![]() There are HD44780 LCD modules that can display more than eighty characters, however, they actually use more than one controller chip and have a different 16 (or more) connection pinout. You can get HD44780 LCD modules that can display only a few characters, and others that can show as many as eighty, either on one or more lines these display modules all use a standard 14 connection pinout with one or two additional connections if there is a backlight (usually an LED). ![]() This is especially useful when, for e.g., you are interfacing an LCD module to a microcontroller that has few I/O. These parallel intelligent LCDs are easy to use to the point that for testing purposes you can get one to display characters by using just switches! They are usually used in either 4 or 8-bit mode with the 4-bit mode requiring that both halves of the 8-bit data be sent one after another but having the advantage that fewer connections are needed. The 'HD44780' and compatible intelligent LCD modules use a HD44780 controller chip and are able to display characters only and are very commonly used in a wide range of electronic devices such as in printers, vending machines and much more.
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