DDC01.1-K100a
模拟输出接地模拟输出电压参考此节点。DACOUT AOGND输出模拟输出通道0至7—这些引脚提供相应通道的电压输出。DGND--数字接地该引脚为输入/输出连接器处的数字信号以及+5 VDC电源提供参考。DIO DGND输入或输出数字输入/输出信号—DIO6和7可分别控制通用计数器0和1的上/下信号+5 V DGND输出+5 VDC电源这些引脚为高达1 A的+5 V电源熔断。保险丝自动复位。EXTREF AOGND Input External Reference这是模拟输出电路的外部参考输入。外部选通*DGND输出外部选通此输出用于控制SCXI设备。PFI0 DGND输入PFI0作为输入，这是可编程功能输入（PFI）之一。PFI信号将在本章后面的定时连接部分进行说明。PF<0不能输出。PFI1 DGND输入PFI1作为输入，这是PFI之一。PFI1不能是输出。PFI2 DGND输入PFI2作为输入，这是PFI之一。PFI2不能是输出。PFI3/GPCTR1\U源DGND输入输出PFI3/计数器1源作为输入，这是PFI之一。作为输出，这是GPCTR1\U源信号。该信号反映连接到通用计数器1的实际源。PFI4/GPCTR1\U门DGND输入输出PFI4/计数器1门作为输入，这是PFI之一。作为输出，这是GPCTR1\U门信号。该信号反映连接到通用计数器1的实际门信号。GPCTR1\U OUT DGND输出计数器1输出此输出来自通用计数器1输出。

AOGND — — Analog Output Ground—The analog output voltages are referenced to this node. DACOUT AOGND Output Analog Output Channels 0 through 7—These pins supply the voltage output of the respective channel. DGND — — Digital Ground—This pin supplies the reference for the digital signals at the I/O connector as well as the +5 VDC supply. DIO DGND Input or Output Digital I/O signals—DIO6 and 7 can control the up/down signal of general-purpose counters 0 and 1, respectively. +5 V DGND Output +5 VDC Source—These pins are fused for up to 1 A of +5 V supply. The fuse is self-resetting. EXTREF AOGND Input External Reference—This is the external reference input for the analog output circuitry. EXTSTROBE* DGND Output External Strobe—This output is used for controlling SCXI devices. PFI0 DGND Input PFI0—As an input, this is one of the Programmable Function Inputs (PFIs). PFI signals are explained in the Timing Connections section later in this chapter. PF<0 cannot be output. PFI1 DGND Input PFI1—As an input, this is one of the PFIs. PFI1 cannot be an output. PFI2 DGND Input PFI2—As an input, this is one of the PFIs. PFI2 cannot be an output. PFI3/GPCTR1_SOURCE DGND Input Output PFI3/Counter 1 Source—As an input, this is one of the PFIs. As an output, this is the GPCTR1_SOURCE signal. This signal reflects the actual source connected to the general-purpose counter 1. PFI4/GPCTR1_GATE DGND Input Output PFI4/Counter 1 Gate—As an input, this is one of the PFIs. As an output, this is the GPCTR1_GATE signal. This signal reflects the actual gate signal connected to the general-purpose counter 1. GPCTR1_OUT DGND Output Counter 1 Output—This output is from the general-purpose counter 1 output.