19 maxlat - maximum latency register (device #2) – Intel D15343-003 User Manual

Page 109

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Register Description

D15343-003

109

4.11.19

MAXLAT – Maximum Latency Register (Device #2)

4.11.20

PMCAP – Power Management Capabilities Register (Device #2)

Address Offset:
Default Value:
Access:
Size:

3Fh
00h
Read Only
8 bits

Bit

Description

7:0

Maximum Latency Value

: Bits[7:0]=00h. The IGD has no specific requirements for how often it

needs to access the PCI bus.

Address Offset:
Default Value:
Access:
Size:

D2-D3h
0221h
Read Only
16 bits

Bit

Description

15:11

PME Support:

This field indicates the power states in which the IGD may assert PME#. Hardwired

to 0 to indicate that the IGD does not assert the PME# signal.

10:6

Reserved

5

Device Specific Initialization (DSI):

Hardwired to 1 to indicate that special initialization of the IGD

is required before generic class device driver is to use it.

4

Auxiliary Power Source:

Hardwired to 0.

3

PME Clock:

Hardwired to 0 to indicate IGD does not support PME# generation.

2:0

Version:

Hardwired to 001b to indicate there are 4 bytes of power management registers

implemented.

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