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 thenrnsignals the host processor that a change of input statusrnhas 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.rnWinSystems based the PCO-UIO48-G's I/O controller on a Lattice FPGA programmed to support various I/O and interrupt configurations. Each I/O line is programmable for input, output, or output with read-back operation.