JPS58189729A - Key input device - Google Patents

Abstract

PURPOSE:To eliminate a diode for preventing non-operation signal and to miniaturize a key input device, by inhibiting the processing of an operation signal when a counting value is discriminated as >=2 after counting the operation signals supplied from an output line. CONSTITUTION:The timing signals which are time-divided to input lines a0- a3 are supplied to key switches S00-S33 which are distributed in a matrix form form an input controlling part 6 via a buffer 8. The timing signal is delivered to output lines b0-b3 with operation of one of the switches S00-S33 and then supplied to counters 3a-3d as well as to the part 6 via a buffer 7. The counters 3a-3d count the timing signals, and a detecting signal is supplied to the part 6 from a line C2 via an OR gate 4 when the counting value of the timing signals becomes >=2. The part 6 transmits a resetting signal to a line C1 when the detecting signal is decided as a non-operation signal and at the same time delivers an inhibition code to the lines a0-a3 from an inhibition memory M to inhibit the processing of the operation signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a key-powered device in which a plurality of keys are arranged in an i-trix pattern.

Conventionally, the above-mentioned key-operated devices include an input island arranged in a plurality of key switches, as shown in FIG. 1, for example. That is, the output of the inverter 1 & is set to the key switch 8°, S,. %B□. ''30 is connected to the valley and leakage, and each output trend of each inverter 1b, 1c, ld is connected to the corresponding key switch S01-831.'
It is connected to one end of each of tH-832, 803 to 83B. Furthermore, key switch S. . ~”Each other end of “OS” is connected to inverter 2&, and also key switch “10”
``''S13''20''''S25, 830''''5830 are respectively connected to the input terminals of inverters 2b to 2d. For example, if the key switch S3° is operated, the timing signal via the inverter I. There is no output from other inverters 2° to 2□. However, key switch 83. (If Dt'i or key switch SA□, "71 is also operated at the same time, the timing signal inputted via the inverter 1a is outputted from the inverter 2d, and also the timing signal is outputted from the inverter 2d as indicated by the arrow in FIG. Key switch S, as shown.

, S, □, S2. is also output from the inverter 2C at each company. That is, even though the key switch S2° has not been operated, a signal indicating the operation (hereinafter referred to as a non-operation signal) is output. If this non-operation signal corresponds to a key that has an unnecessary meaning, problems will arise if it is processed as is. Therefore, a diode was connected to each key switch to prevent the generation of a non-operation signal. However, when the diode is constructed using a wC wire, the mounting space becomes large, the mounting space becomes large, and it also becomes expensive and requires a new work process for installation. Furthermore, especially when the keyboard is made of a conductive film, there is also the drawback that mounting the diode becomes difficult.

This invention was made based on the above-mentioned circumstances, and its purpose is to provide a key-powered device that can accurately process output non-operation signals without connecting diodes to each key switch. It is to provide.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 6. Figure 2 does not show the input part time diagram.
Since the part H surrounded by the dotted line in the figure is the same as the structure of the keyboard in FIG. 1, a description thereof will be omitted, and the same parts will be designated by the same reference numerals and omitted. The inverter 11
Timing signals are input to ~1d via input signal lines ~13 corresponding to zz, respectively. Further, the signals output from the inverters 2a to 2d are input to the corresponding counters 3a to 3d via the corresponding output lines b0 to b3, respectively. The counter 3& is constructed by connecting two stages of D-type flip-flops in series so as to avoid bending as shown in FIG. That is, the OK input terminal of the 1.2nd stage D-type flip-flop is line b. and the first D
The type flip-flop input trend is the second stage D type lip 7.
The Q output terminal of the first stage D-type flip 7 is connected to the second stage D-type flip 7.
It is connected to the D input layer of 0. Then, l, 2nd check (the reset terminals of the DDm flip 70 tubes are all connected to the line C1, and the Q output terminal of the first stage D-type flip-flop is connected to the line c2 via the OR circuit 4. The configuration of the counters 3b to 3d is also the same as that of the counter 3&, so a description thereof will be omitted.

