SU1386983A1 - Data input device - Google Patents

Abstract

The invention can be used in computer technology for manual entry of information into a computer. The aim of the invention is to improve the speed of the device. The device contains a decoder 1, a pulse generator 2, a counter 3, a keyboard 4, a register 5, a constant memory unit 6, a multiplexer 7, a single vibrator 8 trigger 9, an element 10. The increase in the speed of the device is ensured by eliminating the influence of the "bounce of the mechanical contacts of buttons and increasing the frequency of the pulse generator. The device allows parallel and sequential input of the character of the pressed button. 1 il.

Description

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the action of signals coming from the outputs of register 5 to the address inputs of memory block 6, and allowing the device to work with any code pre-recorded in memory block 5 (for example, KOI-8, etc.). In this case, a check bit is also entered in memory block 6 during memory programming, which ensures parity or odd parity during transmission. At the output, a multi-Invention relates to automation and computer technology and can be used in devices for manually entering information into a computer.

The purpose of the invention is to increase the speed of the device by eliminating the influence of the mechanical contact of the buttons.

The drawing shows a structural

Scheme of the device. „..

The device contains a decipheror 1, a plexer 7 appears a serial code generator of 2 pulses, a counter 3, a key corresponding to the pressed button and through

element And 10 is fed to the output device. The parallel code is removed from the outputs of the memory block 6.

The transfer of the serial code will end at the moment when the counter 3 is set to "O, and the trigger 9 is reset."

When the matrix 4 button on the output of multiplexer 7 is removed, the counter 3 is equal to 64. Under the influence of a sequence of pulses, the support of 2 pulses at the output of the counter one-vibrator 8 in the on

after some time, determined by the time constant of the single-vibrator RC circuit 8, the latter is set to

4, register 5, fixed memory block, multiplexer 7, one-shot 8, trigger 9, and element 10.

The device works as follows. - In the initial state, no button, ie, is pressed. At the output of Multiplesor 7, there is a logical “O” signal. At the output of the one-shot 8 signal logic SO sets the conversion factor

A sequence of 2 codes is cyclically repeated. The outputs of the youngest four) devices of the counter 3 are fed to the inputs of the delimiter 1, which produces the following, logical status. In this way

The conventional scanning of 16 columns in (keyboard matrix 4). The outputs of the upper four bits of counter 3 are fed to the multiplexer 7 inputs. Since the counter 3 conversion factor is 64 and.

the device returns to its original state.

The proposed device allows not only parallel but also

Consequently, in the last two most senior data inputs, to work with the bits of the counter, there is always a local input, then multiplexer 7 only polls the status of the outputs 11; the keystroke 4.

I When pressing the keypad button 4, the output of the decoder 1 is connected to the input of multiplexer 7. At the time when the output of meter 3 is the code corresponding to the position number of the button pressed, the output of Multiplexer 7 shows a logical signal “1 which starts the one-shot 8. During the time the button is pressed, the output of multiplexer 7 contains a sequence of pulses whose duration is determined by the frequency of

any code pre-recorded in the memory block.

Claims (1)

Invention Formula 35 A device for inputting information containing a keyboard, a multiplexer, a decoder, a pulse generator, a counter, a trigger, an element, And the keyboard inputs are connected to the decoder outputs, the inputs of which are connected to the outputs of the low bits of the counter, the keyboard outputs are connected to the inputs of the first group of the multiplexer , the inputs of the second group of which are connected to the inputs of the higher bits of the counter, the output of the trigger is connected to 40 pulses, and the repetition period is the cycle of the first input element And, characterized by recalculation of counter 3. Since the pulse duration at the output of the one-shot 8 is longer than the length of the repetition period of the pulse sequence at the output of multiplexer 7, it is one-time that, in order to improve the speed of the device, a one-shot, register, fixed memory unit is entered into it, and the input of the one-shot connected to the multiplexer output and the second input The torus 8 is all the time in the included And element, the output of the one-shot connection. The signal from the output of the one-shot 8 is used to rewrite the information from the counter 3 to the register 5, set to the logical state "1 flip-flop 9, blocking the operation of the decoder 1, and pins with the first clock input and the setup input in the "About trigger", with the clock input of the register, the control input of the counter and the device ready output, the outputs of the counter are connected to the input, the ratio of the rectifier inputs of the register is set, the count outputs of the counter 3 are equal to 256. Codes for which are connected to the inputs of the hike of the memory block 6 are formed under the rescue memory, the outputs of which connect signals from the register 5 outputs to the address inputs of the memory block 6 and allow the device to work with any code pre-recorded in block 5 of the memory constant (for example, KOI-8, etc.). In this case, a check bit is also entered in memory block 6 during memory programming, which ensures parity or odd parity during transmission. At the exit multi „..   of plexer 7, a sequential code appears corresponding to the pressed button and through the device returns to its original state. The proposed device allows not only parallel but also  o sequential data entry work with any code pre-recorded in the memory block. Invention Formula 35 A device for inputting information containing a keyboard, a multiplexer, a decoder, a pulse generator, a counter, a trigger, an element, And the keyboard inputs are connected to the decoder outputs, the inputs of which are connected to the outputs of the low bits of the counter, the keyboard outputs are connected to the inputs of the first group of the multiplexer , the inputs of the second group of which are connected to the inputs of the higher bits of the counter, the output of the trigger is connected to 40   the first input of the AND element, the first input of the AND element, By the fact that, in order to increase the speed of the device, a one-shot, register, block of permanent memory is inserted into it, the one-shot input is connected to the multiplexer output and the second input element And, the output of the one-shot connection element And, the output of the one-shot connection pins with the first clock input and the setup input in the "About trigger, with the clock input of the register, the control input of the counter and the device readiness output, the outputs of the counter are connected to the terminal 3 are not connected to the inputs of the third group of multiplex-connected to the second clock input of the trigger and are informational outlets, the output of which is connected to the controllers of the parallel device code, the output input of the decoder, the output of the element The pulse generator is connected to the clock. It is an information output after the arrival of the counter, the most significant bit of the corresponding device code.