JPS6315614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an output mode control device for electronic equipment, and includes, for example, display means and recording means as output means, and is capable of switching between an output mode by the display means and an output mode by the display means and recording means. The present invention relates to an output mode control device for an electronic device configured as follows.

For example, among electronic desktop calculators, there are calculators with printers that are equipped with both display means and printing means as information output means. Conventionally, this type of printer is equipped with a mode switching means for switching between a print mode and a non-print mode, and a print key for issuing a print command in a certain type of small desk calculator. For example, a two-contact slide switch or a key switch is used as the mode switching means, and one of two modes is set depending on the operation of the slide switch or key switch. When the print mode is set by this switch, input information and calculation results using the numeric keys and function keys are printed by the printer. Furthermore, when the print key is operated, the display contents at that time are printed regardless of the mode at that time.

By the way, recently, with the development of technology, it has become possible to downsize printers, and therefore, it has become possible to downsize the entire device. In order to miniaturize the entire device, not only the miniaturization of the printer but also the total number of input keys has a great influence. Therefore, reducing the total number of input keys is one of the factors for making the device more compact.

Furthermore, in the well-known conventional electronic desktop calculator with a printer, key operations for operating the printer are relatively complicated. That is,
In the conventional well-known printer, it is necessary to perform two operations, the mode changeover switch and the print key, as described above, and therefore, the operability is not necessarily good for the user.

Therefore, the main purpose of this invention is to
It is an object of the present invention to provide an output mode switching device for an electronic device that can perform the function of switching the output mode and the function of recording command with one key.

To summarize, the present invention provides an electronic device having a display means and a recording means, in which a single key is provided, and when the key is operated, an output mode is set according to the key operation when a predetermined first condition is met. This is an output mode control device for an electronic device, in which output information is given to a recording means in response to a key operation when the key is switched and another second condition is met.

The above-mentioned objects and objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

FIG. 1 is a schematic block diagram showing one embodiment of the present invention. In the configuration, the key input circuit 1 has the following configuration:
For example, it includes a key layout as shown in Figure 2,
Provides calculation information and other command information to CPU2.
As shown in FIG. 2, the key input circuit 1 includes numeric keys "0" to "9", function keys "÷", "x", "-", "+", "=", and percent keys "%". , memory keys "M+", "M-", "R・CM",
Includes paper feed key "↑~~~~", on/clear key "ON/C", off key "OFF", clear entry key "CE" and print key "P".
These keys are already well known, but
The "ON/C" key is used to turn on the power or clear the status of display registers and calculation register group 3, which will be described later.The "OFF" key is used to turn off the power. The keys are used to correct input numerical values, and the "P" key is one of the features of this invention.

The calculation register group 3 is a register for performing predetermined calculations based on calculation information etc. from the key input circuit 1 in cooperation with the CPU 2. The calculation result from this calculation register group 3 is output information as
Loaded into display register 6 and/or print register 8 by CPU 2. Display register 6
The output information loaded into the display drive circuit 5 is displayed on a display body 4 made of, for example, a liquid crystal. Further, the contents of the display register 6 are given to a comparator circuit 7. This comparison circuit 7
always detects whether the contents of the display register 6 are zero or not for each input from the key input circuit 1, for example. When the content of the display register 6 is zero, the comparator circuit 7 derives a high level output and applies it to the set input of the flip-flop H. A control signal from the CPU 2 is applied to the reset input of the flip-flop H. Therefore, this flip-flop H is set when the content of the display register 6 is zero, and is reset by the control signal at other times.

The output information loaded into the print register 8 drives the printer 10 by the printer drive circuit 9.
Printed by this printer 10.

Several control signals are derived from CPU2. The above-mentioned control signal is applied to keys other than the function keys among the plurality of keys included in the key input circuit 1, such as the numeric keys "0" to "9", the "CE" key, the "ON/C" key, and the "ON/C" key. OFF" key, or when the function key is operated in non-print mode, or when the CPU2 mode is switched from non-print mode to print mode, or from print mode to non-print mode. derived as a level. In addition, the control signal is "P"
When a key other than the key is operated, a high level is derived, and the control signal 〓 is derived as a high level when a "P" key is operated. Furthermore, the control signal is derived as a high level in synchronization with the transfer of data from the CPU 2 to the print register 8.

This control signal is then applied as a set input to flip-flop E. The above-mentioned control signal is given as the reset input of flip-flop E, and the output of flip-flop E is
It is given to one input of AND gate 12. AND
Similar to the other AND gates 11 and 13, the control signal 〓 is applied to the other input of the gate 12. As one input of the AND gate 11, the output from the flip-flop H is given,
One input of the AND gate 13 is supplied with the output of a flip-flop M, which will be described later. these three
The outputs of AND gates 11, 12 and 13 are provided in wired-OR form as the set input of flip-flop M and as the T input of T-type flip-flop P. The reset input of flip-flop M is provided with the above-mentioned control signal. Further, the output of the flip-flop P is given to the CPU 2 as a mode signal.
In the above configuration, the operation or operation of this embodiment will be explained below.

