21 Apr
2012
21 Apr
'12
2:51 p.m.
On 21 Apr 2012 at 20:29, Tony Duell wrote:
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.
Unless you stick a copy of the PCI source code ot
every drive chassis,
I know which I'd rather be faced with...
At my age, I'll be dead before I need to revisit the code. Still,
the code is small enough that I could probably stick an optically-
readable bit of bar code on it. Of course, the datasheet for the
drive will long have disappeared into the internet netherworld.
--Chuck