Real-time interrupt source

Select a real-time interrupt source from the I/O board.


Default: Timer


Specifies that the board interrupt source is a timer.

Auto (PCI only)

Enables the Simulink® Real-Time™ software to automatically determine the IRQ that the BIOS assigned to the board and use it.

3 to 15

Specifies that the board interrupt source is an IRQ number on the board.


  • The Auto (PCI only) option is available only for PCI boards. If you have an ISA board (PC/104 or onboard parallel port), set the IRQ manually.

  • The Simulink Real-Time software treats PCI parallel port plugin boards like ISA boards. For PCI parallel port plugin boards, set the IRQ manually.

  • Multiple boards can share an interrupt number.

Command-Line Information

Parameter: RL32IRQSourceModifier
Type: character vector
Value: 'Timer' | Auto (PCI only) | '3'|'4'|'5' | '6'|'7' |'8' |'9' |'10' |'11' |'12' |'13' |'14' |'15'
Default: 'Timer'
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