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请问cc2538的两组spi在硬件布线上是使用哪些管脚呢

Other Parts Discussed in Thread: CC2538

由于我们所使用的系统有两个芯片分别需要与cc2538做spi通讯,在阅读cc2538的数据手册时发现好像只有PA2~PA5有配置成ssi的功能,是否还有另一组管脚可以配置制成spi呢,顺便问一下ssi和spi是一样的吗?还是需要切换呢?麻烦工程师大神解惑,感激不尽