Omega Vehicle Security OMG-COMM2-EX Manuel D’Utilisation

 

Card Setup 

OMG-COMM2-EX 

Page 4 

Headers E9 and E10 select the interrupt modes for each port. Each port must be 
set in the correct mode to insure proper installation. E10 sets Port 1 and E9 sets 
Port 2 

‘N’ indicates the (N)ormal, single interrupt per port mode. ‘S’ Indicates the 
(S)hared interrupt mode, which allows more than one port to access a single IRQ. 
Any two or more ports can share a common IRQ by placing the jumpers on the 
same IRQ setting, and setting the appropriate selections at E1. Consult your 
particular software for IRQ selection. If no interrupt is desired, remove the 
jumper. ‘M’ indicates the inclusion of a 1K ohm pull-down resistor required on 
one port when sharing interrupts. 

E10

E9

N      S       M

N             S               M

 

Set the jumpers to ‘S’ for shared interrupt mode on all blocks sharing an IRQ 
except one. Set that port block for ‘M’. This provides the pull-down resistor 
circuit that makes sharing of IRQs possible. If you are using more than one 
OMG-COMM2-EX or a compatible adapter in a bus you should only have one 
port set to ‘M’. The following example shows both ports sharing a single IRQ. 

E10

E9

N             S               M

N      S       M