I am using the Safety Power System Basis Chip fs6511.In normal stituation,the FS0B should be high voltage.But now the FS0B always be low, and the unnormal thing is that the WD_ANSWER register FSxB bit is 0. It seems mean that there is no fail-safe event but the FS0B still be low.
I have made the FS0B pin to pull-up. The faults I had configured to not impact the FS0B.
And I release the FS0B at first. But I am not sure whether FS0B should release every watchdog window.
This is the register that I read. FS0B is low.
Who can help me......