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DSP地址线或数据线能否既当地址线又当数据线的用法?

问一下关于TI的DSP的地址线或数据线,是否可以既当地址线用,又当数据线用的做法?
我目前在准备的是TMS320F28377DPTPT的芯片。
在EtherCat外部方案中用到了地址线和数据线共用的情况,请确认下帮忙,谢谢!