by operating the unit keys such as 0 to 9 and reset by operating the decimal point "." It is established to determine the In addition, the D flag is a flag that determines that the decimal point "・" key has been pressed, and the "billion" flag and "10,000" flag are each "billion".
This is a flag to determine that the ``10,000'' key has been pressed. Therefore, RAM is arithmetic register 4
It has a memory capacity of 6 registers, 4 bits x 16 digits x 6 registers = 384 bits. FIG. 4 detects the operation of the unit designation key after the numeric key operation, and in response to the detection output, shifts the numerical information input by the key to be displayed by the number of display digits corresponding to the unit of the unit designation key, A flowchart is shown for inserting and displaying the numerical value "0" in all the lower digits of the transferred numerical information. In the figure, <sub>S1</sub> is the "100 million" flag or "10,000" flag in the F flag register in the RAM area shown in FIG.
flag is set, i.e. ``billion'' key,
The flag indicating whether the ``10,000'' key has been pressed, S ₄ , determines whether the unit specification key has been pressed immediately before pressing the numeric key. Also, S ₁₀ , S ₁₂ ,
S ₁₄ is the third digit of the X register (Figure 3),
The code 000｜001｜indicates a lowercase zero (small “0”) as the second and first digit codes will be explained later.
(=13), and steps S ₂ , S ₆ , and S ₁₆ indicate that the contents of the X register are shifted to the left by one or four digits, respectively. Further, S ₃ , S ₇ , S ₁₁ , S ₁₃ , S ₁₅ , and S ₁₇ each indicate that a predetermined numerical value N is input into a predetermined digit of the X register. Furthermore, S ₈ and S ₁₈ indicate that the small "0" code 000|001| (=13) is input into the first to third digits of the X register. Furthermore, the unit display processing in S ₉ and S ₁₉ is a processing routine for automatically displaying numerical information entered by key input together with a unit designation symbol in the form of a numerical value "0", as will be described later. In this routine, for example, the i and k counter areas shown in the RAM arrangement in FIG. 3 are used to display unit display symbols. For example, when this process of 4→i, 0→k is executed,
The unit display symbol for "100 million" is displayed in the fifth digit, and the unit display symbol for "10,000" is displayed in the first digit. Here, an example will be given and explained according to a flowchart.

[Table] First, when you press the numeric key "1", the "100 million" flag and "10,000" flag in the RAM area (Figure 3) are not set in the initial state, that is, 100 million ≠ 1, 10,000 ≠ 1.
Therefore, proceed to step _S2 and register the X register (third
Shift the contents of (Figure) to the left by one digit. Allows you to input this shift and the next value. At step _S3 , "1" corresponding to the numerical value N is input into the first digit of the X register. Subsequently, when the ``100 million'' key is pressed, the process proceeds from step <sub>S1</sub> to <sub>S4</sub> , and the flag Q is set by the operation of the ``100 million'' key. Flag Q checks whether the unit specification key, in this case the "billion" key, is pressed just before pressing the numeric key, so if you press the "billion" key followed by the numeric key "2"
Proceed to S ₁ → S ₄ → S ₅ , reset flag Q, and
Shift the contents of the register to the left by 4 digits (S ₆ ). Therefore, the previously input numerical value "1" is stored in the fifth digit _X5 . In step _S7 , enter the numerical value N=
Store “2” in the fourth digit of the X register, _X4 . Furthermore, in step _S8 , a code 000|001|(=13) for displaying a small "0" in the first to third digits ( _X1 to _X3 ) of the X register is input to the X register. At step S ₉ , X ₁ in the X register
~Execute processing for displaying the numerical information 12000 stored in _X5 , the unit display symbol for "100 million" in the fifth digit, and the unit display symbol for "10,000" in the first digit. In this case, the process 4→i is performed on the i counter provided in the V register of the RAM area in FIG. 3 to display "billion" in the fifth digit. This process can be accomplished by incrementing the i counter by the number of shifts of the X register executed in step _S6 . Also, in order to display "10,000" in the first digit, change the k counter of the V register from 0 to
Execute the process k. The contents of the i and k counters in this RAM are decoded by the display RAM 8 (Fig. 2),
Set 1 bit in the display RAM corresponding to the 5th digit of "100,000,000" and set the display RAM bit corresponding to the 1st digit of "10,000".
By setting one bit in the RAM, a desired unit display symbol can be lit at a predetermined digit. In the above case, when numerical data is input after the numerical value "2", the flag _Q is reset using the numeric keypad or the _decimal point "." It is possible to judge whether the code for displaying a small "0" in the eye X ₃ is stored and to input the entered numerical value in place of the small "0" code. Furthermore, the same process can be performed for the X registers X ₂ and X ₁ as well. Also, if the code for displaying small “0” in X register X ₃ to X ₁ is not stored,
The process advances to _S16 , and the processes of _S16 to _S19 are executed in the same manner as described above. Therefore, according to the present invention, when inputting a numerical value including "0", the operation of the zero key for inputting the final numerical value "0" is omitted by operating the unit specification key indicating the scale. After pressing the unit specification key, the scale of the upper digits of the numerical value (billion, million, etc.) is fixed.
In other words, by adopting a method that allows the numeric value following the unit specification key to be entered as is without being shifted after the unit specification key is operated,
If a ``0'' continues at the end of a numerical value, there is no need to repeatedly press the ``0'' key. Furthermore, FIG. 5 is a flowchart for a case involving operation of the decimal point key ".". An example will be explained here.

