McBSP PCM

DM3730中的PCM驱动，从模式

数据手册里写道

 4-pin mode: dx and dr as data pins; clkx and fsx pins as control pins. The clkx and fsx pins are

internally looped back, via software configuration, respectively to the clkr and fsr internal signals for

data receive.

它的意思是说，PCM从模式的时候我是要通过设置寄存器实现回环么？

Chris Meng：

Yang Guozheng，

The clkx and fsx pins are internally looped back to the clkr and fsr internal signals for data receive.

因为是4线模式，只有发送的clk和fs，对于接收数据，使用的时钟和帧同步也是发送的clk和fs，需要软件进行配置。