Hello Linas,Unfortunately the STLinks V3-SET or V3MODS (based on STM32F723) won't get FDCAN bootloader because the micro inside has no FDCAN.The new STLINK-V3PWR (based on STM32H745) could have it, but I have no idea about the date it will be availab...

You can find some documentations with AN2606, AN5405 or Here.As I'm not a software guy, I think there are also differences between CAN and FDCAN bootloaders : STLink-V3MODS is CAN bootloader compatible while U5 has a FDCAN bootloader.Best regards,

Hello Linas,Not sure to get your point, but if you tried to connect directly TCAN1462VDRBRQ1 CANH & CANL pins to STM32U585 PB8 & PB9 pins it won't work. You can either connect STLink-V3MODS pins 8&9 to STM32U585 PB8 & PB9 (no need to perform a real C...