[Table] First, flag Q is used to determine whether a unit specification key (such as a ``billion'' or ``10,000'' key) was pressed immediately before pressing a numeric key. The decimal point "・" is displayed with the first key operation immediately after.
When the key is pressed, reset the Q flag (n ₂ )
At the same time, the contents of the X register are shifted to the left by 4 digits (n ₃ ), and flag D (the flag of the F register in FIG. 3) indicating that the decimal point "." key has been pressed is set. Also, the flag Q is reset, that is, "10,000".
If the number has been entered using the numeric keypad before pressing the decimal point "・" key, the code 000｜001｜ is used to display a small "0" in the 3rd to 1st digits of the X register. (=13) is memorized (n ₄ , n ₆ , n ₈ ), and if it is memorized, a code to display a normal size “0” instead of a small “0” (e.g. 0000)
Store in X ₃ to X ₁ (n ₅ , n ₇ , n ₉ ) and set the D flag. After that, numbers can be entered using the numeric keypad in the same way as on a normal desktop calculator, with the decimal point flag set. In the above, the unit display method is that by pressing the "10,000" key, 0 → k is executed for the counter k of the V register shown in FIG. 3, and "10,000" is displayed in the first digit. symbol is displayed. As described above, it is possible to realize various devices such as calculators that employ the present invention. As explained above, according to the present invention, numerical keys,
In a key-controlled electronic device that is equipped with a unit designation key that represents scale values such as 100 million, 10,000, 1000, etc., and a display register into which numerical information to be displayed is input, the numeric key that is operated before the unit designation key is operated. means for sequentially inputting the numerical information input by the display register from the lower digits; and in response to the unit designation key being operated after the numerical information is input to the display register;
a display means for displaying that the lower digit of the display register is the unit specified by the unit designation key; and input to the display register in response to the operation of the numeric key after the operation of the unit designation key. The numerical information that has been displayed is shifted to a predetermined digit, and after the shift, the numerical information is input to the next lower digit of the lower digit in the displayed digit using the numeric key operated after operating the unit designation key. Means for inputting numerical information and inputting display data indicating that each lower digit is a non-input digit of the numerical value in each lower digit than the input digit of the numerical information; Accordingly, a processing means for displaying that the lower digit of the digit in which the numerical information is displayed is the unit specified by the unit designation key, and a processing means that responds to the operation of the numerical key after inputting the display data. and means for sequentially inputting numerical information from the higher digits among the lower digits inputted in the display data of the display register, so that calculations (displays) of more digits than the number of digits to be displayed can be performed. I can do it. For example, numerical values in billions can be displayed using an 8-digit display, and numerical calculations can be performed. Moreover, after the unit specification key is entered, until a valid number is entered, each lower digit of the displayed number is displayed as an uninput digit, making it easy to know the current key entry position. This makes key operations easier and improves operating efficiency.

[Brief explanation of the drawing]

Figure 1 is an external view of an example of a calculator adopting the present invention, Figure 2 is a system block diagram of the same calculator, Figure 3 is a layout diagram of the RAM shown in Figure 2, and Figures 4 and 5 are 3 is a flowchart for explaining the operation of FIG. 2. In the figure, 1...Main body, 2...Key unit, 21
... Numeric key, 22 ... Unit specification key, 3 ... Display unit, 4 ... Oscillator circuit, 5 ... ROM, 6
...RAM, 7...ALU, 8...Display RAM, 9
... Divider, 10 ... Timing signal generation circuit, 11 ... I/O.

Claims (1)

[Scope of Claims] 1. In a key-controlled electronic device that is equipped with a numerical key and a unit specification key that indicates a scale such as 100 million, 10,000, 1,000, etc., and has a display register into which numerical information to be displayed is input, means for sequentially inputting numerical information input by numerical keys operated before a key is operated, starting from the lower digits of the display register; and after the numerical information is input into the display register, the unit designation key is operated. In response to
a display means for displaying that the lower digit of the display register is the unit specified by the unit designation key; and input to the display register in response to the operation of the numeric key after the operation of the unit designation key. The numerical information that has been displayed is shifted to a predetermined digit, and after the shift, the numerical information is input to the next lower digit of the lower digit in the displayed digit using the numeric key operated after operating the unit designation key. Means for inputting numerical information and inputting display data indicating that each lower digit is a non-input digit of the numerical value in each lower digit than the input digit of the numerical information; Accordingly, a processing means for displaying that the lower digit of the digit in which the numerical information is displayed is the unit specified by the unit designation key, and a processing means that responds to the operation of the numerical key after inputting the display data. and means for sequentially inputting numerical information from the higher digits among the lower digits into which the display data of the display register is input.