MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 1162

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PCI Express Interface Controller
18.4.4
All device power states are supported with the exception of D3cold with Vaux. In addition, all link power
states are supported with the exception of L2 states. Only L0s ASPM mode is supported if enabled by
configuring the Link Control register’s bits 1–0 in configuration space. Note that there is no power saving
in the controller when the device is put into a non-D0 state. The only power saving is the I/O drivers when
the controller is put into a non-L0 link state.
18.4.4.1
The L2/L3 Ready link state is entered after the EP device is put into a D3hot state followed by a
PME_Turn_Off/PME_TO_Ack message handshake protocol. Exiting this state requires a POR reset or a
WAKE signal from the EP device. The PCI Express controller (in EP mode) does not support the
generation of beacon; therefore, as an alternative, the device can use one of the GPIO signals as an enable
to an external tristate buffer to generate a WAKE signal, as shown in
18-108
Component
D-State
D3cold
D3hot
D0
D1
D2
Power Management
L2/L3 Ready Link State
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
L0, L0s, L1, L2/L3
Interconnect
Permissible
L0, L0s, L1
L0, L0s, L1
CPLD (Memory Read Completion, IO Read
L0, L0s
CPLH (Memory Read Completion, IO R/W
Ready
State
L3
Completion, Cfg Read Completion)
Completion, Cfg R/W Completion)
Table 18-123. Power Management State Supported
In full operation.
All outbound traffics are stalled. All inbound traffics will be thrown away. The only
exceptions are PME messages and configuration transactions. If the device is in RC
mode, it is permissible to send a PM_Turn_Off message via the PEX Power
Management Command register.
All outbound traffics are stalled. All inbound traffics will be thrown away. The only
exceptions are PME messages and configuration transactions. If the device is in RC
mode, it is permissible to send a PM_Turn_Off message via the PEX Power
Management Command register.
All outbound traffics are stalled. All inbound traffics will be thrown away. The only
exceptions are PME messages and configuration transactions. If the device is in RC
mode, it is permissible to send a PM_Turn_Off message via the PEX Power
Management Command register. Note that if a transition of D3hot->D0 occurs, a reset
is performed to the controller’s configuration space. In addition, link training will restart.
Completely off.
Credit Type
Table 18-122. Initial credit advertisement
Initial Credit Advertisement
Action
Figure
Infinite
Infinite
18-130.
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