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National Instruments 779636-01 Digital I/O Device 

National Instruments part number 779636-01 is an identifying part number for the PCI-7811, a Reconfigurable Digital I/O Device with 160 Digital I/O channel and Virtex-II V1000 FPGA type. The NI 779636-01 offers TTL-compatible digital I/O channels with 4.0 mA source and sink current capabilities, each programmable for its power-on state. It allows users to configure custom measurement hardware using FPGA chips and National Instruments LabVIEW software tools. Integrated short-circuit protection safeguards up to eight output lines simultaneously. Under typical conditions, this device consumes 650 mA of current. 

Multifunction Reconfigurable I/O devices feature a reconfigurable FPGA core with fixed I/O resources for analog and digital input and output. Users can configure the FPGA to meet the specific needs of their measurement and control systems. This user-defined behavior can be implemented as an FPGA VI, creating an application-specific I/O device. The NI 779363-01 features four 68-pin VHDCI high-density female connectors for I/O connections, supporting master or slave operation in any PCI expansion slot. 

The PCI-7811 includes three DMA channels and supports Interrupts, DMA, and programmed I/O data transfer modes. It also includes an onboard clock for time-related functions. Flexible functionality enables the device to meet specific application requirements and mimic fixed I/O devices. For instance, you can configure it for three 32-bit quadrature encoders in one application and reconfigure it for eight 16-bit event counters in another. Physically, this Multifunction I/O device measures 17 cm by 11 cm (excluding connectors) and weighs approximately 112 g.