Figure 3 shows the circuit diagram of the J1 part circuit 12), where the signal output from the input section 5 described above via the line 02 is input to the human control circuit 6, and the output line b0
The data via ~b is loaded into the buffer 7. The data written in the buffer 7 is inserted into the input control circuit 6 by the adjustment signal H applied from the input control circuit 6. The input section circuit 6 is provided with an addition/subtraction circuit (not shown) in addition to the X and Y registers in which key codes are stored, the second register in which input codes are stored, and the 1 and N registers. Then, the input control circuit 6 outputs a reset F signal via the line C1, and also outputs a timing signal for scanning the operation keys together with a homicidal signal W to the buffer 8. This buffer 8 generates four-digit registers corresponding to the input lines 9° to 9J, respectively, and sends the written timing signals to the corresponding human-powered lines. In addition, the input l'bl + gate circuit 6 transmits and receives data between the fin C2 and the QA'4 manual input.

The thread running memory MK stores in advance whether the input is a key code for thread lifting. Also, enter the FfT sufficient key code in the input side #To6Lm Y register.
-' Send to Z register of COP U 9.

Next, the operation of this invention will be explained. First, for convenience of explanation, the operation of the input section 5 will be briefly explained. A time-divided timing signal is firstly inputted from the input 11JII1 unit 6 through the amplifier 8 to the human power line ~~&3, and the operated key switch is scanned. At this time, for example, if only the switch 810 is operated as shown in FIG. 4, when the human power line ay timing signal is input, a signal is output to the output fin b1. This number 46 is also input to the counter 3bK at the same time, and the first stage D-type frisono flop is set. Next, the input line Machi ~ & 3 is inputted to Tie 42 F16, and when all keys are scanned, a clear signal is output from the input section corner circuit 6 to line C1, and the counters 3a to 3d are each input. Type Furisogefrog is reset.

Therefore, there is no output from each counter 3a to 3d. By the way, for example, the key switch "30%sJ1," Jt
If operated at the same time, the input line.

When the busy timing signal is input, output line b.

In addition to outputting each issue via the key switch SJO”
The signals bypass S31.8□1 and are output via the output line b2. As a result, counters 3d, 30
Each first stage ODm fling flop is set. When a timing signal is input to the input line &1, a signal indicating the operation of the key switch S2I is output again via the output line b, and as a result of ζ0, the counter 3 o K
Since two clocks gM are input, signals are output from the counter 3o via the OR circuit Th4 and the line C2, respectively. That is, the signal via line C2 is output as a non-operation detection signal indicating that key switch S28, which is not actually operated, is output as an operated key. Subsequently, a timing signal is output to the human power line 1L2%a3, and a clear signal is input to the fin C1.

By the way, in the base 1 memory M...J key switch"o
Considering the arrangement state of o to SJ3, the key switch S2
．． If (assuming that each key switch is inconvenient and outputs a non-operation signal like the corresponding signal, the key code corresponding to the key switch that is inconvenient if input is allowed is set as a prohibition code. It is assumed that the outline C+ is set up.Next, the creation of the human control circuit 60 will be explained according to the flow shown in FIG.

That is, in step S□, the X register of the input control circuit 6 is cleared. Next, at step 8V, 0'' or 1 is written into each register n and i in the manual mj-circuit 6.Then, the process moves to step 8, and the input fin lL3 specified by the contents of the n register is programmed and the timing is set. The old number is output.Next, the process moves to step S4, and the input control circuit 6 outputs the buffer 7-\adjustment signal R.
Output line b stored in buffer 7. The signals above ~3 are omitted to the X register. That is, output line b.

No. 18 on ~3 is the X specified by Lujista as a key code along with the timing signal of the deleted car line a.
It is pledged to the neighboring register X1, X1→1.

At this time, output line b. , if a non-operation signal is output to input line 1. It is written into the adjacent digits of the X register along with the timing signal. After writing 4 into the X register in this way, the process moves to step S5, and the contents of the n register are incremented by 1. Next step S.

If it is determined that the content of the n register is "3" or less, it is assumed that all the key switches have not been scanned yet, and the process returns to step S8. In step 1, if the content of the n register is greater than "3", it is determined that the -reverse timing signal has been output to the input line ~), and step 87
Move to. In step S7, it is designated by the contents of the register of the input control circuit 6. Digit Xi of the X register,
It is determined whether the current key code written in Xl+1 is included in the key codes stored in the X register, and if it is determined to be YIC8, the process moves to step S. In step S, input side #l[l! A clear signal is output from the circuit 6 to the line C1, and each counter 3...
The contents of 3D are cleared, and the contents are transferred to this game S.

