SU1150624A1 - Information input device - Google Patents

Abstract

A DEVICE FOR ENTERING INFORMATION containing a keyboard, first and second encoders, first and second pulse drivers, a trigger, a first AND element and a register whose outputs are device information outputs, the first keyboard output connected to the input of a second keyboard generator, the outputs of the first keyboard group are connected with the inputs of the second pshfratora, the outputs of which are connected to the inputs of the group of the second pulse shaper, the output of which is connected to the second inputs of the trigger, register and the first element And, o the first input of the first element I is connected to the first input of the register, the trigger output and the second input of the first pulse shaper, the output of which is the second controlling output of the device, the second keyboard output is connected to the common wire of the device, the third The keypad is connected to the first input of the first pulse generator, the outputs of the second keyboard group are connected to the inputs of the first encoder, the outputs of which are connected to the inputs of the first form group pulse bodies, the inputs of the first and second groups of the register are connected respectively to the i outputs of the first and second cipherto (L dv, different in that, in order to increase the reliability of the device, the second AND element, the OR element, the NOT element and the counter, the output of which is connected to the second input of the second element I, the output of which is connected to the first input of the trigger, the output of the second form of the pulse generator is connected to the first input of the AU element and the second input of the counter, the first input of the counter is connected to the output of the element NO, the 4th input It is connected to the second input of the OR element and is the input to the device.

Description

The invention relates to computing and can be used in devices for entering information into a computer. A device for entering information5 is known that contains a matrix keyboard, a multiplexer, a decoder, a counter, first, second and third triggers, first and second pulse generators, first and second elements, And l. It is also known an information input device comprising a matrix of switching elements, low-order encoders, a high-order encoder and the first pulse shaper, the group inputs of which are connected to the outputs of the low-position encoder, the inputs of which are connected to the vertical buses of the matrix of switching elements, first the vertical bus of which is connected to the first input of the first pulse generator, and the second vertical bus is a tire of zero potential, the horizontal tires of the group are connected Higher bit encoder inputs, as well as a trigger, a second pulse driver, an AND element and a register, the first input of which is connected to the first input of the AND element of the trigger output and the first input of the first pulse shaper, whose output is the first output of the device, the second trigger input connected to the output of the second pulse generator, the first input of which is connected to the first horizontal bus of the matrix of switching elements; the inputs of the register group are connected to the outputs of the lower-order encoder; ra high bits and the second group of inputs of the pulse shaper outputs of register group is -yuts device outputs d Known devices are characterized with low reliability due hydrochloric lack of synchronization of the device with an external device to readily receive information. At the output register of these devices, information is reset, regardless of whether or not the information is received by an external device, and it is also possible to re-enter information into an external device if the switching element is pressed for a long time. This leads to a distortion of the input information. . The purpose of the invention is to improve the reliability of a device by synchronizing its operation with an external device. The goal is achieved by the fact that in a device for inputting information comprising a keyboard, first and second encoders, first and second pulse drivers, a trigger, the first AND element and a register, whose outputs are information outputs of the device, the first keyboard output is connected to the second driver input. pulses, the outputs of the first keyboard group are connected to the inputs of the second encoder, the outputs of which are connected to the inputs of the group of the second pulse generator, the output of which is connected to the second inputs of the trigger a, the register and the first element AND whose output is the first control output of the device, the first input of the first element I is connected to the first input of the register, the output of the trigger and the second input of the first pulse shaper, the output of which is the second control output of the device, the second output keyboard is connected to the common wire of the device, the third keyboard output is connected to the first input of the first pulse shaper, the outputs of the second keyboard group are connected to the inputs of the first encoder, the outputs of which are connected to the inputs of the group of the first pulse generator, the inputs of the first and second register groups are connected respectively to the outputs of the first and second encoders, a second AND element, an IL element, an NOT element and a counter, whose output is connected to the second input of the second AND element, whose output is connected to the first the trigger input, the pulse driver output is connected to the first input of the OR element and the second counter input, the first counter input is connected to the output of the HE element, whose input is connected to the second input of the OR element and Input device. FIG. t is represented by the structure of the device; in FIG. 2 Belt diagram of the device.

3

The device for entering information contains a keyboard 1, the first encoder 2, the first driver 3 pulses, the second encoder 4, the second driver 5 pulses, trigger 6, register 7, first element 8 AND, element 9 OR, element 10 NOT, counter 11, second element 12 And, the control input of device 13.

In the timing diagram (Fig. 2), the following designations are accepted: F5 signal coming from the driver 5 pulses; OR 9 - the signal coming from the element OR 9; FZ - the signal from the imager 3; Q 6 is the signal coming from the inverse output of trigger 6; 13 is a signal arriving at the bus 13 of the external device state; And 8 - the signal coming from the element And 8; SC 11 signal from counter 11; And 12 - the signal from the element And 12; WG7 - signal received from register 7,

The device works following cim. in a way.

In the initial state, the switching elements of the keyboard 1 are turned off and the signal O is received from the external device at input 13. At the output of Shaper 5, there is a signal O which sets the level 1 at the inverse output of counter 11, and at the output of shaper 3 - signal 1. These signals are set to a single state trigger 6, the signal from the inverse output of which is reset register 7, the operation of the element 8 AND is prohibited and the operation of the driver 3 is resolved.

