Chapter4 ConnectingSignals
NI6013/6014 User Man ual 4-30 ni.com
Figure 4-22 shows the timing for SCANCLK.
Figure4-22. SCANCLKSignal Timing
Note When using NI-DAQ,SCANCLK polarity is low-to-high and cannot be changed
programmatically.
EXTSTROBE* Signal
EXTSTROBE*is an output-only signal that generates either a single pulse
ora s equence ofei ghtp ulsesi n the hardware-strobe mode. Ane xternal
device can use this signal to latch signals or to trigger events. In the
single-pulsemode, soft ware controls the level of EXTSTROBE*. A 10 µs
anda 1.2 µs clock are available for generating a sequence of eight pulses in
the hardware-strobe mode.
Figure 4-23 showsthe timing for the hardware-strobe mode
EXTSTROBE*signal.
Figure4-23. EXTSTROBE*Signal Timing
Note EXTSTROBE*cannot be enabled through NI-DAQ.
tw=400 to 500 ns
td=50to100ns
CONVERT*
SCANCLK
td
tw
VOH
VOL twtw
tw=600 ns or 500 s