ADLINK PCI-8164 - Manual (Page 159)

Operation Theory 147
4.11 PXI Trigger Bus (PXI-8164 only)
There are eight general trigger channels in PXI bus. They are
called PXI_TRG[0] to PXI_TRG[7]. All channels can be pro-
grammed as input or output. These trigger channels are for inter-
board control synchronization.
For example, if there are two PXI cards, card A and card B in one
system, Card A will send a trigger signal through PXI_TRG to card
B and card B is waiting for this signal to do some action. There is
another dedicated channel for trigger input and output, They are
called PXI_STAR(input) and STAR_TRG(output). They can not be
programmed as input or ouput individually. They can only be
enabled or disabled.
This section describes the PXI_TRG’s arrangement in PXI-8164
and how it is used. The following figure is the block diagram of PXI
bus.