LCD interfacing using Extended I/O (cpld_xio)

Compatibility: Eagle 100

A complex programmable logic device is a programmable logic device with complexity between that of PALs and FPGAs, and architectural features of both. The building block of a CPLD is the macro cell, which contains logic implementing disjunctive normal form expressions and more specialized logic operations.

Input/Output, or I/O, refers to the communication between an information processing system, and the outside world possibly a human, or another information processing system. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it.

A liquid crystal display (LCD) is a thin, flat panel used for electronically displaying information such as text, images, and moving pictures.

This example tests extended I/O and LCD interfaces on CPLD.