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| Networking Silicon — GD82559ER |
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| Table 8. Power Management Capability Register | |
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Bits | Default | Read/Write | Description |
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24:22 | 000b | Read Only | Auxiliary Current. This field reports whether the 82559ER |
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| implements the Data registers. The auxiliary power consumption is |
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| the same as the current consumption reported in the D3 state in the |
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| Data register. |
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21 | 1b | Read Only | Device Specific Initialization (DSI). The DSI bit indicates whether |
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| special initialization of this function is required (beyond the standard |
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| PCI configuration header) before the generic class device driver is |
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| able to use it. DSI is required for the 82559ER after |
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20 | 0b (PCI) | Read Only | Reserved (PCI). When this bit is set to ‘1’, it indicates that the |
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| 82559ER requires auxiliary power supplied by the system for wake- |
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| up from the D3cold state. |
19 | 0b | Read Only | PME Clock. The 82559ER does not require a clock to generate a |
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| power management event. |
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18:16 | 010b | Read Only | Version. A value of indicates that the 82559ER complies with the PCI |
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| Power Management Specification, Revision 2.2. |
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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.
Bits | Default | Read/Write | Description |
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15 | 0b | Read/Clear | PME Status. This bit is set upon a |
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| the state of the PME Enable bit. If 1b is written to this bit, the bit will be |
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| cleared. It also |
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| bit in the Power Management Driver Register. When the PME# signal |
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| is enabled, the PME# signal reflects the state of the PME status bit. |
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14:13 | 00b | Read Only | Data Scale. This field indicates the data register scaling factor. It |
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| equals 10b for registers zero through eight and 00b for registers nine |
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| through fifteen. |
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12:9 | 0000b | Read Only | Data Select. This field is used to select which data is reported through |
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| the Data register and Data Scale field. |
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8 | 0b | Read Clear | PME Enable. This bit enables the 82559ER to assert PME#. |
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7:5 | 000b | Read Only | Reserved. These bits are reserved and should be set to 000b. |
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4 | 0b | Read Only | Dynamic Data. The 82559ER does not support the ability to monitor |
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| the power consumption dynamically. |
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3:2 | 00b | Read Only | Reserved. These bits are reserved and should be set to 00b. |
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1:0 | 00b | Read/Write | Power State. This |
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| state of the 82559ER and to set the 82559ER into a new power state. |
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| The definition of the field values is as follows. |
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| 00 - D0 |
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| 01 - D1 |
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| 10 - D2 |
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| 11 - D3 |
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Datasheet | 55 |