On Thu, Dec 5, 2013 at 9:22 AM, joem joem@martindale-electric.co.uk wrote:
in case that is not clear, that is "high" voltage of 2.0 volts, threshold of 1.4 V and "low" voltage of 0.8 V.
is that clear?
Still feeding the confusion.
well, regardless, it's too late. there will be no further changes (except one, related to adding a reset line, and that's more than i'm comfortable with).
e.g. if you remember HNO's fix for RS232 problem.
... and it was fixed. no 3.3v line required.
It requires connection to the pull up point.
no it does not. the diode does the job.
It was labelled as the 3.3V line - with the implicit meaning that it was the pull up point that all EEs would know about. (All EEs would also implicitly know that connecting to a substitute arbitrary 3.3V point is utterly meaningless.)
a 3.3v point is not necessary.
So, without a pull up point for GPIO lines,
which will not be provided.
certain types of electrical and electronic problems cannot easily be solved.
tough. they can be solved. "ease" has nothing to do with it. it's too late.
Instead of calling it 3.3V line, you could call it GPIO_PULL_UP line
the answer's no. it's too late. this should have been raised 18-24 months ago.
there will be no changes.
sorry.
l.