Editing MPC5xx

[[Image:PPC-ECM.jpg|150px|thumb|right|Freescale MPC561 MCU]]
<ref>{{Cite web |title=Motorola 32-Bit Microcontrollers Chosen by GM for Electronic Powertrain Systems |url=https://www.theautochannel.com/news/2002/10/28/149590.html |access-date=2023-09-15 |website=www.theautochannel.com}}</ref> The '''MPC5xx''' family of processors such as the '''MPC555''' and '''MPC565''' are [[32-bit]] [[PowerPC]] embedded [[microprocessor]]s that operate between 40 and 66 [[MHz]] and are frequently used in [[automotive]] applications including engine and transmission controllers. [[Delphi Corporation]] use either the MPC561 or MPC565 in the engine controllers they supply to [[General Motors]], with nearly all 2009 model GM North America vehicles now using an MPC5xx in the engine controller. [[Robert Bosch GmbH|Bosch]] also used the MPC5xx throughout the ME(D)-9 series of Gasoline Engine Controllers, EDC-16 series of Diesel Engine Controllers as did the Cummins B series diesel engine [[Engine control unit|ECU]].

They are generally considered [[microcontroller]]s because of their integrated peripheral set and their unusual architecture: no [[memory management unit|MMU]], large on-chip [[static random access memory|SRAM]] and very large (as much as 1 [[Megabyte|MB]]) low latency access on-chip [[flash memory|flash memories]], which means their [[CPU design|architecture]] is tailored to control applications. Instead of a block-address translation and a hardware-driven, fixed-page address translation prescribed by the first PowerPC specification, the 5xx cores provided a software-driven translation mechanism that supported variable page sizes. This model is the basis for the embedded MMU model in the current [[Power ISA]] specification.

'''MPC5xx''' – All PowerPC 5xx family processors share this common naming scheme.

The development of the PowerPC 5xx family is discontinued in favour for the more flexible and powerful [[PowerPC e200|PowerPC 55xx family]].

== Characteristics ==

The peripherals on each model vary, but frequently include [[analog-to-digital converter]]s (ADC), Time Processor Units (TPU), [[GPIO]], and [[serial communications|UARTS/serial]] (QSMCM). The MPC5xx family descends from the MPC8xx [[PowerQUICC]] family core, which means it uses a [[Harvard architecture]], single issue core. Unlike the 8xx family, the 5xx variants have a [[floating point unit]]. While some of the earlier chips like the MPC509 had an [[instruction cache]], the recent chips have the capability to contain large amounts of NOR flash memory on-board which is capable of bursting instructions to the processor. Some low-cost chips omit the flash memory because it adds a lot of die area, driving up the price of the chip. Many controller applications run very long control loops where there is not a large dataset and low latency, deterministic access to both data and instruction routines is more important. If most of the data can be stored in the on-chip SRAM available to the datapath of the processor in a single cycle, performance can be quite good. If data must be accessed off-chip frequently, performance can be reduced because the chip cannot burst data accesses from external RAM and has a very slow [[computer bus|bus]] access protocol. Because of the simple memory interface that can be programmed by setting a default memory location and writing a few base registers, the chips are quite popular with hobbyists as well as with automotive and industrial developers.

==References==
{{Reflist}}

== External links ==
* [http://www.freescale.com/webapp/sps/site/taxonomy.jsp?nodeId=0162468rH3bTdG06C18648 Freescale's MPC5xx page]
* [http://www.phytec.de/de/produkte/module-nach-hersteller/freescale.html MPC555, MPC565 Single Board Computers]

{{Motorola microcontrollers}}
{{Microcontrollers}}

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[[Category:PowerPC microprocessors]]
[[Category:Freescale Semiconductor microcontrollers]]