Patent ID: 7403027

Claim:
An apparatus comprising: a plurality of input/output (I/O) pins; one or more functional blocks; a Self-Heat Burn-In (SHBI) state machine coupled to the I/O pins and to the one or more functional blocks to provide the I/O pins with a first portion of first test patterns and to provide the one or more functional blocks with a second portion of the first test patterns during a first SHBI mode of operation, and to provide the one or more functional blocks with at least a portion of second test patterns during a second SHBI mode of operation; and a logic selector circuitry coupled to the SHBI state machine and the one or more functional blocks, and configured to select and output to the I/O pins the first portion of the first test patterns to stress the I/O pins without selecting and outputting to the I/O pins internal signals of the one or more functional blocks during the first SHBI mode of operation, and to select and output to the I/O pins internal signals of the one or more functional blocks during the second SHBI mode of operation.