STMicro microcontroller families

- OVERVIEW -

This wiki page a stash point for comparative notes on contemporary, cerca 2020 microcontroller families. First comparisons looking at ARM Cortex-M0 and Cortex-M4 class parts. Search may extend to other architectures, depending on low power abilities of parts and availabilities.

^ STMicro

The STMicro STM32F series microcontrollers may as of 2021 Q2 be superseded by STM32L series parts. To do: [ ] check email correspondence with STMicro representative . . .

• https://www.st.com/en/microcontrollers-microprocessors/stm32f4-series.html

Processors from two families to investigate:

• STM32F427/437 – serial audio interface, more performance and lower static power consumption
  
• STM32F410 – New milestone in outstanding power efficiency (89 µA/MHz and 6 µA in Stop mode), true random number generator, low-power timer, and DAC.
  
• STM32F413/F423 – Extends STM32F412 features with higher RAM and Flash memory density and an enhanced peripheral set including 10 UARTs, 3 CANs, SAI interface, a low-power timer, 2 DACs, 2 DFSDM with up to 6 filters. The STM32F423 includes AES encryption.
  

ARM based STMicro parts utilizing cores equal to or greater than Cortex-A8:

• https://www.st.com/en/microcontrollers-microprocessors/spear-arm-cortex-a9-microprocessors.html

^ Development boards

• https://www.sparkfun.com/products/17678 NUCLEO-WL55JC2 STM32WL Nucleo-64 board

^ NXP/Freescale

This section a stub section to hold notes regarding NXP family microcontrollers.

• https://www.nxp.com/docs/en/data-sheet/LPC408X_7X.pdf

^ Features and Terms To Investigate

• Bit banding . . . what is this?

An excerpt from STM32F413-423 datasheet, page 63:

Example
The following example shows how to map bit 2 of the byte located at SRAM1 address 
0x20000300 to the alias region:
0x22006008 = 0x22000000 + (0x300*32) + (2*4)
Writing to address 0x22006008 has the same effect as a read-modify-write operation on bit 
2 of the byte at SRAM1 address 0x20000300.
Reading address 0x22006008 returns the value (0x01 or 0x00) of bit 2 of the byte at SRAM1 
address 0x20000300 (0x01: bit set; 0x00: bit reset).
For more information on bit-banding, refer to the Cortex®-M4 with FPU programming 
manual (see Related documents on page 1

STM32L4 series, low power and ultra low power features:

• https://www.st.com/en/microcontrollers-microprocessors/stm32l4-series.html

^ Asides

Following sub-sections hold links to external references, to explore at a later time . . .

^ 16-bit Microcontrollers

Had heard of sixteen bit microcontrollers, but interesting to find that STMicro manufactures one. There is only one such bit-width part on STMicro's site, and it is not recommended for new designs. Link here:

• https://www.st.com/en/microcontrollers-microprocessors/st10-16-bit-mcus.html#2