/challenges-projects/project14/b/blog/posts/how-to-connect-an-hd4470-character-lcd-to-a-microcontroller-using-just-two-wires-i2c-uid-c4f9A typical HD4470 character LCD comes with 16 pins. If we ignore the backlight and the power pins, the 8 data and 3 control pins remain. We can address the LCD in the 8 bits or 4 bits mode. Therefore we have to consider at least 11 I/Os (8 bits) or 7 en-USTelligent Community 12