Note that the print mode described below refers to a mode in which output information is displayed on the display 4 and printed by the printer 10, and the non-print mode refers to a mode in which output information is displayed only on the display 4. This refers to the mode in which . The difference between non-print mode and print mode is whether the output information from CPU 2 is loaded only into display register 6 or
Alternatively, the difference is whether the data is loaded into both the display register 6 and the print register 8.

In operation, first operate the "ON/C" key. In response, the power is turned on, and at this time CPU2
From then on, "0" is loaded into the display register 6.
Therefore, the display 4 displays "0". Also, when the power is turned on, flip-flops M and P are forced to be reset and the non-print mode is selected. A larger current is required to drive the printer 10 than that of the display 4. Therefore, when using a battery as a power source for a long time, the non-print mode is automatically selected when the power is turned on. However, as another embodiment, the mode when the power is turned on may be the same as the mode when the power is turned off. That is, the selected state of the non-print mode or the print mode is stored in a flip-flop (not shown), and this flip-flop is always powered by a battery, so that when the power is turned on again, the selected state is stored in the flip-flop. The selected mode may be automatically selected.

As described above, assume that the non-print mode is selected, and then assume that the keys are operated in the order of "1", "2", "x", "3", and "=" using the key input circuit 1. . In this case, flip-flop P
is in a reset state, so the CPU 2 will not give the input information to the print register 8 unless there is a print command from the "P" key. That is, in this case, the CPU 2 performs arithmetic processing using the arithmetic register group 3 according to the input information. The process of this arithmetic processing is applied to the display register 6 and displayed on the display 4. The calculation result "36" is also given to the display register 6 upon completion of the calculation, and the display 4 displays the calculation result "36." In addition, "1", "2", "×"
，
Since a control signal is output when either the "3" or "=" key is operated, flip-flop E has been reset.

Here, the "P" key included in the key input circuit 1 is operated. Then, from CPU2, "P"
The key operation is detected and the control signal 〓 is derived as a high level. However, at this time, flip-flops H, E, and M have all been reset, so AND gates 11, 12, and 13 do not open. Therefore, flip-flop P is not inverted and mode switching is not performed. but,
If the mode is not switched even if the "P" key is operated in this manner, the operation of the "P" key acts as a print command. In other words, CPU2 is
After detecting the operation of the "P" key, if it is detected that the output of the flip-flop P is not inverted, the above-mentioned calculation result "36" is given to the print register 8. depending on,
"36." is printed by the printer 10.

In this way, when in non-print mode,
When the "P" key is operated immediately after entering a number or calculating, the operation acts as a print command, and the output information at that time is printed by the printer 10.
When output information is given from the CPU 2 to the print register 8, at the same time, a control signal is derived from the CPU 2 as a high level. Therefore, flip-flop E is set.

Next, assume that the "P" key is operated again. When the CPU 2 detects the second operation of the "P" key, it sets the control signal 〓 to high level. At this time, flip-flop E is already in the set state. Therefore, the output of AND gate 12 becomes high level, flip-flop M is set, and the state of flip-flop P is inverted. That is, the flip-flop P is composed of a T-type flip-flop, which inverts its state each time its input is applied. For example, when it is in the reset state, when an input is applied, it is inverted to the set state, and when it is in the set state, it inverts its state. When there is, it is reversed to the reset state. In this case, since the flip-flop P was previously in the reset state, it is inverted to the set state in response to the output of the AND gate 12, and its output becomes high level. In response to this signal, CPU 2 switches to print mode. Note that when the mode of the CPU 2 is switched, the print data is not transferred to the print register 8. Thereafter, when the function key included in the key input circuit 1 is operated, the same content as the output information given from the CPU 2 to the display register 6 is also loaded into the print register 8 in response to the operation. Therefore, for example, "2"
When the keys are operated in the order of "x", "5", and "=", "2. It will be printed.

As a premise for the print operation of "5.=10." by the printer 10 described above, as print data is transferred from the CPU 2 to the print register 8, a control signal is output from the CPU 2, so the flip-flop E
is set. Therefore, when the "P" key is operated again, a high level output is derived from the AND gate 12 again. Therefore, flip-flop M is set and flip-flop P is inverted to the reset state. depending on,
CPU2 is switched to non-print mode.
In response to this mode switching, the CPU 2 outputs a control signal, and the flip-flop E is reset. When the "P" key is subsequently operated, the control signal 〓 is derived from the CPU 2 as a high level, but since the flip-flop E has been reset, the output of the AND gate 12 does not become high level. However, at this time, since the flip-flop M is in the set state as described above, the output from the AND gate 13 is at a high level at this time, and the output of the AND gate 13 is given as an input to the flip-flop P.
Therefore, the flip-flop P reverses its state again and becomes the set state. In response, the CPU 2 selects the print mode again. In addition, CPU2
As in the case described above, when the mode is switched, no output information is transferred from the CPU 2 to the print register 8. flip flop M
is reset by a control signal output from the CPU 2 when any key other than the "P" key is operated thereafter.

