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Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

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Integrated Graphics Device (D2:F0) (<strong>Intel®</strong> 82<strong>945G</strong>/82<strong>945G</strong>C/ 82<strong>945G</strong>Z GMCH Only)<br />

7.1.27 PMCAPID—Power Management Capabilities ID (D2:F0)<br />

PCI Device: 2<br />

Address Offset: D0h<br />

Default Value: 0001h<br />

Access: RO<br />

Size: 16 bits<br />

Bit Access &<br />

Default<br />

15:8 RO<br />

00h<br />

7:0 RO<br />

01h<br />

Description<br />

NEXT_PTR: This field contains a pointer to the next item in the capabilities list.<br />

This is the final capability in the list and must be set to 00h.<br />

CAP_ID: SIG defines this ID is 01h for power management.<br />

7.1.28 PMCAP—Power Management Capabilities (D2:F0)<br />

PCI Device: 2<br />

Address Offset: D2h<br />

Default Value: 0022h<br />

Access: RO<br />

Size: 16 bits<br />

Bit Access &<br />

Default<br />

15:11 RO<br />

00h<br />

10 RO<br />

0b<br />

9 RO<br />

0b<br />

8:6 Reserved<br />

5 RO<br />

1b<br />

4 RO<br />

0b<br />

3 RO<br />

0b<br />

2:0 RO<br />

010b<br />

Description<br />

PME Support: This field indicates the power states in which the IGD may assert<br />

PME#. The field is hardwired to 0s to indicate that the IGD does not assert the<br />

PME# signal.<br />

D2: Hardwired to 0 to indicate that the D2 power management state is not<br />

supported.<br />

D1: Hardwired to 0 to indicate that the D1 power management state is not<br />

supported.<br />

Device Specific Initialization (DSI): Hardwired to 1 to indicate that special<br />

initialization of the IGD is required before generic class device driver is to use it.<br />

Auxiliary Power Source: Hardwired to 0.<br />

PME Clock: Hardwired to 0 to indicate IGD does not support PME# generation.<br />

Version: Hardwired to 010b to indicate that there are 4 bytes of power<br />

management registers implemented and that this device complies with the PCI<br />

Power Management Interface Specification, Revision 1.1.<br />

Intel ® 82<strong>945G</strong>/82<strong>945G</strong>/82<strong>945G</strong>C GMCH and 82<strong>945P</strong>/82<strong>945P</strong>L MCH Datasheet 187

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