4051 pins reading from wrong input?


i have 2 4051s reading digital i/o ports 7,8,9. output a0, a1.

the 4051 that's connected a0 works across 8 inputs. 4051 that's connected a1 works 4,5,6,7, , they're registering 0,1,2,3.

schematic attached.

i love ideas on try. have switched chips make sure isn't chip. i'm @ point it's program, can't find hole there either.

thanks in advance.

ok, have swapped chips; now swap wires a0 , a1, changing nothing else.  if problem migrates other chip, in code.  if stays chip, in wiring.

your comment on drawing doesn't match have typed - it?

you need post code if want find problem you.


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