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我在使用AM3352系列芯片通过X-mode、Y-mode烧录Uboot失败后再次上电启动失败，串口也不重复打印CCCCCCCCC
现在想让芯片恢复出厂，即上电就串口输出CCCCCCCC，怎么做？
请看一下sysboot管脚是否配置成了uart boot mode，具体配置请参考TRM文档26.1.6.2.1 SYSBOOT Configuration Pins。如果配置正确，就会进入uart boot模式，串口打印ccccc。https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf
