Intel 82540EP/EM Benutzerhandbuch
142
Software Developer’s Manual
Power Management
6.3.3.5
PMCSR_BSE Bridge Support Extensions
1 Byte Offset = 6 (RO)
This register indicates support for PCI bridge specific functions. Note that these functions are not
implemented in the Ethernet controller and the values are set to 00h.
implemented in the Ethernet controller and the values are set to 00h.
6.3.3.6
Data Register
1 Byte Offset = 7 (RO)
This register is used to report power consumption and heat dissipation. Its value and meaning is
determined by the value programmed in the Data_Select field of the Power Management Control/
Status Register (PMCSR).
determined by the value programmed in the Data_Select field of the Power Management Control/
Status Register (PMCSR).
The units are defined by the Data_Scale field of the Power Management Control/Status Register.
If power management is disabled in the EEPROM, then the data register always reads 0b.
Bits
Default
R/W
Description
07:00
00h (loaded
from
EEPROM)
from
EEPROM)
Read
Only
Only
Data returned.
See the following explanation.
Data Select
Meaning
0
D0 Power Consumed
1
D1 Power Consumed
2
D2 Power Consumed
3
D3 Power Consumed
4
D0 Power Dissipated
5
D1 Power Dissipated
6
D2 Power Dissipated
7
D3 Power Dissipated
8
Common power consumption of multi-function devices
9-15
Reserved
Data Select
Meaning
0
Unknown (used for unsupported states)
1
0.1 Watts (used by Ethernet controller for supported
states)
states)
2
0.01 Watts
3
0.001 Watts