LCD的引脚作为普通IO口用好吗

lincai

我用LCD的引脚作为普通IO口用，3V的VDD，在输出H时，电压只有2V，这是怎么回事
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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