Diamond Systems

Onyx-MM Digital I/O and Counter/Timer PC/104 Module

Extensive software control of features is the highlight of this digital I/O module featuring 48 digital I/O lines, 3 16-bit counter/timers, and 3 independent PC bus interrupt inputs. The 48 digital I/O lines on Onyx-MM are based on 2 82C55 ICs. They can be programmed for input or output in groups of 8 lines. Direct as well as strobed (latched) I/O modes are supported, and all I/O lines are connected to 10K Ohm pull-up resistors. The 3 16-bit counter/timers are based on an 82C54 IC. They are controlled through a configuration register on Onyx-MM (in addition to the standard 82C54 configuration register). The counter inputs can be switched between external signals, the on-board 4MHz clock oscillator, or counter outputs, all under software control. By using one counter's output as another counter's input, you can cascade counters in software to create a 32-bit or 48-bit counter. Onyx-MM also features programmable interrupt operations. A second software-controlled register on board configures up to 3 interrupt lines on the PC bus. Interrupts can be generated by the counter/timer outputs, digital I/O lines, or an external input line. This allows you to use a counter to generate bus interrupts at a programmed periodic rate, generate hardware interrupts under software control, or generate interrupts in response to an external event.

Manufacturer

Diamond Systems

Product sheet

Diamond Systems

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Diamond Systems Corporation, based in Sunnyvale, California, has been providing rugged, I/O-rich embedded computing solutions since 1989. The company offers a wide range of products, including single-board computers (SBCs), I/O expansion modules, Ethernet switches, and power supply solutions, all designed to operate in harsh environments.

Their products are utilized across various sectors such as transportation, energy, aerospace, defense, manufacturing, medical, and research. Diamond Systems is renowned for its innovative use of standards like PC/104 and COM Express, as well as for delivering customized solutions tailored to specific customer requirements.

Their products are engineered to withstand extreme temperatures, vibrations, and other challenging conditions, making them suitable for applications in military vehicles and industrial automation.

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