MICROCHIP AC320101 is a UART-to-USB Adapter Board that allows for easy communication between a PICtail connector and a USB port. It utilizes the MCP2200 Breakout Module to convert USB signals to UART signals, which can then be accessed by the PICtail connector on either the Multimedia Expansion Board (MEB) or the Multimedia Expansion Board II (MEB II). The board features four jumpers that can be used to route the UART signals to either the MEB or MEB II, providing flexibility in connecting to different target devices.