82801DB Datasheet, PDF (261/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

LAN Controller Registers (B1:D8:F0)
Bit
Description
Power State — R/W. This 2-bit field is used to determine the current power state of the integrated
LAN controller, and to put it into a new power state. The definition of the field values is as follows:
00 = D0
1:0 _{01 = D1}
10 = D2
11 = D3
7.1.24
PCIDATA — PCI Power Management Data Register
(LAN Controller—B1:D8:F0)
Offset Address: E3h
Default Value: 00h
Attribute:
Size:
RO
8 bits
Bit
Description
7:0 State dependent power consumption and heat dissipation data.
Note:
The data register is an 8-bit read only register that provides a mechanism for the ICH4’s integrated
LAN controller to report state dependent maximum power consumption and heat dissipation. The
value reported in this register depends on the value written to the Data Select field in the PMCSR
register. The power measurements defined in this register have a dynamic range of 0 W to 2.55 W
with 0.01 W resolution, scaled according to the Data Scale field in the PMCSR. The structure of
the Data Register is given in Table 7-3.
Table 7-3. Data Register Structure
Data Select
0
1
2
3
4
5
6
7
8
9–15
Data Scale
2
2
2
2
2
2
2
2
2
0
Data Reported
D0 Power Consumption
D1 Power Consumption
D2 Power Consumption
D3 Power Consumption
D0 Power Dissipated
D1 Power Dissipated
D2 Power Dissipated
D3 Power Dissipated
Common Function Power Dissipated
Reserved
Intel^® 82801DB ICH4 Datasheet
261