GD82559ER Datasheet, PDF (61/94 Pages) Intel Corporation – PCI Controller

Networking Silicon — GD82559ER
7.1.19
Table 8. Power Management Capability Register
Bits
24:22
21
20
19
18:16
Default
000b
1b
0b (PCI)
0b
010b
Read/Write
Description
Read Only
Read Only
Read Only
Read Only
Read Only
Auxiliary Current. This field reports whether the 82559ER
implements the Data registers. The auxiliary power consumption is
the same as the current consumption reported in the D3 state in the
Data register.
Device Specific Initialization (DSI). The DSI bit indicates whether
special initialization of this function is required (beyond the standard
PCI configuration header) before the generic class device driver is
able to use it. DSI is required for the 82559ER after D3-to-D0 reset.
Reserved (PCI). When this bit is set to ‘1’, it indicates that the
82559ER requires auxiliary power supplied by the system for wake-
up from the D3_cold state.
PME Clock. The 82559ER does not require a clock to generate a
power management event.
Version. A value of indicates that the 82559ER complies with the PCI
Power Management Specification, Revision 2.2.
Power Management Control/Status Register (PMCSR)
The Power Management Control/Status is a word register. It is used to determine and change the
current power state of the 82559ER and control the power management interrupts in a standard
manner.
Table 9. Power Management Control and Status Register
Bits
15
Default
0b
Read/Write
Description
Read/Clear
PME Status. This bit is set upon a wake-up event. It is independent of
the state of the PME Enable bit. If 1b is written to this bit, the bit will be
cleared. It also de-asserts the PME# signal and clears the PME status
bit in the Power Management Driver Register. When the PME# signal
is enabled, the PME# signal reflects the state of the PME status bit.
14:13 00b
12:9 0000b
8
0b
7:5
000b
4
0b
3:2
00b
1:0
00b
Read Only
Read Only
Read Clear
Read Only
Read Only
Read Only
Read/Write
Data Scale. This field indicates the data register scaling factor. It
equals 10b for registers zero through eight and 00b for registers nine
through fifteen.
Data Select. This field is used to select which data is reported through
the Data register and Data Scale field.
PME Enable. This bit enables the 82559ER to assert PME#.
Reserved. These bits are reserved and should be set to 000b.
Dynamic Data. The 82559ER does not support the ability to monitor
the power consumption dynamically.
Reserved. These bits are reserved and should be set to 00b.
Power State. This 2-bit field is used to determine the current power
state of the 82559ER and to set the 82559ER into a new power state.
The definition of the field values is as follows.
00 - D0
01 - D1
10 - D2
11 - D3
Datasheet
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