SU1449983A1 - Information input device - Google Patents

Description

The invention relates to computing technology and can be used to input and output information.

The purpose of the invention is to expand the functional possibilities due to the organization of the regime between remote customers.

The drawing shows the structure of the device.

The device contains a generator of 1 mplus, counter. 2, the first element And 3, multiplexer 4, keyboard 5, even trigger 6, second 7 and third 8 elements And element 9, first 10 and second 11 elements OR, first 12 and second 13 inverters, pulse shaper 14, transceiver 15, device sync input-output I6, device information outputs 17, device strobe information output 18.

The device works as follows.

Two-way data exchange can be carried out with a device, such as an interface computer module, made according to a similar scheme. When the device is put into operation, its initial synchronization is performed. For this, at the output of the driver 14, a logical I pulse is generated in accordance with the clock signal from input / output 16 through the transceiver 15. pulse is set to O of trigger 6, as well as through the first element OR 10 to install in O of pulse 1, trigger 6 and counter 2 code combination.

In the absence of a zero signal at the input-output 16, pulses from the output of the generator 1 are fed to the counting input of counter 2. If the counting state of the counting trigger is zero, information can be received. The signal that triggers the reception of information is a zero signal at the input-output 6 of the transceiver 15, formed by the device for entering and exiting the Information Information, working in conjunction with the one under consideration. This signal is caused by the appearance at the output of the transceiver 15 of the logical 1 level, as a result of which the output of the NAND element 9 is set to the logical 0 signal,

 which blocks the passage of the generator 1 pulses.

The state of counter 2 corresponds to the received code. With the disappearance of the zero potential at the input-output 10 of synchronization, the operation of the device continues.

When appearing at all outputs

counter 2 logical 1, a signal of logical 1 is generated at the output of the first element FROM, at the output of the second element And 7 also a signal of logical I is formed, as a result

on ; A sync pulse is generated at the input-output 16 of the device synchronization. This impulse, arriving at the device working together with the contemplated one, causes the synchronization of the pulse generator 1, the installation in O, the counter 2 by a logic signal, formed by the third element I 8 and the first element SH 10. The installation in O the counter 2,

the information receiver is produced earlier by the value of the period of the pulses of the generator I, thereby achieving reliability of the input-output device

information.

The information is transmitted in a single state of the counting trigger 6, in this case, when the keyboard element 5 is closed, when the counter 2 is set to the corresponding state at the output of the multiplexer 4, a logical 1 signal appears, which causes the appearance of a zero potential at the input-output 16 sync

device and logical 1 at the output of the transceiver 15, as a result of which the receipt of pulses from the output of the generator 1 is blocked, similarly to the case of receiving information. State

counter 2 corresponds to the transmitted code. The operation of the device is resumed when the element of the keyboard 5 is opened. After the counting trigger 6 is thrown over, the cycle repeats.

The proposed device for inputting the formation of the formation is easy to manufacture and set up.

The device can be made on integrated circuits any

series, having the required set of functional elements.

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Claims (1)

INFORMATION INPUT DEVICE, comprising a keyboard, a counter, the outputs of which are connected to the address inputs of the multiplexer, the information inputs of which are connected to the outputs of the keyboard, a pulse generator, the output of which is connected to the counter input of the counter, and I mean that, in order to expand the functionality of the device by organizing the exchange mode between remote users, a counting trigger has been introduced into it, the counting input of which is connected to the output of the highest level of the counter, the first, second and third thium elements AND, AND-element, the output of which is connected to the output of the Resolution of the pulse generator and is the output of the StrO-information of the device, the first and second OR elements, the first and second inverters, a pulse shaper and a transceiver, the output of which is connected to the first input of the third , the first input of the AND-NOT element and the input of the pulse shaper, the output of which is connected to the first input of the first OR element and the reset input of the counting trigger, the output of the first OR element is connected to the synchronization inputs of the generator and reset and the counter, the direct output of the trigger is connected to the second input of the third element And and through the first inverter to the first input of the second element And is the output Enable the device information, the inverse output of the trigger is connected to the keyboard input, the outputs of the counter are connected to the inputs of the first element And are information outputs of the device, the output of the first element And is connected to the third input of the second element And, the third input of the third element And and through the second inverter with the second input of the element AND NOT, the output of the generator of impulses cos coupled to a second input of the second AND gate, whose output is connected to a first input of a second OR gate, a second input and whose output is connected respectively to the output multiplexer and the input of the transceiver, the input-output is input-output devices synchronize.