SU1665368A1 - Multiplication logic module - Google Patents

Abstract

The invention relates to automation and computing, and is intended to implement logical formulas of four or less letters represented in a disjunctive normal form. The purpose of the invention is to expand the functionality by implementing the function log. 1. Multifunctional logic module contains information inputs 1-4, reset input 5, counting input 6, counter 7, AND elements 8-12, OR elements 13-15, NOT 16 element, prohibition element 17, output 18. Settings signals received at the outputs of counter 7, belong to the set {0,1}, at the output of the module non-repetitive logical formulas of four letters are realized. 1 ill., 1 tab.

Description

The invention relates to automation and computing, and is intended to implement logical formulas of four or less letters represented in the disjunctive norm form (DNF).

The aim of the invention is to extend the functionality of the module by implementing the function of the logical unit.

The drawing shows a functional diagram of the multifunctional logic module.

The multi-functional logic module contains four information inputs 1-4, reset input 5, counting input 6, counter 7, five elements AND 8-12, three elements OR 13-15, element 16, prohibition element 17 and output 18.

Depending on the values of the variables Zs, Z & and Zf, which are taken from the outputs of counter 7, respectively, and are tuning signals, the module calculates a Boolean function of four variables Zi 22. Za and Z4, f, respectively, coming to information inputs 1-4 of the module. The operation of the module is described by a Boolean function of seven variables.

F - ZtZ5 V ZiZ2 (ZsZ4 V Z6) V Z3Z4Z6 V Z (Z3VZ4) V „„

ZsZ6Z7 (Zi V 22 V Za V ZA) V

ZiZ2Z3Z4.

The operation of the module with different settings signals is described in the settings table.

The module is configured for implementing logic functions as follows.

A reset signal is applied to the reset input 5, which sets the counter to its initial state. At the same time, at the outputs Zs - Z of the counter, the signals Log are set. A. To configure the module to perform a certain logical function, the required number of counting pulses is applied to the counting input 6 of the module in accordance with the table of settings. As a result, the module setup code will be generated at the outputs of counter 7.

For example, to configure a module to implement the function

F (X) - Xi V X2 V ХзХ4

after a reset signal is applied to input 5 to counting input 6 according to the table, three pulses are required. In this case, the information input 1 of the module must be given a signal, the input X2 is a signal X2, the input 3 is a signal X3, and the input 4 is a signal X4. The output of the module 18 will receive the logical function

F (X) - Xi V X2 V XzHo Xi V X2 V Xs V X4.

Similarly, other logical functions of four or less variables defined in the DNF are implemented.

Claims (1)

Invention Formula A multifunctional logic module containing a counter, five AND elements, three OR elements and an NOT element whose output is connected to the first input of the first element I. Its output is connected to the first input of the first OR element, whose output is the output of the module whose reset input is connected with the reset input of the counter, the counting input of which is connected to the counting input of the module, the first information input of which is connected to the input of the element NOT and the first input of the second element I, the second input of which is connected to the second information progress module, the third information input of which is connected to the first inputs of the third element AND and the second element OR, the output of the last of which is connected to the first input of the fourth element AND, the output of which is connected to the second input of the first element OR, the second input of the fourth element AND connected to the first output of the counter , the second output of which is connected to the second input of the first element AND, the second input of the third element AND is connected to the second input of the second element OR and the fourth information input of the module, characterized in that. that in order to extend the functionality by implementing the function lo unit it contains ban, the output of which is connected to the third the entry of the first element OR, the fourth the input of which is connected to the output of the third an OR element whose first input is connected to the output of the second element AND and the first information input of the prohibition element, the second information input of which is connected to the second input of the first element AND, the second input of the third OR element connected to the output of the fifth AND element, the first and second inputs of which are connected respectively the first and second inputs of the second element AND, the third and fourth inputs of which are connected respectively to the first and second inputs of the second OR element, the third output of the counter is connected to the third inputs tert of the first and the fifth elements of AND with the third information input a prohibition element, the control input of which is connected to the second input of the fourth element AND, the output of the third element AND is connected to the fifth input of the first element OR.