图中dc检测怎么ch1、ch2和ch3和ch4描述不一样呢，到底出错误是dc fault 还是overcurrent fault呢，现在6424工作功率一大，这个寄存器一直报错，芯片不公作。
In the figure, how is the description of ch1, ch2, ch3 and ch4 different in dc detection? Is it the dc fault or the overcurrent fault that caused the error?
