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| Networking Silicon — GD82559ER |
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| Table 11. Power Management Driver Register | |
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Bits | Default | Read/Write | Description |
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29 | 0b | Read/Clear | Interesting Packet. This bit is set when an “interesting” packet is |
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| received. Interesting packets are defined by the 82559ER packet |
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| filters. This bit is cleared by writing 1b to it. |
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28:26 | 000b | Read Only | Reserved. These bits are reserved and should be set to 000b. |
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25 | 0b | Read/Clear | Reserved. These bit is reserved and should be set to 0b. |
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24 | 0b | Read/Clear | PME Status. This bit is a reflection of the PME Status bit in the Power |
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| Management Control/Status Register (PMCSR). It is set upon a wake- |
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| up event and is independent of the PME Enable bit. |
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| This bit is cleared by writing 1b to it. This also clears the PME Status |
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| bit in the PMCSR and |
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Note: The PMDR is initialized at ALTRST# reset only.
The General Control register is a byte register and is described below.
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| Table 12. General Control Register |
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Bits | Default | Read/Write | Description |
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7:2 | 000000b | Read Only | Reserved. These bits are reserved and should be set to 000000b. |
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1 | 0b | Read/Write | Deep |
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| field, the 82559ER may enter a deep |
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| the D2 and D3 power states while the link is down. |
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| In this state, the 82559ER does not keep link integrity. This state is not |
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| supported for |
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0 | 0b | Read/Write | Clockrun Signal Disable. If this bit is set to 1b, then the 82559ER will |
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| always request the PCI clock signal. This mode can be used to |
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| overcome potential receive overruns caused by Clockrun signal |
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| latencies over 5 μs. |
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The General Status register is a byte register which indicates the link status of the 82559ER.
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| Table 13. General Status Register |
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Bits | Default | Read/Write | Description |
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7:3 | 00000b | Read Only | Reserved. These bits are reserved and should be set to 00000b. |
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2 | Read Only | Duplex Mode. This bit indicates the wire duplex mode: full duplex (1b) | |
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| or half duplex (0b). |
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1 | Read Only | Speed. This bit indicates the wire speed: 100 Mbps (1b) or 10 Mbps | |
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| (0b). |
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0 | 0b | Read Only | Link Status Indication. This bit indicates the status of the link: valid |
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| (1b) or invalid (0b). |
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Datasheet | 61 |