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Power management control/status, 0x44, Register: 0x44 – Avago Technologies LSI53C876E User Manual

Page 112

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4-18

Registers

APS

Auxiliary Power Source

4

Because the LSI53C876E does not provide a PME
signal, this bit always returns a 0, indicating that no
auxiliary power source is required to support the PME
signal in the D3cold power management state.

PMEC

PME Clock

3

This field is always set to 00000b because the
LSI53C876E does not provide a PME signal.

VER

Version

[2:0]

This field is set to 001b to indicate that the LSI53C876E
complies with Revision 1.0 of the PCI Power
Management Interface Specification.

Register: 0x44

Power Management Control/Status
Read/Write

This register applies to the LSI53C876E only and indicates the power
management control and status descriptions.

PST

PME Status

15

The LSI53C876E always returns a zero for this bit,
indicating that PME signal generation is not supported
from D3cold.

DSCL

Data Scale

[14:13]

The LSI53C876E does not support the

Data

register.

Therefore, this field is always set to 00b.

DSLT

Data Select

[12:9]

The LSI53C876E does not support the

Data

register.

Therefore, this field is always set to 0000b.

PEN

PME Enable

8

The LSI53C876E always returns a zero for this bit to
indicate that PME assertion is disabled.

15

14 13 12

9

8

7

2

1

0

PST DSCL

DSLT

PEN

R

PWS

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0