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HARDWARE SHORT CIRCUIT FINDER THROUGH SOFTWARE

IP.com Disclosure Number: IPCOM000008649D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jul-01

Publishing Venue

Motorola

Related People

Authors:
T. Murugappan

Abstract

Conventional methods of finding short circuits while developing and testing hardware is typically done by injecting current to locate the shol-1 circuits. However. such conventional methods are expensive. A more cost effective and efticient way of finding short circuits is by using software. A software method is herein proposed to find short circuits in digital hardware such as controller hardware based on 68HCl I which typically has a microprocessor and various memories. In this method, a logic sequence is used to find such short circuits which can occur between Vcc, Address lines, Data lines or Ground. This method can run from an emulator or a test system 2. SOLUTION This method finds short circuits by writing specific patterns and reading the data back from the memory of a target board in which testing is required. By comparing written and read data, the method can find between which lines the short circuit is located. Details ofthis method is discussed below.