Introduction
The low cost PSD211R family integrates high-performance and user-configurable blocks of EPROM and programmable logic into one part. The PSD211R products also provide a powerful microcontroller interface that eliminates the need for external “glue logic”. The part’s integration, small form factor, low power consumption, and ease of use make it the ideal part for interfacing to virtually any microcontroller.

The major functional blocks of the PSD211R include:
    • Two programmable logic arrays
    • 256 Kb of EPROM
    • Input latches
    • Programmable I/O ports
    • Programmable security