LCD port bit choices

[Dave]

rossfree, As long as you can have 4 i/o port pins in a row starting at portx.0 or portx.4 then you have got it. The control pins can be placed on any of the other i/o pins. This is in the manual.....

Dave Purola,
N8NTA

[DynamoBen]

Dave I'm with you in this "problem." The answer you received from rossfree is correct. The data lines need to start at 0 or 4 on one of the three ports. RS and E can go anywhere.

I too have a project using the USART, analog inputs, external interrupt, and much of port B. I ended up using PortB.4-7 for the datalines, PortB.3 for E, and PortC for RS. When I laid out the PCB this kept everything on one layer w/o overlap (vias). BTW I'm also using CCP1 to control contrast via PWM.

Hope this helps.

[rossfree]

Thanks guys,

That clears things up. And I'll get back into that manual.

Thanks again!

Ross