SU1188764A1 - Information input-output device - Google Patents

Description

The invention relates to computing and can be applied to keypads for entering information.

The purpose of the invention is to increase the reliability of the device by limiting the message length.

FIG. 1 shows a functional diagram of the device input / output information; in fig. 2 is a functional diagram of a write signal generator.

The diagram shows the keyboard 1, the encoder 2, the first and second registers 3 and 4, the code converter 5, the keys 6, the indicator 7, the first and second counters 8 and 9, the writing signal shaper 10, the first decoder 11, the comparison element 12, from the first the third one triggers 13-15, first to third elements AND 16-18, element OR 19, delay element 20, one-shot 21, control key 22, device 23 output, control input 24, reset input 25.

The recording signal former (Fig. 2) contains a second decoder 26, a group of elements And 27.

Keyboard 1 is intended for typing information and can be performed on PKBZ-3 buttons, PC or the like.

The code converter 5 serves to convert the position code of the characters of keyboard 1 into a parallel binary code corresponding to the type of indicators used, and can be performed on combinational circuits of the 133,564 series

Register 3 serves to store the dial message and can be performed on RS-type flip-flops of series 133,564.

Register 4 is designed to store information converted to a binary code corresponding to the type of indicators used, and can be performed on RS-type triggers of the 133.564 series.

The keys 6 are intended for switching the segments of the characterizing indicators and can be performed on transistors connected according to a common emitter circuit with resistors included in the main and collector circuits.

Indicator 7 can be performed on the sign-synthesizing indicator elements of the type IV-17.

Counters 8 and 9 can be implemented on chips 133IE5 or 133IE7, 564IE10, 564IE11.

Comparison element 12 can be performed on IC 564IP2.

Triggers 13, 14 and 15 are made on RS-type triggers.

A single vibrator 21 serves to form a short pulse on the front of the input signal.

The device works as follows.

In the initial state, the registers 3 and 4, the counters 8 and 9, the trigger 15 are set to the zero state by a signal on the bus

25 is reset. By successively pressing the buttons of the keyboard 1, a message is typed. When pressing the buttons of the keyboard 1, a parallel binary code according to GOST 13052-74 is generated at the first output of the encoder 2, arriving at the D inputs of the register 3, and a parallel binary code is generated at the output of the code converter 5, corresponding to the configuration of the signposts

 indicator elements of the indicator 7, arriving at the D-BKHODY register 4. At the same time at the second output of the encoder 2, a pulse signal of the presence of a code is received, coming through the element 16

5 to the C input of the counter 8 and through the delay element 20 to the gate input of a group of elements AND 27 of the write signal generator 10. According to the signals from the second output of the write signal generator 10 (the outputs of the group of elements AND 27), the information to be entered is sequentially recorded in the trigger group of register 3 and register 4. Information from the outputs of register 4 through the switching keys 6 is fed to indicator 7 and the segments of the sign-synthesizing indicator elements of indicator 7 are switched, and information being gathered is displayed on it.

When dialing the nth character, the information on the fourth output of the recording signal generator 10 (the nth output of the decoder 26) appears high level to the S-inputs of the trigger 13 and 14, and the signal of the presence of the code from the output of the delay element 20 sets the trigger 13 into one state, as a result of which the trigger 14 is also set to one state

5 and thus prohibits further passage of the code presence signals from the second output of the tamper 2 through the element 16 to the C input of the counter 8 and through the element 17 to the second input of the recording signal generator 10. Therefore, only the first n characters are recorded in registers 3 and 4 information. Thus, erroneous writing to registers 3 and 4, n + 1, etc. is prevented. signs of information, resulting in increased reliability of the information entered.

When an external device is ready to receive information, a high level is received at input 24. Key 22 is pressed to output information to an external device.

