Patent ID: 6553527
Filing Date: 2003-04-22
Classification: G01R,G11C

Abstract:
A programmable Array Built-In-Self-Test (ABIST) method for testing an array comprising the steps of:scanning into a programmable ABIST controller a test instruction sequence; executing said test instruction sequence; outputting, in response to executing each instruction step in said test instruction sequence, first control bits and second control bits and coupling said first control bits to a programmable expect generator and coupling said second control bits to an array input address generator and an array input data generator for said array; generating expect data outputs from said programmable expect generator in response to said first control bits concurrent with generating array input addresses from said array input address generator and array input data from said array input data generator in response to said second control bits; generating array outputs in response to said array input addresses and said array input data; comparing said expect data outputs, said array outputs, and selected control bits from said first control bits; and generating and outputting a sequence of pass/fail results in response to said comparison of said expect data outputs, said array outputs and said selected control bits.