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Differences between MCU and MPU
2022-07-07 10:11:00 【m0_ fifty-nine million nine hundred and forty-nine thousand fou】
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 ) |
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