Next, consider the contents of the display register 6 and the case where it is in a clear state, that is, "0". The comparison circuit 7 is
It is constantly detected whether the contents of this display register 6 are "0". When the contents of this register 6 become "0", for example, immediately after operating the "ON/C" key or immediately after operating the "CE" key, a high level output is derived from this comparison circuit 7. . Accordingly, flip-flop H is set at this time. And in this state "P"
When a key is operated, a control signal 〓 is derived from the CPU 2 as a high level. Therefore, due to the high level of both the output of flip-flop H and the control signal 〓, a high-level output is derived from AND gate 11, flip-flop M is set, flip-flop P inverts its state, and CPU 2 changes mode. Note that by operating the "P" key at this time, the printer 10
No printing operation is performed.

To summarize the above operation, when the "P" key is operated, depending on the status of other components, the mode will be switched according to the operation of this "P" key, or the "P" key will be operated. directly works as a print command. For example, if the "P" key is operated when the content of the display register 6 is "0", the flip-flop P reverses its state and the mode is switched. Furthermore, even if the "P" key is operated immediately after the printing operation by the printer 10,
Even if the "P" key is operated immediately after the mode switching by the CPU 2, the flip-flop P reverses its state and the mode switching is executed in the same way. On the other hand,
When the "P" key is operated immediately after an operation or a number setting in the non-print mode, output information is provided to the print register 8, and the output information is printed by the printer 10. Furthermore, if the print mode has been switched first and the "P" key is operated immediately after the numeric keys are operated, the printer 10 executes a printing operation. However, if the operation of the "P" key directly works as a print command, the flip-flop P
The state of is not reversed, and therefore mode switching between print mode and non-print mode is not performed.

FIG. 3 is a schematic block diagram showing another embodiment of the invention. In the configuration, the microprocessor 300 includes, for example, RAM, although not shown in the drawings.
Consists of ROM, ALU, etc. this
One area of the RAM is configured as a flag area, and the flag area consists of flags H, E, P, and M.
including. These flags H, E, P, and M perform functions corresponding to the flip-flops H, E, P, and M in the embodiment of FIG. This RAM also has an area for the display register 306 and a print register 308.
and an area for the operation register group 303, respectively. On the other hand, the ROM has a built-in program according to a flowchart shown in FIG. 4, which will be described later. Other key input circuit 1, display 4, display drive circuit 5, printer drive circuit 9, and printer 10 are the same as those shown in FIG. 1.

4a and 4b are flowcharts for explaining the operation and operation of the embodiment of FIG. 3. FIG. The operation of the embodiment in FIG. 3 based on such a flowchart will be easily understood by referring to the operation described for the embodiment in FIG. 1 earlier, so a detailed explanation thereof will be omitted here. do.

In the above-described embodiment, the display register 6 for the display body 4 and the print register 8 for the printer 10 are separately provided, but a common register is provided and the display body 4 and the print register 8 are provided separately. /Or output information may be selectively provided to the printer 10.

Further, in the above embodiment, a small electronic desk calculator with a printer was described as an example of an electronic device. However, the present invention can be applied to other electronic devices as well. for example,
It can also be applied to electronic devices that take hard copies from the display screen of a CRT display. In this case, for example, in the non-print mode mentioned above,
Display only on CRT display,
In the print mode, a hard copy of the display screen of the CRT display is obtained by the hard copy device. Further, when the "P" key functions as a print command, it is sufficient to cause the copying device to copy only the display screen of the CRT display at that time.

As described above, according to the present invention, it is possible to switch the output mode or use it as a recording command depending on the conditions when operating a specific key. The switching function and the recording (printing) command function can be combined with a single key operation. Therefore, according to the present invention, the total number of input keys can be reduced, and when used in, for example, a small electronic desktop calculator with a printer, it becomes possible to downsize the overall structure of such a device. . Moreover, as mentioned above, mode switching is achieved by one key operation,
Alternatively, since a recording command can be obtained, key operations for recording are much easier to understand than conventional ones.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing an example of the key arrangement of the key input circuit 1 in FIG. 1. FIG. 3 is a schematic block diagram showing another embodiment of the invention. 4a and 4b are flowcharts for explaining the operation and operation of the embodiment of FIG. 3. FIG. In the figure, 1 is the key input circuit, 2 is the CPU,
3 is a group of calculation registers, 4 is a display body, 5 is a display drive circuit, 6 is a display register, 7 is a comparison circuit, 8 is a print register, 9 is a printer drive circuit, 10 is a printer, 11, 12 and 13 are AND gates ,3
00 indicates a microprocessor.

Claims (1)

[Scope of Claims] 1. An output mode control device for an electronic device comprising a display information storage section, a print information storage section, and means for displaying and printing the contents of these storage sections, which switches between print mode and non-print mode. a single instruction key for giving instructions or printing instructions; and a first state in which the display information storage section is in a clear state, or in which no key is operated after the printing operation is performed by the printing means. Second
switching means for switching to either the print mode or the non-print mode in response to the operation of the single instruction key in the state; means for cyclically switching between the print mode and the non-print mode each time the single instruction key is operated while no key is being operated after the switching; and in the non-print mode state; , means for executing a printing operation by the printing means in response to the operation of the single instruction key when neither the first nor the second state is present. Equipment output mode control device.