
iv GX5280 User Guide
Verifying the Installation........................................................................................................................................17
Initializing DIO Boards......................................................................................................................................17
Chapter 4 - Theory of Operation..............................................................................................................19
Architecture ............................................................................................................................................................19
Masters and Slaves..................................................................................................................................................20
I/O Channels...........................................................................................................................................................20
Channel is set to be in output mode ...................................................................................................................21
Channel is set to be in input mode .....................................................................................................................21
Clock and Strobe Signals........................................................................................................................................22
A timing diagram of the CLK and Strobe signals is shown in Figure 4-4..............................................................23
Memory Management.............................................................................................................................................23
Vector Program Control..........................................................................................................................................24
Vector Program Control States...............................................................................................................................26
Halt State ................................................................................................................................................................26
Pause State..............................................................................................................................................................26
Run State.................................................................................................................................................................26
Trigger Command...................................................................................................................................................27
PC (Software) Trigger ............................................................................................................................................27
External Trigger......................................................................................................................................................27
External Trigger Control Line............................................................................................................................27
External Event Lines..........................................................................................................................................27
PXI Trigger Bus Line Trigger.................................................................................................................................28
Pause Command .....................................................................................................................................................28
PC (Software) Pause...............................................................................................................................................28
External Pause ........................................................................................................................................................28
External Pause Control Line ..............................................................................................................................28
External Pause Event Lines................................................................................................................................29
PXI Trigger Bus Line Pause ...................................................................................................................................29
Other Features of the GX5280 Board .....................................................................................................................29
X Register ..........................................................................................................................................................29
B Clock Source ..................................................................................................................................................29
Appendix A - Connectors and Cables.....................................................................................................31
Overview.................................................................................................................................................................31
DIO Connectors......................................................................................................................................................32
J1 I/O TTL Signals (68-Pin to UUT)......................................................................................................................33
J2 I/O LVDS Signals (68-Pin to UUT)...................................................................................................................34
J3 Timing Signals Connector..................................................................................................................................35