Electrical Characteristics - SeaLevel DIO-16.PCI User Manual

Interrupt Control
When enabled, interrupts are generated on Port A bit D0.
IRQEN
IRC0
IRC1
Interrupt Mode Select Table
Interrupt source is Base+0 bit D0. When selecting the Interrupt Type, always disable interrupts prior to
changing or setting states. This will help prevent inadvertent or unexpected interrupts from occurring.
When using the High and Low Level interrupts, an interrupt occurs when input D0 changes to either
a High or Low state. This will cause the computer to remain in an interrupt state until the input state
changes.
Interrupt Read
Reading the Interrupt Status port (Base+5) clears any interrupt pending.
IRQST

Electrical Characteristics

Features
© Sealevel Systems, Inc. 8002 Manual | SL9021 10/2022
Interrupt enable 1 = enabled
Interrupt mode select, see table below
Interrupt mode select, see table below
IRC1 IRC0
0 0
0 1
1 0
1 1
(D0) Interrupt Status
•
8 SPST relays
•
1 eight bit optically isolated input port
•
DB-37 Male connector
•
Highly reliable 10 VA DIP reed relays
•
Multiple adapters can reside in same computer
•
PCI 2.1 Bus compatible
0 = disabled ( 0 on power up )
Interrupt Type
Low Level
High Level
Falling Edge
Rising Edge
1 = interrupt pending, 0 = none
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