Chapter 3
Hardware Overview
©
National Instruments Corporation
3-7
RTSI Triggers
The seven RTSI trigger lines on the RTSI bus provide a very flexible
interconnection scheme for any device sharing the RTSI bus. These
bidirectional lines can drive any of eight timing signals onto the RTSI bus
and can receive any of these timing signals. This signal connection scheme
is shown in Figure 3-3 for PCI devices and Figure 3-4 for PXI devices.
Figure 3-3.
PCI RTSI Bus Signal Connection
RTSI Bus Connector
switch
RTSI Switch
Clock
Trigger
7
DAQ-STC
TRIG1
TRIG2
CONVERT*
UPDATE*
WFTRIG
GPCTR0_SOURCE
GPCTR0_GATE
GPCTR0_OUT
STARTSCAN
AIGATE
SISOURCE
UISOURCE
GPCTR1_SOURCE
GPCTR1_GATE
RTSI_OSC (20 MHz)
