LogiCORE IP AXI UART 16550 (v1.01a) Data Sheet (AXI)(DS748) - 2.2 English - The AXI Universal Asynchronous Receiver Transmitter (UART) 16550 connects to the AMBA (Advance Microcontroller Bus Architecture) AXI (Advanced eXtensible Interface) and provides the controller interface for asynchronous serial data transfer. This soft IP core is designed to connect via an AXI4-Lite interface. This document contains information about the AXI4 version of the core.