At the time of burn-in test, substrate voltages of transistors in a sense amplifier are switched by a PMOS substrate voltage generating portion and an NMOS substrate voltage generating portion. Systems and methods are described herein that facilitate the use of a digital camera to provide the digital image. A second fastener also can be aligned with a second corresponding opening in the plate such that it is oriented substantially perpendicular to the plate, and a breakable connection can be used to couple the second fastener to the plate. The second unit is configured to program a recognition bit for recognizing which of the logic 0 and the logic 1 the initial state of the memory cell of the designated address is in, when the programming operation is performed. In the pipe joint of the present invention, the body part and the coupling parts comprise an integrated plate.