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大家好、在 F28075 controlCARD PCB 文件中、似乎有一个铜区域(下面的粉色矩形)连接到 F28075的 VSSOSC 引脚。(我不熟悉软件焊盘、所以我不确定)。
因此、如果需要外部晶体、则该引脚需要覆铜、对吧? 为什么?