Intel PCI User Manual
140
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.
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).
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.
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