National Instruments PCI-6023E Network Card User Manual


 
Appendix C Common Questions
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National Instruments Corporation C-5 PCI-6023E/6024E/6025E User Manual
may have pull-up or pull-down resistors connected to them as shown in
Table 4-2. These resistors weakly pull the output to either a logic high or
logic low state. For example, DIO(0) will be in the high impedance state
after power on, and Table 4-2 shows that there is a 50 k pull-up resistor.
This pull-up resistor will set the DIO(0) pin to a logic high when the output
is in a high impedance state.
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