Online detection logic unit of hardware circuit

Abstract

The invention provides an online detection logic unit of a hardware circuit, and relates to the field of logic unit online detection. The online detection logic unit solves problems that an existing basic logic element structure of a look up-table adding a trigger is lack of determination of faults of the basic logic element and a fault response mechanism, once faults occur, a whole circuit including other basic logic elements in normal operation are abandoned to use, so as to cause resource wastes and low hardware utilization rate. An either-or multipath selector is used to determine output of a logic unit according to input configuration bits. A check bit generation circuit converts four paths of information bits to three paths of Berger code check bits. A compartor is combined to determine whether a combinatorial logic function has faults. An XOR gate is used to determine whether a sequential logic function has faults. An OR gate is used to receive sequential logic function fault detection results and combinatorial logic function fault detection results, and performs OR logic on the results, so as to determine whether a logic unit has faults. The online detection logic unit is used for online detection of a logic unit.

Description

technical field [0001] The invention relates to a method for completing the online detection of the combinatorial logic of the Basic Logic Element (BLE) through an encoding circuit and the online detection of the sequential logic of the Basic Logic Element (BLE) through the dual-mode structure of the D flip-flop. A new type of basic logic unit structure. The invention belongs to the field of online detection of logic units. Background technique [0002] The on-line detection of hardware circuit means that when the hardware circuit is working normally, it can monitor the working condition of the hardware circuit in real time and check whether the hardware circuit is faulty without affecting the normal operation of the hardware circuit. With the rapid development of programmable logic devices as a general-purpose device, the traditional bottom-up digital system design method using fixed-function devices has been changed, and users can no longer rely on chips designed and manu...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the problem that the structure of the existing look-up table plus the basic logic unit of the flip-flop lacks a mechanism for judging the failure of the basic logic unit and responding to the failure. Once a failure occurs, the entire circuit including other normal working basic logic units will be destroyed Abandoned use, resulting in waste of resources and low hardware usage

Images