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DP83816 Datasheet(PDF) 37 Page - National Semiconductor (TI) |
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DP83816 Datasheet(HTML) 37 Page - National Semiconductor (TI) |
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37 / 106 page  37 www.national.com 4.0 Register Set (Continued) 4.1.12 Power Management Control and Status Register This register contains PM control and status information. Bit Bit Name Description 24-22 AUX_CURRENT Aux_Current This 3 bit field reports the 3.3Vaux auxiliary current requirements for the PCI function. If PMEN generation from D3cold is not supported by the function(PMCAP[31]), this field returns a value of "000b" when read. Bit 3.3Vaux 24 23 22 Max. Current Required 1 1 0 320 mA 0 0 0 0 (self powered) 21 DSI Device Specific Initialization This bit is set to 1 to indicate to the system that initialization of the DP83816 device is required (beyond the standard PCI configuration header) before the generic class device driver is able to use it. A 1 indicates that DP83816 requires a DSI sequence following transition to the D0 uninitialized state. This bit can be loaded from the EEPROM. 20 Reserved (reads return 0) 19 PMEC PME Clock Returns 0 to indicate PCI clock not needed for PMEN. 18-16 PMV Power Management Version This bit field indicates compliance to a specific PM specification rev level. Currently set to 010b. 15-8 NLIPTR Next List Item Pointer Offset into PCI configuration space for the location of the next item in the Capabilities Linked List. Returns 00h as no other capabilities are offered. 7-0 CAPID Capability ID Always returns 01h for Power Management ID. Tag: PMCSR Size: 32 bits Hard Reset: 00000000h Offset: 44h Access: Read Write Soft Reset: unchanged Bit Bit Name Description 31-24 Reserved (reads return 0) 23-16 BSE Bridge Support Extensions unused (reads return 0) 15 PMESTS PME Status Sticky bit which represents the state of the PME logic, regardless of the state of the PMEEN bit. 14-9 Reserved (reads return 0) 8 PMEEN PME Enable When set to 1, this bit enables the assertion of the PME function on the PMEN pin. When 0, the PMEN pin is forced to be inactive. This value can be loaded from the EEPROM. 7-2 Unused (reads return 0) 1-0 PSTATE Power State This 2 bit field is used to determine the current power state of DP83816, and to set a new power state. 00 - D0 10 - D2 01 - D1 11 - D3hot/cold |
Similar Part No. - DP83816 |
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Similar Description - DP83816 |
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