Forum Discussion
Altera_Forum
Honored Contributor
8 years ago --- Quote Start --- Oh thanks, but i'm still i bit confused about it. So i have to use the following pins: VSS, VDD, RW, E, and what else should i use? Am i even correct? --- Quote End --- Yes, for those listed. VSS would be connected to ground. VDD would be connected to (probably) +5V (or maybe +3.3V). Depends on your LCD module. You need a datasheet for it. RS is an input; needs to connect to an FPGA output. R/W is an input; needs to connect to an FPGA output. E is an input; needs to connect to an FPGA output. DB[0:3] are bidirectional; needs to connect to FPGA bidir. DB[4:7] (optional) are bidirectional; needs to connect to FPGA bidir. VO is an analog input / LCD contrast. Connect to the wiper pin on a 10K variable resistance. Other two pins to VDD and VSS. Attached is a PDF datasheet of a pretty standard 8x2 character LCD display from CrystalFontz for reference.