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PCIe Devices - PLX Technology

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Receive Side of Data Link Layer<br />

n<br />

Data Link Layer receiver<br />

l<br />

Processes received TLPs<br />

– Validates Sequence number,<br />

computes and compares LCRC<br />

• Strips fields and passes to Transaction<br />

Layer<br />

Transaction Layer<br />

Data Link Layer<br />

l<br />

Processes received DLLPs<br />

– Processing of Ack/Nak, PM, and<br />

FC DLLPs is done in hardware<br />

• May or may not have information passed to<br />

Transaction Layer as a result of DLLP<br />

processing<br />

Physical Layer<br />

Logical Sub-block<br />

Physical Sub-block<br />

Physical Link<br />

Copyright by Dashcourses, Inc. 2009<br />

3-96

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