Power Management
PLX Technology, Inc.
Figure 10-1. Power Management Controller Functional Block Diagram
Power Management Controller
PM Event
Hot Plug
Controller
PME
Handler
Device
States
Device State
Link State
Control
CSR Write Path
CSR Read Path
Physical
Layer
Power
Management
CSR
Interface
Link
State
Management
CSR,
Interrupt,
and
Message
Control
DLLP Receive
DLLP Transmit
Message Write
Data Link
Layer
Interface
Message
Control
Suspend Timers
Message Response
PM_Message_Req
TLP Availability/Credits
TLP
Egress
Port
Arbiter
Arb_Message_Ack
Note: The Hot Plug Controller is available only on downstream ports.
134
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