If the key code in the X register is not found in the key code of the X register in Step S7 of 1SiJ, then the process moves to Step S, and the key code of the X register is transferred to the X register. Next, in step “10V (move, human power city 1”) notification #166, the non-smoke f via line C2
The presence or absence of input of the += detection signal is detected, and if it is determined that there is no human effort, it is assumed that the key code stored in the X register does not include a non-operated key code, and the process moves to step S1□. Stesono S engineering.

At , the key codes stored in digits Yi and Yl+1 of the X register are converted into input codes. Next, the process proceeds to step S1□, where the converted manual code is utilized by the CPU 9, 1 is written into 2 registers, and then the process returns to step S1.

=iJ 7S. In this case, if an unoperated key code is detected via line c2, it is determined that the unoperated key code has not been written to the X register, and the process moves to step S14. In step s13, the key codes stored in digits Yi and Yi+1 of the Y register are converted into input codes. Next, the process moves to step S14, and the input prohibition code stored in the prohibition memory M is searched. Next, step S1. The process proceeds to step S1, where it is determined whether or not the searched input prohibition code includes the f-converted input code.If MO is determined, the process proceeds to step S1.
, the input code is output, and if it is determined to be YIC8, the process moves to step S1. Proceed to. In step Sts, the contents of Lujista are updated, and then the process proceeds to step 51fK.
It is determined whether the contents of the register have been completed, that is, whether the input prohibition code has been searched for all the key codes stored in the Y register. If YIC8 is determined, the process returns to step S.

If the key switch S10 shown in FIG. 4, which is set to both speeds, is operated alone, steps S and -S are performed.

is executed, and at the same time as this operation, step 8. 〜5Iffi "I goes to Il1st stage and is output as an input code. Then, while key switch S1° is being operated, key switch Sj
If Q' S4I and S2□ are operated, the key switch 810'''J., S3゜, S3□ is in the X register.
, S2I are stored. By the way, since the key code for turning off the key switch S1° has already been stored in the Y register, steps 81 to S are repeatedly executed without proceeding to step S.

Next, the operation of the key switch SI0 is released, and the key switch S. , S38.8□1 is continued. Since the X register does not include the key code indicating the key switch S1°, the process moves to step S at the timing of the signal fρ shown in FIG. 4, and steps 8. . ~S17 is executed. At this time, the key switch S2 transferred to the Y register
The key codes for ゜, '30% S□, 8□, respectively are converted into input codes in sequence, and among these, the input code corresponding to key switch S2゜ is stored as an input prohibition code in the prohibition memory y. If so, output of that input code is prohibited, and other manual codes are output.

In the above embodiment, counters 31 to 3d for counting the number of operation signals are provided in each output line in order to detect non-operation signals that are not actually operated.
However, the present invention is not limited to this, and the configuration may be such that the number of operation signals is directly counted by an adding circuit of the input control circuit 6 to determine the presence or absence of the non-operation signal.

As explained above, according to Jin's invention, when an operation signal is input from the output line, this operation signal is counted, and if the counted value is 2 or more, the predetermined operation is performed. Since the processing of the signal is prohibited, it is possible to appropriately process the non-operation operation signal that is output even though the operation is not actually performed. Therefore, there is no need to provide a diode to prevent this non-operation signal.
This has the advantage that the device can be made smaller, can be manufactured at a lower cost, and can be freed from troublesome installation work.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of a keyboard for explaining the present invention in detail, FIG. 2 is a circuit configuration diagram of an input device showing an embodiment of the invention, and FIG. 3 is an abbreviated system diagram of an input device. Fig. 4 is a time chart, and Fig. 5 is a flow chart. 3&~3d...Counter, 5...Input section, 6...Input section"#1gllR11H...
...Keyboard, Soo~S0'...Key switch, M...Prohibited memory. Patent applicant Casio Harisan Shin Co., Ltd.

Claims (1)

[Claims] M) A key manual means in which a plurality of IJ sock-shaped key switches are arranged, a plurality of output lines from which operation signals of the key switches are derived, and a key output line that is provided corresponding to the output line and outputted. Stitch number means increments the number of operation signals by 1, and when the operation signal from the output line is input, the stitch number means calculates the total #! A key human power device comprising: a determining means for determining whether the i value is 2 or more; and a prohibiting means for preventing processing of the predetermined operation signal when it is determined that the i value is 2 or more. .