If data is written into UCxTXBUF while the master is held inactive by UCxSTE, it will be transmitted as soon as UCxSTE transitions to the master-active state. If an active transfer is aborted by UCxSTE transitioning to the master-inactive state, the data must be re-written into UCxTXBUF to be transferred when UCxSTE transitions back to the master-active state. The UCxSTE input signal is not used in 3-pin master mode. 这是手册上的原话,最后一句说3线不用UCxCTE,难道我理解的不对吗·····
谢谢
If data is written into UCxTXBUF while the master is held inactive by UCxSTE, it will be transmitted as
soon as UCxSTE transitions to the master-active state. If an active transfer is aborted by UCxSTE
transitioning to the master-inactive state, the data must be re-written into UCxTXBUF to be transferred
when UCxSTE transitions back to the master-active state. The UCxSTE input signal is not used in 3-pin master mode.
这是手册上的原话,最后一句说3线不用UCxCTE,难道我理解的不对吗·····
你的理解没错。msp430的三线制不使用UCxCTE,从设备的使能引脚直接接到相应的电平就可以了。
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