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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)
Read
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)
2 0.01 Watts
3 0.001 Watts