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September 15, 2011     

True 16-bit PC/104 Analog I/O Module for non-DMA Systems has Filters, IRQs, Digital I/O, Ext Temp, and Autoscan Mode

Montrose, CA...Micro/sys announces the latest addition to our family of popular PC/104 stack-on embedded data acquisition modules offering 32 channels of 16-bit analog-to-digital input and 4 channels of 14-bit digital-to-analog output. Designed to address the decreasing ability of the PC/104 bus to support the growing number of non-DMA processors in the embedded Intel family, the MPC565 implements First In, First Out (FIFO) registers to organize and pass back-and-forth A/D communication. By utilizing the FIFO registers, users gain the advantage of simultaneous read/write functions at convenient intervals without tying up valuable CPU time. Significant design attention was given to maintaining a low noise analog subsystem that could deliver true 16-bit and 14-bit performance. The rigorous analog input subsystem includes programmable gain amplifiers, programmable low-pass filters, a 16-channel differential input mode (DI), and input overvoltage protection to 40V, with power on or off. The analog output subsystem includes 1-pole low-pass filters, and output buffers capable of driving cables and other highly capacitive loads. An on-board EEPROM holds calibration data that can be used for installed, end-to-end calibration of input channels.

The Autoscan mode of the analog input section adds a wealth of choices to the system designer. Various on-board or external "pacer clocks" can be used to cause periodic conversions to occur without any software intervention. An SRAM-based storage area is used to set the include/exclude control, mode (SE or DI), gain, and low-pass filter knee for each channel, individually. Once initiated, the Autoscan mode proceeds, using a 1024 deep FIFO register. FIFO flags can trigger a system IRQ to allow efficient servicing by the program.

The MPC565 also includes 12 general-purpose digital I/O lines. These flexible I/O lines can be individually set as input, output, or inputs that generate an IRQ when they transition from low to high. Fault protection is provided on all 12 digital I/O lines.

Analog input range is 10.1V or 5.05V. Analog output range is 10.1V, and all outputs are set to 0V upon power-up or reset. Input and output accuracy is .02% of full scale across the operating temperature range. The input circuitry will allow sampling of 20V p-p at 35KHz, or 5V p-p at 100KHz. The output circuitry can generate 20V p-p signals at 15KHz. Sample programs and full documentation are provided with the board.

An industrial temperature version, theMPC565-ET, is also available. The MPC565-ET has guaranteed accuracy from 40C to +85C. Both versions of the MPC565 require only a single 5V supply to operate. Line regulation on the 5V input is .001% of full scale.

The MPC565 starts at $440 in single quantity and mid $200's in OEM quantities. Turn-key development kits ship with the first unit allowing immediate out-of-the-box development. Significant OEM discounts are available on all boards. Contact Technical Sales Dept., Micro/sys, Inc., 3730 Park Place, Montrose, CA 91020, phone (818) 244-4600, FAX (818) 244-4246, email:, URL:

About Micro/sys: Since 1976, Micro/sys has been specializing in OEM high-performance, compact, low-power industrial single board computer products suited for demanding environments. Pioneering the USB movement within the stackable computer market, Micro/sys is a leading provider of Host and Client USB microcomputer and microcontroller boards. Micro/sys embedded computers are specified by OEMs in a range of applications including semiconductor processing, medical, military, mail handling, pharmaceutical, industrial marking, process control, and many other industries. For more information, visit the Micro/sys website,


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