SU1478204A1 - Data input unit - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to manually enter information into a computer. The purpose of the invention is to expand the field of application by providing information input by simultaneously pressing several switching elements. The device contains a block of 1 switching elements, a decoder 2, two counters 3, 11, a pulse generator 4, three elements AND 5, 8, 10, two triggers 6, 7, element 9, switch 12, element OR 13. Interrogation of unit 1 switching elements begin after the start signal arrives at the trigger input 7. After all the switching elements (one cycle) have been polled, the device returns to its original state. The codes of all closed switching elements are successively fixed in counters 3 and 11; upon detection of a closed switching element, a control signal is generated at the output of switch 12. The device allows for one scan cycle to transmit information about all simultaneously pressed keys of block 1. 1 Il.

Description

The invention relates to automation and computer technology and can be used to organize manual input of information into control or computer systems.

The purpose of the invention is the expansion of the scope by ensuring the input of information by simultaneously pressing several switching elements.

The drawing shows a functional diagram of the device.

The device comprises a unit 1 of switching elements, a decoder 2, 15 a second counter 3, a pulse generator 4, a first element And 5, a second trigger 6, a first trigger 7, a second element And 8, an element NOT 9, a third element And 10, the first counter 11, switch 20 and element OR 13.

The device operates as follows.

In the initial state, trigger 7 is in the enable state, and 25 trigger 6 is in the prohibit state. Entering information begins after switching the elements of block 1 and the start signal. The pulses from the output of the generator ° 4 through the elements And 5 and 10 go 30 to the input of the counter 3, causing changes in its state. The outputs of the decoder 2 appear signals that are sequentially fed to the vertical buses of block 1 switching 35 elements. When one of the elements is closed, the signal from the output of the decoder 2 through the OR 13 element is fed to the input of the trigger 6 and causes it to go into the enable state, therefore, 40 clock pulses from the output of the generator 4 begin to flow through the And 8 element to the input of the counter 11 and , start coming to the input of counter 3, the code of which by this time is 45 ^ a meter of the vertical bus of the switching element block 1, in which the closed element is located, since under the influence of the signal from the output of trigger 6 through the element NOT 9, the element And 10 is closed.

Changing the states of the counter 11 causes the switch 12 to be connected in series to the horizontal buses of the block 1 of the switching elements until a bus with a closed element is connected. At this moment in time, a signal appears at the output of the switch 12, under the influence of which the current state of the counters 11 and 3 is read, which corresponds to the number of the closed switching element. Under the influence of the signal at the output of the overflow of the counter 11, it is reset, and the trigger 6 goes into a forbidden 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. Upon detection of the next closed element of the block 1 of the switching elements, the sequence of operation of the elements of the device is repeated. Under the influence of the signal at the output of the overflow of the counter 3, it is reset, and the trigger 7 goes into the inhibit state.

The start signal can be given immediately after the end of the cycle of the device.

The proposed device has a simple functioning algorithm for the sequential generation of codes of all closed switching elements.

Claims (1)

Claim A device for inputting information containing a block of switching elements, a pulse generator, first and second counters, a switch, first and second triggers, first, second and third elements AND, information outputs of the first counter are connected to the address inputs of the switch, the installation input to 1 of the first trigger is the start input of the device, the output of the pulse generator is connected to the first inputs of the first and second elements And, the output of the second element And is connected to the input of the first counter, the outputs of the block of switching elements are connected s with the information inputs of the switch, the outputs of the first and second triggers are connected respectively to the second inputs of the first and second elements AND, the information outputs of the counters are the information outputs of the device, which is important in order to expand applications by providing input of information by simultaneously pressing several switching elements, a decoder, an OR element, an NOT element are introduced into the device, the output of the second trigger is connected to the input of the element NOT, the output of which is connected to the first input of the third AND element, whose output is connected to the input of the second counter, the transfer output of which $ is connected to the setting input 0 of the first trigger, the output of the first AND element is connected to the second input of the third AND element, the inputs of the block of switching elements are connected with the outputs of the decoder, the inputs of which are connected to the information outputs of the second counter, the outputs of the block of switching elements are connected to the inputs of the OR element, the output of which is connected to the installation input of 1 of the second trigger , the overflow output of the first counter is connected to the input of the installation at 0 of the second trigger, the output of the switch is the control output of the device.