When you press one of the switching elements of the keyboard, whose code in the higher and lower bits is different from zero, the binary codes are generated by the encoders 2 and A, which are fed to the information inputs of the register 7 and to the inputs of the thermometers 3 and 5. At the output of the imaging unit 5, the signal 1 is generated which through the elements 9 OR and 12 AND is fed to the input of the trigger 6. At the output of the imaging unit 3, a negative polarity pulse is generated, which records the E1 order in the register 7 and triggers the trigger 6, and the output signal of the imaging unit 3 ts only when touched pereklyuchak CIM contact normally razomk

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contact, and the duration of this signal is determined by the duration of the transition processes in the trigger 6 and the former 3.

5 The reset signal of register 7 is removed before the signal of entering information into register 7 ends, for the time of transient processes in shaper 3, which is sufficient for entering information into register 7 and ending transients in register 7. Moreover, after switching the trigger 6, further bounce does not occur affecting the operation of the device 5, since the trigger 6 blocks the driver 3 and the input of the register 7. After the negative pulse at the output of the driver 3 ends, the output of element 8 and appears

20 signal availability information in the register 7.

An external device (not shown in Fig. 1) analyzes the signal from the output of element 8 AND, and, if it is ready

25 to receive information from register 7, sets at input 13 a signal 1. Receiver readiness (GP), together with the fact that the external device has started to receive information. This

0, the signal is posted to circuit 9 OR, holding at its output signal G until the termination of the signal from the MS. Due to this, information from the register is not removed until the end of the reception.

 by an external device, even if the release of the switching element of the keyboard 1 occurs before the termination of the HH signal. When a signal is received by the GP and continues to press one

0 switching elements of the keyboard (opening the switching element) does not change the state of the element 9 OR and the counter 11, therefore, from the output of the element 12 AND on

 trigger input 6 continues to receive signal 1. Thus, the information recorded in register 7 does not change.

When the signal of the signal launcher ceases, which indicates the transfer of information from register 7 to an external device, a signal arrives at the counting input of counter 11, which translates it into the opposite state, the output of element 12 appears and the signal O appears, which translates the trigger 6 to zero state. The inverted output of the trigger 6 delivers a signal to erase the information in the register 7, the ac output of the element 8 and the HPO signal to the external device stops flowing. Thus, the possibility of re-entering the GP signal is eliminated and the repeated input to the external device of information is prohibited when the keyboard switching element is continuously pressed, i.e. synchronization of the operation of the device for inputting information with readiness of the external device to receive information is provided. If during the time of the switching of the switching element to the input 13 the signal of the mainframe did not come from the external device, the device returns to its initial state when the switching element is opened. If the switching element is pressed, the code of which is equal to O in the higher or lower order bits, then the device works in a similar way, only the corresponding skinny encoder does not participate in the work, and the pulse shapers are triggered by signals coming directly from the switch contacts. The proposed device prevents the distortion of information inputted to an external device if the switching element is opened before the external device completes the reception of information, since information is stored on register 7 and the ready signal is removed at the output of element 8 and the ready signal is removed from input 13 external device. The proposed device also eliminates the possibility of several times entering the same information by long pressing the switching element, in which the prototype keeps the code of the pressed switching element on the output register 7 and the source readiness signal, while in the proposed device immediately after the termination the input 13 of the readiness signal of the external device, the counter 11 goes to the zero state, causing the appearance of a zero level at the output of the element 12 And, which, in turn, causes a reset to be reset 6, removing the ready signal from the output of element 8 I and erasing information from the register 7. This ensures high reliability of information input to the external device due to synchronization of the device with the readiness of the external device to receive information. .. U / tfua omeshmego. / J ycmflffufmStt FIGL tf tutff EI fodfiffe

FIG. 2

Claims (1)

INFORMATION INPUT DEVICE, comprising a keyboard, first and second encoders, first and second pulse shapers, a trigger, a first AND element and a register whose outputs are information outputs of the device, the first keyboard output is connected to the input of the second pulse shaper, the outputs of the first keyboard group are connected to the inputs of the second encoder, the outputs of which are connected to the inputs of the group of the second pulse shaper, the output of which is connected to the second inputs of the trigger, register and the first element And, the output of which is the first control output of the device, the first input of the first element AND is connected to the first input of the register, the trigger output and the second input of the first pulse shaper, the output of which is the second control output of the device, the second keyboard output is connected to the device common wire, the third keyboard output is connected to the first the input of the first pulse shaper, the outputs of the second keyboard group are connected to the inputs of the first encoder, the outputs of which are connected to the inputs of the group of the first pulse shaper, the inputs of the first and second groups of the register are connected, respectively, with the outputs of the first and second encoders, excellent. which, in order to increase the reliability of the device, a second AND element, an OR element, an NOT element and a counter, the output of which is connected to the second input of the second And element, the output of which is connected to the first input of the trigger, are inserted into it, the output of the second pulse shaper is connected to the first input of the OR element and the second input of the counter, the first input of the counter is connected to the output of the element NOT, the input of which is connected to the second input of the OR element and is the input of the device.