Load initial bootloader thought CAN interface?

klv222 — Thu, 30 Oct 2025 22:00:12 GMT

Can the initial bootloader file be loaded through the CAN interface on a brand new MCU, thus eliminating the need for a JTAG connector?

Re: Load initial bootloader thought CAN interface?

Alice_Yang — Fri, 31 Oct 2025 02:20:00 GMT

Hello @klv222

Please describe your question in more detail. Which chip are you referring to? Which bootloader file?

Thank you.

Alice

Re: Load initial bootloader thought CAN interface?

koena57jim — Mon, 02 Feb 2026 05:50:54 GMT

Yes, it is possible in some MCU families to load the initial bootloader through the CAN interface on a brand-new MCU, potentially eliminating the need for a JTAG connector, but this depends entirely on the MCU’s built-in features. Many modern microcontrollers ship from the factory with a ROM-resident bootloader that supports communication over interfaces such as CAN, UART, USB, or SPI. If CAN is supported in this factory bootloader, the MCU can be programmed directly via the CAN bus on first power-up, provided the correct boot mode pins or configuration are set. However, if the MCU does not include a CAN-capable ROM bootloader, JTAG or SWD is still required at least once to install an initial bootloader. Additionally, JTAG remains valuable for low-level debugging, recovery from misconfiguration, and unbricking devices, even if it is not required for normal production programming. change healthcare

K32 L Series MicrocontrollersのトピックRe: Load initial bootloader thought CAN interface?

Load initial bootloader thought CAN interface?

Re: Load initial bootloader thought CAN interface?

Re: Load initial bootloader thought CAN interface?