SU1260939A1 - Universal logic module - Google Patents

Abstract

The invention relates to the field of automation and computing. The purpose of the invention is to increase the testability of the module. The universal logic module contains informational and tuning inputs, the NAND Element, the EQUIDITY elements and the modulo-2 adder. The module works in two modes. In the operating mode, a low level signal is applied to the setup input connected to the first input of the NAND element. Then, depending on the signals at the other tuning inputs at the output {module, any Boolean function of two variables is realized. In control mode, a high level signal is applied to the first input of the NAND element. Then, when applying to the remaining inputs of the module of a corresponding test set, a square wave with a period of 6T will be observed at the output (t is the delay time signal on one element). The absence of a meander indicates the presence of a fault in the module. 1 il. 1 tab. i (l go o) about 00 th

Description

This invention relates to automation and computing.

The purpose of the invention is to improve the testability of the module.

The drawing shows the functional diagram of the universal logic module.

The module contains tuning inputs 1-5, information inputs 6 and 7, element 8 AND-NOT, elements 9-11 EQUAL VALUE, adder 12 modulo two output 13.

The module operates as follows.

If the signal at the output of element 8 AND-NOT is equal to one, i.e. signal I, O, and the information inputs 6 and 7, respectively, apply variables x, X, then with a simple alphabet, the settings depend on the tuning signals H-, Hj, I., Mj at inputs 2-5 at output 13 any Boolean variable functions (table).

The table shows the type of function implemented depending on the combination of signals at the tuning inputs.

Type of function implemented

Combinations of signals on the tuning inputs

...

- “-“ - H – Jb “J.

x, vx

x, Vx,

X, X., V X, X,

.

01

10 10 11 11

I

0 1 0

one

in control mode, if the signal is And. 1, and to the configuration and data inputs 2-7, respectively, to send signals (011111) or (100000), then if the module is properly functioning, a square wave with a period of 6t will be observed at output 13. If the meander is not functioning correctly, output 13 will not.

Claims (1)

Invention Formula Universal logic module containing the first, second and third elements of EQUALITY, with the first and second tuning inputs of the module connected to the first inputs of the first and second elements of EQUALITY, respectively, in order to increase testability, modulo two adder and an NAND element are entered into it, the first information input of the module is connected to the first input of the third EQUALITY element and the second input of the first element EQUALITY, the second information input of the module Inna with the second inputs of the second and third elements of EQUALITY, the third fourth and fifth tuning inputs of the module are connected respectively to the third input of the third element EQUALITY, the first input of the NAND element and the first input of the modulo two, the second, second, third and fourth inputs of which are connected to the outputs of the first, second and third elements of EQUALITY, respectively, the output of the adder modulo 3 12609394 two are connected to the code of the module and the first and second elements of the EQUAL - the second input of the NAND element, the output VALUE and the fourth input of the third one are connected to the third input of the EQUALITY element. Compiler A.Fyodorov Editor T.Parfenova Tehred A. Kravchuk Proofreader M. Zakae 5232/49 Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production Poly Raficheskoe enterprise, Uzhgorod, st. Project, 4