Aitech Defense Systems Inc. (Chatsworth, CA) offers a compact, multi-I/O PMC for I/O environments. The low-power, single-width M705 features up to five dual-channel, dual-redundant MIL-STD-1553B channels, 16 ARINC-429 receive channels and eight ARINC-429 transmit channels, up to six RS-232/422/485 serial channels and eight opto-isolated digital discrete input channels, all of which reduce the number of I/O cards when developing subsystems. Additional board options include an ARINC 708 Weather Radar interface contained as VHDL within the large onboard FPGA.

The M705 is suitable for use in tactical avionics platforms such as F-18 or V-22 mission computers, as well as mission recorders. The MIL-STD-1553 channels support BC/RT/MT operation modes and offer 128K bytes of dual-port RAM per channel. All ARINC-429 channels fully comply with the AEEC adoptions of the ARINC-429 specifications and provide high and low speed operation, 100 kbps and 12.5 kbps, respectively. The six UART channels feature a global interrupt source register and two of the channels can provide full modem flow control lines. The discrete input channels serve as general purpose I/O ports that connect to the GPIO FPGA, but are primarily used to externally assign the RT address to the MIL-STD-1553 channels.

The M705 has a 32-bit/66 MHz PCI 2.2 interface that supports both +5V and +3.3V PCI universal signaling levels. The conduction-cooled version per ANSI/VITA 20-2001 routes all signals to the rear P4 connector and the IEEE 1386-2001 air-cooled version can be equipped with connectors for front panel I/O signal routing. The PMC has a temperature range of -55°C to +85°C and is available with software in rugged and military levels of ruggedization.

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This article first appeared in the May, 2008 issue of Embedded Technology Magazine (Vol. 32 No. 5).

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