Marvin Test Solutions GX5280, User Manual

Page: 37 / 50

Chapter 4 - Theory of Operation 29
External Pause Event Lines
The P mask and event registers can be used to create conditional pauses that depend on external event lines. The 16
external event lines are ANDed with pre-defined masks and compared with pre-defined events in register P.
The external/internal events pause function in the board is shown in Figure 4-9:
P
Mask
Reg.
P
Event
Reg.
C
o
m
p
External
Events
Bus
PC
Bus
Pause
Figure 4-9: External Events Pause Block Diagram
PXI Trigger Bus Line Pause
Controlled by software the GX5280 can be programmed to Pause on any one of the PXI Trigger Bus Lines. The
programmed selected PXI Trigger Bus Line can then be Enabled/Disabled through software control achieving
additional control over the PXI Trigger Bus event.
Other Features of the GX5280 Board
X Register
The GX5280 board has a 16-bit register that can be set by software to simulate the external event lines.
B Clock Source
The GX5280 Board has another programmable clock that may be used externally. This clock can be programmed
from 1MHz to 200MHz.
This clock CLKB is independent. It is not defined at power up and once programmed, it will not change (even by
reset) until programmed to another value.