HELP!! FS6511 FS0B pin always be low

[snow]

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......

[flyskyr丶]

hello，

I have the same problem.Can you tell me how to deal with it.

Thanks!

[flyskyr丶]

 Now it‘s fine. Because of too large pull-up resistor .

[guoweisun]

Thanks for your interesting in NXP products.

Could you please setup a ticket with your schematic attached ASAP?