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启动后再配置成输出，防止漏电或亚稳态，这样行吗？
你好，
不同功能的pin脚，处理方式稍有差别，请参考以下链接，
http://processors.wiki.ti.com/index.php/AM335x_Schematic_Checklist#Unused_Signals
配置成输出我觉得是个不错的主意，最好在配置个上拉或下拉吧，这样管脚能够有个确定的电平
如果是clock脚，最好不要配成输出，否则会有射频出来影响板子的稳定性
