To link a standard 16×2 LCD directly with the microcontroller, for instance Arduino, you would need atleast 6 I/O pins ... for most microcontroller families via the two-line bidirectional bus (I2C-bus ...

As promised in the first part of this article, now it is time to see in detail how we can use the Alphanumeric LCD Display in our Arduino ... when compiled for Arduino UNO or Arduino Duemilanove, ...

line called for by the LCD protocol. This means you don’t lose any extra pins. Another way to uses the displays with Arduino is to use a smart controller for TFT screens.