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I/O module carries interruptible event sense

Posted: 24 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:I/O module interface? WinSystems Pico? digital?

The PCO-UIO48-G from WinSystems is a 48-point digital I/O interface with interruptible event sense. Pico-I/O modules are designed to offer low cost, I/O expansion for Pico-ITXe single-board computers. One of the product's key features is that it can monitor 24 of the rising and falling digital edge transitions, latch them, and then signal the host processor that a change of input status has occurred. This 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.

The PCO-UIO48-G's I/O controller is based 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. Each line's transition is latched so that even short duration pulses will be recognized. The module requires only +3.3V; however, an optional onboard regulator is available to allow it to be powered from +5Vdc.

Pico-I/O is based on the SUMITTM (Stackable Unified Module Interconnect Technology) connector that was developed and standardized by the Small Form Factor Special Interest Group (SFF-SIG). SUMIT is an electromechanical connectorization specification that enables stacking of common serial and legacy chip set expansion buses on I/O modules for next generation embedded systems products.

The PCO-UIO48-G is available from stock to two weeks. It lists for $59. A depopulated version with 24 lines, called the PCO-UIO24-G, lists for $49.

- Richard Nass
embedded.com





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