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ADS7864与TMS320VC5402连接的电平转换问题

Other Parts Discussed in Thread: ADS7864, TMS320VC5402

ADS7864与TMS320VC5402连接的时候,busy、rd、cs等控制信号需要进行电平转换吗?如果用74lvc4245电平转换的话,dir引脚的高电平是3.3v还是5v,dir接dsp上的哪个引脚来控制方向?我打算把ad上的cs和rd一起接到dsp的r/w上,这样可以吗?cs需要接dsp上的is引脚吗?