Chapter 3
Connecting the Signals
©
National Instruments Corporation
3-33
DAQPad-MIO-16XE-50 User Manual
Figure 3-21.
SCANCLK Signal Timing
EXTSTROBE* Signal
EXTSTROBE* is an output-only signal that generates either a single
pulse in the single-pulse mode or a sequence of eight pulses in the
hardware-strobe mode. These two modes are software selectable. An
external device can use this signal to latch signals or to trigger events.
In the single-pulse mode, software sets the level of the EXTSTROBE*
signal high or low. Both a 10 µs and a 1.2 µs clock are available for
generating a sequence of eight pulses in the hardware-strobe mode.
Figure 3-22 shows the timing for the hardware-strobe mode
EXTSTROBE* signal.
Figure 3-22.
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 5
s
