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41210 Serial to Parallel PCI Bridge Developer’s Manual 39
Power Management
To support the PCI Express* power-management event-signaling protocol, the 41210 supports the
following messages:
• PME_Turn_Off
• PME_TO_ACK
PME_Turn_Off is used to turn off PME generation from all PCI Express* devices before the
system power-manager disconnects the power from the PCI Express* link hierarchy. The 41210
acknowledges the reception of a PME_Turn_Off message with a PME_TO_ACK message to the
north device. Refer to the PCI Express* Specification, Revision 1.0a for more details on the PME
handshake mechanism.
The 41210 does not use Vaux power. As a result, the 41210 does not support PME# assertion from
the D3cold state.
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