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请问AM572X 不插入SD卡上电时,串口是否会有信息打印?

Other Parts Discussed in Thread: AM5728

我们按照官方TMDSEVM572X设计了一款电路板,选择从SD卡启动UBOOT,请问AM5728在无SD卡,并且存储器没有程序时,串口是否有数据输出?如何确认处理器已经可以正常工作?正常启动时,3.3V及5V电源电流大概应该是多少?