The module requires a single 5V DC supply input and provides an auxiliary 3.3 V output for external logic. The board is equipped with two LEDs that indicate power on and USB traffic. Program and firmware updates can be performed by use of a USB flash disk or via one of the other device interfaces.
The VNC1L IC provides all USB host interfaces and data transfer functions. With its built in microcontroller and flash memory, VNC1L encapsulates the popular USB device classes. When using storage devices, such as USB flash drives, the Vinculum Disk and Peripheral Interface (VDAP) instruction set provides a convenient method of handling file, directory and file allocation table (FAT) commands.