SU1524043A1 - Information input device - Google Patents

Abstract

The invention relates to automation and computing and can be used to manually enter information into processing devices. The aim of the invention is to increase the reliability of the input information by blocking the release of information while simultaneously pressing two or more keys. The device contains a keyboard 1, a multiplexer 2, a pulse generator 3, the element And 4, the counter 5, the element NOT 7, the element OR 6, the first and second triggers 8 and 10, the element of comparison 11, the register 14, the shift register 13, the readiness and fault outputs devices. The use of the device allows to increase the reliability of the input information by stopping the input of information into the processing device while simultaneously pressing two or more keys. 1 il.

Description

t

(21) 4385467 / 24-24.

(22) 03/03/88

(46) 11/23/89. Bul No. 43

(72) Ya.V.Kokhany, V.I.Plish, E.G.Plish

and R.V.Seniv

(53) 681.327.11 (088.8)

(56) USSR Author's Certificate No. 840862, cl. G 06 F 3/02, 1972.

USSR Author's Certificate No. 1112358, cl. G 06 F 3/02, 1983.

(54) DEVICE FOR INPUT OF INFORMATION

(57) The invention relates to automation and computing and can be used to manually enter information into processing devices. The aim of the invention is

improving the reliability of the input information by blocking the release of information while simultaneously pressing two or more keys. The device contains a keyboard I, multiplexer 2, generator and flylys 3, element 4, counter 5, element 7, element OR 6, first and second triggers 8 and 10, comparison element 11, register 14, shift register 13, outputs Post and malfunctions of the device. The use of the device makes it possible to increase the reliability of the input information by stopping the input of information into the processing device while simultaneously pressing two or more keys. 1 il.

with S (/

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The invention relates to automation and computing and can be used to manually enter information into processing devices.

The purpose of the invention is to increase the reliability of the input information.

The drawing shows a block diagram of the device.

The information input device comprises a keyboard 1, a multiplexer 2, a pulse generator 3, an AND 4 element, a counter 5, an OR 6 element, a HE 7 element, a first trigger 8, a device group outputs 9, a second trigger 10, a comparison element 11, a fault output 12 , shift register 13, register 14, the output 15 of the readiness of the device. The output of the pulse generator 3 is connected to the first input of the element 4, the output of which is connected to the counting input of the counter 5, the outputs of which are the information outputs 9 of the device group and connected to the address inputs of the multiplexer 2, the information inputs of which are connected to the outputs of the keyboard group 1, the output of which is connected to the first input of the element OR 6, the output of which is connected to the reset input of the trigger 8, the installation input of which is connected to the output of the element HE 7, the input of which is connected to the output of the multiplexer 2 and the second input element 6. The information inputs of register i4 are connected to the outputs of counter 5 and the first input group of comparison element I1, the outputs to the second group of inputs of comparison element 11, and the clock input is connected to the first output of the shift register 13, the clock input of which is connected to the inverse output trigger 8, the information input is cood1 with a single unit level, the reset input is connected to the second input of the element 4 and the inverse output of the second trigger 10, and the second output is connected to the clock input of the second trigger 10, the reset input of which is ene yield NOT element 7, and a direct output connected to the input of the comparator 11, output equality is connected to output 15 the device is ready to output disparities yield 12 malfunction.

The information input device operates as follows.

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In the initial state, when none of the keyboard 1 keys are pressed, all selectable inputs of multiplexer 2 have logical O, at its output - logical 1, which through the NOT 7 element already holds the logical O level at the inverse output of the first 8 and The output of the second 10 flip-flops is logical O, while the logical 1 s inverse of the output of the second flip-flop 10 permits the passage of clock pulses from the output of the generator 3 through the element 4 to the input of the counter 5, at the output of which there appear successively 2 codes g-multiplexer 2 and outputs 9 of the device group. The shift register 13 is zero, and the register 14 contains arbitrary information.

When any key of the keyboard 1 is pressed, the logical 1 is fed to the corresponding selectable input of the multiplexer 2.

At the moment when the code corresponding to the number of the pressed key is formed at the output of counter 5, a logical O appears at the output of multiplexer 2, and logical 1 is output at the output of the NOT 7 element and does not change the state of the first trigger B. When it reaches A moving contact of a normally open contact is written at the second input of the element OR 6, the logical O is received. When the first input of the element OR 6 appears, logical O from the output of the multiplexer 2, when the output of the counter 5 generates a code corresponding to the number of the pressed Krta-vshi The output of the element OR 6 is Vits lopic o, which sets the reset input of the first trigger 8 at its inverse output logical 1, which, affecting the clock input of the shift register 13, overwrites the logical 1 at its new output, thus entering the code combination from the output counter 5 to register 14.

By transferring counter 5 to the next position of a companion with logical 1 at the output of multiplexer 2, and therefore, logical O at the output of the element NOT 7 sets trigger 8 to the initial position and confirms the zero position of the second

trigger 10, the clock 5 continues to arrive at the counter 5 and at its output the forg 1 sequence of 2 codes is generated. At the moment of time when the code corresponding to the number of the pressed key is re-generated at the output of counter 5, the circuit elements will be triggered in the same way as described, with the exception that no change occurs in register 14, and logical 1 is generated at the second output the shift register 13, and this will trigger the second trigger 10, at the inverse output of which a logical level O is formed, which will reset the shift register 13 and prevent the passage of clock pulses from the output g generator 3 through the element 4 and to the input of the counter 5. Logic 1 from the direct output of the second trigger 10 is fed to the control input of the comparison element 1, this compares the code links present on its first and second input groups, If the code combinations (parcels ) on both groups of inputs coincide (i.e., when there is no double or, for example, triple pressing of the plug), a single level will be formed on the equality of the equality of the I 1 comparison, allowing polling the outputs 9 of the code bit device group. If the code points on both groups of inputs do not match (i.e., when there is a double or more keystrokes), a single level is generated at the output of the inequality of the comparison element 1J, which indicates that the code generated at the output of binary counter 3 is incorrect.

When returning the bottom contact to the normally closed keyboard contact I appearing from logical 1 at the output of multiplexer 2, and consequently, logical O at the output of the element NOT 7, set the circuit to its original position.

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Claims (1)

Invention Formula A device for entering information containing a keyboard, a multiplexer, a pulse generator, an AND element, a counter, an OR element, an NOT element, the first trigger, and the output of the pulse generator is connected to the first input of the AND element whose output is connected to the counting input of the counter. are information outputs of the device and are connected to the address inputs of a multiplexer, information inputs (which are connected to the outputs of the keyboard group, the output of which is connected to the first input of the OR element, whose output is connected to the reset input of the first trigger, the input of which the URICH device is connected to the output of the element NOT, the input of which is connected to, the output of the multiplexer and the second input of the element OR, characterized in that 5, the second trigger, a comparison element, a shift register and a register whose information inputs are soy are entered into it: all the time with the counter outputs and the first group of inputs, the comparison element, the outputs of the register are connected to the second group of inputs of the comparison element, and the clock the input is connected to the first output of the shift register, the clock input of which is connected to the inverse output of the first trigger, the information input is connected to the bus of the logical unit of the device, the reset input is connected to the second input of the element Both the inverse output of the second trigger and the second output are connected to the clock input of the second trigger, the reset input of which is connected to the output of the HE element, the direct output of the second trigger is connected to the control input of the reference element, the equality output of which is connected to the device readiness output, and output inequality - with the output fault device. 0 five 0