# HD44780 LCD-Interface

The HD44780 is a de facto or quasi-standard for the control of alphanumeric dot matrix LCDs, which was developed by Hitachi several years ago. The controller has a display data RAM (DDRAM) that can store up to 80 8-bit characters. The content of the RAM is shown on a dot-matrix display via a 16-line, 40-column LCD driver that can be expanded with additional display controllers or corresponding drivers (e.g. HD44100).

![](https://2000520835-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M30Kjw_h8cad4uS2SeH%2F-M3823UQLMSlQfDhiLxV%2F-M382FrWijZjImnWog0s%2FVHDL_LCD_English\(1\).png?alt=media\&token=99d265eb-b941-4ea7-bcb3-92e814fd70b6)