One aspect of an intravascular ventricular assist device is an implantable blood pump where the pump includes a housing defining a bore having an axis, one or more rotors disposed within the bore, each rotor including a plurality of magnetic poles, and one or more stators surrounding the bore for providing a magnetic field within the bore to induce rotation of each of the one or more rotors. The firmware control unit determines whether the power supply state of the power supply is in a first power mode, by checking a power supply state signal. Titanium metal is deposited over the surface of the wafer so that the exposed surface of the diffusion region is completely covered by a layer of the metal. Responsive to a determination that the element requires a retargeting bias, a retargeting bias is selected for the element based on the three-dimensional representation of retargeting bias values. In one embodiment, the present invention combines dynamic identity value substitution and directory filter rules to enable rule based identity management. The method includes: directly inputting an address signal to a wordline decoder for logic decoding; generating various signals by setting various devices in terms of timing; and performing sensitive amplification on data that is input by a memory cell array and is selected by a bitline, and then outputting the data, that is, generating a data output signal.