3 Sep
2011
3 Sep
'11
2:34 p.m.
It may be the chip, but what are the control inputs
doing? Pin 15 is a
global
enable to that chip, if it's high, the chip is
disabled, and all ouptus
are forced
high (IIRC). Often this is not used, and pin 15 is
tied to ground, but
it's best to
check.
Pin 1 selects between the 1 possible inputs for each multiplexer section.
Is this in the right state to pass the data through?
Just checked the printset, that shows pin 15 tied to ground. Good job really
because I have already ordered the part! Thanks for telling me though, I
will have to be more careful next time.
Regards
Rob