New MCU

Some features that we want:

• Dual Core

• CanFd support

In addition, we may need to find substitutes due to supply chain issues.

Spreadsheet below has some MCU’s I’ve looked into so far.

Started with randomly finding them on Digi-Key, realized that I should probably have a more systematic way of searching, and am currently going through different manufacturer websites, looking at MCUs with CAN-FD support, and selecting those with a unit cost less than ~$15. Probably will be a lot more organized later.

Things to consider:

• Other Considerations:

  • Clock frequency

  • More ram, 32 kB sometimes tight

  • Other cool features (such as native flash-over-CAN)

  • Prevalence in industry

  • Vendor support

    • Do lots of libraries work on it?

    • Is there a good HAL (hardware abstraction library) for it from the manufacturer?

    • Is there good tooling/build support?

    • IDE

  • Standard features (ADC, DAC, I2C, SPI, timers, UART, 3.3V digital high, 3.3 or 5V power supply, etc.)

• Sampling programs for more expensive MCUs

  • https://www.microchip.com/samples/

  • https://www.nxp.com/products/product-selector:PRODUCT-SELECTOR#/category/c731_c1770/%7B%22filters%22:%7B%22Order%22:%7B%22value%22:%5B%22Order%20sample%22%5D,%22type%22:%22checkbox%22%7D%7D%7D

• Package should have exposed pins (No BGA or QFN)

• Manufacturers checked:

  • NXP: MCUs that support CAN FD don’t seem to have an internal DAC

  • Microchip: Have checked 32-bit cores, don’t seem to have 32-bit dual cores that support CAN interface, need to check 16-bit dual core options next

  • STMicroelectronics: TODO

  • Texas Instruments: TODO

  • Renesas: TODO

  • Infineon Technologies: TODO

  • Cypress Semiconductor Corp: TODO