SU883894A1 - Multi-functional logic module - Google Patents

Description

(54) MULTIFUNCTIONAL LOGICAL MODULE

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The device relates to automation and computing technology and is intended to obtain structures of multifunctional logic modules that implement arbitrary functional dependencies of three variables.

Known multifunctional logic module that implements the various functions of two or more variables l.

The disadvantage of the module is that it has a complex construction and is focused on the implementation of either all the logical functions of a given number of variables, or the specified classes (types) of logical functions. The latter determines the fact that in practical use of the module for the synthesis of multifunctional automatic machines with memory, it is necessary to use multifunctional modules that implement all the logical functions of the input variables (universal modules, since the functional requirements for the latter can be quite diverse.

The closest in functionality to the present invention is a multifunctional logic module that implements the logical functions of two or more variables and contains two equivalence schemes G2 3.

However, on the basis of this module it is impossible to obtain an economical scheme that implements any set of logical functions of three variables.

The purpose of the invention is to expand the functionality by increasing the number of implemented logical functions.

The goal is achieved by the fact that a multifunctional logic module containing the first group of equivalence elements and the first element AND, the first inputs of the equivalence elements of the first group 3 are connected respectively to the information inputs of the module, the second inputs of the equivalence elements of the first group are connected to the first group of configuration inputs of the module respectively , and the outputs of the elements of equivalence of the first group are connected to the inputs of the first element And, respectively-, the second group of elements p is introduced into the Negro ambiguities, the second element is AND, the OR element and the output element of equivalence, the first inputs of the equivalence elements of the second group are connected respectively to the information inputs of the module respectively, the second inputs of the equivalence elements of the second group are connected to the second group of configuration inputs of the module, respectively connected to the inputs of the second element AND, respectively, the outputs of the elements AND are connected respectively to the input of the element OR, the output of which is connected to the first input of the equal element output element, the second input of which is connected to the control input of the module, and the output is connected to the output of the module. Figure 1 shows the functionality of the module circuit; Fig. 2 is a diagram implementing the SUM function; in FIG. 3, the module circuit after optimization. The module circuit contains information inputs 1-3, configuration inputs 4 elements 11-16 equivalences, elements 17 and 18, element OR 19, equivalent elements 20 and output 21 modules. Inputs 1-3 information is connected to the elements 11,14; 12.15; 13,16 equal symbols, respectively, the second inputs of elements II -16 equivalent are connected to the configuration inputs 4-9, the outputs of elements 11-13 and 14-16 are connected respectively via elements AND 17-18 to the element OR 19, the output of which through the element 20 equivalence is connected to the output of the module, and the second input is connected to the setup input 10. The module of such a structure describes with the expression f (X, Xs) (L, and.) L R (X., Oj),, where f (is the logical the function is reaaizable by the module for a specific set of tuning signals; R is the equivalence function and allows, provided that, (, t) ,,, x ,,, and also under the condition, -1, X, X ,, D.X ,,; to realize an arbitrary logical function of three variables. The values of the signals when implementing certain logical functions are presented in the table. The module functions as follows. To obtain a circuit of a device that implements an arbitrary function the dependence of the three variables is determined by the corresponding optimization signals U (i 1,7), related to the set J. e (o, i. er}) which are fed to the optimization inputs. Based on the condition of functioning of the element of equivalence R (A, B) -A, the modulus scheme is optimized. For example, on the basis of a module, it is required to construct a circuit that implements a sum function. Based on the expression (1), For this function, the Vb,. Using optimization conditions (2) for the data U, we obtain a circuit that implements the sum function (figure 2). In a similar way, a circuit is implemented that implements an arbitrary logical function of three variables. To construct a circuit that implements an arbitrary set of logical functions of three variables, a set of optimization signals is defined for each function and among them there are sets of signals that distinguish between each other as few concrete values as possible. Further, the structure of the module is optimized in accordance with condition (2) The module inputs, on which the optimization signals take on different values of 5 for the given list functions, are taken as tuning for e. For example, when implementing logical functions (, At the inputs of settings 4–10, the following sets of signals are supplied: - and, 1;, and X -, / 5,, and,., -, - c ,,, Xs, At the same time, the structure of the module after optimization has the form (fig. Z. Similarly, for an arbitrary set of logical functions of three variables. Thus, the proposed module realizes all the logical functions of three variables and allows on a basis to implement a multifunctional scheme that implements arbitrary functional dependencies. With This module is constructive. homogeneity and simplicity, has high speed, allows you to easily and quickly get mono and multifunctional schemes of a given functionality, which are simple, on the basis of this module simply solves the problem of automating the design of combinational devices of a computer. processing of information allows to significantly simplify the design stage, reduce the time and typical composition of the element base used.

Claims (1)

Claim A multifunctional logic module containing the first group of equivalence elements and the first element AND, with the first inputs of the equivalence elements of the first group connected respectively to the information inputs of the module, the second inputs of the equivalence elements of the first group connected to the first, group of tuning inputs of the module, respectively, and the outputs of the equivalence elements of the first groups are connected to the inputs of the first element AND, respectively, characterized in that, in order to expand the functionality due to increased cheniya number of implemented logical functions, it introduced a second group of elements of equivalence! a second AND gate, an OR gate and an output element of equivalence, the first inputs of the elements of equivalence of the second group are respectively connected to the data inputs of the module, respectively, second inputs of elements equivalent to ₅ NOSTA second group are connected to the second group of tuning module inputs, respectively, and outputs elements of the equivalence of the second group are connected to the inputs of the second AND element, respectively, the outputs of the AND elements are connected to the inputs of the OR element, respectively, whose output is connected to the first input in Khodnev equivalence element, the second input of which is connected to the control unit input, and an output - is connected to the output module.