The MPC5553 microcontroller (MCU) is a member of the MPC5500 family of microcontrollers based on the PowerPCTM Book E architecture. This family of parts contains many new features coupled with high performance CMOS technology to provide substantial reduction of cost per feature and significant performance improvement over the MPC500 family. The host processor core of this device is compatible with the PowerPC Book E architecture. It is 100% user mode compatible (with floating point library) with the classic PowerPC instruction set. The Book E architecture has enhancements that improve the PowerPC architecture's fit in embedded applications. This core also has additional instructions, including digital signal processing (DSP) instructions, beyond the classic