serial LCD interface for PIC


Posted on Sep 27, 2012

If you are developing applications for the PIC mcu, and miss debugging tools, or don't have enough I/O pins for a parallel LCD interface in your design, this serial interface can help printing debug messages and/or reduce the pin count. This version uses a Hitachi HD44780 compatible LCD module in 4-bit mode.


serial LCD interface for PIC
Click here to download the full size of the above Circuit.
serial LCD interface for PIC - image 1
Click here to download the full size of the above Image.

My default PIC pins for the interface connection are RB4 (EN), RB5 (CK), RB6 (DA). I choose these pins due to PCB layout simplicity on the 18 pin devices. It is the task of your application to correctly initialize the TRIS bits of the used port pins!




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