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AFE4490加电后AFE_RESETZ引脚有振荡信号输出

Other Parts Discussed in Thread: AFE4490

AFE4490仿制的参考设计,加电后,测量AFE_CLKOUT有时钟振荡信号输出,但发现AFE_RESETZ引脚也有振荡信号输出,信号幅度1~2V间。

按照规格要求,将AFE_RESETZ与MCU的GPIO端口连接并拉高信号,振荡信号仍存在。

注:仅加电,并未通过SPI写任何寄存器。