KINTERRUPT_MODE enumeration

The KINTERRUPT_MODE enumeration type indicates whether an interrupt is level-triggered or edge-triggered.

Syntax

typedef enum _KINTERRUPT_MODE { 
  LevelSensitive  = 0,
  Latched         = 1
} KINTERRUPT_MODE;

Constants

LevelSensitive

The interrupt is level-triggered. This is the mode for traditional PCI line-based interrupts.

Latched

The interrupt is edge-triggered. This is the mode for PCI message-signaled interrupts.

Remarks

The interrupt mode is an electrical characteristic of the interrupt. A device signals a level-triggered interrupt by changing the voltage on the interrupt pin, and holding it there until the processor signals that the interrupt is received. In contrast, to signal an edge-triggered interrupt, the device changes the voltage state for a fixed period of time, before reverting to the original voltage state.

Requirements

See also

KINTERRUPT_POLARITY

IoConnectInterrupt

IoConnectInterruptEx

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Build date: 5/22/2013