Chapter 3 Hardware OverviewPCI-6110E/6111E User Manual3-2 ©National Instruments CorporationFigure 3-2 shows a block diagram for the PCI-6111E board.Figure 3-2. PCI-6111E Block DiagramAnalog InputThe analog input section for the 611X E board is software configurable.You can select different analog input configurations throughapplication software. The following sections describe in detail each ofthe analog input categories.Input ModeThe 611X E board supports only differential inputs (DIFF). The DIFFinput configuration provides up to four channels on the PCI-6110Eboard and up to two channels on the PCI-6111E board.A channel configured in DIFF mode uses two analog channel input lines.One line connects to the positive input of the board programmable gaininstrumentation amplifier (PGIA), and the other connects to the negativeinput of the PGIA. For more information about DIFF inputTimingPFI / TriggerI/O ConnectorRTSI BusPCI BusDigital I/O (8)EEPROM+CH0Amplifier–CalibrationMuxAI CH0MuxCH0LatchAnalogTriggerCircuitry2Trigger LevelDACsTrigger124CalibrationDACsDAC0DAC1CH012-Bit ADCDAQ - STCAnalog InputTiming/ControlAnalog OutputTiming/ControlDigital I/OTriggerCounter/Timing I/ORTSI BusInterfaceDMA/IRQBusInterfaceDACFIFO Data (32)Address/DataControlData (32)AnalogInputControlEEPROMControlDMAInterfaceFPGADAQ-STCBusInterfaceAnalogOutputControlI/OBusInterfaceMiniMITEGenericBusInterfacePCIBusInterfaceIRQDMAAO ControlCH0+CH0-+CH1Amplifier–AI CH1MuxCH1Latch12CH112-Bit ADCCH1+CH1-AI ControlData (16)Data (16)ADCFIFO
