New to SAMD21.
Made a minimal schematic (please see below) based on Trinket M0, the chip it self and couple caps (C3,C2) with Micro-USB.
Was able to programm trinket bootloader (via SEGGER and also via Atmel Studio) the Trinket M0 bootloader (bootloader-trinket_m0-v3.14.0.bin)
but when attaching USB to Windows 10 I see "Unknown usb device" error, please see below:
Any help is appreciated!