Gustl-
> So the only way is to connect NMI to a second pin?
I still have some,
> but on the other side :-(
>
> It would be much easier to have an inside TMS solution.
Well there is always another way, always -- and it might even be elegant once
you
find it. But the question is how long is it going to take? A GPIO pin seems like
a
fast way to get around this and move on to additional challenging areas of
the
design.
-Jeff
> Jeff Brower wrote:
>
> > Gustl-
> >
> >
> >> I have a voltage supervisor chip. If voltage drops below 3V I
get
> >> an NMI. If voltage drops below 2V I get an RESET. My NMI has to
> >> store some values into flash and wait until the reset happens.
> >>
> >> But what if I get a voltage drop to 2.5V and then it comes back
up
> >> to 3.3V again? In this case I never get the reset and must
restart
> >> manually. So I have to check the NMI pin by SW. How can I do
this?
> >
> >
> > Run NMI also to a GPIO? Since I'm sure you've already
thought
> > (wished) of that, then I might guess the device is a BGA package
and
> > the hardware designer buried all the unused GPIO pins :(
> >
> > -Jeff
> >
> >
> >
> >> Mike Dunn wrote:
> >>
> >>> Hello Gustl,
> >>>
> >>> If you don't have any backup power, I would expect that
you want
> >>> want to just pull reset on power low. keep reset low as long
as
> >>> you can. when power comes back up, keep reset low until power
is
> >>> 'good'. gee - that sounds just like a voltage
supervisor chip
> >>> :-)
> >>>
> >>> mikedunn
> >>>
> >>> Bernhard 'Gustl' Bauer <gustl@gust...>
wrote:
> >>>
> >>> Hi,
> >>>
> >>> is there any way to check the input on NMI pin?
> >>>
> >>> I have NMI connected to a power down sensor. When a brown
out
> >>> condition happens, I get a NMI, but now reset. So I must
restart
> >>> manually.
> >>>
> >>> TIA
> >>>
> >>> Gustl