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TMDSSK3358 板卡上电后串口输出乱码

lin2
Intellectual 481 points
Other Parts Discussed in Thread: AM3358

购买了一块TMDSSK3358板卡，运行Linux系统，上电后串口输入如下信息：   

 U-Boot SPL 2011.09-00381-g6309768 (Jul 30 2012 - 14:20:41)    

Texas Instruments Revision detection unimplemented    

No daughter card present    

vÿî^_¯Ö?âÝâÿ|ÑöoþßÜ¿¾}=ªýú}Â

这以后都是乱码了。

测量板卡上3.3V、1.8V、1.2V工作都正常。0.9V(DDR_VREF)电压偏低，为0.75V.手里面也没有其它好的板子了。

希望大家给些建议？谢谢！