CC2640的硬件SPI接口支不支持3线SPI设备

《CC26xx技术参考手册》p.1383：

20.4.4.2 Motorola SPI Frame Format
The Motorola SPI interface is a 4-wire interface where the SSIn_FSS signal behaves as a slave select.
The main feature of the Motorola SPI format is that the inactive state and phase of the SSIn_CLK signal
can be programmed through the SPO and SPH bits in the SSI:CR0 control register.

请问下，意思是不是CC2640的硬件SPI接口只支持4线SPI的设备，不支持3线SPI设备?

三线和四线就是半双工和全双工的区别，如果你的SPI只有一个从设备，那三线也可以用

看资料要看完，Motorola 就是标准4线SPI，TI SPI的才是3线标准

TKS.