Lpc2000

--- In lpc2000@yahoogroups.com, "Lee Studley" <indigo_red@q...> wrote:
> Hi Bob,
> I wouldnt really say this is a hardware bug, but a documentation
> bug.

I guess that is one way to look at it.  So let me rephrase my
question:

   The LPC2106 docs contain a bug, when they state that the pins
   are readable even if an alternate funcion is enabled.

   The LPC2114 docs contain the same statement.  But is this
   another "documentation bug", or does it accurately reflect
   what the hardware actually does?

Happy now? ;-)
 
> Can you switch to GPIO, then get the level, then back as needed? 
> Or will this cause a glitch.

No.  I cannot think of any way to do that reliably.  There is always
a chance of missing a transition.

The only solution I can think of, is to dedicate additional pins,
and have the signal go to a capture pin and also to a GPIO pin.
Since I will have eight capture signals, that means I need to give
up eight other pins, that I would rather use for other purposes.
But I need to know before I etch a board, which is why I am asking.

    -bob