port selection for LCD

hayee · Joined: 05 Sep 2007 Posts: 252

Hi,
Can I use any of the port for LCD connections or there is any restriction (in most cases I have seen that port D is using for LCD)?
I am using pic16f877A and I want to use 4-bit interfacing.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Read the instructions for the Flex LCD driver. It lists the restrictions on
the i/o pins.

http://www.ccsinfo.com/forum/viewtopic.php?t=24661

hayee · Joined: 05 Sep 2007 Posts: 252

What about if I change port bits which are using for LCD from "port D" to "port B". Will it work?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Don't use pins B6 and B7, because they are normally used by the ICD
debugger.

hayee · Joined: 05 Sep 2007 Posts: 252

Hi,
I have purchased 20*2 LCD from a NewHaven Display.The number of lcd is (NDH-0220DZ-NSW-BBW). I want to know that can I use any of the lcd driver or not?
Is your flex lcd driver work with this?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Yes, it's a normal LCD module.

Make sure you put 0.5 volts on the "Vo" pin, to set the contrast voltage.