A technique used to return acknowledgement information across a full-duplex (two-way simultaneous) data link without the use of special (acknowledgement) message.

经全双工(双向同时)数据链路，不用专门(确认)报文返回确认信息所用的技术。

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UART allow to full-duplex communication at serial link circuit.

UART允许在串行链路上进行全双工的通信。

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This kind of communication mode employs three-wire connection and full duplex synchronous data transmission. It has the features of less link, fast speed, high reliability and etc.

这种通信方式采用三线连接，全双工同步数据传输，具有连线少、速度快、可靠性高等特点。

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