SU1376077A1 - 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 speed of the device. The device for entering information contains a keyboard 1, multiplexers 2 and 11, the element NOT 3, the element OR 4, the RS flip-flop 5, the element AND 6, the pulse generator 7, the counter 8, the group of elements NOT 12, the element OR-NOT 13, the groups of elements And 14 and 15, a group of elements OR 16. Accelerated search for the pressed switching element of the keyboard 1 is organized by counter-scanning the keyboard 1 using the second multiplexer 11 and the group of elements NOT 12. 1 Il.

Description

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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 speed of the device.

The drawing shows the proposed device.

The device for entering information contains a keyboard 1, made in the form of switching elements containing movable normally closed and normally open contacts, the first multiplexer 2, the element KES, the element OR 4 ,. RS flip-flop 5, element 6, pulse generator 7, counter 8, gate output device 9, device information outputs 10, second multiplexer 11, group of elements NOT 12, element OR-HE 13, first 14 and second 15 groups of elements AND , a group of elements OR 16.

The information input device operates as follows.

In the initial state, when none of the keyboard 1 keys are pressed, all selectable inputs of the first 2 and second 11 multiplexers contain logical O arriving at their outputs, respectively, at the output of the element OR NOT 13 — logical 1, at the output of the element NOT 3 - logical O, holding at the direct output of RS-flip-flop 5 logical 1, allowing clock pulses from the output of the generator 7 pulses through the element 6 to the input of the counter 8, at the output of which a sequence of codes appears and 12 - x inversion.

When you press any key of the keyboard 1, the corresponding selectable inputs of the first 2 and second 11 multiplexers receive lo

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The moving contact of the normally open contact of the key on the second input of the element OR 4 is logical O. The controller at the first input of the element OR 4 logical O from the output of the first 2 or second 11 multiplexers, the output of the counter 8 is the code (the output of the elements is NOT 12 - its inversion), corresponding to the number of the pressed key, at the output of the element OR 4, a logical O sets in on the R-input of the RS flip-flop 5 at its direct output logical O, and in the inverse - logical.

Logic O from the direct output; RS-flip-flop 5 will prohibit the passage of clock pulses from the output of the generator of generator 7 through element 6 to the input of binary counter 8. Occurred at the output of the first 2 or second 11 multiplexer logical 1 permits the passage respectively through the first 14 or second 15 group of elements And respectively (from the outputs of the counter 8) or the inverse code value (from the outputs of the elements NOT 12 groups) then through the group of elements OR 16 to the output buses of the device 10. At the same time, logical 1 on the inverse output of the RS flip-flop 5 is fed to output 9 of the code strobe and razr Enables polling for output of 10 bits of code.

When the moving contact returns to the normally closed keyboard key 1 contact, the login of the output of the first 2 or multiplexers appears, and the next

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preferably, the logical O at the output of the HE 3 element (to the S input of the RS flip-flop 5) will set the circuit to its initial state. Organizing a counter poll of the keyboard makes it possible to double the speed of the device.

physical

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At the point in time when the output of binary counter 8 or the output of the elements of NOT 12 group will have a code corresponding to the number of the key pressed, the output of the first 2 or second 11 multiplexers in logic levels 1, respectively, at the output of the element OR NOT 13 - logical O, at the output of the NOT 3 element - logical 1, without changing, the states of the RS flip-flop 5. When reaching

Claims (1)

Invention Formula A device for entering information containing a keyboard, first multiplexer, pulse generator, AND element, counter, OR element, NOT element, RS flip-flop, pulse code code connected to the first input of the AND element, the output of which is connected to the counter input, the outputs of which are connected to address inputs of the first multiplexer, the information inputs of which are connected to the outputs of the group keyboard, the output of which is connected to the first input of the OR element, the output of which is connected to the R-input of the RS flip-flop, the S-input of which is connected to the output of the element NOT, the inverse output of the RS flip-flop is the gate output of the device, and the direct output RS -trigger is connected to the second input of the AND element, which differs from the fact that, in order to increase the speed of the device, the second multiplexer, the W-NOT, the NO group, the first and the second AND group, and the OR are informational outputs the multiplexer outputs are connected to the inputs of the element OR NOT, the output of which is connected to the input of the NOT element and the second input of the OR element, the counter outputs are connected to the inputs of the NOT elements of the group and the first inputs of the corresponding AND elements of the first group, the second inputs of which are connected to the output of the first multiplexer, the outputs of the NOT elements of the group are connected to the address inputs of the second multiplexer and the first inputs of the corresponding elements AND of the second group, the second inputs of which are connected to the output of the second multiplexer, whose information inputs are connected to the outputs of the keyboard group, Exit elements and groups connected to the inputs of the corresponding element or group.