I am developing a firmware for a LCD display in which PCF8579 is used as a driver IC.
In my application, everything was working fine; however, PCF8579(1) generates unnecessary signals on its segment pin (0,1,2) without writing anything in RAM area.
I have used two PCF8579 IC because i intend to drive total 78 segments; for that reason, i required two ICs.
Backplanes are driven by PCF8578 IC.
So, kindly suggest your opinion. What should i do in this situation.
If anybody have any idea about it then please let me know.
I am waiting for your response !
Nilesh Parmar : Embedded software engineer