Advanced Configuration and Power Interface Specification

Device Configuration
To specify multiple interrupt numbers, this descriptor allows vendors to list an array of possible
interrupt numbers, any one of which can be used.
Table 6-216 Extended Interrupt Descriptor Definition
Offset Field Name Definition
Byte 0 Extended Interrupt Value = 0x89 (10001001B) – Type = 1, Large item name = 0x09
Descriptor
Byte 1 Length, bits [7:0] Variable length, minimum value = 0x06
Byte 2 Length, bits [15:8] Variable length, minimum value = 0x00
Byte 3 Interrupt Vector Interrupt Vector Information.
Flags
Bit [7:5] Reserved (must be 0)
Bit [4] Wake Capability, _WKC
0x0 = Not Wake Capable: This interrupt is not capable of waking
the system.
0x1 = Wake Capable: This interrupt is capable of waking the
system from a low-power idle state or a system sleep state.
Bit [3] Interrupt Sharing, _SHR
0x0 = Exclusive: This interrupt is not shared with other devices.
0x1 = Shared: This interrupt is shared with other devices.
Bit [2] Interrupt Polarity, _LL
0 Active-High: This interrupt is sampled when the signal is high,
or true.
1 Active-Low: This interrupt is sampled when the signal is low, or
false.
Bit [1] Interrupt Mode, _HE
0 Level-Triggered: Interrupt is triggered in response to the signal
being in either a high or low state.
1 Edge-Triggered: This interrupt is triggered in response to a
change in signal state, either high to low or low to high.
Bit [0] Consumer/Producer:
1 This device consumes this resource
0 This device produces and consumes this resource
Byte 4 Interrupt table
length
Indicates the number of interrupt numbers that follow. When this descriptor
is returned from _CRS, or when OSPM passes this descriptor to _SRS, this
field must be set to 1.
Byte
4n+5
Byte
4n+6
Byte
4n+7
Byte
4n+8
Interrupt Number,
_INT bits [7:0]
Interrupt Number,
_INT bits [15:8]
Interrupt Number,
_INT bits [23:16]
Interrupt Number,
_INT bits [31:24]
Interrupt number
… … Additional interrupt numbers
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