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TMS320C6713B为什么有时候Boot不成功。

问题描述:

                自制的TMS320C6713的板子,有时候上电boot不能起来,有的时候却可以。但是我们单独复位1.2v核电压,boot就成功了。上电一瞬间,3.3V和1.2V同时上电,不知道这么设计是否正确。上电是否有顺序?