DRV8860中开路标志位OL位一直不能清零，这是什么原因？急待解决！

Open load faults are automatically cleared whenever the corresponding output is turned on by setting the Data
register bit to ‘1’. Alternatively, a Fault Reset special command will also clear this value. In either case, once all
bits in the Fault register are clear, nFAULT is released.

手册上没有说可以在电压上升到1.2V之上后清零。而只说了可以通过打开对应通道清零，或者用重置指令清零。

并且要所有通道都清零之后，nFAULT才会恢复。

也就是说开路错误在输出一直关闭的情况下一旦发生是保持的。