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这个FLT FAULT是如何产生的，我看PMBUS协议上说STATUS_MFR_SPECIFICI寄存器里面的值都是Manufacturer Defined，是不是用户无法改变，是固件里面的信息么，但是在UCD92xx Digital PWM System Controller PMBus Command Reference中又讲到该FLT 位是 External current fault (paged），外部电流错误。这里指的外部电流具体指什么呢？求大神解答
