VersaLogic VL-12CT96, Reference Manual

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2-18
VL-12CT96/7 Analog & Digital I/O Card
Digital I/O Interrupts
Up to four parallel port signals can be selected by jumper V13 to trigger an interrupt request when the
logic state on these signals changes state.
Jumper Jumper
Jumper Jumper
Jumper As As
As As
As
Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped
V13[3-4] Parallel Port Interrupt Select (Module 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled
In – Activity on Module 0 (J3 Pin 31) generates interrupt request
Out – Disabled
V13[5-6] Parallel Port Interrupt Select (Module 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled
In – Activity on Module 1 (J3 Pin 29) generates interrupt request
Out – Disabled
V13[7-8] Parallel Port Interrupt Select (Module 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled
In – Activity on Module 2 (J3 Pin 27) generates interrupt request
Out – Disabled
V13[9-10] Parallel Port Interrupt Select (Module 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled
In – Activity on Module 3 (J3 Pin 25) generates interrupt request
Out – Disabled
Figure 2-21. Digital Interrupts
Edge Selection
Two edge options are available: single edge, and double edge mode. Single edge mode generates an
interrupt when any of the selected input signals (at connector J3) switches from high-to-low. Double
edge mode generates an interrupt on both high-to-low and low-to-high transitions.
Jumper Jumper Jumper Jumper Jumper As As As As As
Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped
V13[1-2] Interrupt Edge Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rising Edge Only
In – Rising Edge Only
Out – Rising and Falling Edges
Figure 2-22. Digital Interrupt Edge Select
Configuration — Digital Input/Output