SU1418692A2 - Data input device - Google Patents

Abstract

The invention is related to automation and computing and is intended to enter information into a digital device from a keyboard. The goal is to expand the scope of use due to the possibility of transcoding key codes. The device contains the first 1 and second 5 groups, the basic elements, the keyboard 2, the first 3 and second 6 encoders, the first 4 and second 7 and third 19 registers, the element OR 8, the element 9, the delay element 10, the synchronization unit 11, the trigger 12, the matching element 17, the switching element 18, the first 13 and second 15 elements And, the device clock input 14, the device clock output 16 and the device information outputs 20. In the proposed device, an increase in the coefficient of the input information codes occurs without an additional increase in the number of switching elements, i.e. with the same number of keys. 1 кп. (L 00 o th N)

Description

I The invention relates to automation and computing, is intended to enter information into a digital device from the keyboard and is an improvement to the device according to the author. St. No. 1345182.

The purpose of the invention is to expand the scope of application due to the possibility of recoding key codes.

I The drawing is a diagram of the proposed device.

: The device contains the first group of 1 unbundling |; their elements, which are connected via a horizontal bus switching elements of the keyboard 2 4 inputs of the first encoder 3, information (the output outputs of which are connected by t information inputs of the first register 4, the second group 5 which are connected via a vertical bus switching elements of the keyboard 2 with the inputs of the second encoder 6, information outputs-: which moves are connected to the information inputs of the second register 7.: Control output of the first encryption Ator 3 is connected to the input of the parallel recording of the first register 4 and the first input of the element OR 8, the output of which is connected to the inputs of the second group 5 of the decoupling elements and the input of the element NO 9, the output connected to the inputs of the first group 1 of the decoupling elements. connected to the input of the parallel recording of the second register 7, to the output of the control signal of the second encoder 6 and the input of the delay element 10, the output of which is connected to the first input of the synchronization unit 11, the C input of the trigger 12 and the first input of the first element And 13. The second input of the block 11 v. Is input 14 of the sync signal of the device, and the output is connected to the first input of the second element AND 15, the output of which is the clock output 1 of the device, and the second input is connected to the inverse output of the trigger 12, the information input of which is connected to the common bus, the installation input through the matching element 17 is connected to the power supply and the second output of the switching element 18, the first output of which is connected to the common one, to it by the bus. Direct output trigger 12 is connected to the second input of the first element And 13, the output of which is connected With the input of the parallel recording third

register 19, the information inputs of which are connected to the outputs of the first 4 and second 7 registers and are the low bits of the information output 20 of the device, and the outputs of the third register 19 are the highest bits of the information output 20 of the device.

The device works as follows.

When entering the next information, it is necessary to preset the code of the high bits of the information output 20 of the device. Dp of this, the switching element 18 is closed (implemented as a button with a return), while at the forward output of the trigger 12 there appears a single level allowing the passage of pulses through the And 13 element, and the inverse output of the trigger 12 prevents the passage of clock pulses through element 15. Now you need to press a certain key, for example 1, for further input (pressing the necessary keys of the keyboard 2), for example, the letters of the Russian alphabet. By pressing the key 1 of the keyboard 2 by acting on the rising edges of the control pulses of the encoders 3 and 6 on the parallel recording inputs of registers 4 and 7, the code of key 1 is written to registers 4 and 7. And by the influence of the control pulses of the encoder 6 on the delay element 10, the key 1 is generated , which arrives at the clock input of the trigger 12, to one of the inputs of the element And 13 and to the first input of the synchronization unit 11, forming a clock signal. Since the element 15 is closed, the passage of clock pulses to the clock output 16 of the device is excluded, and the output of the element 13 appears a pulse, with a falling edge at the input of the parallel recording of register 19 (information is written to register 19 on the falling edge impulse acting on the input of parallel recording) information is recorded from the output of registers 4 and 7 to the output of register 19. Thus, a parallel code of the higher bits of the input information is formed. At the same time, with the influence of the falling edge and Pulse click on the trigger input of trigger 12 (recording information

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trigger 12 occurs on the falling edge of the pulse acting on the trigger trigger input) the zero is recorded. Then the element And 13 closes, and the element And 15 opens. Subsequent pressing of any key (e.g., letters of the Russian alphabet) of keyboard 2 does not trigger trigger 12 into one state, and the output of register 19 is left with the code corresponding to the most significant bits of the input information of output 20 formed by the first key pressed after switching element 18 while the output of registers 4 and 7 sets the code determined by pressing the next key and corresponding to the lower bits of the input information of output 20, and the signal generated by the synchronization unit 11 passes through the element And 15 to the output 16, corresponds to the clock readiness information on the output 20 of the device. Thus, by switching the element 18 and then pressing one of the keys of the keyboard 2, the codes of all the keys of the keyboard 2 are operatively transcribed. At the same time, the increase in the number of input codes occurs without an additional increase in the number of switching elements, i.e. with the same number of keys.

18692

Claims (1)

Invention Formula Device for entering information on the author. St. No. 1345182, characterized in that, in order to expand the scope of application due to the possibility of transcoding key codes, a third register, first and second And elements, a trigger, a matching element, a switching element, the first output of which is connected to the common bus, and the second - with the installation input of the trigger and through the matching element - with the power source, the information input of the trigger is connected to the common bus, the inverse output of the trigger is connected to the first input of the second element AND, the output of which is the clock output of the device voystva, and the second input is connected to the output of the synchronization unit, the first input of which is connected to the trigger input of the trigger and the first input of the first element And, the second input of which is connected to the direct output of the trigger, and the output of the third input They are not associated with the corresponding outputs of the first and second registers, the outputs of the third register are additional information outputs of the device.