AnsweredAssumed Answered

PCA9539PW Output issue

Question asked by Yashveer Ramparsad on Jan 18, 2018
Latest reply on Jan 23, 2018 by David Diaz Marin

Currently using the PCA 9539PW IO expander. Now I can communicate with it and tell it to output individual outputs (works perfectly). However problems arise when I wish to write to pins 7 and 11. What actually happens is that Pin 8 and 11 get set instead. Then when I set Pin 8 and 11(just to see what happens), Pin 7, 8 and 11 are all set! 


That seems to me like it is erroneous behavior. Like I mentioned before, I can set individual pins, problems arise when I wish to set 2 pins at a time!