Differences between MCU and MPU

CPU（Central Processing Unit, a central processor ） Developed three branches , One is DSP（Digital Signal Processing/Processor, Digital signal processing ）, The other two are MCU（Micro Control Unit, Microcontroller unit ） and MPU（Micro Processor Unit, Microprocessor unit ）.
MCU Integrated on-chip peripheral devices ;MPU Without peripheral devices （ For example, memory arrays ）, It is a highly integrated general-purpose processor , The integrated peripherals are removed MCU;DSP Strong computing power , Good at many repeated data operations , and MCU It is suitable for the processing, diagnosis and operation of a variety of data from different information sources , Focus on controlling , Not as fast as DSP.MCU The difference in DSP The biggest feature of is its universality , Reflected in instruction set and addressing mode .DSP And MCU The combination of DSC, It will eventually replace these two chips .

Difference

project	MCU	MPU
operation bit Count	Main stream 8～32bit, 64bit There are	The minimum 32bit, Main stream 64bit
Working frequency	A few megahertz to hundreds of megahertz	The mainstream is from hundreds of megahertz to thousands of megahertz
framework	Pipeline system or random logic system is the mainstream ( But some are superscalar )	Superscalar method is the mainstream
memory management	You can have some external memory , But main memory is built-in , Some built-in caches and MMC unit	External memory is the mainstream , Some built-in caches and MMC unit
Command set	Basic arithmetic operations , Only logical operations , The high-end version also supports DSP And floating point arithmetic	In addition to basic arithmetic operations 、 Beyond logical operations , It also includes DSP Instructions and Floating Minority instructions
Price	low	high
Example	ARM Cortex-M,( For small areas / Developed for the application of low power controller )	ARM Cortex-A,( It is developed based on the concept of processor for high-performance applications )