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【C6670】CVDD核电压的测量



各位TI工程师好,在配置DDR3之前需要先确定核电压CVDD的大小,根据以前的帖子我找到了相关测量的步骤

如上面两幅图所示,根据VCNTL来测量出VID,再从map里找到对应的CVDD值。

但是VCNTL都是输出,如何让VCNTL[3]进行高低电平翻转,进而测量出VID[5:0]

希望工程师们可以给予解答,非常感谢。