SU1013935A1 - Data input device - Google Patents

Abstract

A DEVICE FOR ENTERING INFORMATION containing the first and second keyboards, the first outputs of which are connected to the inputs of the first and second encoders, the outputs of which are connected respectively to the first and second inputs of the register, the output of which is the first output of the device, the first and the outputs of the second keyboard are connected to the first and the second inputs of the OR element, the third register input is an input of the device, characterized in that, in order to simplify the device, an element 2I-OR is introduced into it, the output of which is the second output of the device Twa, the outputs of the first encoder coupled to the first input of the OR-2I, a second input coupled to an output of the OR gate, the second output of the first klaviatu br connected to the third input of OR-element 2I.

Description

WITH

co: o: e The invention relates to the field of digital computing and can be used in automatic control systems and information processing. A device for inputting information is known, which contains switching elements connected to the encoder's inputs of a group of lower-order character codes, the outputs of which are connected to a code characteristic generation circuit, and the switching elements are divided into groups by a series-parallel connection of the higher-order codes. Dov, formed by elements of AND-NOT. In this device, bus nodes of the switching elements with the encoder are divided into groups of lower and higher bits, which affects the structure and number of elements only of the encoder proper 1. The disadvantage of this device is the low reliability due to the large number of elements and the need for series-parallel intercontact connections. The closest to the invention in its technical essence and the effect achieved is an information input device containing mutational emails. cops keyboard decoder with coincidence circuit unit forming a single momentum meat and locking assembly Cs. A disadvantage of this device is its complexity, which increases with an increase in the number of switching elements of the keyboard. The aim of the invention is to simplify the device for inputting information by independently forming the main and additional parts of the character codes. The goal is achieved by entering into a device for entering information containing the first and second keyboard, the first outputs of which are connected to the inputs of the first and second encoders, the outputs of which are connected to the first and second inputs of the register, the output of which is the first output of the device, the first and second, the outputs of the second keyboard are connected to the first and second inputs of the OR element, the third input of the register is the input of the device, the element 2И-OR, the output of which is the second output of the device, the outputs of the first second encoder coupled to the first input element ILY-2I, a second input coupled to an output of the OR gate, the output of the first hastily keyboard is connected to the third input of OR-element 2I. The drawing shows the electrical circuit of the information input device. The device contains switching elements 1, a keyboard of 2 characters and a keyboard of 3 registers, the first encoder 4 of the main part of the character codes, the second encoder 5 of the additional part of the character codes, element 6 OR, element 7 2И-OR, register 8 (code), gate input 9 of the device , the first output 10 of the device and the second output 11 of the device. The entire set of characters entered is indicated on the keyboard keys by 2 characters, and the number of characters on each key of the keyboard 2 is less. Or the number of keys of the keyboard is 3 registers. Key number of the keyboard 3 registers corresponds to the position of characters on the keyboard keys 2 characters. For a 4-register keyboard, the keys (or the field next to the keys), along with symbols, such as F and 1, contain three more symbols as follows: f F V in an eight-bit (4-register) KoI-8 code The following codes correspond to the symbols: W - ONO1111 I - 1000 1111 F - ONO0111 A - 1000 0111 V - it1010 Q - 1000 1010 S - SHNO1100 1 - 1000 1100 о а о е e divided into main (0) and additional (e) parts of codes characters generated by encoders 5 and 4, respectively. The device works in the same way. To generate the code for the character G, you must press the first key of 3 registers, and then the key with the character G of the keyboard 2 characters. At the same time, on the output of the encoder 5, an additional register part of the code of the character Ж - 1111 is formed, and at the output of the encoder 4 - the main (character) part of the code - IT, arriving at the second and first parts of the register 8 of the code, respectively. At the same time, element 6 OR forms the resolving potential at all even inputs of elements 2I of element 7 2I-OR, which in this case sends a signal to the second output 11 of the device Sign of the presence of a code. On this signal, an external device (not shown) generates a signal for transmitting a code arriving at input 9 of the device, and allows the main (IT) and additional (1111) parts of the character code to pass through the register 8 to the first output 10 of the device in parallel (or ; code).

Similarly, the character code 1 - 1000 1100 is formed: a fourth key of the keyboard is pressed. 3 registers, and then a key with the character 1 of the keyboard 2 characters.

Additional switching elements of the keyboard of characters and registers are necessary to form a code with zero information of the corresponding part of the character codes, for example, in KOY-8 it is Yu, P, P, O. In particular, when pressed together, locally, the keys corresponding to the additional switching elements, keypads 2 and 3, a Space is formed, having zero information in the main and additional parts of the character code, and at the same time

A signal is generated. A sign of the presence of a code at the second output 11 of the device.

The device for entering information allows to generate a character code using a simple scheme: two encoders are used with the number of outputs for each of not more than eight and two logical elements - OR and 2-OR.

The device eliminates the matrix (series-parallel) connection of the contacts of the switching elements of the keyboard, which increases the reliability of the device. In addition, the exclusion of the matrix connection of contacts allows the use of switching elements having one output contact, for example, in circuits with a short-circuited substrate of all types.

Claims (1)

DEVICE FOR INFORMATION INPUT, containing the first and second keyboards, the first outputs of which are connected to the inputs of the first and second encoders, the outputs of which are connected respectively to the first and second inputs of the register, the output of which is the first output of the device, the first and second outputs of the second keyboard are connected to the first and second inputs of the OR element, the third input of the register is the input of the device, characterized in that, in order to simplify * the device, the 2I-OR element is inserted into it, the output of which is the second output of the device VA, the output of the first encoder is connected to the first input of the 2-OR element, the second input of which is connected to the output of the OR element, the second output of the first keyboard is connected to the third input of the 2-OR element.