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Chapter 3
Hardware Overview
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National Instruments Corporation
3-11
Timing Signal Routing
The DAQ-STC provides a very flexible interface for connecting timing
signals to other boards or external circuitry. The 611X E board uses the
RTSI bus to interconnect timing signals between boards, and the
Programmable Function Input (PFI) pins on the I/O connector to
connect the board to external circuitry. These connections are designed
to enable the 611X E board to both control and be controlled by other
boards and circuits.
signals to other boards or external circuitry. The 611X E board uses the
RTSI bus to interconnect timing signals between boards, and the
Programmable Function Input (PFI) pins on the I/O connector to
connect the board to external circuitry. These connections are designed
to enable the 611X E board to both control and be controlled by other
boards and circuits.
There are a total of 13 timing signals internal to the DAQ-STC that can
be controlled by an external source. These timing signals can also be
controlled by signals generated internally to the DAQ-STC, and these
selections are fully software configurable. For example, the signal
routing multiplexer for controlling the CONVERT* signal is shown in
Figure 3-11.
be controlled by an external source. These timing signals can also be
controlled by signals generated internally to the DAQ-STC, and these
selections are fully software configurable. For example, the signal
routing multiplexer for controlling the CONVERT* signal is shown in
Figure 3-11.
Figure 3-11. CONVERT* Signal Routing
RTSI Trigger <0..6>
PFI<0..9>
CONVERT*
Sample Interval Counter TC
GPCTR0_OUT
PCI_E.book Page 11 Thursday, June 25, 1998 12:55 PM