网络释义
1)USA Universal Synchronous Asynchronous,通用同步异步2)USART(universal synchronous/asnchronous receiver/transmitter),通用同步/异步收发器3)usart,通用同步异步收发机4)USART Universal Synchronous Asynchronous Receiver Transmitter,通用同步异步收发器5)synchronous/asynchronous communication,同步/异步通信6)synchronous & asynchronous call,同步、异步调用