Tiny Module Delivers Pico-itxe Expansion

摘要

As standard off-the-shelf board architectures shrink, designers need simple and low-cost techniques to tack on custom I/O. Toward that end, WinSystems recently introduced the first Pico-I/O module for expanding Pico-ITXe single-board computers. The 48-point PCO-UIO48-G digital-I/O interface has an interruptible event sensor. The card monitors 24 of the rising and falling digital-edge transitions, latches them, and then signals the host processor that a change of input status has occurred. This approach is the most efficient way of sensing and signaling a CPU of real-time events without the burden of continuous polling of the digital-I/O points.