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请问TMS320F2812的外接有源晶振的供电电压应该为多少伏？现在很多人都用3.3伏的有源晶振，串联电阻后连接到DSP的XCLKIN引脚，但是datasheet上说XCLKIN引脚的电平是1.8伏，这样是不是电平不匹配？会给DSP芯片带来什么损害吗？应该怎样选择晶振？
选用无源的就行
