USB Armory Mk II Debug Board

The USB armory Mk II exposes a USB-C receptacle, which allows the so-called ‘debug accessory mode’ to route analog/debug signals over its connector. The USB armory Mk II design leverages this to break out UART, SPI, I²C, and GPIO connections to/from its application processor. The debug accessory board allows access to UART and GPIO signals through USB, without requiring probes, through an FTDI FT4232H. This allows, for example, access to the USB armory Mk II serial console without wires or probes, natively using only USB cables. All other interfaces can be accessed through dedicated breakout through-holes. The board measures 22 mm x 57 mm x 12 mm, including the length of the USB-C connector.