National Instruments NI USB-621x manual 175

when to use with ground-referenced signal sources, 5-10

NRSE connections

using with floating signal sources, 5-8 using with ground-referenced signal

sources, 5-13

when to use with floating signal sources, 5-4

when to use with ground-referenced signal sources, 5-10

O

on-demand acquisitions, 4-9 edge counting, 9-2 timing, 4-9

order of channels for scanning, 4-7 other software, 1-2

output signal glitches, B-3

output signals, minimizing glitches, 7-2 overview, 2-1

P

pause trigger, 9-31 period measurement, 9-6

buffered, 9-7 single, 9-7

PFI, 10-1

connecting input signals, 10-3

exporting timing output signals using PFI terminals, 10-3

filters, 10-4

I/O protection, 10-6

programmable power-up states, 10-6 using terminals as static digital I/Os, 10-3 using terminals as timing input

signals, 10-2

PFI terminals as static digital I/Os, 10-3 pin assignments. See pinouts

Index

pinouts

counter default, 9-29 device, 1-3USB-6210,A-1USB-6211,A-4USB-6215,A-4USB-6218,A-7

pins, default, 9-29

position measurement, 9-15 power, +5 V, 3-2

power, +5 V input, 3-3 power, +5 V output, 3-2power-up states, 10-6 prescaling, 9-34

programmable function interface, 10-1 programmable power-up states, 10-6 programmed I/O, 13-2

changing data transfer methods, 13-2programming

devices in software, 2-4 programming examples (NI resources), C-1 pulse encoders, 9-17

pulse generation for ETS, 9-24 pulse train generation, 9-22

continuous, 9-22pulse-width measurement, 9-5

buffered, 9-5 single, 9-5

Q

quadrature encoders, 9-15

R

reciprocal frequency measurement, 9-12referenced single-ended connections

using with floating signal sources, 5-9 when to use with floating signal

sources, 5-3

© National Instruments Corporation I-7 NI USB-621x User Manual