Design of Equipment Fault Injection System Based on BIT

At present, the microprocessor technology and micro-electronics technology are developing fast. The complication of equipment electronic systems is improving continuously, so is the density of the circuits. Therefore, BIT (built-in test) has become a crucial element in solving fault diagnosis of equipment electronic systems. In order to design BIT effectively and evaluate its fault diagnosis ability, fault injection technology should be applied to the system to carry out the testability experiment. Aiming at the requirement of testability experiment for certain equipment, a fault injection system based on BIT is set up. The basic flow and theory about fault injection is expatiated on and the hardware frame of fault injection system is given.