Avago Technologies LSI8751D - Manual (Page 91)

Configuration Registers 3-27
PST PME Status 15
The device always returns a zero for this bit, indicating
that PME signal generation is not supported from D3cold.
DSCL Data Scale [14:13]
This device does not support the Data register.
Therefore, this field is always set to 00b.
DSLT Data Select [12:9]
This device does not support the Data register.
Therefore, this field is always set to 0000b.
PEN PME Enable 8
This device always returns a zero for this bit to indicate
that PME assertion is disabled.
R Reserved [7:2]
PWS Power State [1:0]
This two bit field determines the current power state for
the function and is used to set the function to a new
power state. The definition of the field values are:
Register: 0x46
Bridge Support Extensions (PMCSR_BSE)
Read Only
BSE Bridge Support Extensions [7:0]
This register applies to the LSI53C875E only and can
support PCI bridge specific functionality, if required. The
default value always returns 0x00.
0b00 D0
0b01 Reserved
0b10 Reserved
0b11 D3 hot
7 0
BSE
0 0 0 0 0 0 0 0