PowerPC 5000

The PowerPC 5000 family is a series of PowerPC and Power ISA microprocessors from Freescale (previously Motorola) and STMicroelectronics designed for automotive and industrial microcontroller and system on a chip (SoC) use. The MPC5000 family consists of two lines (51xx/52xx and 55xx/56xx) that really don't share a common heritage.
Processors.
MPC52xx.
The MPC5200 family is based on the e300 core MGT5100 processor and is also a part of Freescale's mobileGT platform.
MPC55xx.
Based on the e200 core that stems from the MPC5xx core, it is upwards-compatible with the newer e500 core and the older PowerPC Book E specification. Focus is on automotive and industrial control systems, like robotics, power train and fuel injection. The cores are the basis for a multitude of SoC controllers ranging from 40 to 600 MHz with a variety of additional functionality, like Flash-ROM, Ethernet controllers, and custom I/O. All MPC55xx processors are compliant with the Power ISA v.2.03 specification.
The MPC55xx family have four slightly different cores from the really low end and to the high end.
MPC56xx.
The MPC56xx family are PowerPC e200 core based microcontrollers jointly developed by Freescale and STMicroelectronics. Built on a 90 nm fabrication process. These microcontrollers are tailor-made for automotive applications like power steering, fuel injection, display control, powertrain, active suspension, chassis control, anti-lock braking systems, and radar for adaptive cruise control. Freescale calls these processors "MPC56xx" and ST names them "SPC56x".