PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
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<strong>PCIe</strong> Power Management Overview<br />
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<strong>PCIe</strong> PM involves transitioning devices through L<br />
states<br />
l <strong>PCIe</strong> Active State Power Management (ASPM) allows<br />
autonomous hardware based active state control of a device<br />
– If the Link is inactive for a period of time,<br />
ASPM transitions the device to a lower power<br />
state<br />
PCI PM involves ‘D’ states<br />
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Express devices emulate D state transitions by moving the<br />
device through Express L states<br />
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The Link Training and Status State Machine<br />
(LTSSM) controls device’s Data Link and<br />
Physical Layer operation<br />
Copyright by Dashcourses, Inc. 2009<br />
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