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我使用DS90UB914A-CXEVM调试913设备,pass稳定常亮,latch-pass和latch-lock都是稳定常亮的,但是lock一直闪烁,示波器看是只有高电平脉冲,而且间隔时间不是固定的。可能会是什么问题呢?另外,DS90UB914A-CXEVM这个开发板输出的是5v,不是12v吗?