SU1485224A1 - Data input unit - Google Patents

Description

The invention relates to computing, in particular to devices for entering information into various digital devices. purpose

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inventions - improving the speed of the device. The device consists of a block 1 of switching elements, a decoder 2, the first counter 3, a pulse generator 4, the first element 5, the first 6 and second 7 triggers, the second element 8 and 8, the first element 9, the third element 10, the second counter 11, the switch 12, the element OR 13, the second element NOT 14, the fourth 15, the fifth 16 and the sixth 17 elements I. The device allows you to enter information from several keys pressed simultaneously. 1 il.

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The invention relates to computing and is intended to enter information into digital devices.

The aim of the invention is to increase the speed of the device.

The drawing shows a structural electrical circuit of the device.

The device consists of a block 1 switching elements, a decoder 2, the first counter 3, the pulse generator 4, the first element 5, the first trigger 6, the second trigger 7, the second element 8, the first element 9, the third element 10, the second counter 11 , the switch 12, the element OR 13, the second element is NOT 14, the fourth element And 15, the fifth element And TB, the sixth element And 17.

The device works as follows.

In the initial state, the triggers 6 and 7 are. in prohibitory state, the external device is ready to receive information.

After clicking the "Start" button, the trigger 7 is transferred to the enabling state. The pulses from the input of the generator 4 through the elements And 5 and 10 are fed to the input of the counter 3, causing a change in its state. The outputs of the decoder 2 signals appear, which are sequentially fed to the vertical bus of the block 1 switching elements. In the presence of a closed one of the elements in block 1 of the switching "elements, the signal from the output of the decoder 2 through the element OR 13 enters the first input of the trigger 6 and translates it into the enabling state, therefore the clock pulses from the output of the generator 4 begin to flow through the elements 8 and 15 the input of the counter 11 and cease to arrive at the input of the counter 3, the code of which by this time is equal to the number of the vertical bus of the block 1 of switching elements, in which there is a closed element, since under the influence of the signal from the output of the trigger 6 through lement 9 NOT AND gate 10 is closed.

Changing the states of the counter 11 causes a serial connection of the switch 12 to the horizontal buses of the switching unit block 1, until it connects

bus with a closed element. After connecting the bus with a closed element at the output of the switch 12, a signal appears, under the influence of which the external device generates a "Stop" signal, which enters through the element NOT 14 at the input of the element 15, from the output of which the pulses at the input of the counter 11 cease to arrive. reading the values of counters 3 and 11. If any failure occurred while reading information in the external device, then there is the possibility of re-entering information (the values of counters 3 and 11). After receiving the information, the external device removes the "Stop" signal from the input of the element 14 and the pulses continue to flow through the element 15 to the input of the counter 11.

After filling the counter 11, the signal from its overflow output goes to the element AND 16, and in the absence of the Stop signal from an external device at the input of the element NOT 14, the next pulse from the output of the generator 4, passing through the element 16, resets the counter 11 and causes the trigger 6 in a prohibitive state. Clock pulses from the output of the generator 4 begin to flow to the input of the counter 3 and cease to flow to the input of the counter 11. When the next closed unit of the switching elements 1 is detected, the sequence of operation of the device elements is repeated.

When counter 3 is filled, the signal from its overflow output goes to element 17, and if there is a stop signal from an external device, the next pulse from generator 4 output, passing through element 17, resets counter 11 and triggers trigger 7 to the inhibit state.

The device has increased reliability and speed due to synchronization of work with an external device and the possibility of sequential generation of codes of all closed elements.

Claims (1)

Claim Device for entering information; containing the pulse generator, the first and second elements And, the first and 5 1485224 · θ the second counters, the first and second triggers, a decoder, a block of switching elements, a switch and an OR element, the generator output is connected to the first inputs of the first and second elements AND, the first input of the second trigger is a device start input, the output of the second trigger is , the output of the first trigger is connected to the V / O input of the second element I, the information outputs of the first counter are connected to the inputs of the decoder, the outputs of which are connected to the inputs of the switching elements block whose outputs go connected to the inputs of the OR element and information inputs of the switch, the address inputs of which are connected to the information outputs of the second counter, "the fact that, in order to improve the performance of the device, the third, fourth, fifth and sixth elements of AND 25 and the first and second elements are NOT, the first input of the third element is And is connected to the output of the first element And, and the second - with the output of the first element is NOT, the input of which is connected to the output the first trigger, the output of the third element AND is connected to the counting input of the first counter and the second input of the neck of that element AND and the input of the second element.5 is NOT the stop input of the device, and its output is connected to the second input of the fourth and third inputs of the fifth and sixth elements AND The first input of the fourth element I is connected to the output of the second element I, and its output to the counting input of the second counter, the output of the fifth element I connected to the second input of the first trigger and the reset input of the second counter, the first input of the fifth element I connect not connected with the overflow output of the second counter, the output of the OR element is connected to the first input of the first trigger, the second input of the second trigger is connected to the reset input of the first counter and the output of the sixth And element, the first input of which is connected to the overflow output of the first connected to the output of the pulse generator, the switch output is the gate output of the device.