A Microchip SAMD11 debug controller enables person configuration in the FPGA and presents many diagnostic interfaces: A whole, user-programmable JTAG controller capable of configuring the FPGA and speaking by means of JTAG with consumer patterns I shortly started out referring for the idea as "usbstar" in my private notes and https://cynthion06284.glifeblog.com/32179935/the-smart-trick-of-cynthion-that-nobody-is-discussing