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28 Programmer’s Reference Manual
Intel
®
High Definition Audio Controller Registers (D27:F0)
1.1.31 PXC—PCI Express* Capabilities Register
(Intel
®
High Definition Audio Controller—D27:F0)
Address Offset: 72h–73h Attribute: RO
Default Value: 0091h Size: 16 bits
1.1.32 DEVCAP—Device Capabilities Register
(Intel
®
High Definition Audio Controller—D27:F0)
Address Offset: 74h–77h Attribute: R/WO, RO
Default Value: 00000000h Size: 32 bits
Bit Description
15:14 Reserved
13:9 Interrupt Message Number (IMN) — RO. Hardwired to 0.
8 Slot Implemented (SI) — RO. Hardwired to 0.
7:4
Device/Port Type (DPT) — RO. Hardwired to 1001b. Indicates that this is a Root Complex
Integrated endpoint device.
3:0 Capability Version (CV) — RO. Hardwired to 0001b. Indicates version #1 PCI Express capability.
Bit Description
31:28 Reserved
27:26 Captured Slot Power Limit Scale (SPLS) — RO. Hardwired to 0.
25:18 Captured Slot Power Limit Value (SPLV) — RO. Hardwired to 0.
17:15 Reserved
14 Power Indicator Present — RO. Hardwired to 0.
13 Attention Indicator Present — RO. Hardwired to 0.
12 Attention Button Present — RO. Hardwired to 0.
11:9 Endpoint L1 Acceptable Latency — R/WO.
8:6 Endpoint L0s Acceptable Latency — R/WO.
5 Extended Tag Field Support — RO. Hardwired to 0. Indicates 5-bit tag field support
4:3
Phantom Functions Supported — RO. Hardwired to 0. Indicates that phantom functions are not
supported.
2:0
Max Payload Size Supported — RO. Hardwired to 0. Indicates 128-B maximum payload size
capability.