The H16750S is a standard UART providing 100% software compatibility with the popular ... where an internal FIFO relieves the CPU of excessive software overhead. An IrDA-compliant serial data port may ...
While all support basic UART features, some add USART support, some have IrDA and Smartcard mode. USART features on the STM32F051 MCU. This listing from the STM32F051 datasheet shows that both of ...