The pause command causes the board to change its state to the Pause state and can originate from the following sources:
● PC (Software).
● External control line
● External events line
● PXI Trigger Bus Line Pause
The software Pause originates within the PC. The PC bus Pause command takes effect immediately and overrides other established trigger conditions.
External pause originates from the external pause line. An active low on this line will cause an immediate pause. The external pause overrides other pause conditions set to for the GX5295 board.
The P mask and event registers can be used to create conditional pauses that depend on the external event lines. The 8 external event lines are ANDed with pre-defined masks and compared with pre-defined events in register P.
The external/internal events pause functionality is shown in the figure below:
External Events Pause Block Diagram