SU1615697A2 - Data input device - Google Patents

Abstract

The invention relates to automation and computing, can be used to manually enter information. The aim of the invention is to improve the speed of the device. The device for entering information contains a keyboard 1, a multiplexer 2, a group of multiplexers 14, a pulse generator 3, two elements AND 4 and 15, a register 11, a group of registers 13, two triggers 8 and 12, a counter 5, a element NOT 7, an element OR 6, switches 16. In the device, it is possible to memorize the codes of the last pressed keys generated at the device outputs 9 and retrieve them from the registers 13 without scanning the keyboard 1 by setting the corresponding codes in the counter 5. 1 Il.

Description

The invention relates to automation—: ke and computer engineering, can I be used for manual input of: information into processing devices, and $ is an improvement of the device—: devices by ed. St., No. 1112358,

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

The drawing shows a structural diagram of a device.

The information input device comprises a keyboard 1, a multiplexer 2, a pulse generator 3, a first AND 4 element, a counter 5, an OR element 6, a 15 HE 7 element, a first trigger 8, device group outputs 9, device strobe output 10, shift register 11, the second trigger .12, the group of registers 13, the group of multiplexers 14, the second 20 element And 15 and the switches 16.

The device operates as follows.

In the initial state, when no key of the keyboard I is pressed, 25 shift register 11, the second trigger 12 and the group of registers 13 are reset, at all selectable inputs of multiplexer 2 and group of multiplexers 14 there are logical 0, and at 3Q their outputs are logical 1, which, in the first case, through the element HE 7 are already held at the logical O level, hold logic 0 on the inverse output of the first trigger 8, and logic 1 on the direct output, which goes to the second input of the first element And 4, 1a in the second case through the second cop And 15 enter the input permissions to enter the counter code 5 Logical 1 at the second input of the first Element And 4 allows the passage of clock pulses from the output of the 3 pulse generator through the first element 4 to the input of the counter 5, the output of which 2 ^P Codes appears sequentially. When you press any key of the keyboard 1 to the corresponding — the input of multiplexer 2 and multiplexer group 14 being input, Logical ”1” is given. At the time when the code corresponding to the number of the pressed key is generated at the output of binary counter 5, the output of multiplexer 2 appears logical 'Oh, and at the output of the element NOT 7 - logical 1, which does not change the state of the First trigger 8, When the Mobile contact reaches the normally bent contact of the key at the second input of OR 6, logical 0 appears. If the code corresponding to the number of the pressed key is generated at the output of counter 5, the logical 0 appears at the output of the OR element 6, which sets the logic input at the R-input of the first trigger 8 to its direct output 0, and on the inverse - logical `` 1 * ''. Logical “О” from the direct output of the first trigger 8 prohibits the passage of clock pulses from the output of the generator 3 through the first element AND 4 to the input of the binary counter 5. At the same time, the shift register 11 and the second trigger 12 are in the reset state (reset circuits are not shown), when this at the D-input of the register 11 of the shift there is a logical "1 from the inverse output of the second trigger 12. Thus, the front of the unit level that occurs on the inverse output of the first trigger 8 blocks the group of multiplexers 14, arriving simultaneously zonization of the shift register 11, forms at the output of the least significant bit of the last unit level, performing the binary code from the output of the counter 5 to one of the registers 13 of the group. In this case, the binary code generated at the output of the counter 5 is stored in the output of the device. At the same time, the unit level from the output of the least significant bit of shift register 11, arriving at the D- and S-inputs of the second trigger 12, charges the last into a single ^ g ”state and at its inverse output a level of logical 0 is fed to the information D-input of register 11 shear. Upon receipt of subsequent gates from the output of the first trigger 8, zeros are entered into the shift register 11, and the recorded first logical 1, shifting, bypasses' ¹ all the registers of the 13th group, sequentially recording in them the binary codes generated at the output of the counter 5. If, by pressing any key of the keyboard 1, the desired code is already recorded in any group 13 register, the group 14 multiplexer of the same name immediately triggers, at the output of which a logical 0 is formed, which, acting simultaneously on the input of the second element And 15 and the corresponding switch 16, connects the outputs of the last, which was previously in the third state, to the information inputs of the counter 5, the input of which allows entering the code of which receives a logical O signal from element And 15, which performs the pre-entry no 13 had been stored for the required key code to register the group. After this, multiplexer 2, elements NOT 7 and OR 6, and the first trigger 8 are sequentially activated, fixing by prohibiting the transmission of clock pulses through the first element And 4 to the input of counter 5, the received code and at the same time shifting the unit in shift register 11. In this case, the last generated code is stored in the corresponding register of group 13.

Thus, in the proposed solution, through the introduction of several registers, it is possible to quickly memorize the codes generated at the output of the device, and if they are searched, they are extracted without scanning the keyboard, which ultimately increases the speed of the device as a whole.

When logical 1 appears at the output of the high-order bit of shift register 11, logical O is written into the second trigger 12 and logical 1 formed at its inverse output, arriving at the information input of shift register 11, is entered in its lowest digit when the keys are pressed again

Claims (1)

SUMMARY OF THE INVENTION A device for inputting information 5 by ed. No. 1112358, characterized in that, in order to improve the performance of the device, a register, a second trigger, .10 group of registers, a group of multiplexers, a second element And, switches, sampling inputs of which are connected to the outputs of the corresponding multiplexers of the group and the inputs of the second element And are introduced into it the output of which is connected to the control input of the counter, the outputs of which are connected to the information inputs of the group registers, the outputs of which are connected to the address inputs 2θ of the corresponding group multiplexers and information inputs and corresponding switches, the outputs of which are combined and connected to the inputs • counter presets, the information inputs of the group multiplexers are connected to the normally closed contacts of the switching elements, the output of the second trigger is connected to the register information input, the outputs of which are connected to the recording inputs of the corresponding registers groups, the low-order output of the register is connected to the S- and D-inputs of the second trigger, the gate input of which is connected to the high-order output of the register, 35, the shift input of which and the control inputs of the group multiplexers are connected to the inverse output of the first trigger.