© National Instruments Corporation 2-1 NI PCI-1405 User Manual2Hardware OverviewThis chapter presents an overview of the hardware functions on theNI 1405 and explains the operation of each functional unit making upthe NI 1405.Functional OverviewThe NI 1405 features a high-speed data path optimized for the acquisitionand formatting of video data from analog monochrome and color cameras.The block diagram in Figure 2-1 illustrates the key functional componentsof the NI 1405.Figure 2-1. NI 1405 Block DiagramAnalog Video VideoDecoderExternal TriggerPCI BusIMAQ SDRAMMemoryInterfaceSDRAMPCI Interface andScatter-GatherDMA ControllerAcquisition,ROI, andControl