22 Apr
2012
22 Apr
'12
1:53 p.m.
On 22 Apr 2012 at 19:31, Tony Duell wrote:
At less than USD$1.00 for a PIC, it's hard to rationalize on a faint
possibility. It works.
--Chuck
On 21 Apr 2012 at 20:29, Tony Duell wrote:
I do ahve a sligth moral objection to driving na interfce pin from a
custom or programmed IC. I know just about all reasonably-recent
drvies do it, but I still don;t like it. Too easy to zzap things. And
for the cost of a '38, it's trivial to avoid... More seriosuly, how do you drive the Ready/ pin
on the itneface
conenctor? Can the microcontroller sink enough current? and how do
you gate it with the drive select? If you're doing it i nthe
microcontroller, i can see problems with some controllers that
poll the drivses repeatedly looking for a change of state of the
ready/ line.
48 ma enough? I've got 8 pins, 5 of which are programmable high-
impedance/input/output and one of which is dedicated input.