Chapter 4
Signal Connections
©
National Instruments Corporation
4-29
PCI-MIO E Series User Manual
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 the
EXTSTROBE* signal. 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 4-14 shows the timing for the hardware-strobe mode
EXTSTROBE* signal.
Figure 4-14. EXTSTROBE* Signal Timing
TRIG1 Signal
Any PFI pin can externally input the TRIG1 signal, which is available
as an output on the PFI0/TRIG1 pin.
Refer to Figures 4-11 and 4-12 for the relationship of TRIG1 to the
DAQ sequence.
As an input, the TRIG1 signal is configured in the edge-detection mode.
You can select any PFI pin as the source for TRIG1 and configure the
polarity selection for either rising or falling edge. The selected edge of
the TRIG1 signal starts the data acquisition sequence for both
posttriggered and pretriggered acquisitions. The PCI-MIO-16E-1,
PCI-MIO-16E-4, and PCI-MIO-16XE-10 support analog triggering on
the PFI0/TRIG1 pin. See Chapter 3, Hardware Overview, for more
information on analog triggering.
t w t w
VOH
VOL
t w = 600 ns or 5
µ
s