Chapter 10 Miscellaneous Functions©National Instruments Corporation10-9DAQ-STC Technical Reference ManualThe G_OUT0/RTSI_OUT, OSC, and TEST_IN pins are not included in the internal gate tree.10.7 Pin InterfaceThe I/O signals related to the Miscellaneous Functions are listed in the following table. Anasterisk following a pin name indicates that the default polarity for that pin is active low.Pin Type Notation:IU Input, pull up (50 kΩ)O4TU Output, 4 mA sink, 2.5 mA source tri-state, pull up (50 kΩ)IS Input, TTL Schmitt triggerO9TU Output, 9 mA sink, 5 mA source tri-state, pull up (50 kΩ)O9 Output, 9 mA sink, 5 mA sourcePFI8/G_SRC0 PFI9/G_GATE0 G_UP_DOWN0 G_UP_DOWN1RTSI_TRIGGER0 RTSI_TRIGGER1 RTSI_TRIGGER0 RTSI_TRIGGER1RTSI_TRIGGER2 RTSI_TRIGGER3 RTSI_TRIGGER2 RTSI_TRIGGER3RTSI_TRIGGER4 RTSI_TRIGGER5 — —Table 10-3. Pin InterfacePin Name Type DescriptionANALOG_TRIG_DRIVE O4TU Analog Trigger Drive—This pin controls whether theboard’s trigger line should be output or input. This bit isdriven directly from a control register on the DAQ-STC.Related bitfield: Analog_Trigger_Drive.ANALOG_TRIG_IN_HI IU Analog Input Trigger High Voltage Reference—This pinindicates that the analog trigger waveform has exceededthe HI voltage reference. Source: This input is typicallyfed from an analog comparator on the board.ANALOG_TRIG_IN_LO IU Analog Input Trigger Low Voltage Reference—This pinindicates that the analog trigger waveform has droppedbelow the LOW voltage reference. Source: This input istypically fed from an analog comparator on the board.Table 10-2. Test Mode Input Pin Pairs (Continued)Pin Pairs Pin Pairs
