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请问是被拉到3v还是2.7v？1.8v被强制拉到2.7v是因为1.8V上的电容不够，和3.3V上电爬坡太慢造成的，请看下面的勘误表。
Advisory 2.3.18 DVDD18 Can Pull Up to 2.7V When Using Dual-Voltage IOs at 3.3V www.ti.com/.../sprz303h.pdf