0, a pulse signal appears at the output of the one-shot 21; the trigger signal 15 is set to one when there is a high level at the third S input of the trigger 15, which comes from the third output of the signal conditioner

 records 10 (inverse zero output of the decoder 26), thereby preventing the launch of the information output path in the absence of typed information.

since the counter 8 is in the zero state and the zero signal from the inverse zero output of the decoder 26 prohibits the installation of the trigger 15 in the single state.

The signal from the output of the element And 18 is fed to the C input of the counter 9. The signals from the output of the decoder 11 allow the sequential output of information from the trigger group of register 3 to an external device when the signals are received sequentially at the input 24, which prohibits its information from the device. After outputting from the device m characters of information previously recorded in register 3, when the rn-f 1 signal arrives on the input bus 24, a signal appears in the zero state that registers 3 and 4, counters 8 and 9 , trigger 15. This concludes the process of outputting information from the device and is prepared for the recruitment of the next soobshen. Thus, the time for transmitting information to an external device depends on the number of characters written to register 3, which results in a decrease in the time of information exchange, unlike devices, where the time of information exchange is constant and determined by the maximum message format.

Compared to the prototype, the use of the proposed device allows to increase the reliability of operation by blocking the entry of information into the registers when an operator incorrectly dials a message on the keyboard of the device that exceeds the capacity of the register, prohibiting the launch of the path

information output in the absence of a previously typed message. In this case, blocking the input of information to the registers during the period of outputting information to an external device due to possible operator errors is reduced, the time for transmitting information to an external device is reduced due to the fact that this time depends on the number of characters recorded in the registers and at a variable value of the transmitted message on average, the time taken for the communication channel to an external device is reduced by 20–30%, in contrast to the device, where the time of information exchange is constant and is determined by the maximum format of the transmitted message no.

Claims (2)

) 57) 1. A DEVICE FOR INFORMATION I / O, containing a single-vibrator, encoder, decoder, first register, first counter and keyboard, the outputs of which are connected to the inputs of the encoder, the outputs of the first register are the outputs of the device, the outputs of the first counter are connected to the input of the first decoder, characterized in that, in order to increase the reliability of the device by limiting the length of the message, a second counter, a shaper of recording signals, a comparison element, the first, second and third triggers, the first, second and third elements are introduced into it you AND, OR element, delay element, control key, the output of which is connected through a single vibrator to the first input of the installation in “1” of the first trigger, the second input of the installation in “1”, which is connected to the first input of the first AND element and is the control input of the device, and the third input of the installation in “1” is connected to the first output of the shaper of the recording signals, the second output of which is connected to the clock input of the first register, the third output to the first input of the comparison element, the fourth output to the inputs of the installation to “0” and the first inputs of the installation to "one "Of the second and third triggers, the first output of the encoder is connected to the data input of the first register, and the second output is connected to the first input of the second element And and through the delay element with the second input of the installation in" 1 "of the second trigger and the first input of the third element And, the second input which is connected to the inverting output of the first trigger and the second input of the second element And, the third input of which is connected to the inverting output of the second trigger, the non-inverting output of which is connected to the second input of the installation in “1” of the third trigger, inverting whose output is connected to the third input of the third AND element, whose output is connected to the first input of the recording signal generator, the second input of which is connected to the output of the second counter, whose sync input is connected to the output of the second And element, and the installation input to “0” of the second counter is connected _β with the input of the reset of the first register, with the input <9 setting to "0" the first counter, the first trigger and the output of the OR element, the first input of which is the input of the installation of the device, and the second input of the OR element is connected to the output of the compare eniya, the second input of which is connected to the output of the first counter, the output of the decoder is connected to a control input of the first register, output of the first AND element is connected to the clock terminal of the first counter, the second input of the first AND element is connected to the noninverting output of the first flip-flop. 2. The device according to π. 1 characterized in that the shaper of the recording signals contains a second decoder and a group of elements And, one of the inputs and outputs of which are the first input and the second output of the shaper, and the other inputs are connected to the outputs of the second decoder and are the fourth output of the shaper, one and the other outputs of the second decoder are the first and third outputs of the shaper, the input of the second decoder is the second input of the shaper.