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求教C6748 的I/O口输出电平怎么设置?

Other Parts Discussed in Thread: TMS320C6748

求教 TMS320C6748 这款芯片 的 I/O 口是不是可以配置成1.8V 或者3.3V输出?在 datasheet 里看到了 

是不是只需要设置DVDD3318_x 就可以?