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无法控制换挡
您好，
您使用的供电电压是多少？您可以附上您的电路图吗？
您的输入信号是什么？输入信号幅值是多少？A0和A1电压是多少？
请注意 14号引脚Digital Common pin 的电压需处于正供电电压的8V以下，即需处于–VCC~ VCC – 8之间：
