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SN74LVC125PWR,请问下同相缓冲器在下图的功能作用,还是只起到一个提高驱动能力作用

Other Parts Discussed in Thread: TMS320C6678

应用环境是,DSP(TMS320C6678)只有一路SPI,需要同时接到norFlash和FPGA上,DSP提供了两个片选信号,图中芯片SN74LVC125PWR输入信号是由DSP提供的SPI时钟,SN74LVC125PWR放在这里的功能是什么,SPI的时钟不能驱动两个芯片吗