Adaptec 1737100 Programmer Manual - Page 95
Type: R/W, Internal Registers Subgroup: PCI Functional Registers, Byte Address: 54h - 57h
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Page 95 highlights
Register Descriptions Table 7-31. Power Management Register (Continued) Reset Bit(s) rw Value Description/Function 18:16 r 1h PMVersion: This field indicates that there are 4 bytes of General Purpose Power Management registers implemented as described in revision 1.0 of the 'PCI Bus Power Management Interface Specification'. 15:8 r 00h NextItemPtr: This field provides an offset into the function's PCI configuration space pointing to the location of next item in the function's capability list. The AIC-6915 does not implement more items in the list. 7:0 r 01h PowerManagementId: This ID indicates the start of the Power Management Register Block PMCSR (Power Management Control/Status) Register Type: R/W Internal Registers Subgroup: PCI Functional Registers Byte Address: 54h - 57h Bit(s) 31:29 23:16 15 14:13 12:9 8 7:2 1:0 Table 7-32. Power Management Control Status Register Reset rw Value Description/Function r 0 PMData: This function is not implemented. The AIC-6915 does not provide information about the power it consumes. r 0 Reserved: Always read as 0. r/w 0 PmeStatus: This bit is set when the function would normally assert the PME_ signal independent of the state of the PMEEN bit. Setting this bit clears it and causes the function to stop asserting a PME_. Clearing the bit has no effect. r 0 DataScale: This function is not implemented. The AIC-6915 does not provide information about the power it consumes. r 0 DataSelect: This function is not implemented. The AIC-6915 does not provide information about the power it consumes. r/w 0 PmeEn: This bit enables the function to assert PME_. If this bit is cleared assertion of PME_ is disabled. r 0 Reserved: Always read as 0. r/w PowerState: This 2-bit field determines the power state of the AIC-6915 '00' - D0 '01' - D1 '10' - D2 '11' - D3 Reset Value: In CardBus mode, (when the EPROM A0 pin is sampled low at reset), the PowerState starts at D3. Otherwise, it starts at D0. 7-23
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