我最近调试时发现当给DM642的PLL-VDD供电的时候,芯片会出现嗡嗡的响,同时原本为3.3V的电压也被降为1.8V。不给PLL-VDD管脚供电则不会出现异常。有遇到过类似问题的可以帮小弟一把,谢谢了
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