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For more information on PCI power management, see the PCI Bus Power Management Interface Specification for
PCI to CardBus Bridges.
3.8.9.2 OHCI 1394 (Function 2) Power Management
The PCI7x21/PCI7x11 controller complies with the PCI Bus Power Management Interface Specification. The
controller supports the D0 (unitialized), D0 (active), D1, D2, and D3 power states as defined by the power
management definition in the 1394 Open Host Controller Interface Specification, Appendix A4.
Table 3−16. Function 2 Power-Management Registers
REGISTER NAME OFFSET
Power-management capabilities Next item pointer Capability ID 44h
Data Power-management control/status register bridge support extensions Power-management control/status (CSR) 48h
3.8.9.3 Flash Media (Function 3) Power Management
The PCI Bus Power Management Interface Specification is applicable for the flash media dedicated sockets. This
function supports the D0 and D3 power states.
Table 3−17. Function 3 Power-Management Registers
REGISTER NAME OFFSET
Power-management capabilities Next item pointer Capability ID 44h
Data Power-management control/status register bridge support extensions Power-management control/status (CSR) 48h
3.8.9.4 SD Host (Function 4) Power Management
The PCI Bus Power Management Interface Specification is applicable for the SD host dedicated sockets. This
function supports the D0 and D3 power states.
Table 3−18. Function 4 Power-Management Registers
REGISTER NAME OFFSET
Power-management capabilities Next item pointer Capability ID 80h
Data Power-management control/status register bridge support extensions Power-management control/status (CSR) 84h
3.8.9.5 Smart Card (Function 5) Power Management
The PCI Bus Power Management Interface Specification is applicable for the Smart Card dedicated sockets. This
function supports the D0 and D3 power states.
Table 3−19. Function 5 Power-Management Registers
REGISTER NAME OFFSET
Power-management capabilities Next item pointer Capability ID 44h
Data Power-management control/status register bridge support extensions Power-management control/status (CSR) 48h
3.8.10 CardBus Bridge Power Management
The PCI Bus Power Management Interface Specification for PCI to CardBus Bridges was approved by PCMCIA in
December of 1997. This specification follows the device and bus state definitions provided in the PCI Bus Power
Management Interface Specification published by the PCI Special Interest Group (SIG). The main issue addressed
in the PCI Bus Power Management Interface Specification for PCI to CardBus Bridges is wake-up from D3
hot
or D3
cold
without losing wake-up context (also called PME context).
The specific issues addressed by the PCI Bus Power Management Interface Specification for PCI to CardBus Bridges
for D3 wake-up are as follows:
• Preservation of device context. The specification states that a reset must occur during the transition from
D3 to D0. Some method to preserve wake-up context must be implemented so that the reset does not clear
the PME
context registers.
• Power source in D3
cold
if wake-up support is required from this state.