Tag: ARM based microcontrollers

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Arm Based Microcontrollers

At the time of writing this article ARM-based microcontroller means the microcontroller which uses a 32-bit RISC processor design from ARM holdings.

Presently ARM Cortex-M series of processor cores are being integrated into microcontrollers.

The ARM-Cortex M family comprises the following processors.

  • Cortex-M0
  • Cortex-M0+
  • Cortex-M1
  • Cortex-M3
  • Cortex-M4
  • Cortex-M7
  • Cortex-M23
  • Cortex-M33
  • Cortex-M35P
  • Cortex-M55

The Cortex-M4 / M7 / M33 / M35P / M55 cores also have a hardware-based floating-point unit. The addition of a Floating point unit adds the capabilities for digital signal processing.

To see a list of ARM-based microcontrollers.

Keil.com has a great list that has almost all the major microcontrollers out in the market and is supported by the Keil IDE.

https://www.keil.com/dd/chips//arm.htm
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ARM Processor Based Microcontrollers from ST

There are lot of ARM based microcontroller offered by ST.

They use ARM Cortex M processor with ST peripheral such as GPIO, ADC etc.

They mostly fall into these following groups:

  1. ARM Cortex M0
  2. ARM Cortex M3
  3. ARM Cortex M4
  4. ARM Cortex M33
  5. ARM Cortex M7
    which is also known as M4F as it has an FPU unit.

Then there is ST classification :

  • High performance
    Higher clock speed, Has almost everything included from that segment.
  • Mainstream
    Balanced between Low Power and High Performance.
  • Low Power
    Clock speed reduced to a limit, Has additional hardware for switching off individual peripherals.
  • Wireless
    Has cortex M0+, Peripherals support for radio

The widely available stm32f1 microcontroller also known as the blue pill has ARM cortex M3.

STM32L4 has an ARM Cortex M4F.