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现象：使用该芯片控制6个按键和一个5位的数码管，测试时原本是正常显示的，测试时没有使用蓝牙功能，突然数码管显示5个8，即数码管全亮，按键也无反应，重新上电后故障仍然存在，重新烧写又能正常运行。
是 没有额外的操作
