National Instruments NI 6013, Руководство пользователя

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Chapter 4 Connecting Signals
NI 6013/6014 User Manual 4-30 ni.com
Figure 4-22 shows the timing for SCANCLK.
Figure 4-22. SCANCLK Signal 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
or a sequence of eight pulses in the hardware-strobe mode. An external
device can use this signal to latch signals or to trigger events. In the
single-pulse mode, software controls the level of EXTSTROBE*. A 10
µ
s
and a 1.2
µ
s clock are available for generating a sequence of eight pulses in
the hardware-strobe mode.
Figure 4-23 shows the timing for the hardware-strobe mode
EXTSTROBE* signal.
Figure 4-23. EXTSTROBE* Signal Timing
Note EXTSTROBE* cannot be enabled through NI-DAQ.
t
w
= 400 to 500 ns
t
d
= 50 to 100 ns
CONVERT*
SCANCLK
t
d
t
w
V
OH
V
OL
t
w
t
w
t
w
= 600 ns or 500 s