SU1493998A1 - Device for data input - 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 improve the speed of the device. The device contains a keyboard 1, made in the form of switching elements, including moving, normally open and normally closed contacts, multiplexer 2, 3 pulse generator, counter 4, elements AND 5, OR 6, HE 7, trigger 8, and the first 11 and second 12 elements AND-NAND and register 13. The invention allows to increase the speed of input of repeating information by organizing automatic repeated input of information. 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, due to the organization of an automatic multiple input mode.

The drawing shows the block diagram of the device for entering information

The device contains a keyboard 1, made in the form of switching elements, including moving, normal and open and normally closed contacts, multiplexer 2, generator 3 pulses, counter 4, element 5, element OR 6, element 7, trigger 8, outputs 9 of the device, input mode 10 of the device, the first II and second 12 elements AND-NOT and register 13, the output 14 of the device.

The device works as follows.

In the initial state, when none of the keys of the keyboard 1 is pressed, all selectable inputs of multiplexer 2 have logical O, on its output is logical 1, holding through the element NOT 7 the level of logical O on the setting input trigger 8 in one state this logical 1 from direct

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When the moving contact reaches the normally open contact of the keys at the second input of the element OR 6, a logical O appears, which at the same level at its first input (from the output of multiplexer 2) enters the reset input of trigger 8, sets it to the zero state. In this case, a logical O, from the direct output of the trigger 8, will prohibit the passage of clock pulses from generator 3 through the first AND-HEY 11 element to the control input of register 13, prohibiting the caMbfM from further overwriting the code combinations from the outputs of the counter 4, m. e. fixing on the outputs of the register 13 and, therefore, on the outputs 9 of the device group, the code combination corresponding to the number of the pressed key. Logic 1 from the inverse output of the trigger 8 through the element AND 5, at the second input of which there is a logical 1 from the output of the second element AND-NOT 12, enters the output 14 of the device and allows polling of moves 9 of the device group.

When the moving contact returns to the normally closed Keypad 1 contact, the appearance of logical 1 at the output of multiplexer 2 will set the circuit to its initial state,

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the trigger output 8 permits the passage of any character input to the control input of the register 13, in which the level of the first half-cycle of the clock frequency of the generator of 3 pulses (relative to the level difference at which counter 4 is triggered) is rewritten sequentially occurring at the outputs of counter 4 2 code combinations. At the input 10 of the device there is a logical O.

When you press any key of the keyboard 1 (in the input mode of non-repeating information characters), the automatically selectable input of the multiplexer 2 is given a logical input. At the moment when the code corresponding to the number of the key pressed is set at the output of binary counter 4, and consequently, at the output of register 13, logical O appears at the output of the multiplexer 2, and logical 1 , not changing trigger state 8.

At input 10 of the device, logical 1 is applied, which allows the passage of pulses from one of the outputs of counter 4 (the choice of output depends on the required or acceptable symbol repetition frequency) to the second input of element 5. Therefore, after pressing any key on the keyboard 1 and setting trigger 8 to the zero state, the logical I from its inverse output permits the passage of pulses from the output of the second element K-HE 12 through the element K S to the output 14 of the device, thereby gating the repeated combination of code combinations from the outputs 9, device groups.

Thus, the device allows you to increase the speed of inputting repeated information symbols by organizing automatic repetition of input commands, and IITO simultaneously increases the service life of the keyboard.

Claims (1)

Formula invented shadows Information input device containing keyboard, multiplexer, pulse generator, counter, OR element, AND element, NOT element, trigger, keyboard group outputs are connected to multiplexer information inputs, the output of which is connected to the element input and the first input of the OR element, second input which is connected to the keyboard output, the element output is NOT connected to the trigger setup input, the reset input of which is connected to the output of the OR element, characterized in that, in order to increase the speed of the device by organizing automatic entry mode, the first and second elements of the NAND and re are entered into the device. the gist, the outputs of which are connected to the address inputs of the multiplexer and are informational outputs of the device, the output of the pulse generator is connected to the input of the counter and the right input of the first element AND. , the inverse output of the trigger is connected to the first input of the element AND, the output of which is the gate output of the device, the direct output of the trigger is connected to the second input of the first element NAND, the first input of the second element It is the AND-device is an input mode, the second input of second AND-NO soediien with one of the outputs of the counter, and an output - to a second input of the I.