手头有一块相同的板卡,可以正常使用调试;
这块为刚生产的,唯一区别在于芯片主频从1.0G换为1.25G;
现象:PLL失败,设为BYPASS模式可以通过别的测试,DDR初始化成功。
目前检查了各个电源电压正常,CORECLK正常,AVDDA1正常,且拆去该电压报错现象不一直,排除芯片虚焊;
下面该如何继续没有头绪,请各位帮忙
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