ADLINK PXI-7901 - Manual (Page 24)

18 • Operation Theorem
Figure 10: Available signal sources for Star Trigger
4.6 Auxiliary Digital I/O
The eight auxiliary digital I/O lines on ADLINK Switch Modules provide
versatility to users’ control applications. Each digital I/O line can be input, output
or tri-stated. When in output mode, users can still read back the actual logic-
level on the I/O line. All digital lines are pulled-up to 5V with 10k ohm input
resistance.
Note that AUX[2..0] are dual function pins, driving these pins while enabling
handshaking or emergency shutdown functions, may falsely trigger the Switch
Module or external instruments.
Figure 11: Auxiliary Digital I/O Function Block
Star Trigger Out Trigger Bus [7…0]
Trigger In Signal
Scanner Adv. Signal
Software Trigger
WDT Overflow
SHDNn
AUX [7…0]
Bus-Switch
and Protection
Circuit
Tri-state
Control
Feedback from output
AUX Pin DO
DI
10K
Ω
5V
DC