Quick Reference Guide

84 CIM_LogicalElement
The CIM_IRQ class described in Table 3-36 contains IRQ information. An
IRQ is a signal that data is about to be sent to or received by a peripheral
device. The signal travels by an IRQ line to the microprocessor. Each
peripheral connection must be assigned an IRQ number. For example, the
first serial port in your computer (COM1) is assigned to IRQ4 by default.
Table 3-36. CIM_IRQ Properties
Class Name: CIM_IRQ
Parent Class: CIM_SystemResource
Property Description Data Type
CSCreationClassName See Table 1-1. string
CSName See Table 1-1. string
CreationClassName See Table 1-1. string
IRQNumber Identifies the interrupt request number. uint32
Availability Indicates the availability of the IRQ. Values for
the Availability property are as follows:
1 - Other
2 - Unknown
3 - Available
4 - In use/not available
5 - In use and available
uint16
TriggerLevel Indicates whether the interrupt is triggered by
the hardware signal going high or low. Values for
the TriggerLevel property are as follows:
1 - Other
2 - Unknown
3 - Active low
4 - Active high
uint16
TriggerType Indicates whether edge (value=4) or level
triggered (value=3) interrupts occur.
1 - Other
2 - Unknown
uint16