Lpc2000

> I've been working with AVR for several years and I can tell you that
the AVR
> controllers does NOT need the pin to be forced high by hardware to
act as a
> master.
> 
> What you are describing is not possible for the LPC2106... the /SS pin
> *must* be tied high on hardware for the processor to act as a master
then
> you will need another pin to act as a /SS pin where in an AVR and a
lot of
> other processors you can control the actual /SS pin in software like you
> mentioned.

Bill just enlightened me with the issue you were describing. I wasn't
aware that the SS# pin had to be used irrelevant if there was a slave
that needed to be selected. Yes this is indeed an issue.

> Philip write that every GPIO pin is 5V tolerant if what I've been
hearing is
> correct then if you have some >3V digital TTL input on a pin that
shares the
> ADC your result on another ADC pin will be incorrect and if that's
true well
> then Philips should stop making their apprentice design their
processors !

Interesting - I wasn't aware of that problem either (again I haven't
used the ADC on the LPC series).